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# Copyright (C) 2009 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import functools
from typing import NamedTuple
from command import Command
from command import DEFAULT_LOCAL_JOBS
from error import GitError
from error import RepoExitError
from progress import Progress
from repo_logging import RepoLogger
logger = RepoLogger(__file__)
class CheckoutBranchResult(NamedTuple):
# Whether the Project is on the branch (i.e. branch exists and no errors)
result: bool
project_idx: int
error: Exception
class CheckoutCommandError(RepoExitError):
"""Exception thrown when checkout command fails."""
class MissingBranchError(RepoExitError):
"""Exception thrown when no project has specified branch."""
class Checkout(Command):
COMMON = True
helpSummary = "Checkout a branch for development"
helpUsage = """
%prog <branchname> [<project>...]
"""
helpDescription = """
The '%prog' command checks out an existing branch that was previously
created by 'repo start'.
The command is equivalent to:
repo forall [<project>...] -c git checkout <branchname>
"""
PARALLEL_JOBS = DEFAULT_LOCAL_JOBS
def ValidateOptions(self, opt, args):
if not args:
self.Usage()
@classmethod
def _ExecuteOne(cls, nb, project_idx):
"""Checkout one project."""
error = None
result = None
project = cls.get_parallel_context()["projects"][project_idx]
try:
result = project.CheckoutBranch(nb)
except GitError as e:
error = e
return CheckoutBranchResult(result, project_idx, error)
def Execute(self, opt, args):
nb = args[0]
err = []
err_projects = []
success = []
all_projects = self.GetProjects(
args[1:], all_manifests=not opt.this_manifest_only
)
def _ProcessResults(_pool, pm, results):
for result in results:
project = all_projects[result.project_idx]
if result.error is not None:
err.append(result.error)
err_projects.append(project)
elif result.result:
success.append(project)
pm.update(msg="")
with self.ParallelContext():
self.get_parallel_context()["projects"] = all_projects
self.ExecuteInParallel(
opt.jobs,
functools.partial(self._ExecuteOne, nb),
range(len(all_projects)),
callback=_ProcessResults,
output=Progress(
f"Checkout {nb}", len(all_projects), quiet=opt.quiet
),
)
if err_projects:
for p in err_projects:
logger.error("error: %s/: cannot checkout %s", p.relpath, nb)
raise CheckoutCommandError(aggregate_errors=err)
elif not success:
msg = f"error: no project has branch {nb}"
logger.error(msg)
raise MissingBranchError(msg)
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