mirror of
https://github.com/pre-commit/pre-commit.git
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85 lines
2.4 KiB
Python
85 lines
2.4 KiB
Python
from __future__ import unicode_literals
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import contextlib
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import distutils.spawn
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import os
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import sys
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from pre_commit.envcontext import envcontext
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from pre_commit.envcontext import UNSET
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from pre_commit.envcontext import Var
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from pre_commit.languages import helpers
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from pre_commit.util import clean_path_on_failure
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from pre_commit.xargs import xargs
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ENVIRONMENT_DIR = 'py_env'
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def bin_dir(venv):
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"""On windows there's a different directory for the virtualenv"""
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bin_part = 'Scripts' if os.name == 'nt' else 'bin'
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return os.path.join(venv, bin_part)
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def get_env_patch(venv):
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return (
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('PYTHONHOME', UNSET),
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('VIRTUAL_ENV', venv),
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('PATH', (bin_dir(venv), os.pathsep, Var('PATH'))),
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)
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@contextlib.contextmanager
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def in_env(repo_cmd_runner, language_version):
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envdir = os.path.join(
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repo_cmd_runner.prefix_dir,
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helpers.environment_dir(ENVIRONMENT_DIR, language_version),
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)
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with envcontext(get_env_patch(envdir)):
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yield
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def norm_version(version):
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if os.name == 'nt': # pragma: no cover (windows)
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# Try looking up by name
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if distutils.spawn.find_executable(version):
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return version
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# If it is in the form pythonx.x search in the default
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# place on windows
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if version.startswith('python'):
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return r'C:\{0}\python.exe'.format(version.replace('.', ''))
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# Otherwise assume it is a path
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return os.path.expanduser(version)
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def install_environment(
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repo_cmd_runner,
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version='default',
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additional_dependencies=(),
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):
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additional_dependencies = tuple(additional_dependencies)
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directory = helpers.environment_dir(ENVIRONMENT_DIR, version)
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# Install a virtualenv
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with clean_path_on_failure(repo_cmd_runner.path(directory)):
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venv_cmd = [
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sys.executable, '-m', 'virtualenv',
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'{{prefix}}{0}'.format(directory)
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]
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if version != 'default':
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venv_cmd.extend(['-p', norm_version(version)])
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repo_cmd_runner.run(venv_cmd)
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with in_env(repo_cmd_runner, version):
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helpers.run_setup_cmd(
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repo_cmd_runner,
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('pip', 'install', '.') + additional_dependencies,
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)
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def run_hook(repo_cmd_runner, hook, file_args):
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with in_env(repo_cmd_runner, hook['language_version']):
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return xargs((hook['entry'],) + tuple(hook['args']), file_args)
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