mirror of
https://github.com/git/git.git
synced 2024-11-28 20:44:04 +08:00
7b1378bd95
These are modified by set_ident() but a subsequent patch would like to operate on their original values. Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
603 lines
14 KiB
Bash
Executable File
603 lines
14 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.
|
|
|
|
# The following functions will also be available in the commit filter:
|
|
|
|
functions=$(cat << \EOF
|
|
warn () {
|
|
echo "$*" >&2
|
|
}
|
|
|
|
map()
|
|
{
|
|
# if it was not rewritten, take the original
|
|
if test -r "$workdir/../map/$1"
|
|
then
|
|
cat "$workdir/../map/$1"
|
|
else
|
|
echo "$1"
|
|
fi
|
|
}
|
|
|
|
# if you run 'skip_commit "$@"' in a commit filter, it will print
|
|
# the (mapped) parents, effectively skipping the commit.
|
|
|
|
skip_commit()
|
|
{
|
|
shift;
|
|
while [ -n "$1" ];
|
|
do
|
|
shift;
|
|
map "$1";
|
|
shift;
|
|
done;
|
|
}
|
|
|
|
# if you run 'git_commit_non_empty_tree "$@"' in a commit filter,
|
|
# it will skip commits that leave the tree untouched, commit the other.
|
|
git_commit_non_empty_tree()
|
|
{
|
|
if test $# = 3 && test "$1" = $(git rev-parse "$3^{tree}"); then
|
|
map "$3"
|
|
elif test $# = 1 && test "$1" = 4b825dc642cb6eb9a060e54bf8d69288fbee4904; then
|
|
:
|
|
else
|
|
git commit-tree "$@"
|
|
fi
|
|
}
|
|
# override die(): this version puts in an extra line break, so that
|
|
# the progress is still visible
|
|
|
|
die()
|
|
{
|
|
echo >&2
|
|
echo "$*" >&2
|
|
exit 1
|
|
}
|
|
EOF
|
|
)
|
|
|
|
eval "$functions"
|
|
|
|
finish_ident() {
|
|
# Ensure non-empty id name.
|
|
echo "case \"\$GIT_$1_NAME\" in \"\") GIT_$1_NAME=\"\${GIT_$1_EMAIL%%@*}\" && export GIT_$1_NAME;; esac"
|
|
# And make sure everything is exported.
|
|
echo "export GIT_$1_NAME"
|
|
echo "export GIT_$1_EMAIL"
|
|
echo "export GIT_$1_DATE"
|
|
}
|
|
|
|
set_ident () {
|
|
parse_ident_from_commit author AUTHOR committer COMMITTER
|
|
finish_ident AUTHOR
|
|
finish_ident COMMITTER
|
|
}
|
|
|
|
USAGE="[--setup <command>] [--env-filter <command>]
|
|
[--tree-filter <command>] [--index-filter <command>]
|
|
[--parent-filter <command>] [--msg-filter <command>]
|
|
[--commit-filter <command>] [--tag-name-filter <command>]
|
|
[--subdirectory-filter <directory>] [--original <namespace>]
|
|
[-d <directory>] [-f | --force]
|
|
[--] [<rev-list options>...]"
|
|
|
|
OPTIONS_SPEC=
|
|
. git-sh-setup
|
|
|
|
if [ "$(is_bare_repository)" = false ]; then
|
|
require_clean_work_tree 'rewrite branches'
|
|
fi
|
|
|
|
tempdir=.git-rewrite
|
|
filter_setup=
|
|
filter_env=
|
|
filter_tree=
|
|
filter_index=
|
|
filter_parent=
|
|
filter_msg=cat
|
|
filter_commit=
|
|
filter_tag_name=
|
|
filter_subdir=
|
|
orig_namespace=refs/original/
|
|
force=
|
|
prune_empty=
|
|
remap_to_ancestor=
|
|
while :
|
|
do
|
|
case "$1" in
|
|
--)
|
|
shift
|
|
break
|
|
;;
|
|
--force|-f)
|
|
shift
|
|
force=t
|
|
continue
|
|
;;
|
|
--remap-to-ancestor)
|
|
# deprecated ($remap_to_ancestor is set now automatically)
|
|
shift
|
|
remap_to_ancestor=t
|
|
continue
|
|
;;
|
|
--prune-empty)
|
|
shift
|
|
prune_empty=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="$OPTARG"
|
|
;;
|
|
--setup)
|
|
filter_setup="$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="$OPTARG"
|
|
;;
|
|
--commit-filter)
|
|
filter_commit="$functions; $OPTARG"
|
|
;;
|
|
--tag-name-filter)
|
|
filter_tag_name="$OPTARG"
|
|
;;
|
|
--subdirectory-filter)
|
|
filter_subdir="$OPTARG"
|
|
remap_to_ancestor=t
|
|
;;
|
|
--original)
|
|
orig_namespace=$(expr "$OPTARG/" : '\(.*[^/]\)/*$')/
|
|
;;
|
|
*)
|
|
usage
|
|
;;
|
|
esac
|
|
done
|
|
|
|
case "$prune_empty,$filter_commit" in
|
|
,)
|
|
filter_commit='git commit-tree "$@"';;
|
|
t,)
|
|
filter_commit="$functions;"' git_commit_non_empty_tree "$@"';;
|
|
,*)
|
|
;;
|
|
*)
|
|
die "Cannot set --prune-empty and --commit-filter at the same time"
|
|
esac
|
|
|
|
case "$force" in
|
|
t)
|
|
rm -rf "$tempdir"
|
|
;;
|
|
'')
|
|
test -d "$tempdir" &&
|
|
die "$tempdir already exists, please remove it"
|
|
esac
|
|
orig_dir=$(pwd)
|
|
mkdir -p "$tempdir/t" &&
|
|
tempdir="$(cd "$tempdir"; pwd)" &&
|
|
cd "$tempdir/t" &&
|
|
workdir="$(pwd)" ||
|
|
die ""
|
|
|
|
# Remove tempdir on exit
|
|
trap 'cd "$orig_dir"; rm -rf "$tempdir"' 0
|
|
|
|
ORIG_GIT_DIR="$GIT_DIR"
|
|
ORIG_GIT_WORK_TREE="$GIT_WORK_TREE"
|
|
ORIG_GIT_INDEX_FILE="$GIT_INDEX_FILE"
|
|
ORIG_GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME"
|
|
ORIG_GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL"
|
|
ORIG_GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE"
|
|
ORIG_GIT_COMMITTER_NAME="$GIT_COMMITTER_NAME"
|
|
ORIG_GIT_COMMITTER_EMAIL="$GIT_COMMITTER_EMAIL"
|
|
ORIG_GIT_COMMITTER_DATE="$GIT_COMMITTER_DATE"
|
|
|
|
GIT_WORK_TREE=.
|
|
export GIT_DIR GIT_WORK_TREE
|
|
|
|
# Make sure refs/original is empty
|
|
git for-each-ref > "$tempdir"/backup-refs || exit
|
|
while read sha1 type name
|
|
do
|
|
case "$force,$name" in
|
|
,$orig_namespace*)
|
|
die "Cannot create a new backup.
|
|
A previous backup already exists in $orig_namespace
|
|
Force overwriting the backup with -f"
|
|
;;
|
|
t,$orig_namespace*)
|
|
git update-ref -d "$name" $sha1
|
|
;;
|
|
esac
|
|
done < "$tempdir"/backup-refs
|
|
|
|
# The refs should be updated if their heads were rewritten
|
|
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 "$tempdir"/heads ||
|
|
die "You must specify a ref to rewrite."
|
|
|
|
GIT_INDEX_FILE="$(pwd)/../index"
|
|
export GIT_INDEX_FILE
|
|
|
|
# map old->new commit ids for rewriting parents
|
|
mkdir ../map || die "Could not create map/ directory"
|
|
|
|
# we need "--" only if there are no path arguments in $@
|
|
nonrevs=$(git rev-parse --no-revs "$@") || exit
|
|
if test -z "$nonrevs"
|
|
then
|
|
dashdash=--
|
|
else
|
|
dashdash=
|
|
remap_to_ancestor=t
|
|
fi
|
|
|
|
git rev-parse --revs-only "$@" >../parse
|
|
|
|
case "$filter_subdir" in
|
|
"")
|
|
eval set -- "$(git rev-parse --sq --no-revs "$@")"
|
|
;;
|
|
*)
|
|
eval set -- "$(git rev-parse --sq --no-revs "$@" $dashdash \
|
|
"$filter_subdir")"
|
|
;;
|
|
esac
|
|
|
|
git rev-list --reverse --topo-order --default HEAD \
|
|
--parents --simplify-merges --stdin "$@" <../parse >../revs ||
|
|
die "Could not get the commits"
|
|
commits=$(wc -l <../revs | tr -d " ")
|
|
|
|
test $commits -eq 0 && die "Found nothing to rewrite"
|
|
|
|
# Rewrite the commits
|
|
report_progress ()
|
|
{
|
|
if test -n "$progress" &&
|
|
test $git_filter_branch__commit_count -gt $next_sample_at
|
|
then
|
|
count=$git_filter_branch__commit_count
|
|
|
|
now=$(date +%s)
|
|
elapsed=$(($now - $start_timestamp))
|
|
remaining=$(( ($commits - $count) * $elapsed / $count ))
|
|
if test $elapsed -gt 0
|
|
then
|
|
next_sample_at=$(( ($elapsed + 1) * $count / $elapsed ))
|
|
else
|
|
next_sample_at=$(($next_sample_at + 1))
|
|
fi
|
|
progress=" ($elapsed seconds passed, remaining $remaining predicted)"
|
|
fi
|
|
printf "\rRewrite $commit ($count/$commits)$progress "
|
|
}
|
|
|
|
git_filter_branch__commit_count=0
|
|
|
|
progress= start_timestamp=
|
|
if date '+%s' 2>/dev/null | grep -q '^[0-9][0-9]*$'
|
|
then
|
|
next_sample_at=0
|
|
progress="dummy to ensure this is not empty"
|
|
start_timestamp=$(date '+%s')
|
|
fi
|
|
|
|
if test -n "$filter_index" ||
|
|
test -n "$filter_tree" ||
|
|
test -n "$filter_subdir"
|
|
then
|
|
need_index=t
|
|
else
|
|
need_index=
|
|
fi
|
|
|
|
eval "$filter_setup" < /dev/null ||
|
|
die "filter setup failed: $filter_setup"
|
|
|
|
while read commit parents; do
|
|
git_filter_branch__commit_count=$(($git_filter_branch__commit_count+1))
|
|
|
|
report_progress
|
|
|
|
case "$filter_subdir" in
|
|
"")
|
|
if test -n "$need_index"
|
|
then
|
|
GIT_ALLOW_NULL_SHA1=1 git read-tree -i -m $commit
|
|
fi
|
|
;;
|
|
*)
|
|
# The commit may not have the subdirectory at all
|
|
err=$(GIT_ALLOW_NULL_SHA1=1 \
|
|
git read-tree -i -m $commit:"$filter_subdir" 2>&1) || {
|
|
if ! git rev-parse -q --verify $commit:"$filter_subdir"
|
|
then
|
|
rm -f "$GIT_INDEX_FILE"
|
|
else
|
|
echo >&2 "$err"
|
|
false
|
|
fi
|
|
}
|
|
esac || die "Could not initialize the index"
|
|
|
|
GIT_COMMIT=$commit
|
|
export GIT_COMMIT
|
|
git cat-file commit "$commit" >../commit ||
|
|
die "Cannot read commit $commit"
|
|
|
|
eval "$(set_ident <../commit)" ||
|
|
die "setting author/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 $commit removed are now still in the working tree;
|
|
# remove them, else they would be added again
|
|
git clean -d -q -f -x
|
|
eval "$filter_tree" < /dev/null ||
|
|
die "tree filter failed: $filter_tree"
|
|
|
|
(
|
|
git diff-index -r --name-only --ignore-submodules $commit -- &&
|
|
git ls-files --others
|
|
) > "$tempdir"/tree-state || exit
|
|
git update-index --add --replace --remove --stdin \
|
|
< "$tempdir"/tree-state || exit
|
|
fi
|
|
|
|
eval "$filter_index" < /dev/null ||
|
|
die "index filter failed: $filter_index"
|
|
|
|
parentstr=
|
|
for parent in $parents; do
|
|
for reparent in $(map "$parent"); do
|
|
case "$parentstr " in
|
|
*" -p $reparent "*)
|
|
;;
|
|
*)
|
|
parentstr="$parentstr -p $reparent"
|
|
;;
|
|
esac
|
|
done
|
|
done
|
|
if [ "$filter_parent" ]; then
|
|
parentstr="$(echo "$parentstr" | eval "$filter_parent")" ||
|
|
die "parent filter failed: $filter_parent"
|
|
fi
|
|
|
|
{
|
|
while IFS='' read -r header_line && test -n "$header_line"
|
|
do
|
|
# skip header lines...
|
|
:;
|
|
done
|
|
# and output the actual commit message
|
|
cat
|
|
} <../commit |
|
|
eval "$filter_msg" > ../message ||
|
|
die "msg filter failed: $filter_msg"
|
|
|
|
if test -n "$need_index"
|
|
then
|
|
tree=$(git write-tree)
|
|
else
|
|
tree=$(git rev-parse "$commit^{tree}")
|
|
fi
|
|
workdir=$workdir @SHELL_PATH@ -c "$filter_commit" "git commit-tree" \
|
|
"$tree" $parentstr < ../message > ../map/$commit ||
|
|
die "could not write rewritten commit"
|
|
done <../revs
|
|
|
|
# If we are filtering for paths, as in the 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.
|
|
# Ancestor remapping fixes this by mapping these heads to the unique
|
|
# nearest ancestor that survived the pruning.
|
|
|
|
if test "$remap_to_ancestor" = t
|
|
then
|
|
while read ref
|
|
do
|
|
sha1=$(git rev-parse "$ref"^0)
|
|
test -f "$workdir"/../map/$sha1 && continue
|
|
ancestor=$(git rev-list --simplify-merges -1 "$ref" "$@")
|
|
test "$ancestor" && echo $(map $ancestor) >> "$workdir"/../map/$sha1
|
|
done < "$tempdir"/heads
|
|
fi
|
|
|
|
# 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"
|
|
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"
|
|
if ! git update-ref -m "filter-branch: rewrite" \
|
|
"$ref" $rewritten $sha1 2>/dev/null; then
|
|
if test $(git cat-file -t "$ref") = tag; then
|
|
if test -z "$filter_tag_name"; then
|
|
warn "WARNING: You said to rewrite tagged commits, but not the corresponding tag."
|
|
warn "WARNING: Perhaps use '--tag-name-filter cat' to rewrite the tag."
|
|
fi
|
|
else
|
|
die "Could not rewrite $ref"
|
|
fi
|
|
fi
|
|
;;
|
|
*)
|
|
# NEEDSWORK: possibly add -Werror, making this an error
|
|
warn "WARNING: '$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" $sha1 ||
|
|
exit
|
|
done < "$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="$(git rev-parse -q "$sha1"^{commit})" || continue
|
|
fi
|
|
|
|
[ -f "../map/$sha1" ] || continue
|
|
new_sha1="$(cat "../map/$sha1")"
|
|
GIT_COMMIT="$sha1"
|
|
export GIT_COMMIT
|
|
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
|
|
new_sha1=$( ( printf 'object %s\ntype commit\ntag %s\n' \
|
|
"$new_sha1" "$new_ref"
|
|
git cat-file tag "$ref" |
|
|
sed -n \
|
|
-e '1,/^$/{
|
|
/^object /d
|
|
/^type /d
|
|
/^tag /d
|
|
}' \
|
|
-e '/^-----BEGIN PGP SIGNATURE-----/q' \
|
|
-e 'p' ) |
|
|
git mktag) ||
|
|
die "Could not create new tag object for $ref"
|
|
if git cat-file tag "$ref" | \
|
|
sane_grep '^-----BEGIN PGP SIGNATURE-----' >/dev/null 2>&1
|
|
then
|
|
warn "gpg signature stripped from tag object $sha1t"
|
|
fi
|
|
fi
|
|
|
|
git update-ref "refs/tags/$new_ref" "$new_sha1" ||
|
|
die "Could not write tag $new_ref"
|
|
done
|
|
fi
|
|
|
|
unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
|
|
unset GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
|
|
unset GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL GIT_COMMITTER_DATE
|
|
test -z "$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="$ORIG_GIT_INDEX_FILE" &&
|
|
export GIT_INDEX_FILE
|
|
}
|
|
test -z "$ORIG_GIT_AUTHOR_NAME" || {
|
|
GIT_AUTHOR_NAME="$ORIG_GIT_AUTHOR_NAME" &&
|
|
export GIT_AUTHOR_NAME
|
|
}
|
|
test -z "$ORIG_GIT_AUTHOR_EMAIL" || {
|
|
GIT_AUTHOR_EMAIL="$ORIG_GIT_AUTHOR_EMAIL" &&
|
|
export GIT_AUTHOR_EMAIL
|
|
}
|
|
test -z "$ORIG_GIT_AUTHOR_DATE" || {
|
|
GIT_AUTHOR_DATE="$ORIG_GIT_AUTHOR_DATE" &&
|
|
export GIT_AUTHOR_DATE
|
|
}
|
|
test -z "$ORIG_GIT_COMMITTER_NAME" || {
|
|
GIT_COMMITTER_NAME="$ORIG_GIT_COMMITTER_NAME" &&
|
|
export GIT_COMMITTER_NAME
|
|
}
|
|
test -z "$ORIG_GIT_COMMITTER_EMAIL" || {
|
|
GIT_COMMITTER_EMAIL="$ORIG_GIT_COMMITTER_EMAIL" &&
|
|
export GIT_COMMITTER_EMAIL
|
|
}
|
|
test -z "$ORIG_GIT_COMMITTER_DATE" || {
|
|
GIT_COMMITTER_DATE="$ORIG_GIT_COMMITTER_DATE" &&
|
|
export GIT_COMMITTER_DATE
|
|
}
|
|
|
|
cd "$orig_dir"
|
|
rm -rf "$tempdir"
|
|
|
|
trap - 0
|
|
|
|
if [ "$(is_bare_repository)" = false ]; then
|
|
git read-tree -u -m HEAD || exit
|
|
fi
|
|
|
|
exit 0
|