forked from mirrors/gecko-dev
86 lines
3.3 KiB
Python
86 lines
3.3 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import hashlib
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import time
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TARGET_CACHE_INDEX = "{cache_prefix}.cache.level-{level}.{type}.{name}.hash.{digest}"
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EXTRA_CACHE_INDEXES = [
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"{cache_prefix}.cache.level-{level}.{type}.{name}.latest",
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"{cache_prefix}.cache.level-{level}.{type}.{name}.pushdate.{build_date_long}",
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]
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def add_optimization(
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config, taskdesc, cache_type, cache_name, digest=None, digest_data=None
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):
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"""
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Allow the results of this task to be cached. This adds index routes to the
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task so it can be looked up for future runs, and optimization hints so that
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cached artifacts can be found. Exactly one of `digest` and `digest_data`
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must be passed.
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:param TransformConfig config: The configuration for the kind being transformed.
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:param dict taskdesc: The description of the current task.
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:param str cache_type: The type of task result being cached.
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:param str cache_name: The name of the object being cached.
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:param digest: A unique string identifying this version of the artifacts
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being generated. Typically this will be the hash of inputs to the task.
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:type digest: bytes or None
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:param digest_data: A list of bytes representing the inputs of this task.
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They will be concatenated and hashed to create the digest for this
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task.
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:type digest_data: list of bytes or None
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"""
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if (digest is None) == (digest_data is None):
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raise Exception("Must pass exactly one of `digest` and `digest_data`.")
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if digest is None:
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digest = hashlib.sha256("\n".join(digest_data).encode("utf-8")).hexdigest()
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if "cached-task-prefix" in config.graph_config["taskgraph"]:
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cache_prefix = config.graph_config["taskgraph"]["cached-task-prefix"]
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else:
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cache_prefix = config.graph_config["trust-domain"]
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subs = {
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"cache_prefix": cache_prefix,
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"type": cache_type,
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"name": cache_name,
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"digest": digest,
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}
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# We'll try to find a cached version of the toolchain at levels above and
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# including the current level, starting at the highest level.
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# Chain-of-trust doesn't handle tasks not built on the tip of a
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# pull-request, so don't look for level-1 tasks if building a pull-request.
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index_routes = []
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min_level = int(config.params["level"])
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if config.params["tasks_for"] == "github-pull-request":
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min_level = max(min_level, 3)
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for level in reversed(range(min_level, 4)):
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subs["level"] = level
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index_routes.append(TARGET_CACHE_INDEX.format(**subs))
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taskdesc["optimization"] = {"index-search": index_routes}
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# ... and cache at the lowest level.
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subs["level"] = config.params["level"]
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taskdesc.setdefault("routes", []).append(
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f"index.{TARGET_CACHE_INDEX.format(**subs)}"
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)
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# ... and add some extra routes for humans
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subs["build_date_long"] = time.strftime(
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"%Y.%m.%d.%Y%m%d%H%M%S", time.gmtime(config.params["build_date"])
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)
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taskdesc["routes"].extend(
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[f"index.{route.format(**subs)}" for route in EXTRA_CACHE_INDEXES]
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)
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taskdesc["attributes"]["cached_task"] = {
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"type": cache_type,
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"name": cache_name,
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"digest": digest,
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}
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