Move commands into their own files.

pre_commit/commands/run.py

@@ -0,0 +1,145 @@
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import logging
+import os
+import sys
+
+from pre_commit import git
+from pre_commit import color
+from pre_commit.logging_handler import LoggingHandler
+from pre_commit.output import get_hook_message
+from pre_commit.staged_files_only import staged_files_only
+from pre_commit.util import noop_context
+
+
+logger = logging.getLogger('pre_commit')
+
+
+def _get_skips(environ):
+    skips = environ.get('SKIP', '')
+    return set(skip.strip() for skip in skips.split(',') if skip.strip())
+
+
+def _hook_msg_start(hook, verbose):
+    return '{0}{1}'.format(
+        '[{0}] '.format(hook['id']) if verbose else '',
+        hook['name'],
+    )
+
+
+def _print_no_files_skipped(hook, write, args):
+    write(get_hook_message(
+        _hook_msg_start(hook, args.verbose),
+        postfix='(no files to check) ',
+        end_msg='Skipped',
+        end_color=color.TURQUOISE,
+        use_color=args.color,
+    ))
+
+
+def _print_user_skipped(hook, write, args):
+    write(get_hook_message(
+        _hook_msg_start(hook, args.verbose),
+        end_msg='Skipped',
+        end_color=color.YELLOW,
+        use_color=args.color,
+    ))
+
+
+def _run_single_hook(runner, repository, hook_id, args, write, skips=set()):
+    if args.all_files:
+        get_filenames = git.get_all_files_matching
+    elif git.is_in_merge_conflict():
+        get_filenames = git.get_conflicted_files_matching
+    else:
+        get_filenames = git.get_staged_files_matching
+
+    hook = repository.hooks[hook_id]
+
+    filenames = get_filenames(hook['files'], hook['exclude'])
+    if hook_id in skips:
+        _print_user_skipped(hook, write, args)
+        return 0
+    elif not filenames:
+        _print_no_files_skipped(hook, write, args)
+        return 0
+
+    # Print the hook and the dots first in case the hook takes hella long to
+    # run.
+    write(get_hook_message(_hook_msg_start(hook, args.verbose), end_len=6))
+    sys.stdout.flush()
+
+    retcode, stdout, stderr = repository.run_hook(hook_id, filenames)
+
+    if retcode != repository.hooks[hook_id]['expected_return_value']:
+        retcode = 1
+        print_color = color.RED
+        pass_fail = 'Failed'
+    else:
+        retcode = 0
+        print_color = color.GREEN
+        pass_fail = 'Passed'
+
+    write(color.format_color(pass_fail, print_color, args.color) + '\n')
+
+    if (stdout or stderr) and (retcode or args.verbose):
+        write('\n')
+        for output in (stdout, stderr):
+            if output.strip():
+                write(output.strip() + '\n')
+        write('\n')
+
+    return retcode
+
+
+def _run_hooks(runner, args, write, environ):
+    """Actually run the hooks."""
+    retval = 0
+
+    skips = _get_skips(environ)
+
+    for repo in runner.repositories:
+        for hook_id in repo.hooks:
+            retval |= _run_single_hook(
+                runner, repo, hook_id, args, write, skips=skips,
+            )
+
+    return retval
+
+
+def _run_hook(runner, args, write):
+    hook_id = args.hook
+    for repo in runner.repositories:
+        if hook_id in repo.hooks:
+            return _run_single_hook(runner, repo, hook_id, args, write=write)
+    else:
+        write('No hook with id `{0}`\n'.format(hook_id))
+        return 1
+
+
+def _has_unmerged_paths(runner):
+    _, stdout, _ = runner.cmd_runner.run(['git', 'ls-files', '--unmerged'])
+    return bool(stdout.strip())
+
+
+def run(runner, args, write=sys.stdout.write, environ=os.environ):
+    # Set up our logging handler
+    logger.addHandler(LoggingHandler(args.color, write=write))
+    logger.setLevel(logging.INFO)
+
+    # Check if we have unresolved merge conflict files and fail fast.
+    if _has_unmerged_paths(runner):
+        logger.error('Unmerged files.  Resolve before committing.')
+        return 1
+
+    if args.no_stash or args.all_files:
+        ctx = noop_context()
+    else:
+        ctx = staged_files_only(runner.cmd_runner)
+
+    with ctx:
+        if args.hook:
+            return _run_hook(runner, args, write=write)
+        else:
+            return _run_hooks(runner, args, write=write, environ=environ)