Merged revisions 71277 to 71397 from dev branch:

Feature Changes
---------------

- Variable substitutions now reflect option data written by recipes.

- A part referenced by a part in a parts list is now added to the parts
  list before the referencing part.  This means that you can omit
  parts from the parts list if they are referenced by other parts.

- Added a develop function to the easy_install module to aid in
  creating develop eggs with custom build_ext options.

- The build and develop functions in the easy_install module now
  return the path of the egg or egg link created.

- Removed the limitation that parts named in the install command can
  only name configured parts.

- Removed support ConfigParser-style variable substitutions
  (e.g. %(foo)s). Only the string-template style of variable
  (e.g. ${section:option}) substitutions will be supported.
  Supporting both violates "there's only one way to do it".

- Deprecated the buildout-section extendedBy option.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@71398 62d5b8a3-27da-0310-9561-8e5933582275

CHANGES.txt

@@ -20,9 +20,34 @@ priorities include:
 Change History
 **************
 
-1.0.0b12 (2006-10-?)
+1.0.0b13 (2006-12-04)
 =====================
 
+Feature Changes
+---------------
+
+- Variable substitutions now reflect option data written by recipes.
+
+- A part referenced by a part in a parts list is now added to the parts
+  list before the referencing part.  This means that you can omit
+  parts from the parts list if they are referenced by other parts.
+
+- Added a develop function to the easy_install module to aid in
+  creating develop eggs with custom build_ext options.
+
+- The build and develop functions in the easy_install module now
+  return the path of the egg or egg link created.
+
+- Removed the limitation that parts named in the install command can
+  only name configured parts.
+
+- Removed support ConfigParser-style variable substitutions
+  (e.g. %(foo)s). Only the string-template style of variable
+  (e.g. ${section:option}) substitutions will be supported.
+  Supporting both violates "there's only one way to do it".
+
+- Deprecated the buildout-section extendedBy option.
+
 Bugs Fixed
 ----------
 

setup.py

@@ -25,6 +25,8 @@ setup(
         + '\n' +
         read('src', 'zc', 'buildout', 'testing.txt')
         + '\n' +
+        read('src', 'zc', 'buildout', 'easy_install.txt')
+        + '\n' +
         'Download\n'
         '**********************\n'
         ),

src/zc/buildout/easy_install.py

@@ -34,10 +34,13 @@ logger = logging.getLogger('zc.buildout.easy_install')
 
 url_match = re.compile('[a-z0-9+.-]+://').match
 
+setuptools_loc = pkg_resources.working_set.find(
+    pkg_resources.Requirement.parse('setuptools')
+    ).location
+
 # Include buildout and setuptools eggs in paths
 buildout_and_setuptools_path = [
-    pkg_resources.working_set.find(
-        pkg_resources.Requirement.parse('setuptools')).location,
+    setuptools_loc,
     pkg_resources.working_set.find(
         pkg_resources.Requirement.parse('zc.buildout')).location,
     ]
@@ -404,12 +407,15 @@ def build(spec, dest, build_ext,
 
     dist = _satisfied(requirement, env, dest, executable, index_url, links)
     if dist is not None:
-        return dist
+        return [dist.location]
 
-    # Get an editable version of the package to a temporary directory:
-    tmp = tempfile.mkdtemp('editable')
-    tmp2 = tempfile.mkdtemp('editable')
+    undo = []
     try:
+        tmp = tempfile.mkdtemp('build')
+        undo.append(lambda : shutil.rmtree(tmp)) 
+        tmp2 = tempfile.mkdtemp('build')
+        undo.append(lambda : shutil.rmtree(tmp2))
+
         index = _get_index(executable, index_url, links)
         dist = index.fetch_distribution(requirement, tmp2, False, True)
         if dist is None:
@@ -442,12 +448,104 @@ def build(spec, dest, build_ext,
         setuptools.command.setopt.edit_config(
             setup_cfg, dict(build_ext=build_ext))
 
-        # Now run easy_install for real:
+        tmp3 = tempfile.mkdtemp('build', dir=dest)
+        undo.append(lambda : shutil.rmtree(tmp3)) 
+
         _call_easy_install(base, env, pkg_resources.WorkingSet(),
-                           dest, links, index_url, executable, True)
+                           tmp3, links, index_url, executable, True)
+
+        return _copyeggs(tmp3, dest, '.egg', undo)
+        
     finally:
-        shutil.rmtree(tmp)
-        shutil.rmtree(tmp2)
+        undo.reverse()
+        [f() for f in undo]
+        
+
+def _rm(*paths):
+    for path in paths:
+        if os.path.isdir(path):
+            shutil.rmtree(path)
+        elif os.path.exists(path):
+            os.remove(path)
+
+def _copyeggs(src, dest, suffix, undo):
+    result = []
+    undo.append(lambda : _rm(*result))
+    for name in os.listdir(src):
+        if name.endswith(suffix):
+            new = os.path.join(dest, name)
+            _rm(new)
+            os.rename(os.path.join(src, name), new)
+            result.append(new)
+
+    assert len(result) == 1
+    undo.pop()
+    
+    return result[0]
+
+def develop(setup, dest,
+            build_ext=None,
+            executable=sys.executable):
+
+    if os.path.isdir(setup):
+        directory = setup
+        setup = os.path.join(directory, 'setup.py')
+    else:
+        directory = os.path.dirname(setup)
+        
+    undo = []
+    try:
+        if build_ext:
+            setup_cfg = os.path.join(directory, 'setup.cfg')
+            if os.path.exists(setup_cfg):
+                os.rename(setup_cfg, setup_cfg+'-develop-aside')
+                def restore_old_setup():
+                    if os.path.exists(setup_cfg):
+                        os.remove(setup_cfg)
+                    os.rename(setup_cfg+'-develop-aside', setup_cfg)
+                undo.append(restore_old_setup)
+            else:
+                open(setup_cfg, 'w')
+                undo.append(lambda: os.remove(setup_cfg))
+            setuptools.command.setopt.edit_config(
+                setup_cfg, dict(build_ext=build_ext))
+
+        fd, tsetup = tempfile.mkstemp()
+        undo.append(lambda: os.remove(tsetup))
+        undo.append(lambda: os.close(fd))
+
+        os.write(fd, runsetup_template % dict(
+            setuptools=setuptools_loc,
+            setupdir=directory,
+            setup=setup,
+            __file__ = setup,
+            ))
+
+        tmp3 = tempfile.mkdtemp('build', dir=dest)
+        undo.append(lambda : shutil.rmtree(tmp3)) 
+
+        args = [
+            zc.buildout.easy_install._safe_arg(tsetup),
+            '-q', 'develop', '-mxN',
+            '-d', _safe_arg(tmp3),
+            ]
+
+        log_level = logger.getEffectiveLevel()
+        if log_level <= logging.DEBUG:
+            if log_level == logging.DEBUG:
+                del args[1]
+            else:
+                args[1] == '-v'
+            logger.debug("in: %s\n%r", directory, args)
+
+        assert os.spawnl(os.P_WAIT, executable, executable, *args) == 0
+
+        return _copyeggs(tmp3, dest, '.egg-link', undo)
+
+    finally:
+        undo.reverse()
+        [f() for f in undo]
+            
             
 def working_set(specs, executable, path):
     return install(specs, None, executable=executable, path=path)
@@ -596,5 +694,14 @@ if _interactive:
     code.interact(banner="", local=globals())
 '''
         
+runsetup_template = """
+import sys
+sys.path.insert(0, %(setuptools)r)
+import os, setuptools
 
+__file__ = %(__file__)r
 
+os.chdir(%(setupdir)r)
+sys.argv[0] = %(setup)r
+execfile(%(setup)r)
+"""

src/zc/buildout/easy_install.txt

-Minimal Python interface to easy_install
-========================================
+Python API for egg and script installation
+==========================================
 
-The easy_install module provides a minimal interface to the setuptools
-easy_install command that provides some additional semantics:
+The easy_install module provides some functions to provide support for
+egg and script installation.  It provides functionality at the python
+level that is similar to easy_install, with a few exceptions:
 
 - By default, we look for new packages *and* the packages that
   they depend on.  This is somewhat like (and uses) the --upgrade
@@ -21,8 +22,8 @@ easy_install command that provides some additional semantics:
 - Distutils options for building extensions can be passed.
 
 The easy_install module provides a method, install, for installing one
-or more packages and their dependencies.  The
-install function takes 2 positional arguments:
+or more packages and their dependencies.  The install function takes 2
+positional arguments:
 
 - An iterable of setuptools requirement strings for the distributions
   to be installed, and
@@ -426,18 +427,18 @@ You can also pass script initialization code:
         eggrecipedemo.main(1, 2)
 
 
-Handling custom build options for extensions
---------------------------------------------
+Handling custom build options for extensions provided in source distributions
+-----------------------------------------------------------------------------
 
 Sometimes, we need to control how extension modules are built.  The
-build method provides this level of control.  It takes a single
+build function provides this level of control.  It takes a single
 package specification, downloads a source distribution, and builds it
 with specified custom build options.
 
-The build method takes 3 positional arguments:
+The build function takes 3 positional arguments:
 
 spec
-   A package specification
+   A package specification for a source distribution
 
 dest
    A destination directory
@@ -486,9 +487,13 @@ extension, extdemo.c::
   PyMODINIT_FUNC
   initextdemo(void)
   {
-      PyObject *d;
-      d = Py_InitModule3("extdemo", methods, "");
-      PyDict_SetItemString(d, "val", PyInt_FromLong(EXTDEMO));    
+      PyObject *m;
+      m = Py_InitModule3("extdemo", methods, "");
+  #ifdef TWO
+      PyModule_AddObject(m, "val", PyInt_FromLong(2));
+  #else
+      PyModule_AddObject(m, "val", PyInt_FromLong(EXTDEMO));
+  #endif
   }
 
 The extension depends on a system-dependnt include file, extdemo.h,
@@ -497,9 +502,11 @@ that defines a constant, EXTDEMO, that is exposed by the extension.
 We'll add an include directory to our sample buildout and add the
 needed include file to it:
 
-    >>> mkdir(sample_buildout, 'include')
-    >>> open(os.path.join(sample_buildout, 'include', 'extdemo.h'), 'w').write(
-    ...    "#define EXTDEMO 42\n")
+    >>> mkdir('include')
+    >>> write('include', 'extdemo.h',
+    ... """
+    ... #define EXTDEMO 42
+    ... """)
 
 Now, we can use the build function to create an egg from the source
 distribution:
@@ -508,6 +515,9 @@ distribution:
     ...   'extdemo', dest, 
     ...   {'include-dirs': os.path.join(sample_buildout, 'include')},
     ...   links=[link_server], index=link_server+'index/')
+    '/sample-install/extdemo-1.4-py2.4-unix-i686.egg'
+
+The function returns the list of eggs 
 
 Now if we look in our destination directory, we see we have an extdemo egg:
 
@@ -516,3 +526,68 @@ Now if we look in our destination directory, we see we have an extdemo egg:
     d  demoneeded-1.1-py2.4.egg
     d  extdemo-1.4-py2.4-unix-i686.egg
 
+Handling custom build options for extensions in develop eggs
+------------------------------------------------------------
+
+The develop function is similar to the build function, except that,
+rather than building an egg from a source directory containing a
+setup.py script.  
+
+The develop function takes 2 positional arguments:
+
+setup
+   The path to a setup script, typically named "setup.py", or a
+   directory containing a setup.py script.
+
+dest
+   The directory to install the egg link to
+
+It supports some optional keyword argument:
+
+build_ext
+   A dictionary of options to be passed to the distutils build_ext
+   command when building extensions.
+
+executable
+   A path to a Python executable.  Distributions will ne installed
+   using this executable and will be for the matching Python version.
+
+We have a local directory containing the extdemo source:
+
+    >>> ls(extdemo)
+    -  MANIFEST
+    -  MANIFEST.in
+    -  README
+    -  extdemo.c
+    -  setup.py
+
+Now, we can use the develop function to create a develop egg from the source
+distribution:
+
+    >>> zc.buildout.easy_install.develop(
+    ...   extdemo, dest, 
+    ...   {'include-dirs': os.path.join(sample_buildout, 'include')})
+    '/sample-install/extdemo.egg-link'
+
+The name of the egg link created is returned.
+
+Now if we look in our destination directory, we see we have an extdemo
+egg link:
+
+    >>> ls(dest)
+    d  demo-0.3-py2.4.egg
+    d  demoneeded-1.1-py2.4.egg
+    d  extdemo-1.4-py2.4-linux-i686.egg
+    -  extdemo.egg-link
+
+And that the source directory contains the compiled extension:
+
+    >>> ls(extdemo)
+    -  MANIFEST
+    -  MANIFEST.in
+    -  README
+    d  build
+    -  extdemo.c
+    d  extdemo.egg-info
+    -  extdemo.so
+    -  setup.py

src/zc/buildout/tests.py

@@ -45,7 +45,7 @@ We should be able to deal with setup scripts that aren't setuptools based.
     ... ''')
 
     >>> print system(join('bin', 'buildout')),
-    buildout: Develop: /sample-buildout/foo/setup.py
+    buildout: Develop: /sample-buildout/foo
 
     >>> ls('develop-eggs')
     -  foo.egg-link
@@ -71,9 +71,8 @@ We should be able to deal with setup scripts that aren't setuptools based.
     ... ''')
 
     >>> print system(join('bin', 'buildout')+' -v'), # doctest: +ELLIPSIS
-    Configuration data:
-    ...
-    buildout: Develop: /sample-buildout/foo/setup.py
+    zc.buildout...
+    buildout: Develop: /sample-buildout/foo
     ...
     Installed /sample-buildout/foo
     ...
@@ -86,7 +85,7 @@ We should be able to deal with setup scripts that aren't setuptools based.
 def buildout_error_handling():
     r"""Buildout error handling
 
-Asking for a section that doesn't exist, yields a key error:
+Asking for a section that doesn't exist, yields a missing section error:
 
     >>> import os
     >>> os.chdir(sample_buildout)
@@ -95,7 +94,7 @@ Asking for a section that doesn't exist, yields a key error:
     >>> buildout['eek']
     Traceback (most recent call last):
     ...
-    KeyError: 'eek'
+    MissingSection: The referenced section, 'eek', was not defined.
 
 Asking for an option that doesn't exist, a MissingOption error is raised:
 
@@ -109,8 +108,7 @@ It is an error to create a variable-reference cycle:
     >>> write(sample_buildout, 'buildout.cfg',
     ... '''
     ... [buildout]
-    ... develop = recipes
-    ... parts = data_dir debug
+    ... parts =
     ... x = ${buildout:y}
     ... y = ${buildout:z}
     ... z = ${buildout:x}
@@ -183,7 +181,7 @@ Al parts have to have a section:
     ... ''')
 
     >>> print system(os.path.join(sample_buildout, 'bin', 'buildout')),
-    Error: No section was specified for part x
+    Error: The referenced section, 'x', was not defined.
 
 and all parts have to have a specified recipe:
 
@@ -265,15 +263,15 @@ def test_comparing_saved_options_with_funny_characters():
     >>> os.chdir(sample_buildout)
     >>> buildout = os.path.join(sample_buildout, 'bin', 'buildout')
 
-    >>> print system(buildout), # doctest: +ELLIPSIS
-    buildout: Develop: ...setup.py
+    >>> print system(buildout),
+    buildout: Develop: /sample-buildout/recipes
     buildout: Installing debug
 
 If we run the buildout again, we shoudn't get a message about
 uninstalling anything because the configuration hasn't changed.
 
-    >>> print system(buildout), # doctest: +ELLIPSIS
-    buildout: Develop: ...setup.py
+    >>> print system(buildout),
+    buildout: Develop: /sample-buildout/recipes
     buildout: Updating debug
 """
 
@@ -317,20 +315,21 @@ Then try to install it again:
 
     """
 
-def error_for_indefined_install_parts():
-    """
-Any parts we pass to install on the command line must be
-listed in the configuration.
+# Why?
+## def error_for_undefined_install_parts():
+##     """
+## Any parts we pass to install on the command line must be
+## listed in the configuration.
 
-    >>> print system(join('bin', 'buildout') + ' install foo'),
-    buildout: Invalid install parts: foo.
-    Install parts must be listed in the configuration.
+##     >>> print system(join('bin', 'buildout') + ' install foo'),
+##     buildout: Invalid install parts: foo.
+##     Install parts must be listed in the configuration.
 
-    >>> print system(join('bin', 'buildout') + ' install foo bar'),
-    buildout: Invalid install parts: foo bar.
-    Install parts must be listed in the configuration.
+##     >>> print system(join('bin', 'buildout') + ' install foo bar'),
+##     buildout: Invalid install parts: foo bar.
+##     Install parts must be listed in the configuration.
     
-    """
+##     """
 
 
 bootstrap_py = os.path.join(
@@ -515,7 +514,7 @@ Create a develop egg:
     ... """)
 
     >>> print system(join('bin', 'buildout')),
-    buildout: Develop: /sample-buildout/foo/setup.py
+    buildout: Develop: /sample-buildout/foo
 
     >>> ls('develop-eggs')
     -  foox.egg-link
@@ -536,8 +535,8 @@ Create another:
     ... """)
 
     >>> print system(join('bin', 'buildout')),
-    buildout: Develop: /sample-buildout/foo/setup.py
-    buildout: Develop: /sample-buildout/bar/setup.py
+    buildout: Develop: /sample-buildout/foo
+    buildout: Develop: /sample-buildout/bar
 
     >>> ls('develop-eggs')
     -  foox.egg-link
@@ -552,7 +551,7 @@ Remove one:
     ... parts =
     ... """)
     >>> print system(join('bin', 'buildout')),
-    buildout: Develop: /sample-buildout/bar/setup.py
+    buildout: Develop: /sample-buildout/bar
 
 It is gone
 
@@ -611,7 +610,7 @@ a devlop egg, we will also generate a warning.
     ... """)
 
     >>> print system(join('bin', 'buildout')),
-    buildout: Develop: /sample-buildout/foo/setup.py
+    buildout: Develop: /sample-buildout/foo
 
 Now, if we generate a working set using the egg link, we will get a warning
 and we will get setuptools included in the working set.
@@ -659,7 +658,6 @@ We do not get a warning, but we do get setuptools included in the working set:
     ...     ])]
     ['foox', 'setuptools']
 
-
     >>> print handler,
 
 We get the same behavior if the it is a depedency that uses a
@@ -682,8 +680,8 @@ namespace package.
     ... """)
 
     >>> print system(join('bin', 'buildout')),
-    buildout: Develop: /sample-buildout/foo/setup.py
-    buildout: Develop: /sample-buildout/bar/setup.py
+    buildout: Develop: /sample-buildout/foo
+    buildout: Develop: /sample-buildout/bar
 
     >>> [dist.project_name
     ...  for dist in zc.buildout.easy_install.working_set(
@@ -704,6 +702,52 @@ namespace package.
 
     '''
 
+def develop_preserves_existing_setup_cfg():
+    """
+    
+See "Handling custom build options for extensions in develop eggs" in
+easy_install.txt.  This will be very similar except that we'll have an
+existing setup.cfg:
+
+    >>> write(extdemo, "setup.cfg",
+    ... '''
+    ... # sampe cfg file
+    ...
+    ... [foo]
+    ... bar = 1
+    ...
+    ... [build_ext]
+    ... define = X,Y
+    ... ''')
+
+    >>> mkdir('include')
+    >>> write('include', 'extdemo.h',
+    ... '''
+    ... #define EXTDEMO 42
+    ... ''')
+
+    >>> dest = tmpdir('dest')
+    >>> zc.buildout.easy_install.develop(
+    ...   extdemo, dest, 
+    ...   {'include-dirs': os.path.join(sample_buildout, 'include')})
+    '/tmp/tmp7AFYXv/_TEST_/dest/extdemo.egg-link'
+
+    >>> ls(dest)
+    -  extdemo.egg-link
+
+    >>> cat(extdemo, "setup.cfg")
+    <BLANKLINE>
+    # sampe cfg file
+    <BLANKLINE>
+    [foo]
+    bar = 1
+    <BLANKLINE>
+    [build_ext]
+    define = X,Y
+
+"""
+    
+    
 def create_sample_eggs(test, executable=sys.executable):
     write = test.globs['write']
     dest = test.globs['sample_eggs']
@@ -762,9 +806,13 @@ static PyMethodDef methods[] = {{NULL}};
 PyMODINIT_FUNC
 initextdemo(void)
 {
-    PyObject *d;
-    d = Py_InitModule3("extdemo", methods, "");
-    PyDict_SetItemString(d, "val", PyInt_FromLong(EXTDEMO));    
+    PyObject *m;
+    m = Py_InitModule3("extdemo", methods, "");
+#ifdef TWO
+    PyModule_AddObject(m, "val", PyInt_FromLong(2));
+#else
+    PyModule_AddObject(m, "val", PyInt_FromLong(EXTDEMO));
+#endif
 }
 """
 
@@ -778,8 +826,8 @@ setup(name = "extdemo", version = "1.4", url="http://www.zope.org",
 """
 
 def add_source_dist(test):
-    import tarfile
-    tmp = tempfile.mkdtemp('test-sdist')
+    
+    tmp = test.globs['extdemo'] = test.globs['tmpdir']('extdemo')
     write = test.globs['write']
     try:
         write(tmp, 'extdemo.c', extdemo_c);
@@ -930,7 +978,7 @@ def test_suite():
                ]),
             ),
         doctest.DocTestSuite(
-            setUp=zc.buildout.testing.buildoutSetUp,
+            setUp=easy_install_SetUp,
             tearDown=zc.buildout.testing.buildoutTearDown,
             checker=renormalizing.RENormalizing([
                zc.buildout.testing.normalize_path,

src/zc/buildout/update.txt

@@ -74,7 +74,7 @@ new versions found in new releases:
       zc.buildout version 99.99,
       setuptools version 99.99;
     restarting.
-    buildout: Develop: /sample-buildout/showversions/setup.py
+    buildout: Develop: /sample-buildout/showversions
     buildout: Installing show-versions
     zc.buildout 99.99
     setuptools 99.99
@@ -122,7 +122,7 @@ We'll actually "upgrade" to an earlier version.
       zc.buildout version 1.0.0,
       setuptools version 0.6;
     restarting.
-    buildout: Develop: /sample-buildout/showversions/setup.py
+    buildout: Develop: /sample-buildout/showversions
     buildout: Updating show-versions
     zc.buildout 1.0.0
     setuptools 0.6
@@ -143,7 +143,7 @@ We won't upgrade in offline mode:
     ... """ % dict(new_releases=new_releases))
 
     >>> print system(buildout),
-    buildout: Develop: /sample-buildout/showversions/setup.py
+    buildout: Develop: /sample-buildout/showversions
     buildout: Updating show-versions
     zc.buildout 1.0.0
     setuptools 0.6
@@ -174,4 +174,3 @@ directory:
     buildout: Not upgrading because not running a local buildout command
 
     >>> ls('bin')
-

zc.recipe.egg_/CHANGES.txt

@@ -8,6 +8,27 @@ To do
 Change History
 **************
 
+1.0.0b3 (2006-12-04)
+====================
+
+Feature Changes
+---------------
+
+- Added a develop recipe for creating develop eggs.
+
+  This is useful to:
+
+  - Specify custom extension building options,
+
+  - Specify a version of Python to use, and to
+
+  - Cause develop eggs to be created after other parts.
+
+- The develop and build recipes now return the paths created, so that 
+  created eggs or egg links are removed when a part is removed (or
+  changed).
+
+
 1.0.0b2 (2006-10-16)
 ====================
 

zc.recipe.egg_/setup.py

@@ -42,7 +42,9 @@ setup(
     tests_require = ['zope.testing'],
     test_suite = name+'.tests.test_suite',
     entry_points = {'zc.buildout': ['default = %s:Egg' % name,
+                                    'script = %s:Egg' % name,
                                     'custom = %s:Custom' % name,
+                                    'develop = %s:Develop' % name,
                                     ]
                     },
     zip_safe=False,

zc.recipe.egg_/src/zc/recipe/egg/__init__.py

 from zc.recipe.egg.egg import Egg
-from zc.recipe.egg.custom import Custom
+from zc.recipe.egg.custom import Custom, Develop

zc.recipe.egg_/src/zc/recipe/egg/custom.py

@@ -19,12 +19,27 @@ $Id$
 import os, re, zipfile
 import zc.buildout.easy_install
 
-class Custom:
+class Base:
 
     def __init__(self, buildout, name, options):
-        self.buildout = buildout
-        self.name = name
-        self.options = options
+        self.name, self.options = name, options
+
+        options['_d'] = buildout['buildout']['develop-eggs-directory']
+
+        python = options.get('python', buildout['buildout']['python'])
+        options['executable'] = buildout[python]['executable']
+
+        self.build_ext = build_ext(buildout, options)
+
+
+    def update(self):
+        return self.install()
+
+class Custom(Base):
+
+    def __init__(self, buildout, name, options):
+        Base.__init__(self, buildout, name, options)
+
         links = options.get('find-links',
                             buildout['buildout'].get('find-links'))
         if links:
@@ -39,16 +54,38 @@ class Custom:
             options['index'] = index
         self.index = index
 
-        options['_b'] = buildout['buildout']['bin-directory']
         options['_e'] = buildout['buildout']['eggs-directory']
-        options['_d'] = buildout['buildout']['develop-eggs-directory']
 
         assert options.get('unzip') in ('true', 'false', None)
 
-        python = options.get('python', buildout['buildout']['python'])
-        options['executable'] = buildout[python]['executable']
+        if buildout['buildout'].get('offline') == 'true':
+            self.install = lambda: ()
 
-        build_ext = {}
+    def install(self):
+        options = self.options
+        distribution = options.get('eggs', self.name).strip()
+        return zc.buildout.easy_install.build(
+            distribution, options['_d'], self.build_ext,
+            self.links, self.index, options['executable'], [options['_e']],
+            )
+        
+class Develop(Base):
+
+    def __init__(self, buildout, name, options):
+        Base.__init__(self, buildout, name, options)
+        options['setup'] = os.path.join(buildout['buildout']['directory'],
+                                        options['setup'])
+
+    def install(self):
+        options = self.options
+        return zc.buildout.easy_install.develop(
+            options['setup'], options['_d'], self.build_ext,
+            options['executable'],
+            )
+        
+
+def build_ext(buildout, options):
+    result = {}
     for be_option in ('include-dirs', 'library-dirs', 'rpath'):
         value = options.get(be_option)
         if value is None:
@@ -61,25 +98,22 @@ class Custom:
             for v in value.strip().split('\n')
             if v.strip()
         ]
-            build_ext[be_option] = ':'.join(value)
-            options[be_option] = ':'.join(value)
-        self.build_ext = build_ext
+        result[be_option] = os.pathsep.join(value)
+        options[be_option] = os.pathsep.join(value)
 
-    def install(self):
-        if self.buildout['buildout'].get('offline') == 'true':
-            return ()
-        options = self.options
-        distribution = options.get('eggs', self.name).strip()
-        build_ext = dict([
-            (k, options[k])
-            for k in ('include-dirs', 'library-dirs', 'rpath')
-            if k in options
-            ])
-        zc.buildout.easy_install.build(
-            distribution, options['_d'], self.build_ext,
-            self.links, self.index, options['executable'], [options['_e']],
+    swig = options.get('swig')
+    if swig:
+        options['swig'] = result['swig'] = os.path.join(
+            buildout['buildout']['directory'],
+            swig,
             )
 
-        return ()
+    for be_option in ('define', 'undef', 'libraries', 'link-objects',
+                      'debug', 'force', 'compiler', 'swig-cpp', 'swig-opts',
+                      ):
+        value = options.get(be_option)
+        if value is None:
+            continue
+        result[be_option] = value
 
-    update = install
+    return result

zc.recipe.egg_/src/zc/recipe/egg/custom.txt

-Custon eggs
-===========
+Creating eggs with extensions neededing custom build settings
+=============================================================
 
 Sometimes, It's necessary to provide extra control over how an egg is
 created.  This is commonly true for eggs with extension modules that
@@ -20,6 +20,42 @@ rpath
    A new-line separated list of directories to search for dynamic libraries
    at run time.
 
+define
+   A comma-separated list of names of C preprocessor variables to
+   define.
+
+undef
+   A comman separated list of names of C preprocessor variables to
+   undefine.
+
+libraries
+   The name of an additional library to link with.  Due to limitations
+   in distutils and desprite the option name, only a single library
+   can be specified.
+
+link-objects
+   The name of an link object to link afainst.  Due to limitations
+   in distutils and desprite the option name, only a single link object
+   can be specified.
+
+debug
+   Compile/link with debugging information
+
+force
+   Forcibly build everything (ignore file timestamps)
+
+compiler
+   Specify the compiler type
+
+swig
+   The path to the swig executable
+
+swig-cpp           
+   Make SWIG create C++ files (default is C)
+
+swig-opts
+   List of SWIG command line options
+
 In addition, the following options can be used to specify the egg:
 
 egg
@@ -57,9 +93,13 @@ package that has a simple extension module::
   PyMODINIT_FUNC
   initextdemo(void)
   {
-      PyObject *d;
-      d = Py_InitModule3("extdemo", methods, "");
-      PyDict_SetItemString(d, "val", PyInt_FromLong(EXTDEMO));    
+      PyObject *m;
+      m = Py_InitModule3("extdemo", methods, "");
+  #ifdef TWO
+      PyModule_AddObject(m, "val", PyInt_FromLong(2));
+  #else
+      PyModule_AddObject(m, "val", PyInt_FromLong(EXTDEMO));
+  #endif
   }
 
 The extension depends on a system-dependnt include file, extdemo.h,
@@ -71,10 +111,11 @@ extdemo-1.4.tar.gz, on a distribution server.
 We have a sample buildout that we'll add an include directory to with
 the necessary include file:
 
-    >>> mkdir(sample_buildout, 'include')
-    >>> import os
-    >>> open(os.path.join(sample_buildout, 'include', 'extdemo.h'), 'w').write(
-    ...    "#define EXTDEMO 42\n")
+    >>> mkdir('include')
+    >>> write('include', 'extdemo.h',
+    ... """
+    ... #define EXTDEMO 42
+    ... """)
 
 We'll also update the buildout configuration file to define a part for
 the egg:
@@ -91,8 +132,7 @@ the egg:
     ... include-dirs = include
     ... """ % dict(server=link_server))
 
-    >>> os.chdir(sample_buildout)
-    >>> buildout = os.path.join(sample_buildout, 'bin', 'buildout')
+    >>> buildout = join('bin', 'buildout')
 
     >>> print system(buildout),
     buildout: Installing extdemo
@@ -113,3 +153,177 @@ Note that no scripts or dependencies are installed.  To install
 dependencies or scripts for a custom egg, define another part and use
 the zc.recipe.egg recipe, listing the custom egg as one of the eggs to
 be installed.  The zc.recipe.egg recipe will use the installed egg.
+
+Let's define a script that uses out ext demo:
+
+    >>> mkdir('demo')
+    >>> write('demo', 'demo.py',
+    ... """
+    ... import extdemo
+    ... def main():
+    ...     print extdemo.val
+    ... """)
+
+    >>> write('demo', 'setup.py',
+    ... """
+    ... from setuptools import setup
+    ... setup(name='demo')
+    ... """)
+
+
+    >>> write('buildout.cfg',
+    ... """
+    ... [buildout]
+    ... develop = demo
+    ... parts = extdemo demo
+    ...
+    ... [extdemo]
+    ... recipe = zc.recipe.egg:custom
+    ... find-links = %(server)s
+    ... index = %(server)s/index
+    ... include-dirs = include
+    ...
+    ... [demo]
+    ... recipe = zc.recipe.egg
+    ... eggs = demo 
+    ...        extdemo
+    ... entry-points = demo=demo:main
+    ... """ % dict(server=link_server))
+
+    >>> print system(buildout),
+    buildout: Develop: /sample-buildout/demo
+    buildout: Updating extdemo
+    buildout: Installing demo
+
+When we run the script, we'll 42 printed:
+
+    >>> print system(join('bin', 'demo')),
+    42
+
+Controlling develop-egg generation
+==================================
+
+If you want to provide custom build options for a develop egg, you can
+use the develop recipe.  The recipe has the following options:
+
+path
+   The path to a setup script or directory containing a startup
+   script. This is required.
+
+include-dirs
+   A new-line separated list of directories to search for include
+   files.
+
+library-dirs
+   A new-line separated list of directories to search for libraries
+   to link with.
+
+rpath
+   A new-line separated list of directories to search for dynamic libraries
+   at run time.
+
+define
+   A comma-separated list of names of C preprocessor variables to
+   define.
+
+undef
+   A comman separated list of names of C preprocessor variables to
+   undefine.
+
+libraries
+   The name of an additional library to link with.  Due to limitations
+   in distutils and desprite the option name, only a single library
+   can be specified.
+
+link-objects
+   The name of an link object to link afainst.  Due to limitations
+   in distutils and desprite the option name, only a single link object
+   can be specified.
+
+debug
+   Compile/link with debugging information
+
+force
+   Forcibly build everything (ignore file timestamps)
+
+compiler
+   Specify the compiler type
+
+swig
+   The path to the swig executable
+
+swig-cpp           
+   Make SWIG create C++ files (default is C)
+
+swig-opts
+   List of SWIG command line options
+
+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. 
+
+To illustrate this, we'll use a directory containing the extdemo
+example from the earlier section:
+
+    >>> ls(extdemo)
+    -  MANIFEST
+    -  MANIFEST.in
+    -  README
+    -  extdemo.c
+    -  setup.py
+
+    >>> write('buildout.cfg',
+    ... """
+    ... [buildout]
+    ... develop = demo
+    ... parts = extdemo demo
+    ...
+    ... [extdemo]
+    ... setup = %(extdemo)s
+    ... recipe = zc.recipe.egg:develop
+    ... include-dirs = include
+    ... define = TWO
+    ...
+    ... [demo]
+    ... recipe = zc.recipe.egg
+    ... eggs = demo 
+    ...        extdemo
+    ... entry-points = demo=demo:main
+    ... """ % dict(extdemo=extdemo))
+
+Note that we added a define option to cause the preprocessor variable
+TWO to be defined.  This will cause the module-variable, 'val', to be
+set with a value of 2.
+
+    >>> print system(buildout),
+    buildout: Develop: /tmp/tmpCXjRps/_TEST_/sample-buildout/demo
+    buildout: Uninstalling extdemo
+    buildout: Installing extdemo
+    buildout: Updating demo
+
+Our develop-eggs now includes an egg link for extdemo:
+
+    >>> ls('develop-eggs')
+    -  demo.egg-link
+    -  extdemo.egg-link
+    -  zc.recipe.egg.egg-link
+
+and the extdemo now has a built extension:
+
+    >>> ls(extdemo)
+    -  MANIFEST
+    -  MANIFEST.in
+    -  README
+    d  build
+    -  extdemo.c
+    d  extdemo.egg-info
+    -  extdemo.so
+    -  setup.py
+
+Because develop eggs take precedence over non-develop eggs, the demo
+script will use the new develop egg:
+
+    >>> print system(join('bin', 'demo')),
+    2

zc.recipe.egg_/src/zc/recipe/egg/tests.py

@@ -78,6 +78,7 @@ def test_suite():
             'custom.txt',
             setUp=setUp, tearDown=zc.buildout.testing.buildoutTearDown,
             checker=renormalizing.RENormalizing([
+               zc.buildout.testing.normalize_path,
                (re.compile("(d  ((ext)?demo(needed)?|other)"
                            "-\d[.]\d-py)\d[.]\d(-\S+)?[.]egg"),
                 '\\1V.V.egg'),