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87 lines
2.5 KiB
Python
87 lines
2.5 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.languages import helpers
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from pre_commit.util import clean_path_on_failure
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from pre_commit.util import shell_escape
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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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if os.name == 'nt': # pragma: no cover (windows)
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return os.path.join(venv, 'Scripts')
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else:
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return os.path.join(venv, 'bin')
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class PythonEnv(helpers.Environment):
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@property
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def env_prefix(self):
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return ". '{{prefix}}{0}{1}activate' &&".format(
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bin_dir(
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helpers.environment_dir(ENVIRONMENT_DIR, self.language_version)
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),
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os.sep,
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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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yield PythonEnv(repo_cmd_runner, language_version)
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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=None,
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):
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assert repo_cmd_runner.exists('setup.py')
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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) as env:
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env.run("cd '{prefix}' && pip install .", encoding=None)
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if additional_dependencies:
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env.run(
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"cd '{prefix}' && pip install " +
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' '.join(
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shell_escape(dep) for dep in additional_dependencies
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),
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encoding=None,
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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']) as env:
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return helpers.run_hook(env, hook, file_args)
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