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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/.
import json
import os
import re
import sys
from collections import defaultdict
import mozpack.path as mozpath
import taskgraph
from mach.util import get_state_dir
from mozbuild.base import MozbuildObject
from mozpack.files import FileFinder
from moztest.resolve import TestManifestLoader, TestResolver, get_suite_definition
from taskgraph.generator import TaskGraphGenerator
from taskgraph.parameters import ParameterMismatch, parameters_loader
from taskgraph.taskgraph import TaskGraph
here = os.path.abspath(os.path.dirname(__file__))
build = MozbuildObject.from_environment(cwd=here)
PARAMETER_MISMATCH = """
ERROR - The parameters being used to generate tasks differ from those expected
by your working copy:
{}
To fix this, either rebase onto the latest mozilla-central or pass in
-p/--parameters. For more information on how to define parameters, see:
https://firefox-source-docs.mozilla.org/taskcluster/taskcluster/mach.html#parameters
"""
def invalidate(cache):
try:
cmod = os.path.getmtime(cache)
except OSError as e:
# File does not exist. We catch OSError rather than use `isfile`
# because the recommended watchman hook could possibly invalidate the
# cache in-between the check to `isfile` and the call to `getmtime`
# below.
if e.errno == 2:
return
raise
tc_dir = os.path.join(build.topsrcdir, "taskcluster")
tmod = max(os.path.getmtime(os.path.join(tc_dir, p)) for p, _ in FileFinder(tc_dir))
if tmod > cmod:
os.remove(cache)
def cache_key(attr, params, disable_target_task_filter):
key = attr
if params and params["project"] not in ("autoland", "mozilla-central"):
key += f"-{params['project']}"
if disable_target_task_filter and "full" not in attr:
key += "-uncommon"
return key
def generate_tasks(params=None, full=False, disable_target_task_filter=False):
attr = "full_task_set" if full else "target_task_set"
target_tasks_method = (
"try_select_tasks"
if not disable_target_task_filter
else "try_select_tasks_uncommon"
)
params = parameters_loader(
params,
strict=False,
overrides={
"try_mode": "try_select",
"target_tasks_method": target_tasks_method,
},
)
root = os.path.join(build.topsrcdir, "taskcluster", "ci")
taskgraph.fast = True
generator = TaskGraphGenerator(root_dir=root, parameters=params)
def add_chunk_patterns(tg):
for task_name, task in tg.tasks.items():
chunk_index = -1
if task_name.endswith("-cf"):
chunk_index = -2
chunks = task.task.get("extra", {}).get("chunks", {})
if isinstance(chunks, int):
task.chunk_pattern = "{}-*/{}".format(
"-".join(task_name.split("-")[:chunk_index]), chunks
)
else:
assert isinstance(chunks, dict)
if chunks.get("total", 1) == 1:
task.chunk_pattern = task_name
else:
task.chunk_pattern = "{}-*".format(
"-".join(task_name.split("-")[:chunk_index])
)
return tg
cache_dir = os.path.join(
get_state_dir(specific_to_topsrcdir=True), "cache", "taskgraph"
)
key = cache_key(attr, generator.parameters, disable_target_task_filter)
cache = os.path.join(cache_dir, key)
invalidate(cache)
if os.path.isfile(cache):
with open(cache) as fh:
return add_chunk_patterns(TaskGraph.from_json(json.load(fh))[1])
if not os.path.isdir(cache_dir):
os.makedirs(cache_dir)
print("Task configuration changed, generating {}".format(attr.replace("_", " ")))
cwd = os.getcwd()
os.chdir(build.topsrcdir)
def generate(attr):
try:
tg = getattr(generator, attr)
except ParameterMismatch as e:
print(PARAMETER_MISMATCH.format(e.args[0]))
sys.exit(1)
# write cache
key = cache_key(attr, generator.parameters, disable_target_task_filter)
with open(os.path.join(cache_dir, key), "w") as fh:
json.dump(tg.to_json(), fh)
return add_chunk_patterns(tg)
# Cache both full_task_set and target_task_set regardless of whether or not
# --full was requested. Caching is cheap and can potentially save a lot of
# time.
tg_full = generate("full_task_set")
tg_target = generate("target_task_set")
# discard results from these, we only need cache.
if full:
generate("full_task_graph")
generate("target_task_graph")
os.chdir(cwd)
if full:
return tg_full
return tg_target
def filter_tasks_by_paths(tasks, paths):
resolver = TestResolver.from_environment(cwd=here, loader_cls=TestManifestLoader)
run_suites, run_tests = resolver.resolve_metadata(paths)
flavors = {(t["flavor"], t.get("subsuite")) for t in run_tests}
task_regexes = set()
for flavor, subsuite in flavors:
_, suite = get_suite_definition(flavor, subsuite, strict=True)
if "task_regex" not in suite:
print(
"warning: no tasks could be resolved from flavor '{}'{}".format(
flavor, " and subsuite '{}'".format(subsuite) if subsuite else ""
)
)
continue
task_regexes.update(suite["task_regex"])
def match_task(task):
return any(re.search(pattern, task) for pattern in task_regexes)
return {
task_name: task for task_name, task in tasks.items() if match_task(task_name)
}
def resolve_tests_by_suite(paths):
resolver = TestResolver.from_environment(cwd=here, loader_cls=TestManifestLoader)
_, run_tests = resolver.resolve_metadata(paths)
suite_to_tests = defaultdict(list)
# A dictionary containing all the input paths that we haven't yet
# assigned to a specific test flavor.
remaining_paths_by_suite = defaultdict(lambda: set(paths))
for test in run_tests:
key, _ = get_suite_definition(test["flavor"], test.get("subsuite"), strict=True)
test_path = test.get("srcdir_relpath")
if test_path is None:
continue
found_path = None
manifest_relpath = None
if "manifest_relpath" in test:
manifest_relpath = mozpath.normpath(test["manifest_relpath"])
for path in remaining_paths_by_suite[key]:
if test_path.startswith(path) or manifest_relpath == path:
found_path = path
break
if found_path:
suite_to_tests[key].append(found_path)
remaining_paths_by_suite[key].remove(found_path)
return suite_to_tests
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