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version --build-options: report commit, too, if possible

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In particular when local tags are used (or tags that are pushed to some
fork) to build Git, it is very hard to figure out from which particular
revision a particular Git executable was built. It gets worse when those
tags are deleted, or even updated.

Let's just report an exact, unabbreviated commit name in our build
options.

We need to be careful, though, to report when the current commit cannot
be determined, e.g. when building from a tarball without any associated
Git repository. This could be the case also when extracting Git's source
code into an unrelated Git worktree.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2017-12-15 00:34:38 +01:00
committed by Junio C Hamano
parent b22894049f
commit ed32b788c0
4 changed files with 10 additions and 1 deletions
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5
help.c
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@ -413,6 +413,11 @@ int cmd_version(int argc, const char **argv, const char *prefix)
if (build_options) {
printf("cpu: %s\n", GIT_HOST_CPU);
if (git_built_from_commit_string[0])
printf("built from commit: %s\n",
git_built_from_commit_string);
else
printf("no commit associated with this build\n");
printf("sizeof-long: %d\n", (int)sizeof(long));
/* NEEDSWORK: also save and output GIT-BUILD_OPTIONS? */
}