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run-command API: don't fall back on online_cpus()

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When a "jobs = 0" is passed let's BUG() out rather than fall back on
online_cpus(). The default behavior was added when this API was
implemented in c553c72eed (run-command: add an asynchronous parallel
child processor, 2015-12-15).

Most of our code in-tree that scales up to "online_cpus()" by default
calls that function by itself. Keeping this default behavior just for
the sake of two callers means that we'd need to maintain this one spot
where we're second-guessing the config passed down into pp_init().

The preceding commit has an overview of the API callers that passed
"jobs = 0". There were only two of them (actually three, but they
resolved to these two config parsing codepaths).

The "fetch.parallel" caller already had a test for the
"fetch.parallel=0" case added in 0353c68818 (fetch: do not run a
redundant fetch from submodule, 2022-05-16), but there was no such
test for "submodule.fetchJobs". Let's add one here.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason
2022-10-12 23:02:24 +02:00
committed by Junio C Hamano
parent 6a48b428b4
commit 51243f9f0f
4 changed files with 14 additions and 5 deletions
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2
builtin/fetch.c
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@ -122,6 +122,8 @@ static int git_fetch_config(const char *k, const char *v, void *cb)
fetch_parallel_config = git_config_int(k, v);
if (fetch_parallel_config < 0)
die(_("fetch.parallel cannot be negative"));
if (!fetch_parallel_config)
fetch_parallel_config = online_cpus();
return 0;
}