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Isolate test suite git commands from ambient global/system git config #2

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Merged
mbarbin merged 1 commit into from
Aug 18, 2026
Merged

Isolate test suite git commands from ambient global/system git config #2

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17 changes: 17 additions & 0 deletions src/test-helpers/central_test_helpers.ml
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,23 @@
(* SPDX-License-Identifier: MIT *)
(*********************************************************************************)

(* Every git invocation the test suite makes - both the ones issued directly
from this process and the ones the spawned [central] subprocess makes on
its own (see [Central_test_harness.run]; it inherits this process's
environment) - is pointed away from the ambient global/system git config.
Without this, [init_repo] below only isolates identity (user.name/email);
anything else set globally on the machine running the tests still applies
to these throwaway repos, e.g. commit/tag signing (which can block on a
hardware key or a gpg-agent prompt) or a global [core.hooksPath] running
pre-commit/pre-push hooks. Either can turn an otherwise-fast test suite
into one that hangs or crawls, for reasons that have nothing to do with
[central] itself and everything to do with the developer's own [~/.gitconfig].
[/dev/null] is git's documented way to say "load no file here". *)
let () =
Unix.putenv "GIT_CONFIG_GLOBAL" "/dev/null";
Unix.putenv "GIT_CONFIG_SYSTEM" "/dev/null"
;;

module Fake_subrepo = struct
type t =
{ subrepo : Central.Subrepo.t
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