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slapos.buildout
Commit bb152420 authored by Gary Poster's avatar Gary Poster
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Implementation complete to my knowledge. Tests pass locally. 

Need to check if tests are complete/sufficient, and test with multiple Pythons
and on Windows.

Changed zc.recipe.egg and the easy_install.scripts function into only adding
-S to scripts.

New package z3c.recipe.scripts and the easy_install.generate_scripts now
contains the more robust interpreter generation and the ability to
include site-packages.

Pertinent tests from the previous approach (from 3+ months ago) are
ported.  In the course of this port I discovered that big changes like
the ones in this checkin were needed.
parent 7794bee7
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CHANGES.txt
View file @ bb152420
Change History
**************
1.?.? (200?-??-??)
1.?.? (201?-??-??)
==================
New Features:
- Buildout can be safely used with a system Python. Note that the Python is
always used, by default, with -S: that is, site-packages are not
included. If you would like to have access to your site-packages, see
the next bullet point.
A limitation: in no cases are distributions in your site-packages used
to satisfy buildout dependencies. The site-packages can be used in
addition to the dependencies specified in your buildout, and buildout
dependencies can override code in your site-packages, but even if your
Python's site-packages has the same exact version as specified in your
buildout configuration, buildout will still use its own copy.
- Added new function to generate scripts and interpreter. It produces
a full-featured interpreter (all command-line options supported) and the
ability to safely let scripts include site packages (see
z3c.recipe.scripts). In this case a functioning site.py also is available
(and namespace packages are handled somewhat more efficiently than standard
pkg_resources usage).
- Improve bootstrap.
* New options let you specify where to find ez_setup.py and where to find
......@@ -28,6 +47,16 @@ Bugs fixed:
This means, among other things, that ``bin/buildout -vv`` and
``bin/buildout annotate`` correctly list more of the options.
- Installing a namespace package using a Python that already has a package
in the same namespace (e.g., in the Python's site-packages) in some cases.
- The error showed itself when at least two dependencies were in a shared
location like site-packages, and the first one met the "versions"
setting. The first dependency would be added, but subsequent
dependencies from the same location (e.g., site-packages) would use
the version of the package found in the shared location, ignoring the
version setting.
1.4.1 (2009-08-27)
==================
......
README.txt
View file @ bb152420
......@@ -37,6 +37,11 @@ Existing recipes include:
dependencies. It installs their console-script entry points with
the needed eggs included in their paths.
`z3c.recipe.scripts <http://pypi.python.org/pypi/z3c.recipe.scripts>`_
This scripts recipe builds interpreter scripts and entry point scripts
based on eggs. These scripts have more features and flexibility than the
ones offered by zc.recipe.egg.
`zc.recipe.testrunner <http://pypi.python.org/pypi/zc.recipe.testrunner>`_
The testrunner egg creates a test runner script for one or
more eggs.
......@@ -126,7 +131,7 @@ If I need to run a previous version of zc.buildout, I use the
`--version` option of the bootstrap.py script::
$ python bootstrap.py --version 1.1.3
The `zc.buildout project <http://svn.zope.org/zc.buildout/trunk>`_
is a slightly more complex example of this type of buildout.
......
buildout.cfg
View file @ bb152420
[buildout]
develop = zc.recipe.egg_ .
develop = zc.recipe.egg_ z3c.recipe.scripts_ .
parts = test oltest py
[py]
......@@ -13,6 +13,7 @@ recipe = zc.recipe.testrunner
eggs =
zc.buildout
zc.recipe.egg
z3c.recipe.scripts
# Tests that can be run wo a network
[oltest]
......@@ -20,6 +21,7 @@ recipe = zc.recipe.testrunner
eggs =
zc.buildout
zc.recipe.egg
z3c.recipe.scripts
defaults =
[
'-t',
......
src/zc/buildout/easy_install.py
View file @ bb152420
......@@ -304,7 +304,7 @@ class Installer:
ws, False,
)[0].location
args = ('-c', _easy_install_cmd, '-mUNxd', _safe_arg(tmp))
args = ('-Sc', _easy_install_cmd, '-mUNxd', _safe_arg(tmp))
if self._always_unzip:
args += ('-Z', )
level = logger.getEffectiveLevel()
......@@ -498,7 +498,7 @@ class Installer:
if dist is None:
raise zc.buildout.UserError(
"Couln't download distribution %s." % avail)
"Couldn't download distribution %s." % avail)
if dist.precedence == pkg_resources.EGG_DIST:
# It's already an egg, just fetch it into the dest
......@@ -631,9 +631,9 @@ class Installer:
logger.debug('Installing %s.', repr(specs)[1:-1])
path = self._path
dest = self._dest
if dest is not None and dest not in path:
path.insert(0, dest)
destination = self._dest
if destination is not None and destination not in path:
path.insert(0, destination)
requirements = [self._constrain(pkg_resources.Requirement.parse(spec))
for spec in specs]
......@@ -664,7 +664,7 @@ class Installer:
except pkg_resources.DistributionNotFound, err:
[requirement] = err
requirement = self._constrain(requirement)
if dest:
if destination:
logger.debug('Getting required %r', str(requirement))
else:
logger.debug('Adding required %r', str(requirement))
......@@ -907,6 +907,9 @@ def develop(setup, dest,
def working_set(specs, executable, path):
return install(specs, None, executable=executable, path=path)
############################################################################
# Script generation functions
def scripts(reqs, working_set, executable, dest,
scripts=None,
extra_paths=(),
......@@ -914,22 +917,85 @@ def scripts(reqs, working_set, executable, dest,
interpreter=None,
initialization='',
relative_paths=False,
import_site=False,
):
"""Generate scripts and/or an interpreter.
path = [dist.location for dist in working_set]
path.extend(extra_paths)
path = map(realpath, path)
See generate_scripts for a newer version with more options and a
different approach.
"""
path = _get_path(working_set, extra_paths)
if initialization:
initialization = '\n'+initialization+'\n'
generated = _generate_scripts(
reqs, working_set, dest, path, scripts, relative_paths,
initialization, executable, arguments)
if interpreter:
sname = os.path.join(dest, interpreter)
spath, rpsetup = _relative_path_and_setup(sname, path, relative_paths)
generated.extend(
_pyscript(spath, sname, executable, rpsetup))
return generated
def generate_scripts(
dest, working_set, executable, site_py_dest,
reqs=(), scripts=None, interpreter=None, extra_paths=(),
initialization='', add_site_packages=False, exec_sitecustomize=False,
relative_paths=False, script_arguments='', script_initialization=''):
"""Generate scripts and/or an interpreter.
This accomplishes the same job as the ``scripts`` function, above,
but it does so in an alternative way that allows safely including
Python site packages, if desired, and choosing to execute the Python's
sitecustomize.
"""
generated = []
generated.append(_generate_sitecustomize(
site_py_dest, executable, initialization, exec_sitecustomize))
generated.append(_generate_site(
site_py_dest, working_set, executable, extra_paths,
add_site_packages, relative_paths))
script_initialization = (
'\nimport site # imports custom buildbot-generated site.py\n%s' % (
script_initialization,))
if not script_initialization.endswith('\n'):
script_initialization += '\n'
generated.extend(_generate_scripts(
reqs, working_set, dest, [site_py_dest], scripts, relative_paths,
script_initialization, executable, script_arguments))
if interpreter:
generated.extend(_generate_interpreter(
interpreter, dest, executable, site_py_dest, relative_paths))
return generated
# Utilities for the script generation functions.
# These are shared by both ``scripts`` and ``generate_scripts``
def _get_path(working_set, extra_paths=()):
"""Given working set and extra paths, return a normalized path list."""
path = [dist.location for dist in working_set]
path.extend(extra_paths)
return map(realpath, path)
def _generate_scripts(reqs, working_set, dest, path, scripts, relative_paths,
initialization, executable, arguments):
"""Generate scripts for the given requirements.
- reqs is an iterable of string requirements or entry points.
- The requirements must be findable in the given working_set.
- The dest is the directory in which the scripts should be created.
- The path is a list of paths that should be added to sys.path.
- The scripts is an optional dictionary. If included, the keys should be
the names of the scripts that should be created, as identified in their
entry points; and the values should be the name the script should
actually be created with.
- relative_paths, if given, should be the path that is the root of the
buildout (the common path that should be the root of what is relative).
"""
if isinstance(reqs, str):
raise TypeError('Expected iterable of requirements or entry points,'
' got string.')
if initialization:
initialization = '\n'+initialization+'\n'
generated = []
entry_points = []
for req in reqs:
if isinstance(req, str):
......@@ -943,7 +1009,6 @@ def scripts(reqs, working_set, executable, dest,
)
else:
entry_points.append(req)
for name, module_name, attrs in entry_points:
if scripts is not None:
sname = scripts.get(name)
......@@ -951,126 +1016,48 @@ def scripts(reqs, working_set, executable, dest,
continue
else:
sname = name
sname = os.path.join(dest, sname)
spath, rpsetup = _relative_path_and_setup(sname, path, relative_paths)
generated.extend(
_script(module_name, attrs, spath, sname, executable, arguments,
initialization, rpsetup, import_site)
)
if interpreter:
sname = os.path.join(dest, interpreter)
spath, rpsetup = _relative_path_and_setup(sname, path, relative_paths)
generated.extend(
_pyscript(spath, sname, executable, rpsetup, import_site))
_script(sname, executable, rpsetup, spath,
initialization, module_name, attrs, arguments))
return generated
def interpreter(name, working_set, executable, dest, site_py_dest,
extra_paths=(),
initialization='',
relative_paths=False,
import_site=False,
import_sitecustomize=False
):
generated = []
# Write sitecustomize.py.
sitecustomize_path = os.path.join(site_py_dest, 'sitecustomize.py')
sitecustomize = open(sitecustomize_path, 'w')
if initialization:
sitecustomize.write(initialization + '\n')
if import_sitecustomize:
real_sitecustomize_path = _get_module_file(
executable, 'sitecustomize')
if real_sitecustomize_path:
sitecustomize.write('execfile(%r)\n' % (real_sitecustomize_path,))
sitecustomize.close()
generated.append(sitecustomize_path)
# Write site.py.
path = [dist.location for dist in working_set]
path.extend(extra_paths)
path = map(realpath, path)
site_path = os.path.join(site_py_dest, 'site.py')
path_string, rpsetup = _relative_path_and_setup(
site_path, path, relative_paths)
site = open(site_path, 'w')
site.write(rpsetup)
site.write(sys_path_template % (path_string,))
if import_site:
real_site_path = _get_module_file(executable, 'site')
if real_site_path:
site.write(import_site_template % (real_site_path,))
else:
site.write('import sitecustomize\n')
generated.append(site_path)
# Write interpreter script.
script_name = full_name = os.path.join(dest, name)
site_py_dest_string, rpsetup = _relative_path_and_setup(
full_name, [site_py_dest], relative_paths)
if is_win32:
script_name += '-script.py'
contents = interpreter_template % dict(
python = _safe_arg(executable),
site_dest = site_py_dest_string,
relative_paths_setup = rpsetup,
)
changed = not (os.path.exists(script_name) and
open(script_name).read() == contents)
if is_win32:
# Generate exe file and give the script a magic name.
exe = full_name + '.exe'
open(exe, 'wb').write(
pkg_resources.resource_string('setuptools', 'cli.exe')
)
generated.append(exe)
if changed:
open(script_name, 'w').write(contents)
try:
os.chmod(script_name,0755)
except (AttributeError, os.error):
pass
logger.info("Generated interpreter %r.", full_name)
generated.append(script_name)
return generated
def _get_module_file(executable, name):
cmd = [executable, "-c",
"import imp; fp, path, desc = imp.find_module(%r); fp.close; print path" % (name,)]
_proc = subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = _proc.communicate();
if _proc.returncode:
logger.info(
'Could not find file for module %s:\n%s', name, stderr)
return None
# else: ...
res = stdout.strip()
if res.endswith('.pyc') or res.endswith('.pyo'):
raise RuntimeError('Cannot find uncompiled version of %s' % (name,))
if not os.path.exists(res):
raise RuntimeError(
'File does not exist for module %s:\n%s' % (name, res))
return res
def _relative_path_and_setup(sname, path,
relative_paths=False, indent_level=1):
"""Return a string of code of paths and of setup if appropriate.
def _relative_path_and_setup(sname, path, relative_paths):
- sname is the full path to the script name to be created.
- path is the list of paths to be added to sys.path.
- relative_paths, if given, should be the path that is the root of the
buildout (the common path that should be the root of what is relative).
- indent_level is the number of four-space indents that the path should
insert before each element of the path.
"""
if relative_paths:
relative_paths = os.path.normcase(relative_paths)
sname = os.path.normcase(os.path.abspath(sname))
spath = ',\n '.join(
spath = _format_paths(
[_relativitize(os.path.normcase(path_item), sname, relative_paths)
for path_item in path]
)
for path_item in path], indent_level=indent_level)
rpsetup = relative_paths_setup
for i in range(_relative_depth(relative_paths, sname)):
rpsetup += "base = os.path.dirname(base)\n"
else:
spath = repr(path)[1:-1].replace(', ', ',\n ')
spath = _format_paths((repr(p) for p in path),
indent_level=indent_level)
rpsetup = ''
return spath, rpsetup
def _relative_depth(common, path):
"""Return number of dirs separating ``path`` from ancestor, ``common``.
For instance, if path is /foo/bar/baz/bing, and common is /foo, this will
return 2--in UNIX, the number of ".." to get from bing's directory
to foo.
This is a helper for _relative_path_and_setup.
"""
n = 0
while 1:
dirname = os.path.dirname(path)
......@@ -1083,6 +1070,11 @@ def _relative_depth(common, path):
return n
def _relative_path(common, path):
"""Return the relative path from ``common`` to ``path``.
This is a helper for _relativitize, which is a helper to
_relative_path_and_setup.
"""
r = []
while 1:
dirname, basename = os.path.split(path)
......@@ -1096,6 +1088,11 @@ def _relative_path(common, path):
return os.path.join(*r)
def _relativitize(path, script, relative_paths):
"""Return a code string for the given path.
Path is relative to the base path ``relative_paths``if the common prefix
between ``path`` and ``script`` starts with ``relative_paths``.
"""
if path == script:
raise AssertionError("path == script")
common = os.path.dirname(os.path.commonprefix([path, script]))
......@@ -1113,73 +1110,63 @@ join = os.path.join
base = os.path.dirname(os.path.abspath(os.path.realpath(__file__)))
"""
def _script(module_name, attrs, path, dest, executable, arguments,
initialization, rsetup, import_site):
generated = []
script = dest
if is_win32:
dest += '-script.py'
if import_site:
import_site = import_site_snippet
else:
import_site = ''
contents = script_template % dict(
python = _safe_arg(executable),
path = path,
module_name = module_name,
attrs = attrs,
arguments = arguments,
initialization = initialization,
relative_paths_setup = rsetup,
import_site=import_site,
)
changed = not (os.path.exists(dest) and open(dest).read() == contents)
def _write_script(full_name, contents, logged_type):
"""Write contents of script in full_name, logging the action.
The only tricky bit in this function is that it supports Windows by
creating exe files using a pkg_resources helper.
"""
generated = []
script_name = full_name
if is_win32:
# generate exe file and give the script a magic name:
exe = script+'.exe'
script_name += '-script.py'
# Generate exe file and give the script a magic name.
exe = full_name + '.exe'
new_data = pkg_resources.resource_string('setuptools', 'cli.exe')
if not os.path.exists(exe) or (open(exe, 'rb').read() != new_data):
# Only write it if it's different.
open(exe, 'wb').write(new_data)
generated.append(exe)
changed = not (os.path.exists(script_name) and
open(script_name).read() == contents)
if changed:
open(dest, 'w').write(contents)
logger.info("Generated script %r.", script)
open(script_name, 'w').write(contents)
try:
os.chmod(dest, 0755)
os.chmod(script_name, 0755)
except (AttributeError, os.error):
pass
generated.append(dest)
logger.info("Generated %s %r.", logged_type, full_name)
generated.append(script_name)
return generated
def _format_paths(paths, indent_level=1):
"""Format paths for inclusion in a script."""
separator = ',\n' + indent_level * ' '
return separator.join(paths)
def _script(dest, executable, relative_paths_setup, path, initialization,
module_name, attrs, arguments):
contents = script_template % dict(
python = _safe_arg(executable),
path = path,
module_name = module_name,
attrs = attrs,
arguments = arguments,
initialization = initialization,
relative_paths_setup = relative_paths_setup,
)
return _write_script(dest, contents, 'script')
if is_jython and jython_os_name == 'linux':
script_header = '#!/usr/bin/env %(python)s -S'
else:
script_header = '#!%(python)s -S'
_import_site_start = '''\
# We have to import pkg_resources before namespace
# package .pth files are processed or else the distribution's namespace
# packages will mask all of the egg-based packages in the same namespace
# package.
try:
import pkg_resources
except ImportError:
pass
'''
import_site_snippet = _import_site_start + 'import site\n'
import_site_template = _import_site_start + 'execfile(%r)\n'
sys_path_template = '''\
import sys
sys.path[0:0] = [
%s,
]
%s,
]
'''
script_template = script_header + '''\
......@@ -1187,9 +1174,9 @@ script_template = script_header + '''\
%(relative_paths_setup)s
import sys
sys.path[0:0] = [
%(path)s,
]
%(import_site)s
%(path)s,
]
%(initialization)s
import %(module_name)s
......@@ -1197,57 +1184,15 @@ if __name__ == '__main__':
%(module_name)s.%(attrs)s(%(arguments)s)
'''
interpreter_template = script_header + '''\
%(relative_paths_setup)s
import os
import sys
argv = [sys.executable] + sys.argv[1:]
environ = os.environ.copy()
path = %(site_dest)s
if environ.get('PYTHONPATH'):
path = os.pathsep.join([path, environ['PYTHONPATH']])
environ['PYTHONPATH'] = path
os.execve(sys.executable, argv, environ)
'''
def _pyscript(path, dest, executable, rsetup, import_site):
generated = []
script = dest
if is_win32:
dest += '-script.py'
if import_site:
import_site = import_site_snippet
else:
import_site = ''
# These are used only by the older ``scripts`` function.
def _pyscript(path, dest, executable, rsetup):
contents = py_script_template % dict(
python = _safe_arg(executable),
path = path,
relative_paths_setup = rsetup,
import_site=import_site
)
changed = not (os.path.exists(dest) and open(dest).read() == contents)
if is_win32:
# generate exe file and give the script a magic name:
exe = script + '.exe'
open(exe, 'wb').write(
pkg_resources.resource_string('setuptools', 'cli.exe')
)
generated.append(exe)
if changed:
open(dest, 'w').write(contents)
try:
os.chmod(dest,0755)
except (AttributeError, os.error):
pass
logger.info("Generated interpreter %r.", script)
generated.append(dest)
return generated
return _write_script(dest, contents, 'interpreter')
py_script_template = script_header + '''\
......@@ -1255,9 +1200,9 @@ py_script_template = script_header + '''\
import sys
sys.path[0:0] = [
%(path)s,
]
%(import_site)s
%(path)s,
]
_interactive = True
if len(sys.argv) > 1:
_options, _args = __import__("getopt").getopt(sys.argv[1:], 'ic:m:')
......@@ -1284,6 +1229,267 @@ if _interactive:
__import__("code").interact(banner="", local=globals())
'''
# These are used only by the newer ``generate_scripts`` function.
def _get_system_paths(executable):
"""return lists of standard lib and site paths for executable.
"""
# We want to get a list of the site packages, which is not easy.
# The canonical way to do this is to use
# distutils.sysconfig.get_python_lib(), but that only returns a
# single path, which does not reflect reality for many system
# Pythons, which have multiple additions. Instead, we start Python
# with -S, which does not import site.py and set up the extra paths
# like site-packages or (Ubuntu/Debian) dist-packages and
# python-support. We then compare that sys.path with the normal one
# (minus user packages if this is Python 2.6, because we don't
# support those (yet?). The set of the normal one minus the set of
# the ones in ``python -S`` is the set of packages that are
# effectively site-packages.
#
# The given executable might not be the current executable, so it is
# appropriate to do another subprocess to figure out what the
# additional site-package paths are. Moreover, even if this
# executable *is* the current executable, this code might be run in
# the context of code that has manipulated the sys.path--for
# instance, to add local zc.buildout or setuptools eggs.
def get_sys_path(*args, **kwargs):
cmd = [executable]
cmd.extend(args)
cmd.extend([
"-c", "import sys, os;"
"print repr([os.path.normpath(p) for p in sys.path if p])"])
_proc = subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=kwargs)
stdout, stderr = _proc.communicate();
if _proc.returncode:
raise RuntimeError(
'error trying to get system packages:\n%s' % (stderr,))
res = eval(stdout)
try:
res.remove('.')
except ValueError:
pass
return res
stdlib = get_sys_path('-S') # stdlib only
no_user_paths = get_sys_path(PYTHONNOUSERSITE='x')
site_paths = [p for p in no_user_paths if p not in stdlib]
return (stdlib, site_paths)
def _get_module_file(executable, name):
"""Return a module's file path.
- executable is a path to the desired Python executable.
- name is the name of the (pure, not C) Python module.
"""
cmd = [executable, "-c",
"import imp; "
"fp, path, desc = imp.find_module(%r); "
"fp.close; "
"print path" % (name,)]
_proc = subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = _proc.communicate();
if _proc.returncode:
logger.info(
'Could not find file for module %s:\n%s', name, stderr)
return None
# else: ...
res = stdout.strip()
if res.endswith('.pyc') or res.endswith('.pyo'):
raise RuntimeError('Cannot find uncompiled version of %s' % (name,))
if not os.path.exists(res):
raise RuntimeError(
'File does not exist for module %s:\n%s' % (name, res))
return res
def _generate_sitecustomize(dest, executable, initialization='',
exec_sitecustomize=False):
"""Write a sitecustomize file with optional custom initialization.
The created script will execute the underlying Python's
sitecustomize if exec_sitecustomize is True.
"""
sitecustomize_path = os.path.join(dest, 'sitecustomize.py')
sitecustomize = open(sitecustomize_path, 'w')
if initialization:
sitecustomize.write(initialization + '\n')
if exec_sitecustomize:
real_sitecustomize_path = _get_module_file(
executable, 'sitecustomize')
if real_sitecustomize_path:
real_sitecustomize = open(real_sitecustomize_path, 'r')
sitecustomize.write(
'\n# The following is from\n# %s\n' %
(real_sitecustomize_path,))
sitecustomize.write(real_sitecustomize.read())
real_sitecustomize.close()
sitecustomize.close()
return sitecustomize_path
def _generate_site(dest, working_set, executable, extra_paths=(),
add_site_packages=False, relative_paths=False):
"""Write a site.py file with eggs from working_set.
extra_paths will be added to the path. If add_site_packages is True,
paths from the underlying Python will be added.
"""
path = _get_path(working_set, extra_paths)
site_path = os.path.join(dest, 'site.py')
path_string, rpsetup = _relative_path_and_setup(
site_path, path, relative_paths, indent_level=2)
if rpsetup:
rpsetup = '\n'.join(
[(line and ' %s' % (line,) or line)
for line in rpsetup.split('\n')])
real_site_path = _get_module_file(executable, 'site')
real_site = open(real_site_path, 'r')
site = open(site_path, 'w')
extra_path_snippet = add_site_packages_snippet[add_site_packages]
extra_path_snippet_followup = add_site_packages_snippet_followup[
add_site_packages]
if add_site_packages:
stdlib, site_paths = _get_system_paths(executable)
extra_path_snippet = extra_path_snippet % _format_paths(
(repr(p) for p in site_paths), 2)
addsitepackages_marker = 'def addsitepackages('
enableusersite_marker = 'ENABLE_USER_SITE = '
successful_rewrite = False
for line in real_site.readlines():
if line.startswith(enableusersite_marker):
site.write(enableusersite_marker)
site.write('False # buildout does not support user sites.\n')
elif line.startswith(addsitepackages_marker):
site.write(addsitepackages_script % (
extra_path_snippet, rpsetup, path_string,
extra_path_snippet_followup))
site.write(line[len(addsitepackages_marker):])
successful_rewrite = True
else:
site.write(line)
if not successful_rewrite:
raise RuntimeError('Buildout did not successfully rewrite site.py')
return site_path
add_site_packages_snippet = ['''
paths = []''', '''
paths = [ # These are the underlying Python's site-packages.
%s]
sys.path[0:0] = paths
known_paths.update([os.path.normcase(os.path.abspath(p)) for p in paths])
try:
import pkg_resources
except ImportError:
# No namespace packages in sys.path; no fixup needed.
pkg_resources = None''']
add_site_packages_snippet_followup = ['', '''
if pkg_resources is not None:
# There may be namespace packages in sys.path. This is much faster
# than importing pkg_resources after the sys.path has a large number
# of eggs.
for p in sys.path:
pkg_resources.fixup_namespace_packages(p)''']
addsitepackages_script = '''\
def addsitepackages(known_paths):%s
%s paths[0:0] = [ # eggs
%s
]
# Process all dirs. Look for .pth files. If they exist, defer
# processing "import" varieties.
dotpth = os.extsep + "pth"
deferred = []
for path in reversed(paths):
# Duplicating addsitedir.
sitedir, sitedircase = makepath(path)
if not sitedircase in known_paths and os.path.exists(sitedir):
sys.path.insert(0, sitedir)
known_paths.add(sitedircase)
try:
names = os.listdir(sitedir)
except os.error:
continue
names = [name for name in names if name.endswith(dotpth)]
names.sort()
for name in names:
# Duplicating addpackage.
fullname = os.path.join(sitedir, name)
try:
f = open(fullname, "rU")
except IOError:
continue
try:
for line in f:
if line.startswith("#"):
continue
if (line.startswith("import ") or
line.startswith("import\t")):
# This line is supposed to be executed. It
# might be a setuptools namespace package
# installed with a system package manager.
# Defer this so we can process egg namespace
# packages first, or else the eggs with the same
# namespace will be ignored.
deferred.append((sitedir, name, fullname, line))
continue
line = line.rstrip()
dir, dircase = makepath(sitedir, line)
if not dircase in known_paths and os.path.exists(dir):
sys.path.append(dir)
known_paths.add(dircase)
finally:
f.close()%s
# Process "import ..." .pth lines.
for sitedir, name, fullname, line in deferred:
# Note that some lines--such as the one setuptools writes for
# namespace packages--expect some or all of sitedir, name, and
# fullname to be present in the frame locals, as it is in
# ``addpackage``.
try:
exec line
except:
print "Error in %%s" %% (fullname,)
raise
global addsitepackages
addsitepackages = original_addsitepackages
return known_paths
buildout_addsitepackages = addsitepackages
def original_addsitepackages('''
def _generate_interpreter(name, dest, executable, site_py_dest,
relative_paths=False):
"""Write an interpreter script, using the site.py approach."""
full_name = os.path.join(dest, name)
site_py_dest_string, rpsetup = _relative_path_and_setup(
full_name, [site_py_dest], relative_paths)
contents = interpreter_template % dict(
python = _safe_arg(executable),
site_dest = site_py_dest_string,
relative_paths_setup = rpsetup,
)
return _write_script(full_name, contents, 'interpreter')
interpreter_template = script_header + '''\
%(relative_paths_setup)s
import os
import sys
argv = [sys.executable] + sys.argv[1:]
environ = os.environ.copy()
path = %(site_dest)s
if environ.get('PYTHONPATH'):
path = os.pathsep.join([path, environ['PYTHONPATH']])
environ['PYTHONPATH'] = path
os.execve(sys.executable, argv, environ)
'''
# End of script generation code.
############################################################################
runsetup_template = """
import sys
sys.path.insert(0, %(setupdir)r)
......
src/zc/buildout/easy_install.txt
View file @ bb152420
......@@ -521,25 +521,30 @@ To return the dependency_links behavior to normal call the function again.
Script generation
-----------------
The easy_install module provides support for creating scripts from
eggs. It provides a function similar to setuptools except that it
provides facilities for baking a script's path into the script. This
has two advantages:
The easy_install module provides support for creating scripts from eggs.
It provides two competing functions. Both are similar to setuptools
except that they provides facilities for baking a script's path into the
script. This has two advantages:
- The eggs to be used by a script are not chosen at run time, making
startup faster and, more importantly, deterministic.
- The script doesn't have to import pkg_resources because the logic
that pkg_resources would execute at run time is executed at
script-creation time.
- The script doesn't have to import pkg_resources because the logic that
pkg_resources would execute at run time is executed at script-creation
time. (There is an exception if you want to have your Python's site
packages available, as discussed below, but even in that case
pkg_resources is only partially activated.)
The scripts method can be used to generate scripts. Let's create a
destination directory for it to place them in:
The ``scripts`` function
~~~~~~~~~~~~~~~~~~~~~~~~
The ``scripts`` function is the first way to generate scripts that we'll
examine. It is the earlier approach that the package offered. Let's
create a destination directory for it to place them in:
>>> import tempfile
>>> bin = tmpdir('bin')
Now, we'll use the scripts method to generate scripts in this directory
Now, we'll use the scripts function to generate scripts in this directory
from the demo egg:
>>> import sys
......@@ -601,6 +606,15 @@ Some things to note:
- The module for the script entry point is imported and the entry
point, in this case, 'main', is run.
- On the shebang (first) line of the script, Python is invoked with -S.
This means that site.py is not imported, which in turn means that
site-packages are not part of the path. This is the safest approach,
and let's you easily use a system Python to do buildout-based
development. Note that, because of the setuptools-provided .exe files
that buildout uses to run scripts, it also works on Windows. (If you
want to use site-packages, see the discussion--and warnings--for the
``generate_scripts`` function, below.)
Rather than requirement strings, you can pass tuples containing 3
strings:
......@@ -635,42 +649,6 @@ Passing entry-point information directly is handy when using eggs (or
distributions) that don't declare their entry points, such as
distributions that aren't based on setuptools.
As you can see by the shebang (first) line of the script, Python is
invoked with -S. This means that site.py is not imported, which in turn
means that site-packages are not part of the path. This is the safest
approach, and let's you easily use a system Python to do buildout-based
development. Note that, because of the setuptools-provided .exe files
that buildout uses to run scripts, it also works on Windows.
However, if desired, you can also specify that site.py should be
imported, using the ``import_site`` argument. This is done carefully,
as you can see in the comment below.
>>> scripts = zc.buildout.easy_install.scripts(
... ['demo'], ws, sys.executable, bin, import_site=True)
>>> cat(bin, 'demo') # doctest: +NORMALIZE_WHITESPACE
#!/usr/local/bin/python2.4 -S
<BLANKLINE>
import sys
sys.path[0:0] = [
'/sample-install/demo-0.3-py2.4.egg',
'/sample-install/demoneeded-1.1-py2.4.egg',
]
# We have to import pkg_resources before namespace
# package .pth files are processed or else the distribution's namespace
# packages will mask all of the egg-based packages in the same namespace
# package.
try:
import pkg_resources
except ImportError:
pass
import site
<BLANKLINE>
import eggrecipedemo
<BLANKLINE>
if __name__ == '__main__':
eggrecipedemo.main()
The interpreter keyword argument can be used to generate a script that can
be used to invoke the Python interactive interpreter with the path set
based on the working set. This generated script can also be used to
......@@ -752,56 +730,6 @@ module:
>>> print system(join(bin, 'py')+' -m pdb what'),
Error: what does not exist
The interpreter script generation also honors the ``import_site`` argument
described above.
>>> scripts = zc.buildout.easy_install.scripts(
... ['demo'], ws, sys.executable, bin, interpreter='py',
... import_site=True)
>>> cat(bin, 'py') # doctest: +NORMALIZE_WHITESPACE
#!/usr/local/bin/python2.4 -S
<BLANKLINE>
import sys
<BLANKLINE>
sys.path[0:0] = [
'/sample-install/demo-0.3-pyN.N.egg',
'/sample-install/demoneeded-1.1-pyN.N.egg',
]
# We have to import pkg_resources before namespace
# package .pth files are processed or else the distribution's namespace
# packages will mask all of the egg-based packages in the same namespace
# package.
try:
import pkg_resources
except ImportError:
pass
import site
<BLANKLINE>
_interactive = True
if len(sys.argv) > 1:
_options, _args = __import__("getopt").getopt(sys.argv[1:], 'ic:m:')
_interactive = False
for (_opt, _val) in _options:
if _opt == '-i':
_interactive = True
elif _opt == '-c':
exec _val
elif _opt == '-m':
sys.argv[1:] = _args
_args = []
__import__("runpy").run_module(
_val, {}, "__main__", alter_sys=True)
<BLANKLINE>
if _args:
sys.argv[:] = _args
__file__ = _args[0]
del _options, _args
execfile(__file__)
<BLANKLINE>
if _interactive:
del _interactive
__import__("code").interact(banner="", local=globals())
An additional argument can be passed to define which scripts to install
and to provide script names. The argument is a dictionary mapping
original script names to new script names.
......@@ -822,8 +750,8 @@ original script names to new script names.
>>> print system(os.path.join(bin, 'run')),
3 1
Including extra paths in scripts
--------------------------------
The ``scripts`` function: Including extra paths in scripts
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We can pass a keyword argument, extra paths, to cause additional paths
to be included in the a generated script:
......@@ -848,8 +776,8 @@ to be included in the a generated script:
if __name__ == '__main__':
eggrecipedemo.main()
Providing script arguments
--------------------------
The ``scripts`` function: Providing script arguments
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
An "argument" keyword argument can be used to pass arguments to an
entry point. The value passed is a source string to be placed between the
......@@ -872,8 +800,8 @@ parentheses in the call:
if __name__ == '__main__':
eggrecipedemo.main(1, 2)
Passing initialization code
---------------------------
The ``scripts`` function: Passing initialization code
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You can also pass script initialization code:
......@@ -898,8 +826,8 @@ You can also pass script initialization code:
if __name__ == '__main__':
eggrecipedemo.main(1, 2)
Relative paths
--------------
The ``scripts`` function: Relative paths
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sometimes, you want to be able to move a buildout directory around and
have scripts still work without having to rebuild them. We can
......@@ -933,11 +861,11 @@ to pass a common base directory of the scripts and eggs:
<BLANKLINE>
import sys
sys.path[0:0] = [
join(base, 'eggs/demo-0.3-pyN.N.egg'),
join(base, 'eggs/demoneeded-1.1-pyN.N.egg'),
'/ba',
join(base, 'bar'),
]
join(base, 'eggs/demo-0.3-pyN.N.egg'),
join(base, 'eggs/demoneeded-1.1-pyN.N.egg'),
'/ba',
join(base, 'bar'),
]
<BLANKLINE>
<BLANKLINE>
import eggrecipedemo
......@@ -967,11 +895,11 @@ We specified an interpreter and its paths are adjusted too:
import sys
<BLANKLINE>
sys.path[0:0] = [
join(base, 'eggs/demo-0.3-pyN.N.egg'),
join(base, 'eggs/demoneeded-1.1-pyN.N.egg'),
'/ba',
join(base, 'bar'),
]
join(base, 'eggs/demo-0.3-pyN.N.egg'),
join(base, 'eggs/demoneeded-1.1-pyN.N.egg'),
'/ba',
join(base, 'bar'),
]
<BLANKLINE>
_interactive = True
if len(sys.argv) > 1:
......@@ -998,46 +926,75 @@ We specified an interpreter and its paths are adjusted too:
del _interactive
__import__("code").interact(banner="", local=globals())
The ``generate_scripts`` function
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Interpreter generation
----------------------
The newer function for creating scripts is ``generate_scripts``. It has the
same basic functionality as the ``scripts`` function: it can create scripts
to run arbitrary entry points, and to run a Python interpreter. The
following are the differences from a user's perspective.
The interpreter created above is a script that emulates the Python
interpreter. Sometimes it is useful to have a full-fledged Python interpreter
available. The ``interpreter`` function supports this.
- In contrast to the interpreter generated by the ``scripts`` method, which
supports only a small subset of the usual Python executable's options,
the interpreter generated by ``generate_scripts`` supports all of them.
This makes it possible to use as full Python replacement for scripts that
need the distributions specified in your buildout.
- Both the interpreter and the entry point scripts allow you to include the
site packages, and/or the sitecustomize, of the Python executable.
It works by creating site.py and sitecustomize.py files that set up the
desired paths and initialization. These must be placed within an otherwise
empty directory. Typically this is in a recipe's parts directory.
Here's the simplest example.
Here's the simplest example, building an interpreter script.
>>> interpreter_dir = tmpdir('interpreter')
>>> mkdir(interpreter_dir, 'bin')
>>> interpreter_parts_dir = os.path.join(
... interpreter_dir, 'parts', 'interpreter')
>>> interpreter_bin_dir = os.path.join(interpreter_dir, 'bin')
>>> mkdir(interpreter_bin_dir)
>>> mkdir(interpreter_dir, 'eggs')
>>> mkdir(interpreter_dir, 'parts')
>>> mkdir(interpreter_dir, 'parts', 'interpreter')
>>> mkdir(interpreter_parts_dir)
>>> ws = zc.buildout.easy_install.install(
... ['demo'], join(interpreter_dir, 'eggs'), links=[link_server],
... index=link_server+'index/')
>>> generated = zc.buildout.easy_install.interpreter(
... 'py', ws, sys.executable, join(interpreter_dir, 'bin'),
... join(interpreter_dir, 'parts', 'interpreter'))
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... interpreter='py')
Depending on whether the machine being used is running Windows or not, this
produces either three or four files. In both cases, we have site.py and
sitecustomize.py generated in the parts/interpreter directory. For Windows,
we have py.exe and py-script.py; for other operating systems, we have py.
>>> sitecustomize_path = os.path.join(
... interpreter_parts_dir, 'sitecustomize.py')
>>> site_path = os.path.join(interpreter_parts_dir, 'site.py')
>>> interpreter_path = os.path.join(interpreter_bin_dir, 'py')
>>> if sys.platform == 'win32':
... py_path = os.path.join(interpreter_bin_dir, 'py-script.py')
... expected = [sitecustomize_path,
... site_path,
... os.path.join(interpreter_bin_dir, 'py.exe'),
... py_path]
... else:
... py_path = interpreter_path
... expected = [sitecustomize_path, site_path, py_path]
...
>>> assert generated == expected, repr((generated, expected))
On non-Windows systems, this creates three files.
We didn't ask for any initialization, and we didn't ask to use the underlying
sitecustomization, so sitecustomize.py is empty.
>>> len(generated)
3
>>> import pprint
>>> pprint.pprint(sorted(generated))
['/interpreter/bin/py',
'/interpreter/parts/interpreter/site.py',
'/interpreter/parts/interpreter/sitecustomize.py']
>>> cat(sitecustomize_path)
These are the three generated files.
The interpreter script is simple. It puts the directory with the
site.py and sitecustomize.py on the PYTHONPATH and (re)starts Python.
>>> cat(interpreter_dir, 'bin', 'py')
>>> cat(py_path)
#!/usr/bin/python2.4 -S
<BLANKLINE>
import os
......@@ -1050,29 +1007,102 @@ These are the three generated files.
path = os.pathsep.join([path, environ['PYTHONPATH']])
environ['PYTHONPATH'] = path
os.execve(sys.executable, argv, environ)
>>> ls(interpreter_dir, 'parts', 'interpreter')
- site.py
- sitecustomize.py
>>> cat(interpreter_dir, 'parts', 'interpreter', 'site.py')
import sys
sys.path[0:0] = [
'/interpreter/eggs/demo-0.3-py2.4.egg',
'/interpreter/eggs/demoneeded-1.1-py2.4.egg',
]
import sitecustomize
>>> cat(interpreter_dir, 'parts', 'interpreter', 'sitecustomize.py')
The site.py file is a modified version of the underlying Python's site.py.
The most important modification is that it has a different version of the
addsitepackages function. It has all of the trickier bits, and sets up the
Python path, similarly to the behavior of the function it replaces. The
following shows the part that buildout inserts.
>>> sys.stdout.write('#\n'); cat(site_path)
... # doctest: +ELLIPSIS +NORMALIZE_WHITESPACE
#...
def addsitepackages(known_paths):
paths = []
paths[0:0] = [ # eggs
'/interpreter/eggs/demo-0.3-pyN.N.egg',
'/interpreter/eggs/demoneeded-1.1-pyN.N.egg'
]
# Process all dirs. Look for .pth files. If they exist, defer
# processing "import" varieties.
dotpth = os.extsep + "pth"
deferred = []
for path in reversed(paths):
# Duplicating addsitedir.
sitedir, sitedircase = makepath(path)
if not sitedircase in known_paths and os.path.exists(sitedir):
sys.path.insert(0, sitedir)
known_paths.add(sitedircase)
try:
names = os.listdir(sitedir)
except os.error:
continue
names = [name for name in names if name.endswith(dotpth)]
names.sort()
for name in names:
# Duplicating addpackage.
fullname = os.path.join(sitedir, name)
try:
f = open(fullname, "rU")
except IOError:
continue
try:
for line in f:
if line.startswith("#"):
continue
if (line.startswith("import ") or
line.startswith("import ")):
# This line is supposed to be executed. It
# might be a setuptools namespace package
# installed with a system package manager.
# Defer this so we can process egg namespace
# packages first, or else the eggs with the same
# namespace will be ignored.
deferred.append((sitedir, name, fullname, line))
continue
line = line.rstrip()
dir, dircase = makepath(sitedir, line)
if not dircase in known_paths and os.path.exists(dir):
sys.path.append(dir)
known_paths.add(dircase)
finally:
f.close()
# Process "import ..." .pth lines.
for sitedir, name, fullname, line in deferred:
# Note that some lines--such as the one setuptools writes for
# namespace packages--expect some or all of sitedir, name, and
# fullname to be present in the frame locals, as it is in
# ``addpackage``.
try:
exec line
except:
print "Error in %s" % (fullname,)
raise
global addsitepackages
addsitepackages = original_addsitepackages
return known_paths
<BLANKLINE>
buildout_addsitepackages = addsitepackages
<BLANKLINE>
def original_addsitepackages(known_paths):...
As you can see, it manipulates the path to insert the eggs and then processes
any .pth files. The lines in the .pth files that use the "import" feature
are deferred because it is a pattern we will need in a later example, when we
show how we can add site packages, and handle competing namespace packages
in both site packages and eggs.
Here are some examples of the interpreter in use.
>>> print system(join(interpreter_dir, 'bin', 'py') + ' -c "print 16+26"')
>>> print system(interpreter_path + ' -c "print 16+26"')
42
<BLANKLINE>
>>> res = system(join(interpreter_dir, 'bin', 'py') +
>>> res = system(interpreter_path +
... ' -c "import sys, pprint; pprint.pprint(sys.path)"')
>>> print res # doctest: +ELLIPSIS
['',
'/interpreter/eggs/demo-0.3-py2.4.egg',
'/interpreter/eggs/demoneeded-1.1-py2.4.egg',
'/interpreter/eggs/demo-0.3-pyN.N.egg',
'/interpreter/eggs/demoneeded-1.1-pyN.N.egg',
'/interpreter/parts/interpreter',
...]
<BLANKLINE>
......@@ -1083,24 +1113,23 @@ If you provide initialization, it goes in sitecustomize.py.
>>> def reset_interpreter():
... # This is necessary because, in our tests, the timestamps of the
... # .pyc files are not outdated when we want them to be.
... rmdir(interpreter_dir, 'bin')
... mkdir(interpreter_dir, 'bin')
... rmdir(interpreter_dir, 'parts', 'interpreter')
... mkdir(interpreter_dir, 'parts', 'interpreter')
... rmdir(interpreter_bin_dir)
... mkdir(interpreter_bin_dir)
... rmdir(interpreter_parts_dir)
... mkdir(interpreter_parts_dir)
...
>>> reset_interpreter()
>>> initialization_string = """\
... import os
... os.environ['FOO'] = 'bar baz bing shazam'"""
>>> generated = zc.buildout.easy_install.interpreter(
... 'py', ws, sys.executable, join(interpreter_dir, 'bin'),
... join(interpreter_dir, 'parts', 'interpreter'),
... initialization=initialization_string)
>>> cat(interpreter_dir, 'parts', 'interpreter', 'sitecustomize.py')
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... interpreter='py', initialization=initialization_string)
>>> cat(sitecustomize_path)
import os
os.environ['FOO'] = 'bar baz bing shazam'
>>> print system(join(interpreter_dir, 'bin', 'py') +
>>> print system(interpreter_path +
... """ -c 'import os; print os.environ["FOO"]'""")
bar baz bing shazam
<BLANKLINE>
......@@ -1108,11 +1137,10 @@ If you provide initialization, it goes in sitecustomize.py.
If you use relative paths, this affects the interpreter and site.py.
>>> reset_interpreter()
>>> generated = zc.buildout.easy_install.interpreter(
... 'py', ws, sys.executable, join(interpreter_dir, 'bin'),
... join(interpreter_dir, 'parts', 'interpreter'),
... relative_paths=interpreter_dir)
>>> cat(interpreter_dir, 'bin', 'py')
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... interpreter='py', relative_paths=interpreter_dir)
>>> cat(py_path)
#!/usr/bin/python2.4 -S
<BLANKLINE>
import os
......@@ -1131,21 +1159,30 @@ If you use relative paths, this affects the interpreter and site.py.
path = os.pathsep.join([path, environ['PYTHONPATH']])
environ['PYTHONPATH'] = path
os.execve(sys.executable, argv, environ)
>>> cat(interpreter_dir, 'parts', 'interpreter', 'site.py')
For site.py, we again show only the pertinent parts. Notice that the egg
paths join a base to a path, as with the use of this argument in the
``scripts`` function.
>>> sys.stdout.write('#\n'); cat(site_path) # doctest: +ELLIPSIS
#...
def addsitepackages(known_paths):
paths = []
<BLANKLINE>
import os
import os
<BLANKLINE>
join = os.path.join
base = os.path.dirname(os.path.abspath(os.path.realpath(__file__)))
base = os.path.dirname(base)
base = os.path.dirname(base)
import sys
sys.path[0:0] = [
join(base, 'eggs/demo-0.3-pyN.N.egg'),
join(base, 'eggs/demoneeded-1.1-pyN.N.egg'),
]
import sitecustomize
>>> print system(join(interpreter_dir, 'bin', 'py') +
join = os.path.join
base = os.path.dirname(os.path.abspath(os.path.realpath(__file__)))
base = os.path.dirname(base)
base = os.path.dirname(base)
paths[0:0] = [ # eggs
join(base, 'eggs/demo-0.3-pyN.N.egg'),
join(base, 'eggs/demoneeded-1.1-pyN.N.egg')
]...
The paths resolve in practice as you would expect.
>>> print system(interpreter_path +
... ' -c "import sys, pprint; pprint.pprint(sys.path)"')
... # doctest: +ELLIPSIS
['',
......@@ -1155,61 +1192,176 @@ If you use relative paths, this affects the interpreter and site.py.
...]
<BLANKLINE>
The ``extra_paths`` argument affects the path in site.py.
The ``extra_paths`` argument affects the path in site.py. Notice that
/interpreter/other is added after the eggs.
>>> reset_interpreter()
>>> generated = zc.buildout.easy_install.interpreter(
... 'py', ws, sys.executable, join(interpreter_dir, 'bin'),
... join(interpreter_dir, 'parts', 'interpreter'),
... extra_paths=[join(interpreter_dir, 'other')])
>>> cat(interpreter_dir, 'parts', 'interpreter', 'site.py')
import sys
sys.path[0:0] = [
'/interpreter/eggs/demo-0.3-py2.4.egg',
'/interpreter/eggs/demoneeded-1.1-py2.4.egg',
'/interpreter/other',
]
import sitecustomize
>>> print system(join(interpreter_dir, 'bin', 'py') +
>>> mkdir(interpreter_dir, 'other')
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... interpreter='py', extra_paths=[join(interpreter_dir, 'other')])
>>> sys.stdout.write('#\n'); cat(site_path) # doctest: +ELLIPSIS
#...
def addsitepackages(known_paths):
paths = []
paths[0:0] = [ # eggs
'/interpreter/eggs/demo-0.3-pyN.N.egg',
'/interpreter/eggs/demoneeded-1.1-pyN.N.egg',
'/interpreter/other'
]...
>>> print system(interpreter_path +
... ' -c "import sys, pprint; pprint.pprint(sys.path)"')
... # doctest: +ELLIPSIS
['',
'/interpreter/eggs/demo-0.3-py2.4.egg',
'/interpreter/eggs/demoneeded-1.1-py2.4.egg',
'/interpreter/eggs/demo-0.3-pyN.N.egg',
'/interpreter/eggs/demoneeded-1.1-pyN.N.egg',
'/interpreter/other',
'/interpreter/parts/interpreter',
...]
<BLANKLINE>
The ``import_site`` argument also affects site.py. It causes the executable's
real site.py to be executed after our customizations have run.
The ``generate_scripts`` function: using site-packages
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The ``generate_scripts`` function supports including site packages. This has
some advantages and some serious dangers.
A typical reason to include site-packages is that it is easier to
install one or more dependencies in your Python than it is with
buildbot. Some packages, such as lxml or Python PostgreSQL integration,
have dependencies that can be much easier to build and/or install using
other mechanisms, such as your operating system's package manager. By
installing some core packages into your Python's site-packages, this can
significantly simplify some application installations.
However, doing this has a significant danger. One of the primary goals
of buildout is to provide repeatability. Some packages (one of the
better known Python openid packages, for instance) change their behavior
depending on what packages are available. If Python curl bindings are
available, these may be preferred by the library. If a certain XML
package is installed, it may be preferred by the library. These hidden
choices may cause small or large behavior differences. The fact that
they can be rarely encountered can actually make it worse: you forget
that this might be a problem, and debugging the differences can be
difficult. If you allow site-packages to be included in your buildout,
and the Python you use is not managed precisely by your application (for
instance, it is a system Python), you open yourself up to these
possibilities. Don't be unaware of the dangers.
That explained, let's see how it works. Unfortunately, because of how
setuptools namespace packages are implemented differently for operating
system packages (debs or rpms) and normal installation, there's a tricky
dance.
>>> reset_interpreter()
>>> generated = zc.buildout.easy_install.interpreter(
... 'py', ws, sys.executable, join(interpreter_dir, 'bin'),
... join(interpreter_dir, 'parts', 'interpreter'),
... import_site=True)
>>> cat(interpreter_dir, 'parts', 'interpreter', 'site.py')
import sys
sys.path[0:0] = [
'/interpreter/eggs/demo-0.3-py2.4.egg',
'/interpreter/eggs/demoneeded-1.1-py2.4.egg',
]
# We have to import pkg_resources before namespace
# package .pth files are processed or else the distribution's namespace
# packages will mask all of the egg-based packages in the same namespace
# package.
try:
import pkg_resources
except ImportError:
pass
execfile('/usr/lib/python/site.py')
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... interpreter='py', add_site_packages=True)
>>> sys.stdout.write('#\n'); cat(site_path)
... # doctest: +ELLIPSIS +NORMALIZE_WHITESPACE
#...
def addsitepackages(known_paths):
paths = [ # These are the underlying Python's site-packages.
'...']
sys.path[0:0] = paths
known_paths.update([os.path.normcase(os.path.abspath(p)) for p in paths])
try:
import pkg_resources
except ImportError:
# No namespace packages in sys.path; no fixup needed.
pkg_resources = None
paths[0:0] = [ # eggs
'/interpreter/eggs/demo-0.3-pyN.N.egg',
'/interpreter/eggs/demoneeded-1.1-pyN.N.egg'
]
# Process all dirs. Look for .pth files. If they exist, defer
# processing "import" varieties.
dotpth = os.extsep + "pth"
deferred = []
for path in reversed(paths):
# Duplicating addsitedir.
sitedir, sitedircase = makepath(path)
if not sitedircase in known_paths and os.path.exists(sitedir):
sys.path.insert(0, sitedir)
known_paths.add(sitedircase)
try:
names = os.listdir(sitedir)
except os.error:
continue
names = [name for name in names if name.endswith(dotpth)]
names.sort()
for name in names:
# Duplicating addpackage.
fullname = os.path.join(sitedir, name)
try:
f = open(fullname, "rU")
except IOError:
continue
try:
for line in f:
if line.startswith("#"):
continue
if (line.startswith("import ") or
line.startswith("import ")):
# This line is supposed to be executed. It
# might be a setuptools namespace package
# installed with a system package manager.
# Defer this so we can process egg namespace
# packages first, or else the eggs with the same
# namespace will be ignored.
deferred.append((sitedir, name, fullname, line))
continue
line = line.rstrip()
dir, dircase = makepath(sitedir, line)
if not dircase in known_paths and os.path.exists(dir):
sys.path.append(dir)
known_paths.add(dircase)
finally:
f.close()
if pkg_resources is not None:
# There may be namespace packages in sys.path. This is much faster
# than importing pkg_resources after the sys.path has a large number
# of eggs.
for p in sys.path:
pkg_resources.fixup_namespace_packages(p)
# Process "import ..." .pth lines.
for sitedir, name, fullname, line in deferred:
# Note that some lines--such as the one setuptools writes for
# namespace packages--expect some or all of sitedir, name, and
# fullname to be present in the frame locals, as it is in
# ``addpackage``.
try:
exec line
except:
print "Error in %s" % (fullname,)
raise
global addsitepackages
addsitepackages = original_addsitepackages
return known_paths
<BLANKLINE>
buildout_addsitepackages = addsitepackages
<BLANKLINE>
def original_addsitepackages(known_paths):...
As you can see, the script now first tries to import pkg_resources. If it
exists, then we need to process egg files specially to look for namespace
packages there *before* we process process lines in .pth files that use the
"import" feature--lines that might be part of the setuptools namespace
package implementation for system packages, as mentioned above, and that
must come after processing egg namespaces.
Here's an example of the new script in use. Other documents and tests in
this package give the feature a more thorough workout, but this should
give you an idea of the feature.
>>> res = system(join(interpreter_dir, 'bin', 'py') +
... ' -c "import sys, pprint; pprint.pprint(sys.path)"')
>>> print res # doctest: +ELLIPSIS
['',
'/interpreter/eggs/demo-0.3-py2.4.egg',
'/interpreter/eggs/demoneeded-1.1-py2.4.egg',
'...',
'/interpreter/parts/interpreter',
...]
<BLANKLINE>
......@@ -1219,12 +1371,106 @@ The clean_paths gathered earlier is a subset of this full list of paths.
>>> full_paths = eval(res.strip())
>>> len(clean_paths) < len(full_paths)
True
>>> set(os.path.normpath(p) for p in clean_paths).difference(
>>> set(os.path.normpath(p) for p in clean_paths).issubset(
... os.path.normpath(p) for p in full_paths)
set([])
True
The ``exec_sitecustomize`` argument does the same thing for the
sitecustomize module--it allows you to include the code from the
sitecustomize module in the underlying Python if you set the argument to
True. The z3c.recipe.scripts package sets up the full environment necessary
to demonstrate this piece.
The ``generate_scripts`` function: writing scripts for entry points
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
All of the examples so far for this function have been creating
interpreters. The function can also write scripts for entry
points. They are almost identical to the scripts that we saw for the
``scripts`` function except that they ``import site`` after setting the
sys.path to include our custom site.py and sitecustomize.py files. These
files then initialize the Python environment as we have already seen. Let's
see a simple example.
>>> reset_interpreter()
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... reqs=['demo'])
As before, in Windows, 2 files are generated for each script. A script
file, ending in '-script.py', and an exe file that allows the script
to be invoked directly without having to specify the Python
interpreter and without having to provide a '.py' suffix. This is in addition
to the site.py and sitecustomize.py files that are generated as with our
interpreter examples above.
>>> if sys.platform == 'win32':
... demo_path = os.path.join(interpreter_bin_dir, 'demo-script.py')
... expected = [sitecustomize_path,
... site_path,
... os.path.join(interpreter_bin_dir, 'demo.exe'),
... demo_path]
... else:
... demo_path = os.path.join(interpreter_bin_dir, 'demo')
... expected = [sitecustomize_path, site_path, demo_path]
...
>>> assert generated == expected, repr((generated, expected))
The demo script runs the entry point defined in the demo egg:
>>> cat(demo_path) # doctest: +NORMALIZE_WHITESPACE
#!/usr/local/bin/python2.4 -S
<BLANKLINE>
import sys
sys.path[0:0] = [
'/interpreter/parts/interpreter',
]
<BLANKLINE>
<BLANKLINE>
import site # imports custom buildbot-generated site.py
<BLANKLINE>
import eggrecipedemo
<BLANKLINE>
if __name__ == '__main__':
eggrecipedemo.main()
The ``import_sitecustomize`` argument does the same thing for the
sitecustomize module.
>>> print system(join(interpreter_bin_dir, 'demo'))
3 1
<BLANKLINE>
There are a few differences from the ``scripts`` function. First, the
``reqs`` argument (an iterable of string requirements or entry point
tuples) is a keyword argument here. We see that in the example above.
Second, the ``arguments`` argument is now named ``script_arguments`` to
try and clarify that it does not affect interpreters. While the
``initialization`` argument continues to affect both the interpreters
and the entry point scripts, if you have initialization that is only
pertinent to the entry point scripts, you can use the
``script_initialization`` argument.
Let's see ``script_arguments`` and ``script_initialization`` in action.
>>> reset_interpreter()
>>> generated = zc.buildout.easy_install.generate_scripts(
... interpreter_bin_dir, ws, sys.executable, interpreter_parts_dir,
... reqs=['demo'], script_arguments='1, 2',
... script_initialization='import os\nos.chdir("foo")')
>>> cat(demo_path) # doctest: +NORMALIZE_WHITESPACE
#!/usr/local/bin/python2.4 -S
import sys
sys.path[0:0] = [
'/interpreter/parts/interpreter',
]
<BLANKLINE>
import site # imports custom buildbot-generated site.py
import os
os.chdir("foo")
<BLANKLINE>
import eggrecipedemo
<BLANKLINE>
if __name__ == '__main__':
eggrecipedemo.main(1, 2)
Handling custom build options for extensions provided in source distributions
-----------------------------------------------------------------------------
......
src/zc/buildout/testing.py
View file @ bb152420
......@@ -117,7 +117,12 @@ def _runsetup(setup, executable, *args):
args = [zc.buildout.easy_install._safe_arg(arg)
for arg in args]
args.insert(0, '-q')
args.append(dict(os.environ, PYTHONPATH=setuptools_location))
env = dict(os.environ)
if executable == sys.executable:
env['PYTHONPATH'] = setuptools_location
# else pass an executable that has setuptools! See testselectingpython.py.
args.append(env)
here = os.getcwd()
try:
......@@ -136,6 +141,11 @@ def sdist(setup, dest):
def bdist_egg(setup, executable, dest):
_runsetup(setup, executable, 'bdist_egg', '-d', dest)
def sys_install(setup, dest):
_runsetup(setup, sys.executable, 'install', '--install-purelib', dest,
'--record', os.path.join(dest, '__added_files__'),
'--single-version-externally-managed')
def find_python(version):
e = os.environ.get('PYTHON%s' % version)
if e is not None:
......@@ -295,12 +305,15 @@ def buildoutSetUp(test):
' ' + line for line in initialization.split('\n'))
install_develop(
'zc.recipe.egg', os.path.join(buildout, 'develop-eggs'))
install_develop(
'z3c.recipe.scripts', os.path.join(buildout, 'develop-eggs'))
write('buildout.cfg', textwrap.dedent('''\
[buildout]
parts = py
[py]
recipe = zc.recipe.egg:interpreter
recipe = z3c.recipe.scripts
interpreter = py
initialization =
%(initialization)s
extra-paths = %(site-packages)s
......
src/zc/buildout/tests.py
View file @ bb152420
......@@ -53,6 +53,7 @@ We should be able to deal with setup scripts that aren't setuptools based.
>>> ls('develop-eggs')
- foo.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
"""
......@@ -84,6 +85,7 @@ We should be able to deal with setup scripts that aren't setuptools based.
>>> ls('develop-eggs')
- foo.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
>>> print system(join('bin', 'buildout')+' -vvv'), # doctest: +ELLIPSIS
......@@ -668,6 +670,7 @@ Create a develop egg:
>>> ls('develop-eggs')
- foox.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
Create another:
......@@ -692,6 +695,7 @@ Create another:
>>> ls('develop-eggs')
- foox.egg-link
- fooy.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
Remove one:
......@@ -709,6 +713,7 @@ It is gone
>>> ls('develop-eggs')
- fooy.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
Remove the other:
......@@ -723,6 +728,7 @@ Remove the other:
All gone
>>> ls('develop-eggs')
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
'''
......@@ -797,6 +803,7 @@ On the other hand, if we have a regular egg, rather than a develop egg:
... + join(sample_buildout, 'eggs'))
>>> ls('develop-eggs')
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
>>> ls('eggs') # doctest: +ELLIPSIS
......@@ -1769,6 +1776,240 @@ def bug_105081_Specific_egg_versions_are_ignored_when_newer_eggs_are_around():
1 2
"""
def versions_section_ignored_for_dependency_in_favor_of_site_packages():
r"""
This is a test for a bugfix.
The error showed itself when at least two dependencies were in a shared
location like site-packages, and the first one met the "versions" setting. The
first dependency would be added, but subsequent dependencies from the same
location (e.g., site-packages) would use the version of the package found in
the shared location, ignoring the version setting.
We begin with a Python that has demoneeded version 1.1 installed and a
demo version 0.3, all in a site-packages-like shared directory. We need
to create this. ``eggrecipedemo.main()`` shows the number after the dot
(that is, ``X`` in ``1.X``), for the demo package and the demoneeded
package, so this demonstrates that our Python does in fact have demo
version 0.3 and demoneeded version 1.1.
>>> py_path = make_py_with_system_install(make_py, sample_eggs)
>>> print system(
... py_path + " -c '" +
... "import tellmy.version\n" +
... "print tellmy.version.__version__\n" +
... "'"),
1.1
Now here's a setup that would expose the bug, using the
zc.buildout.easy_install API.
>>> example_dest = tmpdir('example_dest')
>>> workingset = zc.buildout.easy_install.install(
... ['tellmy.version'], example_dest, links=[sample_eggs],
... executable=py_path,
... index=None,
... versions={'tellmy.version': '1.0'})
>>> for dist in workingset:
... res = str(dist)
... if res.startswith('tellmy.version'):
... print res
... break
tellmy.version 1.0
Before the bugfix, the desired tellmy.version distribution would have
been blocked the one in site-packages.
"""
def handle_namespace_package_in_both_site_packages_and_buildout_eggs():
r"""
If you have the same namespace package in both site-packages and in
buildout, we need to be very careful that faux-Python-executables and
scripts generated by easy_install.generate_scripts correctly combine the two.
We show this with the local recipe that uses the function, z3c.recipe.scripts.
To demonstrate this, we will create three packages: tellmy.version 1.0,
tellmy.version 1.1, and tellmy.fortune 1.0. tellmy.version 1.1 is installed.
>>> py_path = make_py_with_system_install(make_py, sample_eggs)
>>> print system(
... py_path + " -c '" +
... "import tellmy.version\n" +
... "print tellmy.version.__version__\n" +
... "'")
1.1
<BLANKLINE>
Now we will create a buildout that creates a script and a faux-Python script.
We want to see that both can successfully import the specified versions of
tellmy.version and tellmy.fortune.
>>> write('buildout.cfg',
... '''
... [buildout]
... parts = eggs
... find-links = %(link_server)s
...
... [primed_python]
... executable = %(py_path)s
...
... [eggs]
... recipe = z3c.recipe.scripts
... python = primed_python
... interpreter = py
... add-site-packages = true
... eggs = tellmy.version == 1.0
... tellmy.fortune == 1.0
... demo
... script-initialization =
... import tellmy.version
... print tellmy.version.__version__
... import tellmy.fortune
... print tellmy.fortune.__version__
... ''' % globals())
>>> print system(buildout)
Installing eggs.
Getting distribution for 'tellmy.version==1.0'.
Got tellmy.version 1.0.
Getting distribution for 'tellmy.fortune==1.0'.
Got tellmy.fortune 1.0.
Getting distribution for 'demo'.
Got demo 0.4c1.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated script '/sample-buildout/bin/demo'.
Generated interpreter '/sample-buildout/bin/py'.
<BLANKLINE>
Finally, we are ready for the actual test. Prior to the bug fix that
this tests, the results of both calls below was the following::
1.1
Traceback (most recent call last):
...
ImportError: No module named fortune
<BLANKLINE>
In other words, we got the site-packages version of tellmy.version, and
we could not import tellmy.fortune at all. The following are the correct
results for the interpreter and for the script.
>>> print system(
... join('bin', 'py') + " -c '" +
... "import tellmy.version\n" +
... "print tellmy.version.__version__\n" +
... "import tellmy.fortune\n" +
... "print tellmy.fortune.__version__\n" +
... "'")
1.0
1.0
<BLANKLINE>
>>> print system(join('bin', 'demo'))
1.0
1.0
4 2
<BLANKLINE>
"""
def handle_sys_path_version_hack():
r"""
This is a test for a bugfix.
If you use a Python that has a different version of one of your
dependencies, and the new package tries to do sys.path tricks in the
setup.py to get a __version__, and it uses namespace packages, the older
package will be loaded first, making the setup version the wrong number.
While very arguably packages simply shouldn't do this, some do, and we
don't want buildout to fall over when they do.
To demonstrate this, we will need to create a distribution that has one of
these unpleasant tricks, and a Python that has an older version installed.
>>> py_path, site_packages_path = make_py()
>>> for version in ('1.0', '1.1'):
... tmp = tempfile.mkdtemp()
... try:
... write(tmp, 'README.txt', '')
... mkdir(tmp, 'src')
... mkdir(tmp, 'src', 'tellmy')
... write(tmp, 'src', 'tellmy', '__init__.py',
... "__import__("
... "'pkg_resources').declare_namespace(__name__)\n")
... mkdir(tmp, 'src', 'tellmy', 'version')
... write(tmp, 'src', 'tellmy', 'version',
... '__init__.py', '__version__=%r\n' % version)
... write(
... tmp, 'setup.py',
... "from setuptools import setup\n"
... "import sys\n"
... "sys.path.insert(0, 'src')\n"
... "from tellmy.version import __version__\n"
... "setup(\n"
... " name='tellmy.version',\n"
... " package_dir = {'': 'src'},\n"
... " packages = ['tellmy', 'tellmy.version'],\n"
... " install_requires = ['setuptools'],\n"
... " namespace_packages=['tellmy'],\n"
... " zip_safe=True, version=__version__,\n"
... " author='bob', url='bob', author_email='bob')\n"
... )
... zc.buildout.testing.sdist(tmp, sample_eggs)
... if version == '1.0':
... # We install the 1.0 version in site packages the way a
... # system packaging system (debs, rpms) would do it.
... zc.buildout.testing.sys_install(tmp, site_packages_path)
... finally:
... shutil.rmtree(tmp)
>>> print system(
... py_path + " -c '" +
... "import tellmy.version\n" +
... "print tellmy.version.__version__\n" +
... "'")
1.0
<BLANKLINE>
>>> write('buildout.cfg',
... '''
... [buildout]
... parts = eggs
... find-links = %(sample_eggs)s
...
... [primed_python]
... executable = %(py_path)s
...
... [eggs]
... recipe = zc.recipe.egg:eggs
... python = primed_python
... eggs = tellmy.version == 1.1
... ''' % globals())
Before the bugfix, running this buildout would generate this error:
Installing eggs.
Getting distribution for 'tellmy.version==1.1'.
Installing tellmy.version 1.1
Caused installation of a distribution:
tellmy.version 1.0
with a different version.
Got None.
While:
Installing eggs.
Error: There is a version conflict.
We already have: tellmy.version 1.0
<BLANKLINE>
The bugfix was simply to add Python's "-S" option when calling
easyinstall (see zc.buildout.easy_install.Installer._call_easy_install).
Now the install works correctly, as seen here.
>>> print system(buildout)
Installing eggs.
Getting distribution for 'tellmy.version==1.1'.
Got tellmy.version 1.1.
<BLANKLINE>
"""
if sys.version_info > (2, 4):
def test_exit_codes():
"""
......@@ -2367,6 +2608,7 @@ Distribution setup scripts can import modules in the distribution directory:
>>> ls('develop-eggs')
- foo.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
"""
......@@ -2654,6 +2896,44 @@ def increment_on_command_line():
######################################################################
def make_py_with_system_install(make_py, sample_eggs):
from zc.buildout.testing import write, mkdir
py_path, site_packages_path = make_py()
for pkg, version in (('version', '1.0'), ('version', '1.1'),
('fortune', '1.0')):
tmp = tempfile.mkdtemp()
try:
write(tmp, 'README.txt', '')
mkdir(tmp, 'src')
mkdir(tmp, 'src', 'tellmy')
write(tmp, 'src', 'tellmy', '__init__.py',
"__import__("
"'pkg_resources').declare_namespace(__name__)\n")
mkdir(tmp, 'src', 'tellmy', pkg)
write(tmp, 'src', 'tellmy', pkg,
'__init__.py', '__version__=%r\n' % version)
write(
tmp, 'setup.py',
"from setuptools import setup\n"
"setup(\n"
" name='tellmy.%(pkg)s',\n"
" package_dir = {'': 'src'},\n"
" packages = ['tellmy', 'tellmy.%(pkg)s'],\n"
" install_requires = ['setuptools'],\n"
" namespace_packages=['tellmy'],\n"
" zip_safe=True, version=%(version)r,\n"
" author='bob', url='bob', author_email='bob')\n"
% locals()
)
zc.buildout.testing.sdist(tmp, sample_eggs)
if pkg == 'version' and version == '1.1':
# We install the 1.1 version in site packages the way a
# system packaging system (debs, rpms) would do it.
zc.buildout.testing.sys_install(tmp, site_packages_path)
finally:
shutil.rmtree(tmp)
return py_path
def create_sample_eggs(test, executable=sys.executable):
write = test.globs['write']
dest = test.globs['sample_eggs']
......@@ -2776,6 +3056,7 @@ def easy_install_SetUp(test):
test.globs['sample_eggs'])
test.globs['update_extdemo'] = lambda : add_source_dist(test, 1.5)
zc.buildout.testing.install_develop('zc.recipe.egg', test)
zc.buildout.testing.install_develop('z3c.recipe.scripts', test)
egg_parse = re.compile('([0-9a-zA-Z_.]+)-([0-9a-zA-Z_.]+)-py(\d[.]\d).egg$'
).match
......@@ -2933,8 +3214,7 @@ def test_suite():
(re.compile('extdemo[.]pyd'), 'extdemo.so'),
(re.compile('[-d] setuptools-\S+[.]egg'), 'setuptools.egg'),
(re.compile(r'\\[\\]?'), '/'),
(re.compile('''execfile\(['"].+site.py['"]\)'''),
"execfile('/usr/lib/python/site.py')"),
(re.compile(r'\#!\S+\bpython\S*'), '#!/usr/bin/python'),
]+(sys.version_info < (2, 5) and [
(re.compile('.*No module named runpy.*', re.S), ''),
(re.compile('.*usage: pdb.py scriptfile .*', re.S), ''),
......
src/zc/buildout/testselectingpython.py
View file @ bb152420
......@@ -11,7 +11,7 @@
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
import os, re, sys, unittest
import os, re, subprocess, sys, textwrap, unittest
from zope.testing import doctest, renormalizing
import zc.buildout.tests
import zc.buildout.testing
......@@ -43,6 +43,33 @@ We can specify a specific Python executable.
def multi_python(test):
other_executable = zc.buildout.testing.find_python(other_version)
command = textwrap.dedent('''\
try:
import setuptools
except ImportError:
import sys
sys.exit(1)
''')
if subprocess.call([other_executable, '-c', command],
env=os.environ):
# the other executable does not have setuptools. Get setuptools.
# We will do this using the same tools we are testing, for better or
# worse. Alternatively, we could try using bootstrap.
executable_dir = test.globs['tmpdir']('executable_dir')
executable_parts = os.path.join(executable_dir, 'parts')
test.globs['mkdir'](executable_parts)
ws = zc.buildout.easy_install.install(
['setuptools'], executable_dir,
index='http://www.python.org/pypi/',
always_unzip=True, executable=other_executable)
zc.buildout.easy_install.generate_scripts(
executable_dir, ws, other_executable, executable_parts,
reqs=['setuptools'], interpreter='py')
original_executable = other_executable
other_executable = os.path.join(executable_dir, 'py')
assert not subprocess.call(
[other_executable, '-c', command], env=os.environ), (
'test set up failed')
sample_eggs = test.globs['tmpdir']('sample_eggs')
os.mkdir(os.path.join(sample_eggs, 'index'))
test.globs['sample_eggs'] = sample_eggs
......
src/zc/buildout/update.txt
View file @ bb152420
......@@ -85,9 +85,9 @@ Our buildout script has been updated to use the new eggs:
<BLANKLINE>
import sys
sys.path[0:0] = [
'/sample-buildout/eggs/zc.buildout-99.99-py2.4.egg',
'/sample-buildout/eggs/setuptools-99.99-py2.4.egg',
]
'/sample-buildout/eggs/zc.buildout-99.99-py2.4.egg',
'/sample-buildout/eggs/setuptools-99.99-py2.4.egg',
]
<BLANKLINE>
<BLANKLINE>
import zc.buildout.buildout
......
z3c.recipe.scripts_/CHANGES.txt 0 → 100644
View file @ bb152420
Change History
**************
1.0.0
=====
Initial public version.
z3c.recipe.scripts_/README.txt 0 → 100644
View file @ bb152420
********************************
Buildout Script Recipe
********************************
.. contents::
The script recipe installs eggs into a buildout eggs directory, exactly
like zc.recipe.egg, and then generates scripts in a buildout bin
directory with egg paths baked into them.
z3c.recipe.scripts_/setup.py 0 → 100644
View file @ bb152420
##############################################################################
#
# Copyright (c) 2007 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Setup for z3c.recipe.scripts package
$Id: setup.py 106736 2009-12-18 02:33:08Z gary $
"""
version = '1.0'
import os
from setuptools import setup, find_packages
def read(*rnames):
return open(os.path.join(os.path.dirname(__file__), *rnames)).read()
name = "z3c.recipe.scripts"
setup(
name = name,
version = version,
author = "Gary Poster",
author_email = "gary.poster@canonical.com",
description = "Recipe for installing Python scripts",
long_description = (
read('README.txt')
+ '\n' +
read('CHANGES.txt')
+ '\n' +
'Detailed Documentation\n'
'**********************\n'
+ '\n' +
read('src', 'z3c', 'recipe', 'scripts', 'README.txt')
+ '\n' +
'Download\n'
'*********\n'
),
keywords = "development build",
classifiers = [
'Development Status :: 5 - Production/Stable',
'Framework :: Buildout',
'Intended Audience :: Developers',
'License :: OSI Approved :: Zope Public License',
'Topic :: Software Development :: Build Tools',
'Topic :: Software Development :: Libraries :: Python Modules',
],
url='http://cheeseshop.python.org/pypi/z3c.recipe.scripts',
license = "ZPL 2.1",
packages = find_packages('src'),
package_dir = {'':'src'},
namespace_packages = ['z3c', 'z3c.recipe'],
install_requires = [
'zc.buildout >=1.2.0',
'zc.recipe.egg',
'setuptools'],
tests_require = ['zope.testing'],
test_suite = name+'.tests.test_suite',
entry_points = {'zc.buildout': ['default = %s:Scripts' % name,
'script = %s:Scripts' % name,
'scripts = %s:Scripts' % name,
'interpreter = %s:Interpreter' % name,
]
},
include_package_data = True,
zip_safe=False,
)
z3c.recipe.scripts_/src/z3c/__init__.py 0 → 100644
View file @ bb152420
__import__('pkg_resources').declare_namespace(__name__)
z3c.recipe.scripts_/src/z3c/recipe/__init__.py 0 → 100644
View file @ bb152420
__import__('pkg_resources').declare_namespace(__name__)
z3c.recipe.scripts_/src/z3c/recipe/scripts/README.txt 0 → 100644
View file @ bb152420
Script and interpreter generation
=================================
This recipe is very similar to zc.recipe.egg, and if you are familiar with its
options, you will be able to use this one easily.
The script and interpreter generation in this recipe are improved from
those provided by zc.recipe.egg in two basic ways.
- The interpreter generated by the script supports all interpreter
options, as opposed to the subset provided by zc.recipe.egg.
- Both scripts and interpreters from this recipe can optionally choose
to include site-packages, and even sitecustomize.
The recipe takes several options. First, here's the list of the options
that overlap from the standard zc.recipe.eggs scripts recipe. After
this, we'll list the new options and describe them.
* eggs
* find-links
* index
* python
* extra-paths
* entry-points
* scripts
* dependent-scripts
* interpreter
* arguments
* initialization
* relative-paths
In addition to these, the recipe offers these new options. They are
introduced here, and described more in depth below.
add-site-packages
You can choose to have the site-packages of the underlying Python
available to your script or interpreter, in addition to the packages
from your eggs. See the section on this option for motivations and
warnings.
extends
You can extend another section using this value. It is intended to be
used by extending a section that uses this package's scripts recipe.
In this manner, you can avoid repeating yourself.
exec-sitecustomize
Normally the Python's real sitecustomize module is not processed.
If you want it to be processed, set this value to 'true'. This will
be honored irrespective of the setting for include-site-paths.
script-initialization
The standard initialization code affects both an interpreter and scripts.
The code in script-initialization is used only for the generated scripts.
Finally, the "interpreter" entry point ignores ``script-initialization``,
``scripts``, and ``arguments``, and provides yet another additional option.
name
While, by default, the interpreter recipe takes the name of the
section to be the desired interpreter name, you can specify the
interpreter name here instead.
Script generation
-----------------
Generating a basic script looks virtually identical to using zc.recipe.egg.
(Note that the find-links and index values are typically not needed; they
are included to help make this document run as a test successfully.)
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demo
...
... [demo]
... recipe = z3c.recipe.scripts
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server))
>>> print system(buildout),
Installing demo.
Getting distribution for 'demo<0.3'.
Got demo 0.2.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated script '/sample-buildout/bin/demo'.
>>> print system(join(sample_buildout, 'bin', 'demo')),
2 2
Interpreter generation
----------------------
As with zc.recipe.egg, you can generate an interpreter with the default
script recipe shown above by supplying the "interpreter" option.
This example will create both an entry point script and an interpreter.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demo
...
... [demo]
... recipe = z3c.recipe.scripts
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... interpreter = py
... """ % dict(server=link_server))
>>> print system(buildout),
Uninstalling demo.
Installing demo.
Generated script '/sample-buildout/bin/demo'.
Generated interpreter '/sample-buildout/bin/py'.
You can also generate an interpreter alone with the ``interpreter`` recipe.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = py
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server))
>>> print system(buildout),
Uninstalling demo.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
In both cases, the bin/py script works by restarting Python after
specifying a special path in PYTHONPATH.
>>> cat(sample_buildout, 'bin', 'py') # doctest: +NORMALIZE_WHITESPACE
#!/usr/bin/python2.4 -S
<BLANKLINE>
import os
import sys
<BLANKLINE>
argv = [sys.executable] + sys.argv[1:]
environ = os.environ.copy()
path = '/sample-buildout/parts/py'
if environ.get('PYTHONPATH'):
path = os.pathsep.join([path, environ['PYTHONPATH']])
environ['PYTHONPATH'] = path
os.execve(sys.executable, argv, environ)
The path is a directory that contains two files: our own site.py and
sitecustomize.py. The site.py is modified from the underlying Python's
site.py, and is responsible for setting up our paths. The
sitecustomize.py is responsible for running the initialization code
provided.
>>> ls(sample_buildout, 'parts', 'py')
- site.py
- sitecustomize.py
Here's an example of using the generated interpreter.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ' -c "import sys, pprint; pprint.pprint(sys.path[:3])"')
['',
'/sample-buildout/eggs/demo-0.2-pyN.N.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-pyN.N.egg']
<BLANKLINE>
Including site-packages and sitecustomize
-----------------------------------------
As introduced above, this recipe supports including site packages. This has
some advantages and some serious dangers.
A typical reason to include site-packages is that it is easier to
install one or more dependencies in your Python than it is with
buildbot. Some packages, such as lxml or Python PostgreSQL integration,
have dependencies that can be much easier to build and/or install using
other mechanisms, such as your operating system's package manager. By
installing some core packages into your Python's site-packages, this can
significantly simplify some application installations.
However, doing this has a significant danger. One of the primary goals
of buildout is to provide repeatability. Some packages (one of the
better known Python openid packages, for instance) change their behavior
depending on what packages are available. If Python curl bindings are
available, these may be preferred by the library. If a certain XML
package is installed, it may be preferred by the library. These hidden
choices may cause small or large behavior differences. The fact that
they can be rarely encountered can actually make it worse: you forget
that this might be a problem, and debugging the differences can be
difficult. If you allow site-packages to be included in your buildout,
and the Python you use is not managed precisely by your application (for
instance, it is a system Python), you open yourself up to these
possibilities. Don't be unaware of the dangers.
To show off these features, we need to use buildout with a Python
executable with some extra paths to show ``add-site-packages``; and one
guaranteed to have a sitecustomize module to show
``exec-sitecustomize``. We'll make one using a test fixture called
``make_py``. The os.environ change below will go into the sitecustomize,
and the site_packages_path will be in the Python's path.
>>> py_path, site_packages_path = make_py(initialization='''\
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... ''')
>>> print site_packages_path
/executable_buildout/site-packages
Now let's take a look at add-site-packages.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = py
... executable = %(py_path)s
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... add-site-packages = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Uninstalling py.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import sys, pprint; pprint.pprint(sys.path)"''')
... # doctest: +ELLIPSIS
['',
'/sample-buildout/eggs/demo-0.2-pyN.N.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-pyN.N.egg',
'/executable_buildout/eggs/setuptools-0.6c11-pyN.N.egg',
'/executable_buildout/site-packages',
'/sample-buildout/parts/py',
'/executable_buildout/parts/py',
...]
<BLANKLINE>
Next we will use the exec-sitecustomize option. It simply copies
Python's underlying sitecustomize module, if it exists, to the local
version. The os.environ change shown above in the make_py call will go
into the sitecustomize.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = py
... executable = %(py_path)s
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... exec-sitecustomize = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Uninstalling py.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
... # doctest: +NORMALIZE_WHITESPACE
<BLANKLINE>
# The following is from
# /executable_buildout/parts/py/sitecustomize.py
<BLANKLINE>
import os
os.environ['zc.buildout'] = 'foo bar baz shazam'
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"''')
foo bar baz shazam
<BLANKLINE>
Options
-------
We'll focus now on the options that are different than zc.recipe.egg.
Let's look at the ``extends`` option first.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demo python
...
... [demo]
... recipe = z3c.recipe.scripts
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
...
... [python]
... recipe = z3c.recipe.scripts:interpreter
... extends = demo
... initialization =
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... """ % dict(server=link_server))
That makes it easier to specify some initialization for the interpreter
that is different than a script, while duplicating other configuration.
Now let's put it in action.
>>> print system(buildout),
Uninstalling py.
Installing demo.
Generated script '/sample-buildout/bin/demo'.
Installing python.
Generated interpreter '/sample-buildout/bin/python'.
>>> print system(join(sample_buildout, 'bin', 'python') +
... ' -c "import sys, pprint; pprint.pprint(sys.path[:3])"')
['',
'/sample-buildout/eggs/demo-0.2-pyN.N.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-pyN.N.egg']
<BLANKLINE>
>>> print system(join(sample_buildout, 'bin', 'python') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
Note that the parts/py directory has been cleaned up, and parts/python has
been created.
>>> ls(sample_buildout, 'parts')
d demo
d python
script-initialization
XXX
The last new option is ``name``. This simply changes the name of the
interpreter, so that you are not forced to use the name of the section.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = interpreter
...
... [interpreter]
... name = python2
... recipe = z3c.recipe.scripts:interpreter
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server))
>>> print system(buildout),
Uninstalling python.
Uninstalling demo.
Installing interpreter.
Generated interpreter '/sample-buildout/bin/python2'.
>>> print system(join(sample_buildout, 'bin', 'python2') +
... ' -c "print 42"')
42
<BLANKLINE>
The other options all identical to the zc.recipe.egg script. Here are some
quick demos and discussions.
z3c.recipe.scripts_/src/z3c/recipe/scripts/__init__.py 0 → 100644
View file @ bb152420
from z3c.recipe.scripts.scripts import Scripts, Interpreter
z3c.recipe.scripts_/src/z3c/recipe/scripts/scripts.py 0 → 100644
View file @ bb152420
##############################################################################
#
# Copyright (c) 2009-2010 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Install scripts from eggs.
"""
import os
import zc.buildout
import zc.buildout.easy_install
from zc.recipe.egg.egg import ScriptBase
class Base(ScriptBase):
def __init__(self, buildout, name, options):
if 'extends' in options:
options.update(buildout[options['extends']])
super(Base, self).__init__(buildout, name, options)
self.default_eggs = '' # Disables feature from zc.recipe.egg.
b_options = buildout['buildout']
options['parts-directory'] = os.path.join(
b_options['parts-directory'], self.name)
value = options.setdefault(
'add-site-packages',
b_options.get('add-site-packages', 'false'))
if value not in ('true', 'false'):
raise zc.buildout.UserError(
"Invalid value for add-site-packages option: %s" %
(value,))
self.add_site_packages = (value == 'true')
value = options.setdefault(
'exec-sitecustomize',
b_options.get('exec-sitecustomize', 'false'))
if value not in ('true', 'false'):
raise zc.buildout.UserError(
"Invalid value for exec-sitecustomize option: %s" %
(value,))
self.exec_sitecustomize = (value == 'true')
class Interpreter(Base):
def __init__(self, buildout, name, options):
super(Interpreter, self).__init__(buildout, name, options)
options.setdefault('name', name)
def install(self):
reqs, ws = self.working_set()
options = self.options
generated = []
if not os.path.exists(options['parts-directory']):
os.mkdir(options['parts-directory'])
generated.append(options['parts-directory'])
generated.extend(zc.buildout.easy_install.generate_scripts(
options['bin-directory'], ws, options['executable'],
options['parts-directory'],
interpreter=options['name'],
extra_paths=self.extra_paths,
initialization=options.get('initialization', ''),
add_site_packages=self.add_site_packages,
exec_sitecustomize=self.exec_sitecustomize,
relative_paths=self._relative_paths,
))
return generated
update = install
class Scripts(Base):
def _install(self, reqs, ws, scripts):
options = self.options
generated = []
if not os.path.exists(options['parts-directory']):
os.mkdir(options['parts-directory'])
generated.append(options['parts-directory'])
generated.extend(zc.buildout.easy_install.generate_scripts(
options['bin-directory'], ws, options['executable'],
options['parts-directory'], reqs=reqs, scripts=scripts,
interpreter=options.get('interpreter'),
extra_paths=self.extra_paths,
initialization=options.get('initialization', ''),
add_site_packages=self.add_site_packages,
exec_sitecustomize=self.exec_sitecustomize,
relative_paths=self._relative_paths,
script_arguments=options.get('arguments', ''),
script_initialization=options.get('script-initialization', '')
))
return generated
z3c.recipe.scripts_/src/z3c/recipe/scripts/tests.py 0 → 100644
View file @ bb152420
##############################################################################
#
# Copyright (c) 2006 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
import os, re, shutil, sys
import zc.buildout.tests
import zc.buildout.testselectingpython
import zc.buildout.testing
import unittest
from zope.testing import doctest, renormalizing
# We do not explicitly test the recipe support for the ``eggs``,
# ``find-links``, and ``index`` options because they are used for most or
# all of the examples. The README tests ``extends``,
# ``include-site-customization`` and ``name``. That leaves ``python``,
# ``extra-paths``, ``initialization``, ``relative-paths``, and
# ``include-site-packages``.
def supports_python_option():
"""
This simply shows that the ``python`` option can specify another section to
find the ``executable``. (The ``python`` option defaults to looking in the
``buildout`` section.) We do this by creating a custom Python that will have
some initialization that we can look for.
>>> py_path, site_packages_path = make_py(initialization='''
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... ''')
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [custom_python]
... executable = %(py_path)s
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... exec-sitecustomize = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... python = custom_python
... ''' % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Installing py.
Getting distribution for 'demo<0.3'.
Got demo 0.2.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated interpreter '/sample-buildout/bin/py'.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
"""
def interpreter_recipe_supports_extra_paths_option():
"""
This shows that specifying extra-paths will affect sys.path.
This recipe will not add paths that do not exist, so we create them.
>>> mkdir(sample_buildout, 'foo')
>>> mkdir(sample_buildout, 'foo', 'bar')
>>> mkdir(sample_buildout, 'spam')
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... find-links = %(server)s
... index = %(server)s/index
... extra-paths =
... ${buildout:directory}/foo/bar
... ${buildout:directory}/spam
... ''' % dict(server=link_server))
>>> print system(buildout),
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import sys;print 'path' + ' '.join(sys.path)"''')
... # doctest:+ELLIPSIS
path.../foo/bar /sample-buildout/spam...
"""
def interpreter_recipe_supports_initialization_option():
"""
This simply shows that the ``initialization`` option can specify code to
run on initialization.
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... initialization =
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... ''' % dict(server=link_server))
>>> print system(buildout),
Installing py.
Getting distribution for 'demo<0.3'.
Got demo 0.2.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
... # doctest: +NORMALIZE_WHITESPACE
<BLANKLINE>
import os
os.environ['zc.buildout'] = 'foo bar baz shazam'
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
This also works with the exec-sitecustomize option, processing local
initialization, and then the Python's initialization. We show this with a
custom Python.
>>> py_path, site_packages_path = make_py(initialization='''
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... ''')
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [custom_python]
... executable = %(py_path)s
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... initialization =
... import os
... os.environ['zc.recipe.egg'] = 'baLOOba'
... exec-sitecustomize = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... python = custom_python
... ''' % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Uninstalling py.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
... # doctest: +NORMALIZE_WHITESPACE
<BLANKLINE>
import os
os.environ['zc.recipe.egg'] = 'baLOOba'
<BLANKLINE>
# The following is from
# /executable_buildout/parts/py/sitecustomize.py
<BLANKLINE>
import os
os.environ['zc.buildout'] = 'foo bar baz shazam'
>>> print system(join(sample_buildout, 'bin', 'py') + ' -c ' +
... '''"import os; print os.environ['zc.recipe.egg']"'''),
baLOOba
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
"""
def interpreter_recipe_supports_relative_paths_option():
"""
This shows that the relative-paths option affects the code for inserting
paths into sys.path.
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [py]
... recipe = z3c.recipe.scripts:interpreter
... find-links = %(server)s
... index = %(server)s/index
... relative-paths = true
... extra-paths =
... /foo/bar
... ${buildout:directory}/spam
... ''' % dict(server=link_server))
>>> print system(buildout),
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
Let's look at the site.py that was generated:
>>> import sys
>>> sys.stdout.write('#'); cat(sample_buildout, 'parts', 'py', 'site.py')
... # doctest: +NORMALIZE_WHITESPACE +ELLIPSIS
#...
def addsitepackages(known_paths):
paths = []
<BLANKLINE>
import os
<BLANKLINE>
join = os.path.join
base = os.path.dirname(os.path.abspath(os.path.realpath(__file__)))
base = os.path.dirname(base)
base = os.path.dirname(base)
paths[0:0] = [ # eggs
'/foo/bar',
join(base, 'spam')
]...
"""
def setUp(test):
zc.buildout.tests.easy_install_SetUp(test)
zc.buildout.testing.install_develop('zc.recipe.egg', test)
zc.buildout.testing.install_develop('z3c.recipe.scripts', test)
def setUpSelecting(test):
zc.buildout.testselectingpython.setup(test)
zc.buildout.testing.install_develop('zc.recipe.egg', test)
zc.buildout.testing.install_develop('z3c.recipe.scripts', test)
def test_suite():
suite = unittest.TestSuite((
doctest.DocFileSuite(
'README.txt',
setUp=setUp, tearDown=zc.buildout.testing.buildoutTearDown,
checker=renormalizing.RENormalizing([
zc.buildout.testing.normalize_path,
zc.buildout.testing.normalize_endings,
zc.buildout.testing.normalize_script,
zc.buildout.testing.normalize_egg_py,
zc.buildout.tests.normalize_bang,
(re.compile(r'zc.buildout(-\S+)?[.]egg(-link)?'),
'zc.buildout.egg'),
(re.compile('[-d] setuptools-[^-]+-'), 'setuptools-X-'),
(re.compile(r'setuptools-[\w.]+-py'), 'setuptools-X-py'),
(re.compile(r'eggs\\\\demo'), 'eggs/demo'),
(re.compile(r'[a-zA-Z]:\\\\foo\\\\bar'), '/foo/bar'),
(re.compile(r'\#!\S+\bpython\S*'), '#!/usr/bin/python'),
])
),
doctest.DocTestSuite(
setUp=setUp,
tearDown=zc.buildout.testing.buildoutTearDown,
checker=renormalizing.RENormalizing([
zc.buildout.testing.normalize_path,
zc.buildout.testing.normalize_endings,
zc.buildout.testing.normalize_egg_py,
]),
),
))
return suite
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
zc.recipe.egg_/src/zc/recipe/egg/README.txt
View file @ bb152420
......@@ -46,7 +46,7 @@ We have a link server that has a number of distributions:
<a href="other-1.0-py2.3.egg">other-1.0-py2.3.egg</a><br>
</body></html>
We have a sample buildout. Let's update it's configuration file to
We have a sample buildout. Let's update its configuration file to
install the demo package.
>>> write(sample_buildout, 'buildout.cfg',
......@@ -174,10 +174,6 @@ relative-paths
egg paths. This option can be set in either the script section or
in the buildout section.
include-site-packages
If set to true, then generated scripts will ``import site`` to include
the site packages defined by the executable's site module.
Let's add an interpreter option:
>>> write(sample_buildout, 'buildout.cfg',
......@@ -193,7 +189,7 @@ Let's add an interpreter option:
... interpreter = py-demo
... """ % dict(server=link_server))
Note that we ommitted the entry point name from the recipe
Note that we omitted the entry point name from the recipe
specification. We were able to do this because the scripts recipe is
the default entry point for the zc.recipe.egg egg.
......@@ -550,110 +546,6 @@ setting the path. Note, as mentioned above, that leading whitespace
has been stripped. Similarly, the argument code we specified was
added in the entry point call (to main).
Including site packages
-----------------------
A specific kind of script initialization is available from an option:
``include-site-packages``. This option will include code that imports the
current executable's site module, thus setting whatever site-packages are
available. This affects both custom generated scripts and interpreter
scripts.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demo
...
... [demo]
... recipe = zc.recipe.egg
... find-links = %(server)s
... index = %(server)s/index
... scripts = demo=foo
... interpreter = py
... extra-paths =
... /foo/bar
... ${buildout:directory}/spam
... include-site-packages = true
... """ % dict(server=link_server))
>>> print system(buildout),
Uninstalling demo.
Installing demo.
Generated script '/sample-buildout/bin/foo'.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'bin', 'foo') # doctest: +NORMALIZE_WHITESPACE
#!/usr/local/bin/python2.4 -S
<BLANKLINE>
import sys
sys.path[0:0] = [
'/sample-buildout/eggs/demo-0.4c1-pyN.N.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-pyN.N.egg',
'/foo/bar',
'/sample-buildout/spam',
]
# We have to import pkg_resources before namespace
# package .pth files are processed or else the distribution's namespace
# packages will mask all of the egg-based packages in the same namespace
# package.
try:
import pkg_resources
except ImportError:
pass
import site
<BLANKLINE>
<BLANKLINE>
import eggrecipedemo
<BLANKLINE>
if __name__ == '__main__':
eggrecipedemo.main()
>>> cat(sample_buildout, 'bin', 'py') # doctest: +NORMALIZE_WHITESPACE
#!/usr/local/bin/python2.4 -S
<BLANKLINE>
import sys
<BLANKLINE>
sys.path[0:0] = [
'/sample-buildout/eggs/demo-0.4c1-pyN.N.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-pyN.N.egg',
'/foo/bar',
'/sample-buildout/spam',
]
# We have to import pkg_resources before namespace
# package .pth files are processed or else the distribution's namespace
# packages will mask all of the egg-based packages in the same namespace
# package.
try:
import pkg_resources
except ImportError:
pass
import site
<BLANKLINE>
_interactive = True
if len(sys.argv) > 1:
_options, _args = __import__("getopt").getopt(sys.argv[1:], 'ic:m:')
_interactive = False
for (_opt, _val) in _options:
if _opt == '-i':
_interactive = True
elif _opt == '-c':
exec _val
elif _opt == '-m':
sys.argv[1:] = _args
_args = []
__import__("runpy").run_module(
_val, {}, "__main__", alter_sys=True)
<BLANKLINE>
if _args:
sys.argv[:] = _args
__file__ = _args[0]
del _options, _args
execfile(__file__)
<BLANKLINE>
if _interactive:
del _interactive
__import__("code").interact(banner="", local=globals())
Specifying entry points
-----------------------
......@@ -693,11 +585,11 @@ declare entry points using the entry-points option:
<BLANKLINE>
import sys
sys.path[0:0] = [
'/sample-buildout/eggs/demo-0.4c1-py2.4.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-py2.4.egg',
'/foo/bar',
'/sample-buildout/spam',
]
'/sample-buildout/eggs/demo-0.4c1-py2.4.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-py2.4.egg',
'/foo/bar',
'/sample-buildout/spam',
]
<BLANKLINE>
<BLANKLINE>
import foo.bar
......@@ -753,217 +645,3 @@ be made to contact an index server:
Installing demo.
Generated script '/sample-buildout/bin/foo'.
Interpreter generation
----------------------
The interpreter described above is a script that mimics an
interpreter--it has support for only a limited number of command-line
options. What if you want a more full-featured interpreter?
The interpreter recipe generates a full-fledged version. Here's an example.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = py
...
... [py]
... recipe = zc.recipe.egg:interpreter
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server))
>>> print system(buildout),
Uninstalling demo.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
Notice that the recipe took the name of the interpreter from the name of the
section.
The bin/py script now just restarts Python after specifying a special
path in PYTHONPATH.
>>> cat(sample_buildout, 'bin', 'py') # doctest: +NORMALIZE_WHITESPACE
#!/usr/bin/python2.4 -S
<BLANKLINE>
import os
import sys
<BLANKLINE>
argv = [sys.executable] + sys.argv[1:]
environ = os.environ.copy()
path = '/sample-buildout/parts/py'
if environ.get('PYTHONPATH'):
path = os.pathsep.join([path, environ['PYTHONPATH']])
environ['PYTHONPATH'] = path
os.execve(sys.executable, argv, environ)
The path is a directory that contains two files: our own site.py and
sitecustomize.py.
>>> ls(sample_buildout, 'parts', 'py')
- site.py
- sitecustomize.py
>>> cat(sample_buildout, 'parts', 'py', 'site.py')
... # doctest: +NORMALIZE_WHITESPACE
import sys
sys.path[0:0] = [
'/sample-buildout/eggs/demo-0.2-py2.4.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-py2.4.egg',
]
import sitecustomize
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
Here's an example of using the generated interpreter.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ' -c "import sys, pprint; pprint.pprint(sys.path[:3])"')
['',
'/sample-buildout/eggs/demo-0.2-py2.4.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-py2.4.egg']
<BLANKLINE>
The interpreter recipe takes several options. First, here's the list of the
options that overlap from the scripts recipe. After this, we'll list the new
options and describe them.
* eggs
* find-links
* index
* python
* extra-paths
* initialization
* relative-paths
* include-site-packages
In addition to these, the interpreter script offers these three new options.
extends
You can extend another section using this value. It is intended to be
used by extending a section that uses this package's scripts recipe.
In this manner, you can avoid repeating yourself.
include-site-customization
Normally the Python's real sitecustomize module is not processed.
If you want it to be processed, set this value to 'true'. This will
be honored irrespective of the setting for include-site-paths.
name
If you do not want to have the interpreter have the same name as the
section, you can set it explicitly with this option.
Let's look at the ``extends`` option first.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demo python
...
... [demo]
... recipe = zc.recipe.egg
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
...
... [python]
... recipe = zc.recipe.egg:interpreter
... extends = demo
... """ % dict(server=link_server))
That's not quite as short as adding an "interpreter = py" option to the
[demo] section, but an improvement over what it could be.
Now let's put it in action.
>>> print system(buildout),
Uninstalling py.
Installing demo.
Generated script '/sample-buildout/bin/demo'.
Installing python.
Generated interpreter '/sample-buildout/bin/python'.
>>> print system(join(sample_buildout, 'bin', 'python') +
... ' -c "import sys, pprint; pprint.pprint(sys.path[:3])"')
['',
'/sample-buildout/eggs/demo-0.2-py2.4.egg',
'/sample-buildout/eggs/demoneeded-1.2c1-py2.4.egg']
<BLANKLINE>
Note that the parts/py directory has been cleaned up, and parts/python has
been created.
>>> ls(sample_buildout, 'parts')
d python
Now let's use the include-site-customization option. It simply lets Python's
underlying sitecustomize module, if it exists, be executed.
To show this, we need a Python executable guaranteed to have a sitecustomize
module. We'll make one. The os.environ change below will go into the
sitecustomize. We'll be able to use that as a flag.
>>> py_path, site_packages_path = make_py(initialization='''\
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... ''')
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = py
... executable = %(py_path)s
...
... [py]
... recipe = zc.recipe.egg:interpreter
... include-site-customization = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Uninstalling python.
Uninstalling demo.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
... # doctest: +NORMALIZE_WHITESPACE
execfile('/executable_buildout/parts/py/sitecustomize.py')
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"''')
foo bar baz shazam
<BLANKLINE>
The last new option is ``name``. This simply changes the name of the
interpreter, so that you are not forced to use the name of the section.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = interpreter
...
... [interpreter]
... name = python2
... recipe = zc.recipe.egg:interpreter
... include-site-customization = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... """ % dict(server=link_server))
>>> print system(buildout),
Uninstalling py.
Installing interpreter.
Generated interpreter '/sample-buildout/bin/python2'.
>>> print system(join(sample_buildout, 'bin', 'python2') +
... ' -c "print 42"')
42
<BLANKLINE>
The other options have been described before for the scripts recipe, and so
they will not be repeated here.
zc.recipe.egg_/src/zc/recipe/egg/__init__.py
View file @ bb152420
from zc.recipe.egg.egg import Egg, Scripts, Eggs, Interpreter
from zc.recipe.egg.egg import Egg, Scripts, Eggs
from zc.recipe.egg.custom import Custom, Develop
zc.recipe.egg_/src/zc/recipe/egg/api.txt
View file @ bb152420
......@@ -116,7 +116,6 @@ computed by the egg recipe by looking at .installed.cfg:
executable = /usr/local/bin/python2.3
extras = other
find-links = http://localhost:27071/
include-site-packages = false
index = http://localhost:27071/index
python = buildout
recipe = sample
......
zc.recipe.egg_/src/zc/recipe/egg/custom.txt
View file @ bb152420
......@@ -50,7 +50,7 @@ compiler
swig
The path to the swig executable
swig-cpp
swig-cpp
Make SWIG create C++ files (default is C)
swig-opts
......@@ -73,14 +73,14 @@ index
alternate index with this option. If you use the links option and
if the links point to the needed distributions, then the index can
be anything and will be largely ignored. In the examples, here,
we'll just point to an empty directory on our link server. This
we'll just point to an empty directory on our link server. This
will make our examples run a little bit faster.
python
The name of a section to get the Python executable from.
If not specified, then the buildout python option is used. The
Python executable is found in the executable option of the named
section.
section.
environment
The name of a section with additional environment variables. The
......@@ -150,6 +150,7 @@ eggs directory can be shared across multiple buildouts.
>>> ls(sample_buildout, 'develop-eggs')
d extdemo-1.4-py2.4-unix-i686.egg
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
Note that no scripts or dependencies are installed. To install
......@@ -188,7 +189,7 @@ Let's define a script that uses out ext demo:
...
... [demo]
... recipe = zc.recipe.egg
... eggs = demo
... eggs = demo
... extdemo
... entry-points = demo=demo:main
... """ % dict(server=link_server))
......@@ -231,6 +232,7 @@ We won't get an update.
>>> ls(sample_buildout, 'develop-eggs')
- demo.egg-link
d extdemo-1.4-py2.4-unix-i686.egg
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
But if we run the buildout in the default on-line and newest modes, we
......@@ -248,6 +250,7 @@ version is imported:
- demo.egg-link
d extdemo-1.4-py2.4-linux-i686.egg
d extdemo-1.5-py2.4-linux-i686.egg
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
Controlling the version used
......@@ -270,7 +273,7 @@ We can specify a specific version using the egg option:
...
... [demo]
... recipe = zc.recipe.egg
... eggs = demo
... eggs = demo
... extdemo ==1.4
... entry-points = demo=demo:main
... """ % dict(server=link_server))
......@@ -287,6 +290,7 @@ We can specify a specific version using the egg option:
>>> ls(sample_buildout, 'develop-eggs')
- demo.egg-link
d extdemo-1.4-py2.4-linux-i686.egg
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
......@@ -440,7 +444,7 @@ Create a clean buildout.cfg w/o the checkenv recipe, and delete the recipe:
Uninstalling extdemo.
Installing extdemo.
zip_safe flag not set; analyzing archive contents...
>>> rmdir(sample_buildout, 'recipes')
......@@ -496,7 +500,7 @@ compiler
swig
The path to the swig executable
swig-cpp
swig-cpp
Make SWIG create C++ files (default is C)
swig-opts
......@@ -506,7 +510,7 @@ python
The name of a section to get the Python executable from.
If not specified, then the buildout python option is used. The
Python executable is found in the executable option of the named
section.
section.
To illustrate this, we'll use a directory containing the extdemo
example from the earlier section:
......@@ -532,7 +536,7 @@ example from the earlier section:
...
... [demo]
... recipe = zc.recipe.egg
... eggs = demo
... eggs = demo
... extdemo
... entry-points = demo=demo:main
... """ % dict(extdemo=extdemo))
......@@ -553,6 +557,7 @@ Our develop-eggs now includes an egg link for extdemo:
>>> ls('develop-eggs')
- demo.egg-link
- extdemo.egg-link
- z3c.recipe.scripts.egg-link
- zc.recipe.egg.egg-link
and the extdemo now has a built extension:
......
zc.recipe.egg_/src/zc/recipe/egg/egg.py
View file @ bb152420
......@@ -128,27 +128,16 @@ class ScriptBase(Eggs):
self._relative_paths = ''
assert relative_paths == 'false'
value = options.setdefault(
'include-site-packages',
b_options.get('include-site-packages', 'false'))
if value not in ('true', 'false'):
raise zc.buildout.UserError(
"Invalid value for include-site-packages option: %s" %
(value,))
self.include_site_packages = (value == 'true')
class Scripts(ScriptBase):
parse_entry_point = re.compile(
'([^=]+)=(\w+(?:[.]\w+)*):(\w+(?:[.]\w+)*)$'
).match
def install(self):
reqs, ws = self.working_set()
options = self.options
scripts = options.get('scripts')
if scripts or scripts is None:
if scripts or scripts is None or options.get('interpreter'):
if scripts is not None:
scripts = scripts.split()
scripts = dict([
......@@ -172,66 +161,30 @@ class Scripts(ScriptBase):
name = dist.project_name
if name != 'setuptools' and name not in reqs:
reqs.append(name)
return zc.buildout.easy_install.scripts(
reqs, ws, options['executable'],
options['bin-directory'],
scripts=scripts,
extra_paths=self.extra_paths,
interpreter=options.get('interpreter'),
initialization=options.get('initialization', ''),
arguments=options.get('arguments', ''),
relative_paths=self._relative_paths,
import_site=self.include_site_packages,
)
return self._install(reqs, ws, scripts)
return ()
update = install
def _install(self, reqs, ws, scripts):
# Subclasses implement this.
raise NotImplementedError()
class Interpreter(ScriptBase):
def __init__(self, buildout, name, options):
if 'extends' in options:
options.update(buildout[options['extends']])
super(Interpreter, self).__init__(buildout, name, options)
self.default_eggs = ''
b_options = buildout['buildout']
options['parts-directory'] = os.path.join(
b_options['parts-directory'], self.name)
value = options.setdefault(
'include-site-customization',
b_options.get('include-site-customization', 'false'))
if value not in ('true', 'false'):
raise zc.buildout.UserError(
"Invalid value for include-site-customization option: %s" %
(value,))
self.include_site_customization = (value == 'true')
options.setdefault('name', name)
class Scripts(ScriptBase):
def install(self):
reqs, ws = self.working_set()
def _install(self, reqs, ws, scripts):
options = self.options
if not os.path.exists(options['parts-directory']):
os.mkdir(options['parts-directory'])
dir_made = True
else:
dir_made = False
generated = zc.buildout.easy_install.interpreter(
options['name'], ws, options['executable'],
options['bin-directory'], options['parts-directory'],
return zc.buildout.easy_install.scripts(
reqs, ws, options['executable'],
options['bin-directory'],
scripts=scripts,
extra_paths=self.extra_paths,
interpreter=options.get('interpreter'),
initialization=options.get('initialization', ''),
relative_paths=self._relative_paths,
import_site=self.include_site_packages,
import_sitecustomize=self.include_site_customization,
arguments=options.get('arguments', ''),
relative_paths=self._relative_paths
)
if dir_made:
generated.append(options['parts-directory'])
return generated
def get_bool(options, name, default=False):
......
zc.recipe.egg_/src/zc/recipe/egg/tests.py
View file @ bb152420
......@@ -29,249 +29,6 @@ def dirname(d, level=1):
return d
return dirname(os.path.dirname(d), level-1)
# We do not explicitly test the interpreter recipe support for the ``eggs``,
# ``find-links``, and ``index`` options because they are used for most or
# all of the examples. The README tests ``extends``,
# ``include-site-customization`` and ``name``. That leaves ``python``,
# ``extra-paths``, ``initialization``, ``relative-paths``, and
# ``include-site-packages``.
def interpreter_recipe_supports_python_option():
"""
This simply shows that the ``python`` option can specify another section to
find the ``executable``. (The ``python`` option defaults to looking in the
``buildout`` section.) We do this by creating a custom Python that will have
some initialization that we can look for.
>>> py_path, site_packages_path = make_py(initialization='''
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... ''')
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [custom_python]
... executable = %(py_path)s
...
... [py]
... recipe = zc.recipe.egg:interpreter
... include-site-customization = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... python = custom_python
... ''' % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Installing py.
Getting distribution for 'demo<0.3'.
Got demo 0.2.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated interpreter '/sample-buildout/bin/py'.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
"""
def interpreter_recipe_supports_extra_paths_option():
"""
This shows that specifying extra-paths will affect sys.path.
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [py]
... recipe = zc.recipe.egg:interpreter
... find-links = %(server)s
... index = %(server)s/index
... extra-paths =
... /foo/bar
... ${buildout:directory}/spam
... ''' % dict(server=link_server))
>>> print system(buildout),
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import sys;print 'path' + ' '.join(sys.path)"''')
... # doctest:+ELLIPSIS
path.../foo/bar /sample-buildout/spam...
"""
def interpreter_recipe_supports_initialization_option():
"""
This simply shows that the ``initialization`` option can specify code to
run on initialization.
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [py]
... recipe = zc.recipe.egg:interpreter
... initialization =
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... ''' % dict(server=link_server))
>>> print system(buildout),
Installing py.
Getting distribution for 'demo<0.3'.
Got demo 0.2.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
... # doctest: +NORMALIZE_WHITESPACE
<BLANKLINE>
import os
os.environ['zc.buildout'] = 'foo bar baz shazam'
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
This also works with the include-site-customization option, processing local
initialization, and then the Python's initialization. We show this with a
custom Python.
>>> py_path, site_packages_path = make_py(initialization='''
... import os
... os.environ['zc.buildout'] = 'foo bar baz shazam'
... ''')
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [custom_python]
... executable = %(py_path)s
...
... [py]
... recipe = zc.recipe.egg:interpreter
... initialization =
... import os
... os.environ['zc.recipe.egg'] = 'baLOOba'
... include-site-customization = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... python = custom_python
... ''' % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Uninstalling py.
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
>>> cat(sample_buildout, 'parts', 'py', 'sitecustomize.py')
... # doctest: +NORMALIZE_WHITESPACE
<BLANKLINE>
import os
os.environ['zc.recipe.egg'] = 'baLOOba'
execfile('/executable_buildout/parts/py/sitecustomize.py')
>>> print system(join(sample_buildout, 'bin', 'py') + ' -c ' +
... '''"import os; print os.environ['zc.recipe.egg']"'''),
baLOOba
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import os; print os.environ['zc.buildout']"'''),
foo bar baz shazam
"""
def interpreter_recipe_supports_relative_paths_option():
"""
This shows that the relative-paths option affects the code for inserting
paths into sys.path.
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
...
... [py]
... recipe = zc.recipe.egg:interpreter
... find-links = %(server)s
... index = %(server)s/index
... relative-paths = true
... extra-paths =
... /foo/bar
... ${buildout:directory}/spam
... ''' % dict(server=link_server))
>>> print system(buildout),
Installing py.
Generated interpreter '/sample-buildout/bin/py'.
Let's look at the site.py that was generated:
>>> cat(sample_buildout, 'parts', 'py', 'site.py')
... # doctest: +NORMALIZE_WHITESPACE
<BLANKLINE>
import os
<BLANKLINE>
join = os.path.join
base = os.path.dirname(os.path.abspath(os.path.realpath(__file__)))
base = os.path.dirname(base)
base = os.path.dirname(base)
import sys
sys.path[0:0] = [
'/foo/bar',
join(base, 'spam'),
]
import sitecustomize
"""
def interpreter_recipe_supports_include_site_packages_option():
"""
This option simply causes the executable's usual site.py to be processed.
We'll demonstrate this by using a Python that has its own extra path.
>>> py_path, site_packages_path = make_py()
>>> write(sample_buildout, 'buildout.cfg',
... '''
... [buildout]
... parts = py
... executable = %(py_path)s
...
... [py]
... recipe = zc.recipe.egg:interpreter
... include-site-packages = true
... eggs = demo<0.3
... find-links = %(server)s
... index = %(server)s/index
... ''' % dict(server=link_server, py_path=py_path))
>>> print system(buildout),
Installing py.
Getting distribution for 'demo<0.3'.
Got demo 0.2.
Getting distribution for 'demoneeded'.
Got demoneeded 1.2c1.
Generated interpreter '/sample-buildout/bin/py'.
>>> print system(join(sample_buildout, 'bin', 'py') +
... ''' -c "import sys; print (%r in sys.path) or (%r, sys.path)"''' %
... (site_packages_path, site_packages_path)),
True
"""
def setUp(test):
zc.buildout.tests.easy_install_SetUp(test)
zc.buildout.testing.install_develop('zc.recipe.egg', test)
......@@ -332,15 +89,6 @@ def test_suite():
(re.compile('extdemo[.]pyd'), 'extdemo.so')
]),
),
doctest.DocTestSuite(
setUp=setUp,
tearDown=zc.buildout.testing.buildoutTearDown,
checker=renormalizing.RENormalizing([
zc.buildout.testing.normalize_path,
zc.buildout.testing.normalize_endings,
zc.buildout.testing.normalize_egg_py,
]),
),
))
......
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