mirror of
https://github.com/carbon-language/carbon-lang.git
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Jon Ross-PerkinsandChandler Carruth
4d38c7b1e4
Trying to better address ephemeral issues such as: https://github.com/carbon-language/carbon-lang/actions/runs/9226025647/job/25384877352 `bazelisk test` currently has some retries, and this migrates those to a script and copies it to other places that we invoke bazelisk. --------- Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
79 lines
2.4 KiB
Python
Executable File
79 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Runs bazel on arguments.
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This is provided for other scripts to run bazel without requiring it be
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manually installed.
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"""
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__copyright__ = """
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Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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Exceptions. See /LICENSE for license information.
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SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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"""
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import argparse
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import subprocess
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import time
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import scripts_utils
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def main() -> None:
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parser = argparse.ArgumentParser(description="Runs bazel.")
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parser.add_argument(
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"--attempts",
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metavar="COUNT",
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type=int,
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default=1,
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help="The number of attempts to execute the command, automatically "
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"retrying errors that may be transient.",
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)
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parser.add_argument(
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"--jobs-on-last-attempt",
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metavar="COUNT",
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type=int,
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help="Sets the number of jobs in user.bazelrc on the last attempt. If "
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"there is only one attempt, this will be set immediately.",
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)
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script_args, bazel_args = parser.parse_known_args()
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bazel = scripts_utils.locate_bazel()
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attempt = 0
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while True:
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attempt += 1
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if attempt == script_args.attempts and script_args.jobs_on_last_attempt:
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with open("user.bazelrc", "a") as bazelrc:
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bazelrc.write(
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f"build --jobs={script_args.jobs_on_last_attempt}\n"
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)
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p = subprocess.run([bazel] + bazel_args)
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# If this was the last attempt, we're done.
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if attempt == script_args.attempts:
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exit(p.returncode)
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# Several error codes are reliably permanent, break immediately.
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# `0` -- Success.
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# `1` -- The build failed.
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# `2` -- Command line or environment problem.
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# `3` -- Tests failed or timed out, we don't retry at this layer
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# on execution timeout.
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# `4` -- Test command but no tests found.
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# `8` -- Explicitly interrupted build.
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#
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# Note that `36` is documented as "likely permanent", but we retry
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# it as most of our transient failures actually produce that error
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# code.
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if p.returncode in (0, 1, 2, 3, 4, 8):
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exit(p.returncode)
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print("Retrying a failure because it may be transient...")
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# Also sleep a bit to try to skip over transient machine load.
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time.sleep(attempt)
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if __name__ == "__main__":
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main()
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