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git-filter-branch.txt: clarify ident variables usage 

There is a rare edge case of git-filter-branch: a filter that unsets
identity variables from the environment. Link to git-commit-tree
clarifies how Git would fall back in this situation.

Signed-off-by: Tadeusz Andrzej Kadłubowski <yess@hell.org.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Tadeusz Andrzej Kadłubowski 2013-02-21 21:22:50 +01:00 committed by Junio C Hamano
parent 8093ae8854
commit bee3eb079d
1 changed files with 5 additions and 2 deletions
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7
Documentation/git-filter-branch.txt
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@ -64,8 +64,11 @@ argument is always evaluated in the shell context using the 'eval' command
Prior to that, the $GIT_COMMIT environment variable will be set to contain
the id of the commit being rewritten. Also, GIT_AUTHOR_NAME,
GIT_AUTHOR_EMAIL, GIT_AUTHOR_DATE, GIT_COMMITTER_NAME, GIT_COMMITTER_EMAIL,
and GIT_COMMITTER_DATE are set according to the current commit. The values
of these variables after the filters have run, are used for the new commit.
and GIT_COMMITTER_DATE are taken from the current commit and exported to
the environment, in order to affect the author and committer identities of
the replacement commit created by linkgit:git-commit-tree[1] after the
filters have run.
If any evaluation of <command> returns a non-zero exit status, the whole
operation will be aborted.