mirror of https://github.com/pypa/pip
Extract console script spec calculation from install_wheel
This big chunk of code was independent of the rest of our wheel installation process. Moving it out enforces that there are no dependencies between it and the original function, and makes it easier to read the original function.
This commit is contained in:
Chris Hunt
parent
e2bcc56f71
commit
94421cfb1a
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@ -299,6 +299,92 @@ def get_csv_rows_for_installed(
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return installed_rows
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def get_console_script_specs(console):
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# type: (Dict[str, str]) -> List[str]
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"""
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Given the mapping from entrypoint name to callable, return the relevant
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console script specs.
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"""
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# Don't mutate caller's version
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console = console.copy()
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scripts_to_generate = []
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# Special case pip and setuptools to generate versioned wrappers
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#
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# The issue is that some projects (specifically, pip and setuptools) use
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# code in setup.py to create "versioned" entry points - pip2.7 on Python
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# 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
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# the wheel metadata at build time, and so if the wheel is installed with
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# a *different* version of Python the entry points will be wrong. The
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# correct fix for this is to enhance the metadata to be able to describe
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# such versioned entry points, but that won't happen till Metadata 2.0 is
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# available.
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# In the meantime, projects using versioned entry points will either have
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# incorrect versioned entry points, or they will not be able to distribute
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# "universal" wheels (i.e., they will need a wheel per Python version).
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#
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# Because setuptools and pip are bundled with _ensurepip and virtualenv,
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# we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
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# override the versioned entry points in the wheel and generate the
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# correct ones. This code is purely a short-term measure until Metadata 2.0
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# is available.
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#
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# To add the level of hack in this section of code, in order to support
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# ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
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# variable which will control which version scripts get installed.
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#
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# ENSUREPIP_OPTIONS=altinstall
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# - Only pipX.Y and easy_install-X.Y will be generated and installed
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# ENSUREPIP_OPTIONS=install
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# - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
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# that this option is technically if ENSUREPIP_OPTIONS is set and is
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# not altinstall
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# DEFAULT
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# - The default behavior is to install pip, pipX, pipX.Y, easy_install
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# and easy_install-X.Y.
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pip_script = console.pop('pip', None)
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if pip_script:
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if "ENSUREPIP_OPTIONS" not in os.environ:
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scripts_to_generate.append('pip = ' + pip_script)
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if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
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scripts_to_generate.append(
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'pip{} = {}'.format(sys.version_info[0], pip_script)
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)
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scripts_to_generate.append(
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'pip{} = {}'.format(get_major_minor_version(), pip_script)
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)
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# Delete any other versioned pip entry points
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pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
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for k in pip_ep:
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del console[k]
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easy_install_script = console.pop('easy_install', None)
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if easy_install_script:
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if "ENSUREPIP_OPTIONS" not in os.environ:
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scripts_to_generate.append(
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'easy_install = ' + easy_install_script
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)
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scripts_to_generate.append(
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'easy_install-{} = {}'.format(
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get_major_minor_version(), easy_install_script
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)
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)
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# Delete any other versioned easy_install entry points
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easy_install_ep = [
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k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
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]
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for k in easy_install_ep:
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del console[k]
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# Generate the console entry points specified in the wheel
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scripts_to_generate.extend(starmap('{} = {}'.format, console.items()))
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return scripts_to_generate
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class MissingCallableSuffix(Exception):
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pass
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@ -510,79 +596,8 @@ def install_unpacked_wheel(
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# See https://bitbucket.org/pypa/distlib/issue/32/
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maker.set_mode = True
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scripts_to_generate = []
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# Special case pip and setuptools to generate versioned wrappers
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#
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# The issue is that some projects (specifically, pip and setuptools) use
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# code in setup.py to create "versioned" entry points - pip2.7 on Python
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# 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
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# the wheel metadata at build time, and so if the wheel is installed with
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# a *different* version of Python the entry points will be wrong. The
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# correct fix for this is to enhance the metadata to be able to describe
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# such versioned entry points, but that won't happen till Metadata 2.0 is
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# available.
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# In the meantime, projects using versioned entry points will either have
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# incorrect versioned entry points, or they will not be able to distribute
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# "universal" wheels (i.e., they will need a wheel per Python version).
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#
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# Because setuptools and pip are bundled with _ensurepip and virtualenv,
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# we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
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# override the versioned entry points in the wheel and generate the
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# correct ones. This code is purely a short-term measure until Metadata 2.0
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# is available.
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#
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# To add the level of hack in this section of code, in order to support
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# ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
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# variable which will control which version scripts get installed.
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#
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# ENSUREPIP_OPTIONS=altinstall
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# - Only pipX.Y and easy_install-X.Y will be generated and installed
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# ENSUREPIP_OPTIONS=install
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# - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
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# that this option is technically if ENSUREPIP_OPTIONS is set and is
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# not altinstall
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# DEFAULT
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# - The default behavior is to install pip, pipX, pipX.Y, easy_install
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# and easy_install-X.Y.
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pip_script = console.pop('pip', None)
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if pip_script:
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if "ENSUREPIP_OPTIONS" not in os.environ:
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scripts_to_generate.append('pip = ' + pip_script)
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if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
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scripts_to_generate.append(
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'pip{} = {}'.format(sys.version_info[0], pip_script)
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)
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scripts_to_generate.append(
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'pip{} = {}'.format(get_major_minor_version(), pip_script)
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)
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# Delete any other versioned pip entry points
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pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
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for k in pip_ep:
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del console[k]
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easy_install_script = console.pop('easy_install', None)
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if easy_install_script:
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if "ENSUREPIP_OPTIONS" not in os.environ:
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scripts_to_generate.append(
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'easy_install = ' + easy_install_script
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)
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scripts_to_generate.append(
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'easy_install-{} = {}'.format(
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get_major_minor_version(), easy_install_script
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)
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)
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# Delete any other versioned easy_install entry points
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easy_install_ep = [
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k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
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]
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for k in easy_install_ep:
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del console[k]
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# Generate the console and GUI entry points specified in the wheel
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scripts_to_generate.extend(starmap('{} = {}'.format, console.items()))
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scripts_to_generate = get_console_script_specs(console)
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gui_scripts_to_generate = list(starmap('{} = {}'.format, gui.items()))
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