mirror of
https://gerrit.googlesource.com/git-repo
synced 2024-12-21 07:16:21 +00:00
8da4861b38
Follow the same approach as 39ffd9977e to reduce serialization overhead.
Below benchmarks are tested with 2.7k projects on my workstation
(warm cache). git tracing is disabled for benchmark.
(seconds) | v2.48 | v2.48 | this CL | this CL
| | -j32 | | -j32
-----------------------------------------------------------
with clean tree state:
branches (none) | 5.6 | 5.9 | 1.0 | 0.9
status (clean) | 21.3 | 9.4 | 19.4 | 4.7
diff (none) | 7.6 | 7.2 | 5.7 | 2.2
prune (none) | 5.7 | 6.1 | 1.3 | 1.2
abandon (none) | 19.4 | 18.6 | 0.9 | 0.8
upload (none) | 19.7 | 18.7 | 0.9 | 0.8
forall -c true | 7.5 | 7.6 | 0.6 | 0.6
forall -c "git log -1" | 11.3 | 11.1 | 0.6 | 0.6
with branches:
start BRANCH --all | 21.9 | 20.3 | 13.6 | 2.6
checkout BRANCH | 29.1 | 27.8 | 1.1 | 1.0
branches (2) | 28.0 | 28.6 | 1.5 | 1.3
abandon BRANCH | 29.2 | 27.5 | 9.7 | 2.2
Bug: b/371638995
Change-Id: I53989a3d1e43063587b3f52f852b1c2c56b49412
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/440221
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Tested-by: Kuang-che Wu <kcwu@google.com>
Commit-Queue: Kuang-che Wu <kcwu@google.com>
115 lines
3.5 KiB
Python
115 lines
3.5 KiB
Python
# Copyright (C) 2009 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import functools
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from typing import NamedTuple
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from command import Command
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from command import DEFAULT_LOCAL_JOBS
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from error import GitError
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from error import RepoExitError
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from progress import Progress
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from repo_logging import RepoLogger
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logger = RepoLogger(__file__)
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class CheckoutBranchResult(NamedTuple):
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# Whether the Project is on the branch (i.e. branch exists and no errors)
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result: bool
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project_idx: int
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error: Exception
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class CheckoutCommandError(RepoExitError):
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"""Exception thrown when checkout command fails."""
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class MissingBranchError(RepoExitError):
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"""Exception thrown when no project has specified branch."""
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class Checkout(Command):
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COMMON = True
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helpSummary = "Checkout a branch for development"
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helpUsage = """
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%prog <branchname> [<project>...]
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"""
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helpDescription = """
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The '%prog' command checks out an existing branch that was previously
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created by 'repo start'.
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The command is equivalent to:
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repo forall [<project>...] -c git checkout <branchname>
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"""
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PARALLEL_JOBS = DEFAULT_LOCAL_JOBS
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def ValidateOptions(self, opt, args):
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if not args:
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self.Usage()
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@classmethod
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def _ExecuteOne(cls, nb, project_idx):
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"""Checkout one project."""
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error = None
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result = None
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project = cls.get_parallel_context()["projects"][project_idx]
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try:
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result = project.CheckoutBranch(nb)
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except GitError as e:
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error = e
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return CheckoutBranchResult(result, project_idx, error)
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def Execute(self, opt, args):
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nb = args[0]
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err = []
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err_projects = []
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success = []
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all_projects = self.GetProjects(
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args[1:], all_manifests=not opt.this_manifest_only
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)
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def _ProcessResults(_pool, pm, results):
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for result in results:
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project = all_projects[result.project_idx]
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if result.error is not None:
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err.append(result.error)
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err_projects.append(project)
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elif result.result:
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success.append(project)
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pm.update(msg="")
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with self.ParallelContext():
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self.get_parallel_context()["projects"] = all_projects
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self.ExecuteInParallel(
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opt.jobs,
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functools.partial(self._ExecuteOne, nb),
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range(len(all_projects)),
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callback=_ProcessResults,
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output=Progress(
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f"Checkout {nb}", len(all_projects), quiet=opt.quiet
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),
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)
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if err_projects:
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for p in err_projects:
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logger.error("error: %s/: cannot checkout %s", p.relpath, nb)
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raise CheckoutCommandError(aggregate_errors=err)
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elif not success:
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msg = f"error: no project has branch {nb}"
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logger.error(msg)
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raise MissingBranchError(msg)
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