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import codecs
import glob
import os
from import BaseCommand, CommandError
from import find_command, popen_wrapper
def has_bom(fn):
with open(fn, 'rb') as f:
sample =
return sample.startswith((codecs.BOM_UTF8, codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE))
def is_writable(path):
# Known side effect: updating file access/modified time to current time if
# it is writable.
with open(path, 'a'):
os.utime(path, None)
except (IOError, OSError):
return False
return True
class Command(BaseCommand):
help = 'Compiles .po files to .mo files for use with builtin gettext support.'
requires_system_checks = False
leave_locale_alone = True
program = 'msgfmt'
program_options = ['--check-format']
def add_arguments(self, parser):
'--locale', '-l', dest='locale', action='append', default=[],
help='Locale(s) to process (e.g. de_AT). Default is to process all. '
'Can be used multiple times.',
'--exclude', '-x', dest='exclude', action='append', default=[],
help='Locales to exclude. Default is none. Can be used multiple times.',
'--use-fuzzy', '-f', dest='fuzzy', action='store_true',
help='Use fuzzy translations.',
def handle(self, **options):
locale = options['locale']
exclude = options['exclude']
self.verbosity = options['verbosity']
if options['fuzzy']:
self.program_options = self.program_options + ['-f']
if find_command(self.program) is None:
raise CommandError("Can't find %s. Make sure you have GNU gettext "
"tools 0.15 or newer installed." % self.program)
basedirs = [os.path.join('conf', 'locale'), 'locale']
if os.environ.get('DJANGO_SETTINGS_MODULE'):
from django.conf import settings
# Walk entire tree, looking for locale directories
for dirpath, dirnames, filenames in os.walk('.', topdown=True):
for dirname in dirnames:
if dirname == 'locale':
basedirs.append(os.path.join(dirpath, dirname))
# Gather existing directories.
basedirs = set(map(os.path.abspath, filter(os.path.isdir, basedirs)))
if not basedirs:
raise CommandError("This script should be run from the Django Git "
"checkout or your project or app tree, or with "
"the settings module specified.")
# Build locale list
all_locales = []
for basedir in basedirs:
locale_dirs = filter(os.path.isdir, glob.glob('%s/*' % basedir))
all_locales.extend(map(os.path.basename, locale_dirs))
# Account for excluded locales
locales = locale or all_locales
locales = set(locales).difference(exclude)
for basedir in basedirs:
if locales:
dirs = [os.path.join(basedir, l, 'LC_MESSAGES') for l in locales]
dirs = [basedir]
locations = []
for ldir in dirs:
for dirpath, dirnames, filenames in os.walk(ldir):
locations.extend((dirpath, f) for f in filenames if f.endswith('.po'))
if locations:
def compile_messages(self, locations):
Locations is a list of tuples: [(directory, file), ...]
for i, (dirpath, f) in enumerate(locations):
if self.verbosity > 0:
self.stdout.write('processing file %s in %s\n' % (f, dirpath))
po_path = os.path.join(dirpath, f)
if has_bom(po_path):
raise CommandError("The %s file has a BOM (Byte Order Mark). "
"Django only supports .po files encoded in "
"UTF-8 and without any BOM." % po_path)
base_path = os.path.splitext(po_path)[0]
# Check writability on first location
if i == 0 and not is_writable(base_path + '.mo'):
self.stderr.write("The po files under %s are in a seemingly not writable location. "
"mo files will not be updated/created." % dirpath)
args = [self.program] + self.program_options + [
'-o', base_path + '.mo', base_path + '.po'
output, errors, status = popen_wrapper(args)
if status:
if errors:
msg = "Execution of %s failed: %s" % (self.program, errors)
msg = "Execution of %s failed" % self.program
raise CommandError(msg)