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Commit6cd93c8

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Monkeypatch pkg_resources to always use _markerlib
Prior to setuptools 20.10.0 there is patchy support for environment markers,and setup.py fails while parsing them.html5lib requires at least setuptools 18.5 for its environment markers.However,@gsnedders developed a way to monkey patch pkg_resourcesso that it always uses _markerlib, which allows all environment markersto be used for any version of setuptools. Some patching of _markerlibis also required so that it works on Python 3 also.On removing the dependency for setuptools>=18.5, pip partially fails onPython 2.6 with an error `Double requirement given: ordereddict`and does not install the requirements.txt.Fixed by removing ordereddict from requirements-test.txt
1 parent14d4851 commit6cd93c8

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4 files changed

+48
-10
lines changed

4 files changed

+48
-10
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‎requirements-install.sh‎

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@@ -5,9 +5,6 @@ if [[ $USE_OPTIONAL != "true" && $USE_OPTIONAL != "false" ]]; then
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exit 1
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fi
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# Make sure we're running setuptools >= 18.5
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pip install -U pip setuptools>=18.5
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pip install -U -r requirements-test.txt
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if [[$USE_OPTIONAL=="true" ]];then

‎requirements-test.txt‎

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@@ -4,4 +4,3 @@ flake8
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pytest
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pytest-expect>=1.1,<2.0
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mock
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ordereddict ; python_version < '2.7'

‎requirements.txt‎

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@@ -1,4 +1,3 @@
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six
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webencodings
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ordereddict ;python_version<'2.7'
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setuptools>=18.5

‎setup.py‎

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@@ -8,10 +8,54 @@
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fromsetuptoolsimportsetup,find_packages,__version__assetuptools_version
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frompkg_resourcesimportparse_version
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ifparse_version(setuptools_version)<parse_version("18.5"):
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print("html5lib requires setuptools version 18.5 or above; "
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"please upgrade before installing (you have %s)"%setuptools_version)
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sys.exit(1)
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importpkg_resources
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try:
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import_markerlib.markers
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exceptImportError:
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_markerlib=None
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# _markerlib.default_environment() obtains its data from _VARS
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# and wraps it in another dict, but _markerlib_evaluate writes
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# to the dict while it is iterating the keys, causing an error
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# on Python 3 only.
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# Replace _markerlib.default_environment to return a custom dict
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# that has all the necessary markers, and ignores any writes.
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classPython3MarkerDict(dict):
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def__setitem__(self,key,value):
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pass
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defpop(self,i=-1):
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returnself[i]
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if_markerlibandsys.version_info[0]==3:
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env=_markerlib.markers._VARS
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forkeyinlist(env.keys()):
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new_key=key.replace('.','_')
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ifnew_key!=key:
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env[new_key]=env[key]
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_markerlib.markers._VARS=Python3MarkerDict(env)
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defdefault_environment():
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return_markerlib.markers._VARS
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_markerlib.default_environment=default_environment
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# Avoid the very buggy pkg_resources.parser, which doesnt consistently
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# recognise the markers needed by this setup.py
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# Change this to setuptools 20.10.0 to support all markers.
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ifpkg_resources:
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ifparse_version(setuptools_version)<parse_version('18.5'):
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MarkerEvaluation=pkg_resources.MarkerEvaluation
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delpkg_resources.parser
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pkg_resources.evaluate_marker=MarkerEvaluation._markerlib_evaluate
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MarkerEvaluation.evaluate_marker=MarkerEvaluation._markerlib_evaluate
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classifiers= [
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'Development Status :: 5 - Production/Stable',
@@ -60,7 +104,6 @@
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install_requires=[
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'six',
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'webencodings',
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'setuptools>=18.5'
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],
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extras_require={
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# A empty extra that only has a conditional marker will be

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