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git-difftool--helper: honor
--trust-exit-code
with --dir-diff
The `--trust-exit-code` option for git-diff-tool(1) was introduced via 2b52123 (difftool: add support for --trust-exit-code, 2014-10-26). When set, it makes us return the exit code of the invoked diff tool when diffing multiple files. This patch didn't change the code path where `--dir-diff` was passed because we already returned the exit code of the diff tool unconditionally in that case. This was changed a month later via c41d3fe (difftool--helper: add explicit exit statement, 2014-11-20), where an explicit `exit 0` was added to the end of git-difftool--helper.sh. While the stated intent of that commit was merely a cleanup, it had the consequence that we now to ignore the exit code of the diff tool when `--dir-diff` was set. This change in behaviour is thus very likely an unintended side effect of this patch. Now there are two ways to fix this: - We can either restore the original behaviour, which unconditionally returned the exit code of the diffing tool when `--dir-diff` is passed. - Or we can make the `--dir-diff` case respect the `--trust-exit-code` flag. The fact that we have been ignoring exit codes for 7 years by now makes me rather lean towards the latter option. Furthermore, respecting the flag in one case but not the other would needlessly make the user interface more complex. Fix the bug so that we also honor `--trust-exit-code` for dir diffs and adjust the documentation accordingly. Reported-by: Jean-Rémy Falleri <jr.falleri@gmail.com> Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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