The rev-list options can exclude some -- or all -- refs: git filter-branch <some-filter> master ^master Without this patch, these refs are assumed to be deleted, or worse, they are rewritten to some bogus merge bases. So really exclude excluded refs from being rewritten. This also allows you to safely call git filter-branch <some-filter> --all <rev-list options> to rewrite _all_ branches and tags. Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx> --- On Tue, 24 Jul 2007, Johannes Sixt wrote: > Johannes Schindelin wrote: > > > +# NEEDSWORK: we should sort the unmapped refs topologically first > > +while read ref > > +do > > + sha1=$(git rev-parse "$ref"^0) > > + test -f "$workdir"/../map/$sha1 && continue > > + # Assign the boundarie(s) in the set of rewritten commits > > + # as the replacement commit(s). > > + # (This would look a bit nicer if --not --stdin worked.) > > + for p in $((cd "$workdir"/../map; ls | sed "s/^/^/") | > > + git rev-list $ref --boundary --stdin | > > + sed -n "s/^-//p") > > + do > > + map $p >> "$workdir"/../map/$sha1 > > + done > > +done < "$tempdir"/heads > > This logic seems to be borked, and I don't grok it. I was trying this: > > git-filter-branch -- --since=2007.01.10 \ > refs/heads/topic refs/heads/master Actually, the error lay somewhere else. If excluded, topic should not have been a rewrite candidate. There might be something else looming here: what to do with git filter-branch --subdir-filter subdir/ topic master \ ^$(git merge-base topic master) when topic has no changes to the subdirectory, but master has? I guess the safest would be to 'test -f "$workdir"/../map/$p', and if at least one is not there, leave 'topic' as is. If at least one is there, however, we want to warn the user that this is not possible. (Something like: this was an unchanged ancestor: $p1, but that was a changed one: $p2. Make up your mind what you want.) git-filter-branch.sh | 9 ++++++++- t/t7003-filter-branch.sh | 9 +++++++++ 2 files changed, 17 insertions(+), 1 deletions(-) diff --git a/git-filter-branch.sh b/git-filter-branch.sh index 019a302..49b0f00 100755 --- a/git-filter-branch.sh +++ b/git-filter-branch.sh @@ -181,6 +181,7 @@ export GIT_DIR GIT_WORK_TREE=. # These refs should be updated if their heads were rewritten +negatives="$(git rev-parse --revs-only "$@" | grep "^\^")" git rev-parse --revs-only --symbolic "$@" | while read ref do @@ -196,7 +197,13 @@ do grep "refs/\(tags\|heads\)/$ref$")" esac - git check-ref-format "$ref" && echo "$ref" + # make sure we have a valid ref + git check-ref-format "$ref" || continue + + # if the ref has been excluded by the other options, skip it + test -z "$(git rev-list -1 "$ref" $negatives)" && continue + + echo "$ref" done > "$tempdir"/heads test -s "$tempdir"/heads || diff --git a/t/t7003-filter-branch.sh b/t/t7003-filter-branch.sh index c9a820d..667eda7 100755 --- a/t/t7003-filter-branch.sh +++ b/t/t7003-filter-branch.sh @@ -164,4 +164,13 @@ test_expect_success 'only dwim refs/heads/$ref or refs/tags/$ref' ' git filter-branch -f master ' +test_expect_success 'do not update uninteresting refs' ' + branch=$(git rev-parse branch) && + master=$(git rev-parse master) && + git filter-branch -f --env-filter "GIT_AUTHOR_EMAIL=xy@xxxxxxxx" \ + master ^removed-author branch && + test $branch = $(git rev-parse branch) && + test $master != $(git rev-parse master) +' + test_done -- 1.5.3.rc2.32.g35c5b-dirty - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
