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import os
import logging
import argparse
from contextlib import contextmanager
import importlib
import sys
import hglib
from fluent.migrate.context import MigrationContext
from fluent.migrate.errors import MigrationError
from fluent.migrate.changesets import convert_blame_to_changesets
from fluent.migrate.blame import Blame
@contextmanager
def dont_write_bytecode():
_dont_write_bytecode = sys.dont_write_bytecode
sys.dont_write_bytecode = True
yield
sys.dont_write_bytecode = _dont_write_bytecode
class Migrator:
def __init__(self, locale, reference_dir, localization_dir, dry_run):
self.locale = locale
self.reference_dir = reference_dir
self.localization_dir = localization_dir
self.dry_run = dry_run
self._client = None
@property
def client(self):
if self._client is None:
self._client = hglib.open(self.localization_dir, 'utf-8')
return self._client
def close(self):
# close hglib.client, if we cached one.
if self._client is not None:
self._client.close()
def run(self, migration):
print('\nRunning migration {} for {}'.format(
migration.__name__, self.locale))
# For each migration create a new context.
ctx = MigrationContext(
self.locale, self.reference_dir, self.localization_dir
)
try:
# Add the migration spec.
migration.migrate(ctx)
except MigrationError as e:
print(' Skipping migration {} for {}:\n {}'.format(
migration.__name__, self.locale, e))
return
# Keep track of how many changesets we're committing.
index = 0
description_template = migration.migrate.__doc__
# Annotate localization files used as sources by this migration
# to preserve attribution of translations.
files = ctx.localization_resources.keys()
blame = Blame(self.client).attribution(files)
changesets = convert_blame_to_changesets(blame)
known_legacy_translations = set()
for changeset in changesets:
snapshot = self.snapshot(
ctx, changeset['changes'], known_legacy_translations
)
if not snapshot:
continue
self.serialize_changeset(snapshot)
index += 1
self.commit_changeset(
description_template, changeset['author'], index
)
def snapshot(self, ctx, changes_in_changeset, known_legacy_translations):
'''Run the migration for the changeset, with the set of
this and all prior legacy translations.
'''
known_legacy_translations.update(changes_in_changeset)
return ctx.serialize_changeset(
changes_in_changeset,
known_legacy_translations
)
def serialize_changeset(self, snapshot):
'''Write serialized FTL files to disk.'''
for path, content in snapshot.items():
fullpath = os.path.join(self.localization_dir, path)
print(f' Writing to {fullpath}')
if not self.dry_run:
fulldir = os.path.dirname(fullpath)
if not os.path.isdir(fulldir):
os.makedirs(fulldir)
with open(fullpath, 'wb') as f:
f.write(content.encode('utf8'))
f.close()
def commit_changeset(
self, description_template, author, index
):
message = description_template.format(
index=index,
author=author
)
print(f' Committing changeset: {message}')
if self.dry_run:
return
try:
self.client.commit(
message, user=author.encode('utf-8'), addremove=True
)
except hglib.error.CommandError as err:
print(f' WARNING: hg commit failed ({err})')
def main(locale, reference_dir, localization_dir, migrations, dry_run):
"""Run migrations and commit files with the result."""
migrator = Migrator(locale, reference_dir, localization_dir, dry_run)
for migration in migrations:
migrator.run(migration)
migrator.close()
def cli():
parser = argparse.ArgumentParser(
description='Migrate translations to FTL.'
)
parser.add_argument(
'migrations', metavar='MIGRATION', type=str, nargs='+',
help='migrations to run (Python modules)'
)
parser.add_argument(
'--locale', '--lang', type=str,
help='target locale code (--lang is deprecated)'
)
parser.add_argument(
'--reference-dir', type=str,
help='directory with reference FTL files'
)
parser.add_argument(
'--localization-dir', type=str,
help='directory for localization files'
)
parser.add_argument(
'--dry-run', action='store_true',
help='do not write to disk nor commit any changes'
)
parser.set_defaults(dry_run=False)
logger = logging.getLogger('migrate')
logger.setLevel(logging.INFO)
args = parser.parse_args()
# Don't byte-compile migrations.
# They're not our code, and infrequently run
with dont_write_bytecode():
migrations = map(importlib.import_module, args.migrations)
main(
locale=args.locale,
reference_dir=args.reference_dir,
localization_dir=args.localization_dir,
migrations=migrations,
dry_run=args.dry_run
)
if __name__ == '__main__':
cli()
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