644 lines
22 KiB
Python
644 lines
22 KiB
Python
from __future__ import print_function
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from functools import reduce
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from collections import namedtuple
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import getopt
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import gettext
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import operator
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import os
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import re
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import subprocess
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import sys
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import pprint
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try:
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import configparser
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except ImportError as e:
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import ConfigParser as configparser
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_ = gettext.gettext
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VERSION = '0.0.4'
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NAME = 'git-lint'
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OPTIONS_LIST = [
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('o', 'only', True,
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_('A comma-separated list of only those linters to run'), ['exclude']),
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('x', 'exclude', True,
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_('A comma-separated list of linters to skip'), []),
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('l', 'linters', False,
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_('Show the list of configured linters'), []),
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('b', 'base', False,
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_('Check all changed files in the repository, not just those in the current directory.'), []),
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('a', 'all', False,
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_('Scan all files in the repository, not just those that have changed.'), []),
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('e', 'every', False,
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_('Short for -b -a: scan everything'), []),
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('w', 'workspace', False,
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_('Scan the workspace'), ['staging']),
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('s', 'staging', False,
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_('Scan the staging area (useful for pre-commit).'), []),
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('g', 'changes', False,
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_("Report lint failures only for diff'd sections"), ['complete']),
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('p', 'complete', False,
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_('Report lint failures for all files'), []),
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('t', 'bylinter', False,
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_('Group the reports by linter first as they appear in the config file [default]'), []),
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('f', 'byfile', False,
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_('Group the reports by file first'), []),
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('d', 'dryrun', False,
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_('Dry run - report what would be done, but do not run linters'), []),
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('c', 'config', True,
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_('Path to config file'), []),
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('h', 'help', False,
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_('This help message'), []),
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('v', 'version', False,
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_('Version information'), [])
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]
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# ___ _ _ _
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# / __|___ _ __ _ __ __ _ _ _ __| | | | (_)_ _ ___
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# | (__/ _ \ ' \| ' \/ _` | ' \/ _` | | |__| | ' \/ -_)
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# \___\___/_|_|_|_|_|_\__,_|_||_\__,_| |____|_|_||_\___|
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#
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# This was a lot shorter and smarter in Hy...
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def make_rational_options(optlist, args):
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# OptionTupleList -> (getOptOptions -> dictionaryOfOptions)
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def make_options_rationalizer(optlist):
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"""Takes a list of option tuples, and returns a function that takes
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the output of getopt and reduces it to the longopt key and
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associated values as a dictionary.
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"""
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def make_opt_assoc(prefix, pos):
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def associater(acc, it):
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acc[(prefix + it[pos])] = it[1]
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return acc
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return associater
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short_opt_assoc = make_opt_assoc('-', 0)
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long_opt_assoc = make_opt_assoc('--', 1)
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def make_full_set(acc, i):
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return long_opt_assoc(short_opt_assoc(acc, i), i)
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fullset = reduce(make_full_set, optlist, {})
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def rationalizer(acc, it):
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acc[fullset[it[0]]] = it[1]
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return acc
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return rationalizer
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# (OptionTupleList, dictionaryOfOptions) -> (dictionaryOfOptions, excludedOptions)
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def remove_conflicted_options(optlist, request):
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"""Takes our list of option tuples, and a cleaned copy of what was
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requested from getopt, and returns a copy of the request
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without any options that are marked as superseded, along with
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the list of superseded options
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"""
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def get_excluded_keys(memo, opt):
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return memo + ((len(opt) > 4 and opt[4]) or [])
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keys = request.keys()
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marked = [option for option in optlist if option[1] in keys]
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exclude = reduce(get_excluded_keys, marked, [])
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excluded = [key for key in keys if key in exclude]
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cleaned = {key: request[key] for key in keys
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if key not in excluded}
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return (cleaned, excluded)
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def shortoptstogo(i):
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return i[0] + ((i[2] and ':') or '')
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def longoptstogo(i):
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return i[1] + ((i[2] and '=') or '')
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optstringsshort = ''.join([shortoptstogo(opt) for opt in optlist])
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optstringslong = [longoptstogo(opt) for opt in optlist]
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(options, filenames) = getopt.getopt(args[1:], optstringsshort,
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optstringslong)
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# Turns what getopt returns into something more human-readable
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rationalize_options = make_options_rationalizer(optlist)
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# Remove any options that are superseded by others.
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(retoptions, excluded) = remove_conflicted_options(
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optlist, reduce(rationalize_options, options, {}))
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return (retoptions, filenames, excluded)
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# ___ __ _ ___ _
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# / __|___ _ _ / _(_)__ _ | _ \___ __ _ __| |___ _ _
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# | (__/ _ \ ' \| _| / _` | | / -_) _` / _` / -_) '_|
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# \___\___/_||_|_| |_\__, | |_|_\___\__,_\__,_\___|_|
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# |___/
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def find_config_file(options, base):
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""" Returns the configuration file from a prioritized list of locations.
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Locations are prioritized as:
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1. From the command line. Fail if specified but not found
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2. The repository's root directory, as the file .git-lint
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3. The repository's root directory, as the file .git-lint/config
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4. The user's home directory, as file .git-lint
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5. The user's home directory, as the file .git-lint/config
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If no configuration file is found, this is an error.
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"""
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if 'config' in options:
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config = options['config']
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configpath = os.path.abspath(config)
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if not os.path.isfile(configpath):
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sys.exit(_('Configuration file not found: {}\n').format(config))
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return configpath
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home = os.path.join(os.environ.get('HOME'))
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possibles = (os.path.join(base, '.git-lint'),
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os.path.join(base, '.git-lint/config'),
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os.path.join(home, '.git-lint'),
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os.path.join(home, '.git-lint/config'))
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matches = [p for p in possibles if os.path.isfile(p)]
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if len(matches) == 0:
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sys.exit(_('No configuration file found'))
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return matches[0]
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# (commandLineDictionary, repositoryLocation) -> (configurationDictionary | exit)
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def get_config(options, base):
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"""Loads the git-lint configuration file.
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Returns the configuration file as a dictionary of dictionaries.
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Performs substitutions as specified in the SafeConfigParser
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specification; the only one performed currently is the 'repodir'
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will be replaced with the base directory of the repository.
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Combined with the option to specify the .git-lint configuration as
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a directory, this allows users to keep per-project configuration
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files for specific linters.
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"""
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Linter = namedtuple('Linter', ['name', 'linter'])
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path = find_config_file(options, base)
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configloader = configparser.SafeConfigParser()
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configloader.read(path)
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configloader.set('DEFAULT', 'repodir', base)
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return [Linter(section, {k: v for (k, v) in configloader.items(section)})
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for section in configloader.sections()]
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# ___ _ _
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# / __(_) |_
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# | (_ | | _|
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# \___|_|\__|
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#
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def get_git_response_raw(cmd):
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fullcmd = (['git'] + cmd)
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process = subprocess.Popen(fullcmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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universal_newlines=True)
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(out, err) = process.communicate()
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return (out, err, process.returncode)
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def get_git_response(cmd):
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(out, error, returncode) = get_git_response_raw(cmd)
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return out
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def split_git_response(cmd):
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(out, error, returncode) = get_git_response_raw(cmd)
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return out.splitlines()
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def run_git_command(cmd):
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fullcmd = (['git'] + cmd)
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return subprocess.call(fullcmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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universal_newlines=True)
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def get_shell_response(fullcmd):
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process = subprocess.Popen(fullcmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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shell=True,
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universal_newlines=True)
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(out, err) = process.communicate()
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return (out, err, process.returncode)
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def get_git_base():
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(out, error, returncode) = get_git_response_raw(
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['rev-parse', '--show-toplevel'])
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return (returncode == 0 and out.rstrip()) or None
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def get_git_head():
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empty_repository_hash = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'
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(out, err, returncode) = get_git_response_raw(
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['rev-parse', '--verify HEAD'])
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return ((err and empty_repository_hash) or 'HEAD')
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git_base = get_git_base()
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git_head = get_git_head()
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# _ _ _ _ _ _ _ _
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# | | | | |_(_) (_) |_(_)___ ___
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# | |_| | _| | | | _| / -_|_-<
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# \___/ \__|_|_|_|\__|_\___/__/
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#
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def base_file_cleaner(files):
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return [file.replace(git_base + '/', '', 1) for file in files]
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def make_match_filter_matcher(extensions):
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trimmed = [s.strip() for s in reduce(operator.add,
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[ex.split(',') for ex in extensions], [])]
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cleaned = [re.sub(r'^\.', '', s) for s in trimmed]
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return re.compile(r'\.' + '|'.join(cleaned) + r'$')
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def make_match_filter(config):
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matcher = make_match_filter_matcher([v.linter.get('match', '') for v in config])
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def match_filter(path):
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return matcher.search(path)
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return match_filter
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# ICK. Mutation, references, and hidden assignment.
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def group_by(iterable, field_id):
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results = []
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keys = {}
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for obj in iterable:
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key = obj[field_id]
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if key in keys:
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keys[key].append(obj)
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continue
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keys[key] = [obj]
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results.append((key, keys[key]))
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return results
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# ___ _ _ _ _ _
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# / __| |_ ___ __| |__ | (_)_ _| |_ ___ _ _ ___
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# | (__| ' \/ -_) _| / / | | | ' \ _/ -_) '_(_-<
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# \___|_||_\___\__|_\_\ |_|_|_||_\__\___|_| /__/
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#
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def executable_exists(script, label):
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if not len(script):
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sys.exit(
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_('Syntax error in command configuration for {} ').format(label))
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scriptname = script.split(' ').pop(0)
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if not len(scriptname):
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sys.exit(
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_('Syntax error in command configuration for {} ').format(label))
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def is_executable(path):
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return os.path.exists(path) and os.access(path, os.X_OK)
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if scriptname.startswith('/'):
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return (is_executable(scriptname) and scriptname) or None
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possibles = [path for path in
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[os.path.join(path, scriptname)
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for path in os.environ.get('PATH').split(':')]
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if is_executable(path)]
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return (len(possibles) and possibles.pop(0)) or False
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def get_working_linter_names(config):
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return [i.name for i in config
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if executable_exists(i.linter['command'], i.name)]
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def get_linter_status(config):
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working_linter_names = get_working_linter_names(config)
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broken_linter_names = (set([i.name for i in config]) - set(working_linter_names))
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return working_linter_names, broken_linter_names
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def print_linters(config):
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print(_('Currently supported linters:'))
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working_linter_names, broken_linter_names = get_linter_status(config)
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for linter in config:
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print('{:<14} {}'.format(linter.name,
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((linter.name in broken_linter_names and
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_('(WARNING: executable not found)') or
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linter.linter.get('comment', '')))))
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# ___ _ _ _ _ __ __ _ _
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# / __|___| |_ | (_)__| |_ ___ / _| / _(_) |___ ___
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# | (_ / -_) _| | | (_-< _| / _ \ _| | _| | / -_|_-<
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# \___\___|\__| |_|_/__/\__| \___/_| |_| |_|_\___/__/
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#
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def get_filelist(cmdline, extras):
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""" Returns the list of files against which we'll run the linters. """
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def base_file_filter(files):
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""" Return the full path for all files """
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return [os.path.join(git_base, file) for file in files]
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def cwd_file_filter(files):
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""" Return the full path for only those files in the cwd and down """
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gitcwd = os.path.join(os.path.relpath(os.getcwd(), git_base), '')
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return base_file_filter([file for file in files
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if file.startswith(gitcwd)])
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def check_for_conflicts(filesets):
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""" Scan list of porcelain files for merge conflic state. """
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MERGE_CONFLICT_PAIRS = set(['DD', 'DU', 'AU', 'AA', 'UD', 'UA', 'UU'])
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status_pairs = set(['' + f[0] + f[1] for f in filesets])
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if len(status_pairs & MERGE_CONFLICT_PAIRS):
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sys.exit(
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_('Current repository contains merge conflicts. Linters will not be run.'))
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return filesets
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def remove_submodules(files):
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""" Remove all submodules from the list of files git-lint cares about. """
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fixer_re = re.compile('^(\\.\\.\\/)+')
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submodules = split_git_response(['submodule', 'status'])
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submodule_names = [fixer_re.sub('', submodule.split(' ')[2])
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for submodule in submodules]
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return [file for file in files if (file not in submodule_names)]
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def get_porcelain_status():
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""" Return the status of all files in the system. """
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cmd = ['status', '-z', '--porcelain',
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'--untracked-files=all', '--ignore-submodules=all']
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stream = [entry for entry in get_git_response(cmd).split(u'\x00')
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if len(entry) > 0]
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def parse_stream(acc, stream):
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"""Parse the list of files. T
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The list is null-terminated, but is not columnar. If
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there's an 'R' in the index state, it means the file was
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renamed and the old name is added as a column, so it's a
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special case as we accumulate the list of files.
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"""
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if len(stream) == 0:
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return acc
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entry = stream.pop(0)
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(index, workspace, filename) = (entry[0], entry[1], entry[3:])
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if index == 'R':
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stream.pop(0)
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return parse_stream(acc + [(index, workspace, filename)], stream)
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return check_for_conflicts(parse_stream([], stream))
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def staging_list():
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""" Return the list of files added or modified to the stage """
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return [filename for (index, workspace, filename) in get_porcelain_status()
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if index in ['A', 'M']]
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def working_list():
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""" Return the list of files that have been modified in the workspace.
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Includes the '?' to include files that git is not currently tracking.
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"""
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return [filename for (index, workspace, filename) in get_porcelain_status()
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if workspace in ['A', 'M', '?']]
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def all_list():
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""" Return all the files git is currently tracking for this repository. """
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cmd = ['ls-tree', '--name-only', '--full-tree', '-r', '-z', git_head]
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return [file for file in get_git_response(cmd).split(u'\x00')
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if len(file) > 0]
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if len(extras):
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cwd = os.path.abspath(os.getcwd())
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extras_fullpathed = set([os.path.abspath(os.path.join(cwd, f)) for f in extras])
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not_found = set([f for f in extras_fullpathed if not os.path.isfile(f)])
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return ([os.path.relpath(f, cwd) for f in (extras_fullpathed - not_found)], not_found)
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working_directory_trans = cwd_file_filter
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if 'base' in cmdline or 'every' in cmdline:
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working_directory_trans = base_file_filter
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file_list_generator = working_list
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if 'all' in cmdline:
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file_list_generator = all_list
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if 'staging' in cmdline:
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file_list_generator = staging_list
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return (working_directory_trans(remove_submodules(file_list_generator())), [])
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# ___ _ _
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# / __| |_ __ _ __ _(_)_ _ __ _ __ __ ___ _ __ _ _ __ _ __ ___ _ _
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# \__ \ _/ _` / _` | | ' \/ _` | \ V V / '_/ _` | '_ \ '_ \/ -_) '_|
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# |___/\__\__,_\__, |_|_||_\__, | \_/\_/|_| \__,_| .__/ .__/\___|_|
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# |___/ |___/ |_| |_|
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def pick_stash_runner(cmdline):
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"""Choose a runner.
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This is the operation that will run the linters. It exists to
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provide a way to stash the repository, then restore it when
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complete. If possible, it attempts to restore the access and
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modification times of the file in order to comfort IDEs that are
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constantly monitoring file times.
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"""
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def staging_wrapper(run_linters, filenames):
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def time_gather(f):
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stats = os.stat(f)
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return (f, (stats.st_atime, stats.st_mtime))
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times = [time_gather(file) for file in filenames]
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run_git_command(['stash', '--keep-index'])
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results = run_linters()
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run_git_command(['reset', '--hard'])
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run_git_command(['stash', 'pop', '--quiet', '--index'])
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for (filename, timepair) in times:
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os.utime(filename, timepair)
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return results
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def workspace_wrapper(run_linters, filenames):
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return run_linters()
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return ('staging' in cmdline and staging_wrapper) or workspace_wrapper
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# ___ _ _ _
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# | _ \_ _ _ _ | (_)_ _| |_ _ __ __ _ ______
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# | / || | ' \ | | | ' \ _| | '_ \/ _` (_-<_-<
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# |_|_\\_,_|_||_| |_|_|_||_\__| | .__/\__,_/__/__/
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# |_|
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def run_external_linter(filename, linter, linter_name):
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"""Run one linter against one file.
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If the result matches the error condition specified in the
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configuration file, return the error code and messages, either
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return nothing.
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"""
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def encode_shell_messages(prefix, messages):
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return ['{}{}'.format(prefix, line)
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for line in messages.splitlines()]
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cmd = linter['command'] + ' "' + filename + '"'
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(out, err, returncode) = get_shell_response(cmd)
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failed = ((out and (linter.get('condition', 'error') == 'output')) or err or (not (returncode == 0)))
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trimmed_filename = filename.replace(git_base + '/', '', 1)
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if not failed:
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return (trimmed_filename, linter_name, 0, [])
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prefix = ((linter.get('print', 'false').strip().lower() != 'true') and ' ') or ' {}: '.format(trimmed_filename)
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output = base_file_cleaner(encode_shell_messages(prefix, out) + ((err and encode_shell_messages(prefix, err)) or []))
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return (trimmed_filename, linter_name, (returncode or 1), output)
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def run_one_linter(linter, filenames):
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""" Runs one linter against a set of files
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Creates a match filter for the linter, extract the files to be
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linted, and runs the linter against each file, returning the
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result as a list of successes and failures. Failures have a
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return code and the output of the lint process.
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"""
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match_filter = make_match_filter([linter])
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files = set([file for file in filenames if match_filter(file)])
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return [run_external_linter(file, linter.linter, linter.name) for file in files]
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def build_lint_runner(linters, filenames):
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""" Returns a function to run a set of linters against a set of filenames
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This returns a function because it's going to be wrapped in a
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runner to better handle stashing and restoring a staged commit.
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"""
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def lint_runner():
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return reduce(operator.add,
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[run_one_linter(linter, filenames) for linter in linters], [])
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return lint_runner
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# __ __ _
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# | \/ |__ _(_)_ _
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# | |\/| / _` | | ' \
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# |_| |_\__,_|_|_||_|
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#
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def print_report(results, config):
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sort_position = 1
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grouping = 'Linter: {}'
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if 'byfile' in config:
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sort_position = 0
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grouping = 'Filename: {}'
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grouped_results = group_by(results, sort_position)
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for group in grouped_results:
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print(grouping.format(group[0]))
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for (filename, lintername, returncode, text) in group[1]:
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print("\n".join(text))
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print("")
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def run_gitlint(cmdline, config, extras):
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def build_config_subset(keys):
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""" Returns a subset of the configuration, with only those linters mentioned in keys """
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return [item for item in config if item.name in keys]
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""" Runs the requested linters """
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all_filenames, unfindable_filenames = get_filelist(cmdline, extras)
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stash_runner = pick_stash_runner(cmdline)
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is_lintable = make_match_filter(config)
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lintable_filenames = set([filename for filename in all_filenames
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if is_lintable(filename)])
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unlintable_filenames = set(all_filenames) - lintable_filenames
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working_linter_names, broken_linter_names = get_linter_status(config)
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cant_lint_filter = make_match_filter(build_config_subset(
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broken_linter_names))
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cant_lint_filenames = [filename for filename in lintable_filenames
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if cant_lint_filter(filename)]
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if 'dryrun' in cmdline:
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return dryrun(
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build_config_subset(working_linter_names), sorted(lintable_filenames))
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lint_runner = build_lint_runner(
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build_config_subset(working_linter_names), sorted(lintable_filenames))
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results = stash_runner(lint_runner, lintable_filenames)
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print_report(results, cmdline)
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if not len(results):
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return 0
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return max([i[2] for i in results if len(i)])
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def print_help(options_list, name):
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print(_('Usage: {} [options] [filenames]').format(name))
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for item in options_list:
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print(' -{:<1} --{:<12} {}'.format(item[0], item[1], item[3]))
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return sys.exit()
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def print_version(name, version):
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print('{} {} Copyright (c) 2009, 2016 Kennth M. "Elf" Sternberg'.format(name, version))
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def main(*args):
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if git_base is None:
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sys.exit(_('A git repository was not found.'))
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(cmdline, filenames, excluded_commands) = make_rational_options(OPTIONS_LIST, args)
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if len(excluded_commands) > 0:
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print(_('These command line options were ignored due to option precedence.'))
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for exc in excluded_commands:
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print("\t{}".format(exc))
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try:
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config = get_config(cmdline, git_base)
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if 'help' in cmdline:
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print_help(OPTIONS_LIST, NAME)
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return 0
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if 'version' in cmdline:
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print_version(NAME, VERSION)
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return 0
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if 'linters' in cmdline:
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print_linters(config)
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return 0
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return run_gitlint(cmdline, config, filenames)
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except getopt.GetoptError as err:
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print_help(OPTIONS_LIST)
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return 1
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if __name__ == '__main__':
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import sys
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sys.exit(main(*sys.argv))
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