Commit 45eb64b4 authored by Jérome Perrin's avatar Jérome Perrin

fixup! zc.recipe.egg: Improve on the fly pathces.

Only build egg at this point if we have some patches to apply otherwise
buildout would install dependent egg without logging this operation, which
would cause many tests to fail.

Also cover the whole scenario of egg patching in a new doctest.
parent 7488bf75
......@@ -851,8 +851,9 @@ class Installer:
else:
logger.debug('Adding required %r', str(req))
self._log_requirement(ws, req)
self._env.scan(
self.build(str(req), {}, patch_dict=patch_dict))
if patch_dict and req.project_name in patch_dict:
self._env.scan(
self.build(str(req), {}, patch_dict=patch_dict))
  • Here, str(req) is same as req.project_name ? If so, I prefer we use the same expression for both places.

  • It's different:

    (Pdb) req.project_name
    'setuptools'
    (Pdb) str(req)
    'setuptools>=8.0'

    For reference, this is also the same pattern as the one above

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for dist in self._get_dist(req, ws,
for_buildout_run=for_buildout_run):
ws.add(dist)
......
Patching eggs before installation
---------------------------------
The SlapOS extensions of ``zc.recipe.egg`` supports applying patches before installing eggs.
The syntax is to use a version with the magic string ``SlapOSPatched`` plus the number of
patches to apply.
Let's use a patch for demoneeded egg:
>>> write(sample_buildout, 'demoneeded.patch',
... r"""diff -ru before/demoneeded-1.1/eggrecipedemoneeded.py after/demoneeded-1.1/eggrecipedemoneeded.py
... --- before/demoneeded-1.1/eggrecipedemoneeded.py 2020-09-08 09:27:36.000000000 +0200
... +++ after/demoneeded-1.1/eggrecipedemoneeded.py 2020-09-08 09:46:16.482243822 +0200
... @@ -1,3 +1,3 @@
... -y=1
... +y="patched demoneeded"
... def f():
... pass
... \ No newline at end of file
... """)
First, we install demoneeded directly:
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demoneeded
...
... [demoneeded]
... recipe = zc.recipe.egg:eggs
... eggs = demoneeded
... find-links = %(server)s
... index = %(server)s/index
... demoneeded-patches =
... ./demoneeded.patch#4b8ad56711dd0d898a2b7957e9604079
... demoneeded-patch-options = -p2
...
... [versions]
... demoneeded = 1.1+SlapOSPatched001
... """ % dict(server=link_server))
When running buildout, we have a warning that a different version is installed, but that's not fatal.
>>> print_(system(buildout), end='')
Installing demoneeded.
patching file eggrecipedemoneeded.py
Installing demoneeded 1.1
Caused installation of a distribution:
demoneeded 1.1+slapospatched001
with a different version.
The installed egg has the slapospatched001 marker
>>> ls(sample_buildout, 'eggs')
d demoneeded-1.1+slapospatched001-pyN.N.egg
- setuptools-0.7-py2.3.egg
d zc.buildout-1.0-py2.3.egg
The code of the egg has been patched:
>>> import glob
>>> import os.path
>>> cat(glob.glob(os.path.join(sample_buildout, 'eggs', 'demoneeded-1.1+slapospatched001*', '*'))[0])
y="patched demoneeded"
def f():
pass
Reset the state and also remove the installed egg
>>> remove('.installed.cfg')
>>> rmdir(glob.glob(os.path.join(sample_buildout, 'eggs', 'demoneeded-1.1+slapospatched001*'))[0])
In the previous example we applied patches to an egg installed directly, but
the same technique can be used to apply patches on eggs installed as dependencies.
In this example we install demo and apply a patch to demoneeded, which is a dependency to demo.
>>> write(sample_buildout, 'buildout.cfg',
... """
... [buildout]
... parts = demo
...
... [demo]
... recipe = zc.recipe.egg
... eggs = demo
... find-links = %(server)s
... index = %(server)s/index
... demoneeded-patches =
... ./demoneeded.patch#4b8ad56711dd0d898a2b7957e9604079
... demoneeded-patch-options = -p2
...
... [versions]
... demoneeded = 1.1+SlapOSPatched001
... """ % dict(server=link_server))
When running buildout, we also have that warning that a different version is installed.
>>> print_(system(buildout), end='')
Installing demo.
Getting distribution for 'demo'.
Got demo 0.3.
patching file eggrecipedemoneeded.py
Installing demoneeded 1.1
Caused installation of a distribution:
demoneeded 1.1+slapospatched001
with a different version.
Generated script '/sample-buildout/bin/demo'.
The installed egg has the slapospatched001 marker
>>> ls(sample_buildout, 'eggs')
d demo-0.3-pyN.N.egg
d demoneeded-1.1+slapospatched001-pyN.N.egg
- setuptools-0.7-py2.3.egg
d zc.buildout-1.0-py2.3.egg
If we run the demo script we see the patch was applied:
>>> print_(system(join(sample_buildout, 'bin', 'demo')), end='')
3 patched demoneeded
......@@ -110,6 +110,29 @@ def test_suite():
]),
),
))
suite = unittest.TestSuite((
doctest.DocFileSuite(
'patches.rst',
setUp=setUp, tearDown=zc.buildout.testing.buildoutTearDown,
optionflags=doctest.NORMALIZE_WHITESPACE | doctest.ELLIPSIS,
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,
zc.buildout.tests.normalize_S,
zc.buildout.testing.not_found,
zc.buildout.testing.easy_install_deprecated,
(re.compile(r'[d-] zc.buildout(-\S+)?[.]egg(-link)?'),
'zc.buildout.egg'),
(re.compile(r'[d-] setuptools-[^-]+-'), 'setuptools-X-'),
(re.compile(r'eggs\\\\demo'), 'eggs/demo'),
(re.compile(r'[a-zA-Z]:\\\\foo\\\\bar'), '/foo/bar'),
])
),
))
return suite
if __name__ == '__main__':
......
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