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filter-branch documentation: non-zero exit status in command abort the filter 

Since commit 8c1ce0f46b filter-branch fails
when a <command> has a non-zero exit status. This commit makes it clear
in the documentation and also fixes the parent-filter example, that was
incorrectly returning non-zero when the commit being tested wasn't the
one to be rewritten.

Signed-off-by: Caio Marcelo de Oliveira Filho <cmarcelo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Caio Marcelo de Oliveira Filho 2008-02-25 23:14:31 -03:00 committed by Junio C Hamano
parent e103343644
commit 41e86a3774
1 changed files with 4 additions and 2 deletions
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6
Documentation/git-filter-branch.txt
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@ -56,7 +56,9 @@ notable exception of the commit filter, for technical reasons).
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.
and GIT_COMMITTER_DATE are set according to the current commit. If any
evaluation of <command> returns a non-zero exit status, the whole operation
will be aborted.
A 'map' function is available that takes an "original sha1 id" argument
and outputs a "rewritten sha1 id" if the commit has been already
@ -197,7 +199,7 @@ happened). If this is not the case, use:
--------------------------------------------------------------------------
git filter-branch --parent-filter \
'cat; test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>"' HEAD
'test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>" || cat' HEAD
--------------------------------------------------------------------------
or even simpler: