Commit bafc42a5 authored by Jim Fulton's avatar Jim Fulton

Improved error reporting by showing which packages require other

packages that can't be found or that cause version conflicts.

Fixed a renormalizer to prevent spurious test failures,
parent 6099d7ac
......@@ -232,6 +232,135 @@ and all parts have to have a specified recipe:
Error: Missing option: x:recipe
"""
make_dist_that_requires_setup_py_template = """
from setuptools import setup
setup(name=%r, version=%r,
install_requires=%r,
)
"""
def make_dist_that_requires(dest, name, requires=[], version=1, egg=''):
os.mkdir(os.path.join(dest, name))
open(os.path.join(dest, name, 'setup.py'), 'w').write(
make_dist_that_requires_setup_py_template
% (name, version, requires)
)
def show_who_requires_when_there_is_a_conflict():
"""
It's a pain when we require eggs that have requirements that are
incompatible. We want the error we get to tell us what is missing.
Let's make a few develop distros, some of which have incompatible
requirements.
>>> make_dist_that_requires(sample_buildout, 'sampley',
... ['demoneeded ==1.0'])
>>> make_dist_that_requires(sample_buildout, 'samplez',
... ['demoneeded ==1.1'])
Now, let's create a buildout that requires y and z:
>>> write('buildout.cfg',
... '''
... [buildout]
... parts = eggs
... develop = sampley samplez
... find-links = %(link_server)s
...
... [eggs]
... recipe = zc.recipe.egg
... eggs = sampley
... samplez
... ''' % globals())
>>> print system(buildout),
buildout: Develop: /sample-buildout/sampley
buildout: Develop: /sample-buildout/samplez
buildout: Installing eggs
zc.buildout.easy_install: Getting new distribution for demoneeded==1.1
zc.buildout.easy_install: Got demoneeded 1.1
While:
Installing eggs
Error: There is a version conflict.
We already have: demoneeded 1.1
but sampley 1 requires demoneeded==1.0.
Here, we see that sampley required an older version of demoneeded.
What if we hadn't required sampley ourselves:
>>> make_dist_that_requires(sample_buildout, 'samplea', ['sampleb'])
>>> make_dist_that_requires(sample_buildout, 'sampleb',
... ['sampley', 'samplea'])
>>> write('buildout.cfg',
... '''
... [buildout]
... parts = eggs
... develop = sampley samplez samplea sampleb
... find-links = %(link_server)s
...
... [eggs]
... recipe = zc.recipe.egg
... eggs = samplea
... samplez
... ''' % globals())
>>> print system(buildout),
buildout: Develop: /sample-buildout/sampley
buildout: Develop: /sample-buildout/samplez
buildout: Develop: /sample-buildout/samplea
buildout: Develop: /sample-buildout/sampleb
buildout: Installing eggs
While:
Installing eggs
Error: There is a version conflict.
We already have: demoneeded 1.1
but sampley 1 requires demoneeded==1.0.
sampley 1 is required by sampleb 1.
sampleb 1 is required by samplea 1.
"""
def show_who_requires_missing_distributions():
"""
When working with a lot of eggs, which require eggs recursively,
it can be hard to tell why we're requireing things we can't find.
Fortunately, buildout will tell us who's asking for something that
we can't find.
>>> make_dist_that_requires(sample_buildout, 'sampley', ['demoneeded'])
>>> make_dist_that_requires(sample_buildout, 'samplea', ['sampleb'])
>>> make_dist_that_requires(sample_buildout, 'sampleb',
... ['sampley', 'samplea'])
>>> write('buildout.cfg',
... '''
... [buildout]
... parts = eggs
... develop = sampley samplea sampleb
...
... [eggs]
... recipe = zc.recipe.egg
... eggs = samplea
... ''')
>>> print system(buildout),
buildout: Develop: /sample-buildout/sampley
buildout: Develop: /sample-buildout/samplea
buildout: Develop: /sample-buildout/sampleb
buildout: Installing eggs
Couldn't find index page for 'demoneeded' (maybe misspelled?)
zc.buildout.easy_install: Getting new distribution for demoneeded
While:
Installing eggs
Getting distribution for demoneeded
Error: Couldn't find a distribution for demoneeded.
demoneeded is required by sampley 1.
sampley 1 is required by sampleb 1.
sampleb 1 is required by samplea 1.
"""
def test_comparing_saved_options_with_funny_characters():
"""
......@@ -1963,6 +2092,8 @@ def test_suite():
'setuptools.egg'),
(re.compile('zc.buildout-\S+-'),
'zc.buildout.egg'),
(re.compile('File "\S+one.py"'),
'File "one.py"'),
]),
),
))
......
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