taskcluster/gecko_taskgraph/files_changed.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 """
   6 Support for optimizing tasks based on the set of files that have changed.
   7 """
   8
   9 import logging
  10 import os
  11 from subprocess import CalledProcessError
  12
  13 from mozbuild.util import memoize
  14 from mozpack.path import join as join_path
  15 from mozpack.path import match as mozpackmatch
  16 from mozversioncontrol import InvalidRepoPath, get_repository_object
  17
  18 from gecko_taskgraph import GECKO
  19 from gecko_taskgraph.util.hg import get_json_pushchangedfiles
  20
  21 logger = logging.getLogger(__name__)
  22
  23
  24 @memoize
  25 def get_changed_files(repository, revision):
  26     """
  27     Get the set of files changed in the push headed by the given revision.
  28     Responses are cached, so multiple calls with the same arguments are OK.
  29     """
  30     try:
  31         return get_json_pushchangedfiles(repository, revision)["files"]
  32     except KeyError:
  33         # We shouldn't hit this error in CI.
  34         if os.environ.get("MOZ_AUTOMATION"):
  35             raise
  36
  37         # We're likely on an unpublished commit, grab changed files from
  38         # version control.
  39         return get_locally_changed_files(GECKO)
  40
  41
  42 def check(params, file_patterns):
  43     """Determine whether any of the files changed in the indicated push to
  44     https://hg.mozilla.org match any of the given file patterns."""
  45     repository = params.get("head_repository")
  46     revision = params.get("head_rev")
  47     if not repository or not revision:
  48         logger.warning(
  49             "Missing `head_repository` or `head_rev` parameters; "
  50             "assuming all files have changed"
  51         )
  52         return True
  53
  54     changed_files = get_changed_files(repository, revision)
  55
  56     if "comm_head_repository" in params:
  57         repository = params.get("comm_head_repository")
  58         revision = params.get("comm_head_rev")
  59         if not revision:
  60             logger.warning(
  61                 "Missing `comm_head_rev` parameters; " "assuming all files have changed"
  62             )
  63             return True
  64
  65         changed_files |= {
  66             join_path("comm", file) for file in get_changed_files(repository, revision)
  67         }
  68
  69     for pattern in file_patterns:
  70         for path in changed_files:
  71             if mozpackmatch(path, pattern):
  72                 return True
  73
  74     return False
  75
  76
  77 @memoize
  78 def get_locally_changed_files(repo):
  79     try:
  80         vcs = get_repository_object(repo)
  81         return set(vcs.get_outgoing_files("AM"))
  82     except (InvalidRepoPath, CalledProcessError):
  83         return set()