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filter-branch: Add more error-handling

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9273b56 (filter-branch: Fix fatal error on bare repositories, 2009-02-03)
fixed a missing check of return status from an underlying command in
git-filter-branch, but there still are places that do not check errors.
For example, the command does not pay attention to the exit status of the
command given by --commit-filter.  It should abort in such a case.

This attempts to fix all the remaining places that fails to checks errors.

In two places, I've had to break apart pipelines in order to check the
error code for the first stage of the pipeline, as discussed here:

  http://kerneltrap.org/mailarchive/git/2009/1/28/4835614

Feedback on this patch was provided by Johannes Sixt, Johannes Schindelin
and Junio C Hamano.  Thomas Rast helped with pipeline error handling.

Signed-off-by: Eric Kidd <git@randomhacks.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Kidd 2009-02-11 16:10:41 -05:00 committed by Junio C Hamano
parent e5f5050ed1
commit 0ea29cce4d
2 changed files with 18 additions and 12 deletions
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26
git-filter-branch.sh
View File

@ -221,7 +221,7 @@ die ""
trap 'cd ../..; rm -rf "$tempdir"' 0
# Make sure refs/original is empty
git for-each-ref > "$tempdir"/backup-refs
git for-each-ref > "$tempdir"/backup-refs || exit
while read sha1 type name
do
case "$force,$name" in
@ -241,8 +241,9 @@ GIT_WORK_TREE=.
export GIT_DIR GIT_WORK_TREE
# The refs should be updated if their heads were rewritten
git rev-parse --no-flags --revs-only --symbolic-full-name --default HEAD "$@" |
sed -e '/^^/d' >"$tempdir"/heads
git rev-parse --no-flags --revs-only --symbolic-full-name \
--default HEAD "$@" > "$tempdir"/raw-heads || exit
sed -e '/^^/d' "$tempdir"/raw-heads >"$tempdir"/heads
test -s "$tempdir"/heads ||
die "Which ref do you want to rewrite?"
@ -251,8 +252,6 @@ GIT_INDEX_FILE="$(pwd)/../index"
export GIT_INDEX_FILE
git read-tree || die "Could not seed the index"
ret=0
# map old->new commit ids for rewriting parents
mkdir ../map || die "Could not create map/ directory"
@ -315,10 +314,11 @@ while read commit parents; do
die "tree filter failed: $filter_tree"
(
git diff-index -r --name-only $commit
git diff-index -r --name-only $commit &&
git ls-files --others
) |
git update-index --add --replace --remove --stdin
) > "$tempdir"/tree-state || exit
git update-index --add --replace --remove --stdin \
< "$tempdir"/tree-state || exit
fi
eval "$filter_index" < /dev/null ||
@ -339,7 +339,8 @@ while read commit parents; do
eval "$filter_msg" > ../message ||
die "msg filter failed: $filter_msg"
@SHELL_PATH@ -c "$filter_commit" "git commit-tree" \
$(git write-tree) $parentstr < ../message > ../map/$commit
$(git write-tree) $parentstr < ../message > ../map/$commit ||
die "could not write rewritten commit"
done <../revs
# In case of a subdirectory filter, it is possible that a specified head
@ -407,7 +408,8 @@ do
die "Could not rewrite $ref"
;;
esac
git update-ref -m "filter-branch: backup" "$orig_namespace$ref" $sha1
git update-ref -m "filter-branch: backup" "$orig_namespace$ref" $sha1 ||
exit
done < "$tempdir"/heads
# TODO: This should possibly go, with the semantics that all positive given
@ -483,7 +485,7 @@ test -z "$ORIG_GIT_INDEX_FILE" || {
}
if [ "$(is_bare_repository)" = false ]; then
git read-tree -u -m HEAD
git read-tree -u -m HEAD || exit
fi
exit $ret
exit 0

4
t/t7003-filter-branch.sh
View File

@ -48,6 +48,10 @@ test_expect_success 'result is really identical' '
test $H = $(git rev-parse HEAD)
'
test_expect_success 'Fail if commit filter fails' '
test_must_fail git filter-branch -f --commit-filter "exit 1" HEAD
'
test_expect_success 'rewrite, renaming a specific file' '
git filter-branch -f --tree-filter "mv d doh || :" HEAD
'