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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
"""
Support for optimizing tasks based on the set of files that have changed.
"""
from __future__ import absolute_import, print_function, unicode_literals
import logging
import requests
from redo import retry
from mozpack.path import match as mozpackmatch
logger = logging.getLogger(__name__)
_cache = {}
def get_changed_files(repository, revision):
"""
Get the set of files changed in the push headed by the given revision.
Responses are cached, so multiple calls with the same arguments are OK.
"""
key = repository, revision
if key not in _cache:
url = '%s/json-automationrelevance/%s' % (repository.rstrip('/'), revision)
logger.debug("Querying version control for metadata: %s", url)
def get_automationrelevance():
response = requests.get(url, timeout=5)
return response.json()
contents = retry(get_automationrelevance, attempts=2, sleeptime=10)
logger.debug('{} commits influencing task scheduling:'
.format(len(contents['changesets'])))
changed_files = set()
for c in contents['changesets']:
logger.debug(" {cset} {desc}".format(
cset=c['node'][0:12],
desc=c['desc'].splitlines()[0].encode('ascii', 'ignore')))
changed_files |= set(c['files'])
_cache[key] = changed_files
return _cache[key]
def check(params, file_patterns):
"""Determine whether any of the files changed in the indicated push to
https://hg.mozilla.org match any of the given file patterns."""
repository = params.get('head_repository')
revision = params.get('head_rev')
if not repository or not revision:
logger.warning("Missing `head_repository` or `head_rev` parameters; "
"assuming all files have changed")
return True
changed_files = get_changed_files(repository, revision)
for pattern in file_patterns:
for path in changed_files:
if mozpackmatch(path, pattern):
return True
return False
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