mirror of
https://github.com/pre-commit/pre-commit.git
synced 2026-01-14 13:00:10 -06:00
100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
from __future__ import absolute_import
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from __future__ import unicode_literals
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import hashlib
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import os
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from pre_commit import five
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from pre_commit.languages import helpers
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from pre_commit.util import CalledProcessError
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from pre_commit.util import clean_path_on_failure
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from pre_commit.util import cmd_output
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from pre_commit.xargs import xargs
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ENVIRONMENT_DIR = 'docker'
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PRE_COMMIT_LABEL = 'PRE_COMMIT'
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def md5(s): # pragma: windows no cover
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return hashlib.md5(five.to_bytes(s)).hexdigest()
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def docker_tag(repo_cmd_runner): # pragma: windows no cover
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return 'pre-commit-{}'.format(
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md5(os.path.basename(repo_cmd_runner.path()))
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).lower()
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def docker_is_running(): # pragma: windows no cover
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try:
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return cmd_output('docker', 'ps')[0] == 0
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except CalledProcessError:
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return False
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def assert_docker_available(): # pragma: windows no cover
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assert docker_is_running(), (
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'Docker is either not running or not configured in this environment'
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)
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def build_docker_image(repo_cmd_runner, **kwargs): # pragma: windows no cover
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pull = kwargs.pop('pull')
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assert not kwargs, kwargs
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cmd = (
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'docker', 'build',
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'--tag', docker_tag(repo_cmd_runner),
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'--label', PRE_COMMIT_LABEL,
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)
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if pull:
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cmd += ('--pull',)
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# This must come last for old versions of docker. See #477
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cmd += ('.',)
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helpers.run_setup_cmd(repo_cmd_runner, cmd)
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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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): # pragma: windows no cover
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assert repo_cmd_runner.exists('Dockerfile'), (
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'No Dockerfile was found in the hook repository'
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)
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helpers.assert_version_default('docker', version)
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helpers.assert_no_additional_deps('docker', additional_dependencies)
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assert_docker_available()
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directory = repo_cmd_runner.path(
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helpers.environment_dir(ENVIRONMENT_DIR, 'default'),
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)
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# Docker doesn't really have relevant disk environment, but pre-commit
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# still needs to cleanup it's state files on failure
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with clean_path_on_failure(directory):
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build_docker_image(repo_cmd_runner, pull=True)
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os.mkdir(directory)
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def run_hook(repo_cmd_runner, hook, file_args): # pragma: windows no cover
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assert_docker_available()
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# Rebuild the docker image in case it has gone missing, as many people do
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# automated cleanup of docker images.
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build_docker_image(repo_cmd_runner, pull=False)
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hook_cmd = helpers.to_cmd(hook)
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entry_executable, cmd_rest = hook_cmd[0], hook_cmd[1:]
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cmd = (
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'docker', 'run',
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'--rm',
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'-u', '{}:{}'.format(os.getuid(), os.getgid()),
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'-v', '{}:/src:rw'.format(os.getcwd()),
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'--workdir', '/src',
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'--entrypoint', entry_executable,
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docker_tag(repo_cmd_runner)
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) + cmd_rest
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return xargs(cmd, file_args)
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