# a new branch. You can specify a number of filters to modify the commits,
# files and trees.
+# The following functions will also be available in the commit filter:
+
+functions=$(cat << \EOF
warn () {
echo "$*" >&2
}
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"
}
-# This script can be sourced by the commit filter to get the functions
-test "a$SOURCE_FUNCTIONS" = a1 && return
-this_script="$(cd "$(dirname "$0")"; pwd)"/$(basename "$0")
-export this_script
-
USAGE="[--env-filter <command>] [--tree-filter <command>] \
[--index-filter <command>] [--parent-filter <command>] \
[--msg-filter <command>] [--commit-filter <command>] \
[--original <namespace>] [-d <directory>] [-f | --force] \
[<rev-list options>...]"
+OPTIONS_SPEC=
. git-sh-setup
git diff-files --quiet &&
force=
while :
do
- test $# = 0 && usage
case "$1" in
--)
shift
filter_msg="$OPTARG"
;;
--commit-filter)
- filter_commit='SOURCE_FUNCTIONS=1 . "$this_script";'" $OPTARG"
+ filter_commit="$functions; $OPTARG"
;;
--tag-name-filter)
filter_tag_name="$OPTARG"
workdir="$(pwd)" ||
die ""
+# Remove tempdir on exit
+trap 'cd ../..; rm -rf "$tempdir"' 0
+
# Make sure refs/original is empty
git for-each-ref > "$tempdir"/backup-refs
while read sha1 type name
ORIG_GIT_DIR="$GIT_DIR"
ORIG_GIT_WORK_TREE="$GIT_WORK_TREE"
ORIG_GIT_INDEX_FILE="$GIT_INDEX_FILE"
-export GIT_DIR GIT_WORK_TREE=.
+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
;;
*)
- git read-tree -i -m $commit:"$filter_subdir"
+ # The commit may not have the subdirectory at all
+ err=$(git read-tree -i -m $commit:"$filter_subdir" 2>&1) || {
+ if ! git rev-parse --verify $commit:"$filter_subdir" 2>/dev/null
+ then
+ rm -f "$GIT_INDEX_FILE"
+ else
+ echo >&2 "$err"
+ false
+ fi
+ }
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' | \
- xargs -0 git update-index --add --replace --remove
- git ls-files -z --others | \
- xargs -0 git update-index --add --replace --remove
+ (
+ git diff-index -r --name-only $commit
+ git ls-files --others
+ ) |
+ git update-index --add --replace --remove --stdin
fi
eval "$filter_index" < /dev/null ||
_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