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command: unify --job option & default values

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Extend the Command class to support adding the --jobs option to the
parser if the command declares it supports running in parallel.  Also
pull the default value used for the number of local jobs into the
command module so local commands can share it.

Change-Id: I22b0f8d2cf69875013cec657b8e6c4385549ccac
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/297024
Tested-by: Mike Frysinger <vapier@google.com>
Reviewed-by: Chris Mcdonald <cjmcdonald@google.com>
This commit is contained in:
Mike Frysinger 2021-02-16 01:43:31 -05:00
parent c5bbea8db3
commit 6a2400a4d0
5 changed files with 27 additions and 25 deletions
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14
subcmds/branches.py
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@ -16,7 +16,7 @@ import itertools
import multiprocessing
import sys
from color import Coloring
from command import Command
from command import Command, DEFAULT_LOCAL_JOBS
# Number of projects to submit to a single worker process at a time.
# This number represents a tradeoff between the overhead of IPC and finer
@ -103,17 +103,7 @@ the branch appears in, or does not appear in. If no project list
is shown, then the branch appears in all projects.
"""
def _Options(self, p):
"""Add flags to CLI parser for this subcommand."""
default_jobs = min(multiprocessing.cpu_count(), 8)
p.add_option(
'-j',
'--jobs',
type=int,
default=default_jobs,
help='Number of worker processes to spawn '
'(default: %s)' % default_jobs)
PARALLEL_JOBS = DEFAULT_LOCAL_JOBS
def Execute(self, opt, args):
projects = self.GetProjects(args)