# a new branch. You can specify a number of filters to modify the commits,
# files and trees.
-USAGE="git-filter-branch [-d TEMPDIR] [FILTERS] [REV-RANGE]"
-. git-sh-setup
+# The following functions will also be available in the commit filter:
+functions=$(cat << \EOF
warn () {
echo "$*" >&2
}
fi
}
+# if you run 'skip_commit "$@"' in a commit filter, it will print
+# the (mapped) parents, effectively skipping the commit.
+
+skip_commit()
+{
+ shift;
+ while [ -n "$1" ];
+ do
+ shift;
+ map "$1";
+ shift;
+ done;
+}
+
# override die(): this version puts in an extra line break, so that
# the progress is still visible
echo "$*" >&2
exit 1
}
+EOF
+)
+
+eval "$functions"
# When piped a commit, output a script to set the ident of either
# "author" or "committer
h
s/^'$lid' \([^<]*\) <[^>]*> .*$/\1/
s/'\''/'\''\'\'\''/g
- s/.*/export GIT_'$uid'_NAME='\''&'\''/p
+ s/.*/GIT_'$uid'_NAME='\''&'\''; export GIT_'$uid'_NAME/p
g
s/^'$lid' [^<]* <\([^>]*\)> .*$/\1/
s/'\''/'\''\'\'\''/g
- s/.*/export GIT_'$uid'_EMAIL='\''&'\''/p
+ s/.*/GIT_'$uid'_EMAIL='\''&'\''; export GIT_'$uid'_EMAIL/p
g
s/^'$lid' [^<]* <[^>]*> \(.*\)$/\1/
s/'\''/'\''\'\'\''/g
- s/.*/export GIT_'$uid'_DATE='\''&'\''/p
+ s/.*/GIT_'$uid'_DATE='\''&'\''; export GIT_'$uid'_DATE/p
q
}
LANG=C LC_ALL=C sed -ne "$pick_id_script"
# Ensure non-empty id name.
- echo "[ -n \"\$GIT_${uid}_NAME\" ] || export GIT_${uid}_NAME=\"\${GIT_${uid}_EMAIL%%@*}\""
+ echo "case \"\$GIT_${uid}_NAME\" in \"\") GIT_${uid}_NAME=\"\${GIT_${uid}_EMAIL%%@*}\" && export GIT_${uid}_NAME;; esac"
}
+USAGE="[--env-filter <command>] [--tree-filter <command>] \
+[--index-filter <command>] [--parent-filter <command>] \
+[--msg-filter <command>] [--commit-filter <command>] \
+[--tag-name-filter <command>] [--subdirectory-filter <directory>] \
+[--original <namespace>] [-d <directory>] [-f | --force] \
+[<rev-list options>...]"
+
+OPTIONS_SPEC=
+. git-sh-setup
+
+git diff-files --quiet &&
+ git diff-index --cached --quiet HEAD -- ||
+ die "Cannot rewrite branch(es) with a dirty working directory."
+
tempdir=.git-rewrite
filter_env=
filter_tree=
filter_subdir=
orig_namespace=refs/original/
force=
-while case "$#" in 0) usage;; esac
+while :
do
case "$1" in
--)
filter_msg="$OPTARG"
;;
--commit-filter)
- filter_commit="$OPTARG"
+ filter_commit="$functions; $OPTARG"
;;
--tag-name-filter)
filter_tag_name="$OPTARG"
filter_subdir="$OPTARG"
;;
--original)
- orig_namespace="$OPTARG"
+ orig_namespace=$(expr "$OPTARG/" : '\(.*[^/]\)/*$')/
;;
*)
usage
workdir="$(pwd)" ||
die ""
+# Remove tempdir on exit
+trap 'cd ../..; rm -rf "$tempdir"' 0
+
# Make sure refs/original is empty
git for-each-ref > "$tempdir"/backup-refs
while read sha1 type name
esac
done < "$tempdir"/backup-refs
-export GIT_DIR GIT_WORK_TREE=.
+ORIG_GIT_DIR="$GIT_DIR"
+ORIG_GIT_WORK_TREE="$GIT_WORK_TREE"
+ORIG_GIT_INDEX_FILE="$GIT_INDEX_FILE"
+GIT_WORK_TREE=.
+export GIT_DIR GIT_WORK_TREE
-# These refs should be updated if their heads were rewritten
-
-git rev-parse --revs-only --symbolic "$@" |
-while read ref
-do
- # normalize ref
- case "$ref" in
- HEAD)
- ref="$(git symbolic-ref "$ref")"
- ;;
- refs/*)
- ;;
- *)
- ref="$(git for-each-ref --format='%(refname)' |
- grep /"$ref")"
- esac
-
- git check-ref-format "$ref" && echo "$ref"
-done > "$tempdir"/heads
+# The refs should be updated if their heads were rewritten
+git rev-parse --no-flags --revs-only --symbolic-full-name --default HEAD "$@" |
+sed -e '/^^/d' >"$tempdir"/heads
test -s "$tempdir"/heads ||
die "Which ref do you want to rewrite?"
-export GIT_INDEX_FILE="$(pwd)/../index"
+GIT_INDEX_FILE="$(pwd)/../index"
+export GIT_INDEX_FILE
git read-tree || die "Could not seed the index"
ret=0
git read-tree -i -m $commit:"$filter_subdir"
esac || die "Could not initialize the index"
- export GIT_COMMIT=$commit
+ GIT_COMMIT=$commit
+ export GIT_COMMIT
git cat-file commit "$commit" >../commit ||
die "Cannot read commit $commit"
eval "$filter_tree" < /dev/null ||
die "tree filter failed: $filter_tree"
- git diff-index -r $commit | cut -f 2- | tr '\n' '\0' | \
+ git diff-index -r $commit | cut -f 2- | tr '\012' '\000' | \
xargs -0 git update-index --add --replace --remove
git ls-files -z --others | \
xargs -0 git update-index --add --replace --remove
_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
-count=0
echo
while read ref
do
;;
esac
git update-ref -m "filter-branch: backup" "$orig_namespace$ref" $sha1
- count=$(($count+1))
done < "$tempdir"/heads
# TODO: This should possibly go, with the semantics that all positive given
[ -f "../map/$sha1" ] || continue
new_sha1="$(cat "../map/$sha1")"
- export GIT_COMMIT="$sha1"
+ GIT_COMMIT="$sha1"
+ export GIT_COMMIT
new_ref="$(echo "$ref" | eval "$filter_tag_name")" ||
die "tag name filter failed: $filter_tag_name"
cd ../..
rm -rf "$tempdir"
-echo
-test $count -gt 0 && echo "These refs were rewritten:"
-git show-ref | grep ^"$orig_namespace"
+
+trap - 0
+
+unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
+test -z "$ORIG_GIT_DIR" || GIT_DIR="$ORIG_GIT_DIR" && export GIT_DIR
+test -z "$ORIG_GIT_WORK_TREE" || GIT_WORK_TREE="$ORIG_GIT_WORK_TREE" &&
+ export GIT_WORK_TREE
+test -z "$ORIG_GIT_INDEX_FILE" || GIT_INDEX_FILE="$ORIG_GIT_INDEX_FILE" &&
+ export GIT_INDEX_FILE
+git read-tree -u -m HEAD
exit $ret