# 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.
"""
import logging
import os
from subprocess
import CalledProcessError
from mozbuild.util
import memoize
from mozpack.path
import join
as join_path
from mozpack.path
import match
as mozpackmatch
from mozversioncontrol
import InvalidRepoPath, get_repository_object
from gecko_taskgraph
import GECKO
from gecko_taskgraph.util.hg
import get_json_pushchangedfiles
logger = logging.getLogger(__name__)
@memoize
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.
"""
try:
return get_json_pushchangedfiles(repository, revision)[
"files"]
except KeyError:
# We shouldn't hit this error in CI.
if os.environ.get(
"MOZ_AUTOMATION"):
raise
# We're likely on an unpublished commit, grab changed files from
# version control.
return get_locally_changed_files(GECKO)
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)
if "comm_head_repository" in params:
repository = params.get(
"comm_head_repository")
revision = params.get(
"comm_head_rev")
if not revision:
logger.warning(
"Missing `comm_head_rev` parameters; " "assuming all files have changed"
)
return True
changed_files |= {
join_path(
"comm", file)
for file
in get_changed_files(repository, revision)
}
for pattern
in file_patterns:
for path
in changed_files:
if mozpackmatch(path, pattern):
return True
return False
@memoize
def get_locally_changed_files(repo):
try:
vcs = get_repository_object(repo)
return set(vcs.get_outgoing_files(
"AM"))
except (InvalidRepoPath, CalledProcessError):
return set()