b2bc9a3098
Quite a few of the scripts are rather careless about using GIT_DIR while changing directories. Some try their hands (with different likelihood of success) in making GIT_DIR absolute. This patch lets git-sh-setup.sh cater for absolute directories (in a way that should work reliably also with non-Unix path names) and removes the respective kludges in git-filter-branch.sh and git-instaweb.sh. Signed-off-by: David Kastrup <dak@gnu.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
391 lines
8.7 KiB
Bash
Executable File
391 lines
8.7 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# Rewrite revision history
|
|
# Copyright (c) Petr Baudis, 2006
|
|
# Minimal changes to "port" it to core-git (c) Johannes Schindelin, 2007
|
|
#
|
|
# Lets you rewrite the revision history of the current branch, creating
|
|
# a new branch. You can specify a number of filters to modify the commits,
|
|
# files and trees.
|
|
|
|
USAGE="git-filter-branch [-d TEMPDIR] [FILTERS] DESTBRANCH [REV-RANGE]"
|
|
. git-sh-setup
|
|
|
|
warn () {
|
|
echo "$*" >&2
|
|
}
|
|
|
|
map()
|
|
{
|
|
# if it was not rewritten, take the original
|
|
if test -r "$workdir/../map/$1"
|
|
then
|
|
cat "$workdir/../map/$1"
|
|
else
|
|
echo "$1"
|
|
fi
|
|
}
|
|
|
|
# override die(): this version puts in an extra line break, so that
|
|
# the progress is still visible
|
|
|
|
die()
|
|
{
|
|
echo >&2
|
|
echo "$*" >&2
|
|
exit 1
|
|
}
|
|
|
|
# When piped a commit, output a script to set the ident of either
|
|
# "author" or "committer
|
|
|
|
set_ident () {
|
|
lid="$(echo "$1" | tr "A-Z" "a-z")"
|
|
uid="$(echo "$1" | tr "a-z" "A-Z")"
|
|
pick_id_script='
|
|
/^'$lid' /{
|
|
s/'\''/'\''\\'\'\''/g
|
|
h
|
|
s/^'$lid' \([^<]*\) <[^>]*> .*$/\1/
|
|
s/'\''/'\''\'\'\''/g
|
|
s/.*/export GIT_'$uid'_NAME='\''&'\''/p
|
|
|
|
g
|
|
s/^'$lid' [^<]* <\([^>]*\)> .*$/\1/
|
|
s/'\''/'\''\'\'\''/g
|
|
s/.*/export GIT_'$uid'_EMAIL='\''&'\''/p
|
|
|
|
g
|
|
s/^'$lid' [^<]* <[^>]*> \(.*\)$/\1/
|
|
s/'\''/'\''\'\'\''/g
|
|
s/.*/export GIT_'$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%%@*}\""
|
|
}
|
|
|
|
tempdir=.git-rewrite
|
|
filter_env=
|
|
filter_tree=
|
|
filter_index=
|
|
filter_parent=
|
|
filter_msg=cat
|
|
filter_commit='git commit-tree "$@"'
|
|
filter_tag_name=
|
|
filter_subdir=
|
|
orig_namespace=refs/original/
|
|
force=
|
|
while case "$#" in 0) usage;; esac
|
|
do
|
|
case "$1" in
|
|
--)
|
|
shift
|
|
break
|
|
;;
|
|
--force|-f)
|
|
shift
|
|
force=t
|
|
continue
|
|
;;
|
|
-*)
|
|
;;
|
|
*)
|
|
break;
|
|
esac
|
|
|
|
# all switches take one argument
|
|
ARG="$1"
|
|
case "$#" in 1) usage ;; esac
|
|
shift
|
|
OPTARG="$1"
|
|
shift
|
|
|
|
case "$ARG" in
|
|
-d)
|
|
tempdir="$OPTARG"
|
|
;;
|
|
--env-filter)
|
|
filter_env="$OPTARG"
|
|
;;
|
|
--tree-filter)
|
|
filter_tree="$OPTARG"
|
|
;;
|
|
--index-filter)
|
|
filter_index="$OPTARG"
|
|
;;
|
|
--parent-filter)
|
|
filter_parent="$OPTARG"
|
|
;;
|
|
--msg-filter)
|
|
filter_msg="$OPTARG"
|
|
;;
|
|
--commit-filter)
|
|
filter_commit="$OPTARG"
|
|
;;
|
|
--tag-name-filter)
|
|
filter_tag_name="$OPTARG"
|
|
;;
|
|
--subdirectory-filter)
|
|
filter_subdir="$OPTARG"
|
|
;;
|
|
--original)
|
|
orig_namespace="$OPTARG"
|
|
;;
|
|
*)
|
|
usage
|
|
;;
|
|
esac
|
|
done
|
|
|
|
case "$force" in
|
|
t)
|
|
rm -rf "$tempdir"
|
|
;;
|
|
'')
|
|
test -d "$tempdir" &&
|
|
die "$tempdir already exists, please remove it"
|
|
esac
|
|
mkdir -p "$tempdir/t" &&
|
|
tempdir="$(cd "$tempdir"; pwd)" &&
|
|
cd "$tempdir/t" &&
|
|
workdir="$(pwd)" ||
|
|
die ""
|
|
|
|
# Make sure refs/original is empty
|
|
git for-each-ref > "$tempdir"/backup-refs
|
|
while read sha1 type name
|
|
do
|
|
case "$force,$name" in
|
|
,$orig_namespace*)
|
|
die "Namespace $orig_namespace not empty"
|
|
;;
|
|
t,$orig_namespace*)
|
|
git update-ref -d "$name" $sha1
|
|
;;
|
|
esac
|
|
done < "$tempdir"/backup-refs
|
|
|
|
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 > "$tempdir"/heads
|
|
|
|
test -s "$tempdir"/heads ||
|
|
die "Which ref do you want to rewrite?"
|
|
|
|
export GIT_INDEX_FILE="$(pwd)/../index"
|
|
git read-tree || die "Could not seed the index"
|
|
|
|
ret=0
|
|
|
|
# map old->new commit ids for rewriting parents
|
|
mkdir ../map || die "Could not create map/ directory"
|
|
|
|
case "$filter_subdir" in
|
|
"")
|
|
git rev-list --reverse --topo-order --default HEAD \
|
|
--parents "$@"
|
|
;;
|
|
*)
|
|
git rev-list --reverse --topo-order --default HEAD \
|
|
--parents --full-history "$@" -- "$filter_subdir"
|
|
esac > ../revs || die "Could not get the commits"
|
|
commits=$(wc -l <../revs | tr -d " ")
|
|
|
|
test $commits -eq 0 && die "Found nothing to rewrite"
|
|
|
|
# Rewrite the commits
|
|
|
|
i=0
|
|
while read commit parents; do
|
|
i=$(($i+1))
|
|
printf "\rRewrite $commit ($i/$commits)"
|
|
|
|
case "$filter_subdir" in
|
|
"")
|
|
git read-tree -i -m $commit
|
|
;;
|
|
*)
|
|
git read-tree -i -m $commit:"$filter_subdir"
|
|
esac || die "Could not initialize the index"
|
|
|
|
export GIT_COMMIT=$commit
|
|
git cat-file commit "$commit" >../commit ||
|
|
die "Cannot read commit $commit"
|
|
|
|
eval "$(set_ident AUTHOR <../commit)" ||
|
|
die "setting author failed for commit $commit"
|
|
eval "$(set_ident COMMITTER <../commit)" ||
|
|
die "setting committer failed for commit $commit"
|
|
eval "$filter_env" < /dev/null ||
|
|
die "env filter failed: $filter_env"
|
|
|
|
if [ "$filter_tree" ]; then
|
|
git checkout-index -f -u -a ||
|
|
die "Could not checkout the index"
|
|
# files that $commit removed are now still in the working tree;
|
|
# remove them, else they would be added again
|
|
git ls-files -z --others | xargs -0 rm -f
|
|
eval "$filter_tree" < /dev/null ||
|
|
die "tree filter failed: $filter_tree"
|
|
|
|
git diff-index -r $commit | cut -f 2- | tr '\n' '\0' | \
|
|
xargs -0 git update-index --add --replace --remove
|
|
git ls-files -z --others | \
|
|
xargs -0 git update-index --add --replace --remove
|
|
fi
|
|
|
|
eval "$filter_index" < /dev/null ||
|
|
die "index filter failed: $filter_index"
|
|
|
|
parentstr=
|
|
for parent in $parents; do
|
|
for reparent in $(map "$parent"); do
|
|
parentstr="$parentstr -p $reparent"
|
|
done
|
|
done
|
|
if [ "$filter_parent" ]; then
|
|
parentstr="$(echo "$parentstr" | eval "$filter_parent")" ||
|
|
die "parent filter failed: $filter_parent"
|
|
fi
|
|
|
|
sed -e '1,/^$/d' <../commit | \
|
|
eval "$filter_msg" > ../message ||
|
|
die "msg filter failed: $filter_msg"
|
|
sh -c "$filter_commit" "git commit-tree" \
|
|
$(git write-tree) $parentstr < ../message > ../map/$commit
|
|
done <../revs
|
|
|
|
# In case of a subdirectory filter, it is possible that a specified head
|
|
# is not in the set of rewritten commits, because it was pruned by the
|
|
# revision walker. Fix it by mapping these heads to the next rewritten
|
|
# ancestor(s), i.e. the boundaries in the set of rewritten commits.
|
|
|
|
# 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
|
|
|
|
# Finally update the refs
|
|
|
|
_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
|
|
# avoid rewriting a ref twice
|
|
test -f "$orig_namespace$ref" && continue
|
|
|
|
sha1=$(git rev-parse "$ref"^0)
|
|
rewritten=$(map $sha1)
|
|
|
|
test $sha1 = "$rewritten" &&
|
|
warn "WARNING: Ref '$ref' is unchanged" &&
|
|
continue
|
|
|
|
case "$rewritten" in
|
|
'')
|
|
echo "Ref '$ref' was deleted"
|
|
git update-ref -m "filter-branch: delete" -d "$ref" $sha1 ||
|
|
die "Could not delete $ref"
|
|
;;
|
|
$_x40)
|
|
echo "Ref '$ref' was rewritten"
|
|
git update-ref -m "filter-branch: rewrite" \
|
|
"$ref" $rewritten $sha1 ||
|
|
die "Could not rewrite $ref"
|
|
;;
|
|
*)
|
|
# NEEDSWORK: possibly add -Werror, making this an error
|
|
warn "WARNING: '$ref' was rewritten into multiple commits:"
|
|
warn "$rewritten"
|
|
warn "WARNING: Ref '$ref' points to the first one now."
|
|
rewritten=$(echo "$rewritten" | head -n 1)
|
|
git update-ref -m "filter-branch: rewrite to first" \
|
|
"$ref" $rewritten $sha1 ||
|
|
die "Could not rewrite $ref"
|
|
;;
|
|
esac
|
|
git update-ref -m "filter-branch: backup" "$orig_namespace$ref" $sha1
|
|
count=$(($count+1))
|
|
done < "$tempdir"/heads
|
|
|
|
# TODO: This should possibly go, with the semantics that all positive given
|
|
# refs are updated, and their original heads stored in refs/original/
|
|
# Filter tags
|
|
|
|
if [ "$filter_tag_name" ]; then
|
|
git for-each-ref --format='%(objectname) %(objecttype) %(refname)' refs/tags |
|
|
while read sha1 type ref; do
|
|
ref="${ref#refs/tags/}"
|
|
# XXX: Rewrite tagged trees as well?
|
|
if [ "$type" != "commit" -a "$type" != "tag" ]; then
|
|
continue;
|
|
fi
|
|
|
|
if [ "$type" = "tag" ]; then
|
|
# Dereference to a commit
|
|
sha1t="$sha1"
|
|
sha1="$(git rev-parse "$sha1"^{commit} 2>/dev/null)" || continue
|
|
fi
|
|
|
|
[ -f "../map/$sha1" ] || continue
|
|
new_sha1="$(cat "../map/$sha1")"
|
|
export GIT_COMMIT="$sha1"
|
|
new_ref="$(echo "$ref" | eval "$filter_tag_name")" ||
|
|
die "tag name filter failed: $filter_tag_name"
|
|
|
|
echo "$ref -> $new_ref ($sha1 -> $new_sha1)"
|
|
|
|
if [ "$type" = "tag" ]; then
|
|
# Warn that we are not rewriting the tag object itself.
|
|
warn "unreferencing tag object $sha1t"
|
|
fi
|
|
|
|
git update-ref "refs/tags/$new_ref" "$new_sha1" ||
|
|
die "Could not write tag $new_ref"
|
|
done
|
|
fi
|
|
|
|
cd ../..
|
|
rm -rf "$tempdir"
|
|
echo
|
|
test $count -gt 0 && echo "These refs were rewritten:"
|
|
git show-ref | grep ^"$orig_namespace"
|
|
|
|
exit $ret
|