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https://github.com/git/git.git
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5d4138a66d
* maint: Start preparing for 1.5.3.6 git-send-email: Change the prompt for the subject of the initial message. SubmittingPatches: improve the 'Patch:' section of the checklist instaweb: Minor cleanups and fixes for potential problems stop t1400 hiding errors in tests Makefile: add missing dependency on wt-status.h refresh_index_quietly(): express "optional" nature of index writing better Fix sed string regex escaping in module_name. Avoid a few unportable, needlessly nested "...`...". git-mailsplit: with maildirs not only process cur/, but also new/ Signed-off-by: Junio C Hamano <gitster@pobox.com>
518 lines
12 KiB
Bash
Executable File
518 lines
12 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2006 Johannes E. Schindelin
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# SHORT DESCRIPTION
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#
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# This script makes it easy to fix up commits in the middle of a series,
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# and rearrange commits.
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#
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# The original idea comes from Eric W. Biederman, in
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# http://article.gmane.org/gmane.comp.version-control.git/22407
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USAGE='(--continue | --abort | --skip | [--preserve-merges] [--verbose]
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[--onto <branch>] <upstream> [<branch>])'
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. git-sh-setup
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require_work_tree
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DOTEST="$GIT_DIR/.dotest-merge"
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TODO="$DOTEST"/git-rebase-todo
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DONE="$DOTEST"/done
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MSG="$DOTEST"/message
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SQUASH_MSG="$DOTEST"/message-squash
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REWRITTEN="$DOTEST"/rewritten
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PRESERVE_MERGES=
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STRATEGY=
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VERBOSE=
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test -d "$REWRITTEN" && PRESERVE_MERGES=t
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test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)"
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test -f "$DOTEST"/verbose && VERBOSE=t
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warn () {
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echo "$*" >&2
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}
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output () {
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case "$VERBOSE" in
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'')
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output=$("$@" 2>&1 )
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status=$?
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test $status != 0 && printf "%s\n" "$output"
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return $status
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;;
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*)
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"$@"
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;;
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esac
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}
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require_clean_work_tree () {
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# test if working tree is dirty
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git rev-parse --verify HEAD > /dev/null &&
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git update-index --refresh &&
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git diff-files --quiet &&
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git diff-index --cached --quiet HEAD ||
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die "Working tree is dirty"
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}
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ORIG_REFLOG_ACTION="$GIT_REFLOG_ACTION"
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comment_for_reflog () {
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case "$ORIG_REFLOG_ACTION" in
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''|rebase*)
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GIT_REFLOG_ACTION="rebase -i ($1)"
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export GIT_REFLOG_ACTION
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;;
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esac
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}
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mark_action_done () {
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sed -e 1q < "$TODO" >> "$DONE"
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sed -e 1d < "$TODO" >> "$TODO".new
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mv -f "$TODO".new "$TODO"
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count=$(($(grep -ve '^$' -e '^#' < "$DONE" | wc -l)))
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total=$(($count+$(grep -ve '^$' -e '^#' < "$TODO" | wc -l)))
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printf "Rebasing (%d/%d)\r" $count $total
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test -z "$VERBOSE" || echo
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}
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make_patch () {
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parent_sha1=$(git rev-parse --verify "$1"^) ||
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die "Cannot get patch for $1^"
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git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
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test -f "$DOTEST"/message ||
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git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message
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test -f "$DOTEST"/author-script ||
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get_author_ident_from_commit "$1" > "$DOTEST"/author-script
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}
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die_with_patch () {
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make_patch "$1"
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die "$2"
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}
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die_abort () {
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rm -rf "$DOTEST"
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die "$1"
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}
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has_action () {
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grep -vqe '^$' -e '^#' "$1"
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}
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pick_one () {
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no_ff=
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case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac
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output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
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test -d "$REWRITTEN" &&
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pick_one_preserving_merges "$@" && return
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parent_sha1=$(git rev-parse --verify $sha1^) ||
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die "Could not get the parent of $sha1"
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current_sha1=$(git rev-parse --verify HEAD)
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if test "$no_ff$current_sha1" = "$parent_sha1"; then
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output git reset --hard $sha1
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test "a$1" = a-n && output git reset --soft $current_sha1
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sha1=$(git rev-parse --short $sha1)
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output warn Fast forward to $sha1
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else
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output git cherry-pick "$@"
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fi
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}
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pick_one_preserving_merges () {
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case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
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sha1=$(git rev-parse $sha1)
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if test -f "$DOTEST"/current-commit
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then
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current_commit=$(cat "$DOTEST"/current-commit) &&
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git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
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rm "$DOTEST"/current-commit ||
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die "Cannot write current commit's replacement sha1"
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fi
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# rewrite parents; if none were rewritten, we can fast-forward.
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fast_forward=t
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preserve=t
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new_parents=
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for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
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do
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if test -f "$REWRITTEN"/$p
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then
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preserve=f
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new_p=$(cat "$REWRITTEN"/$p)
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test $p != $new_p && fast_forward=f
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case "$new_parents" in
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*$new_p*)
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;; # do nothing; that parent is already there
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*)
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new_parents="$new_parents $new_p"
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;;
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esac
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fi
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done
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case $fast_forward in
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t)
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output warn "Fast forward to $sha1"
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test $preserve = f || echo $sha1 > "$REWRITTEN"/$sha1
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;;
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f)
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test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
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first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
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# detach HEAD to current parent
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output git checkout $first_parent 2> /dev/null ||
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die "Cannot move HEAD to $first_parent"
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echo $sha1 > "$DOTEST"/current-commit
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case "$new_parents" in
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' '*' '*)
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# redo merge
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author_script=$(get_author_ident_from_commit $sha1)
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eval "$author_script"
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msg="$(git cat-file commit $sha1 | sed -e '1,/^$/d')"
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# No point in merging the first parent, that's HEAD
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new_parents=${new_parents# $first_parent}
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# NEEDSWORK: give rerere a chance
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if ! GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
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GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
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GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
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output git merge $STRATEGY -m "$msg" \
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$new_parents
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then
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printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
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die Error redoing merge $sha1
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fi
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;;
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*)
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output git cherry-pick "$@" ||
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die_with_patch $sha1 "Could not pick $sha1"
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;;
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esac
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;;
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esac
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}
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nth_string () {
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case "$1" in
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*1[0-9]|*[04-9]) echo "$1"th;;
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*1) echo "$1"st;;
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*2) echo "$1"nd;;
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*3) echo "$1"rd;;
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esac
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}
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make_squash_message () {
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if test -f "$SQUASH_MSG"; then
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COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
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< "$SQUASH_MSG" | tail -n 1)+1))
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echo "# This is a combination of $COUNT commits."
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sed -n "2,\$p" < "$SQUASH_MSG"
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else
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COUNT=2
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echo "# This is a combination of two commits."
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echo "# The first commit's message is:"
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echo
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git cat-file commit HEAD | sed -e '1,/^$/d'
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echo
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fi
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echo "# This is the $(nth_string $COUNT) commit message:"
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echo
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git cat-file commit $1 | sed -e '1,/^$/d'
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}
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peek_next_command () {
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sed -n "1s/ .*$//p" < "$TODO"
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}
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do_next () {
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rm -f "$DOTEST"/message "$DOTEST"/author-script \
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"$DOTEST"/amend || exit
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read command sha1 rest < "$TODO"
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case "$command" in
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'#'*|'')
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mark_action_done
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;;
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pick|p)
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comment_for_reflog pick
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mark_action_done
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pick_one $sha1 ||
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die_with_patch $sha1 "Could not apply $sha1... $rest"
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;;
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edit|e)
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comment_for_reflog edit
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mark_action_done
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pick_one $sha1 ||
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die_with_patch $sha1 "Could not apply $sha1... $rest"
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make_patch $sha1
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: > "$DOTEST"/amend
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warn
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warn "You can amend the commit now, with"
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warn
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warn " git commit --amend"
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warn
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exit 0
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;;
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squash|s)
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comment_for_reflog squash
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has_action "$DONE" ||
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die "Cannot 'squash' without a previous commit"
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mark_action_done
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make_squash_message $sha1 > "$MSG"
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case "$(peek_next_command)" in
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squash|s)
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EDIT_COMMIT=
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USE_OUTPUT=output
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cp "$MSG" "$SQUASH_MSG"
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;;
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*)
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EDIT_COMMIT=-e
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USE_OUTPUT=
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rm -f "$SQUASH_MSG" || exit
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;;
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esac
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failed=f
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author_script=$(get_author_ident_from_commit HEAD)
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output git reset --soft HEAD^
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pick_one -n $sha1 || failed=t
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echo "$author_script" > "$DOTEST"/author-script
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case $failed in
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f)
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# This is like --amend, but with a different message
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eval "$author_script"
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GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
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GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
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GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
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$USE_OUTPUT git commit -F "$MSG" $EDIT_COMMIT
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;;
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t)
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cp "$MSG" "$GIT_DIR"/MERGE_MSG
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warn
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warn "Could not apply $sha1... $rest"
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die_with_patch $sha1 ""
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;;
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esac
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;;
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*)
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warn "Unknown command: $command $sha1 $rest"
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die_with_patch $sha1 "Please fix this in the file $TODO."
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;;
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esac
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test -s "$TODO" && return
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comment_for_reflog finish &&
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HEADNAME=$(cat "$DOTEST"/head-name) &&
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OLDHEAD=$(cat "$DOTEST"/head) &&
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SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
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if test -d "$REWRITTEN"
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then
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test -f "$DOTEST"/current-commit &&
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current_commit=$(cat "$DOTEST"/current-commit) &&
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git rev-parse HEAD > "$REWRITTEN"/$current_commit
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NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
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else
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NEWHEAD=$(git rev-parse HEAD)
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fi &&
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case $HEADNAME in
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refs/*)
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message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
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git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD &&
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git symbolic-ref HEAD $HEADNAME
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;;
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esac && {
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test ! -f "$DOTEST"/verbose ||
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git diff-tree --stat $(cat "$DOTEST"/head)..HEAD
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} &&
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rm -rf "$DOTEST" &&
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git gc --auto &&
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warn "Successfully rebased and updated $HEADNAME."
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exit
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}
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do_rest () {
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while :
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do
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do_next
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done
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}
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while test $# != 0
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do
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case "$1" in
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--continue)
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comment_for_reflog continue
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test -d "$DOTEST" || die "No interactive rebase running"
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# commit if necessary
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git rev-parse --verify HEAD > /dev/null &&
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git update-index --refresh &&
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git diff-files --quiet &&
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! git diff-index --cached --quiet HEAD &&
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. "$DOTEST"/author-script && {
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test ! -f "$DOTEST"/amend || git reset --soft HEAD^
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} &&
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export GIT_AUTHOR_NAME GIT_AUTHOR_NAME GIT_AUTHOR_DATE &&
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git commit -F "$DOTEST"/message -e
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require_clean_work_tree
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do_rest
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;;
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--abort)
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comment_for_reflog abort
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test -d "$DOTEST" || die "No interactive rebase running"
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HEADNAME=$(cat "$DOTEST"/head-name)
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HEAD=$(cat "$DOTEST"/head)
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case $HEADNAME in
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refs/*)
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git symbolic-ref HEAD $HEADNAME
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;;
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esac &&
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output git reset --hard $HEAD &&
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rm -rf "$DOTEST"
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exit
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;;
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--skip)
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comment_for_reflog skip
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test -d "$DOTEST" || die "No interactive rebase running"
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output git reset --hard && do_rest
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;;
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-s|--strategy)
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case "$#,$1" in
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*,*=*)
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STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
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1,*)
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usage ;;
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*)
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STRATEGY="-s $2"
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shift ;;
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esac
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;;
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--merge)
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# we use merge anyway
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;;
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-C*)
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die "Interactive rebase uses merge, so $1 does not make sense"
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;;
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-v|--verbose)
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VERBOSE=t
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;;
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-p|--preserve-merges)
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PRESERVE_MERGES=t
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;;
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-i|--interactive)
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# yeah, we know
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;;
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''|-h)
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usage
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;;
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*)
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test -d "$DOTEST" &&
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die "Interactive rebase already started"
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git var GIT_COMMITTER_IDENT >/dev/null ||
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die "You need to set your committer info first"
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comment_for_reflog start
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ONTO=
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case "$1" in
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--onto)
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ONTO=$(git rev-parse --verify "$2") ||
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die "Does not point to a valid commit: $2"
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shift; shift
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;;
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esac
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require_clean_work_tree
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if test ! -z "$2"
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then
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output git show-ref --verify --quiet "refs/heads/$2" ||
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die "Invalid branchname: $2"
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output git checkout "$2" ||
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die "Could not checkout $2"
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fi
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HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?"
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UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
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mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
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test -z "$ONTO" && ONTO=$UPSTREAM
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: > "$DOTEST"/interactive || die "Could not mark as interactive"
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git symbolic-ref HEAD > "$DOTEST"/head-name 2> /dev/null ||
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echo "detached HEAD" > "$DOTEST"/head-name
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echo $HEAD > "$DOTEST"/head
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echo $UPSTREAM > "$DOTEST"/upstream
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echo $ONTO > "$DOTEST"/onto
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test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
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test t = "$VERBOSE" && : > "$DOTEST"/verbose
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if test t = "$PRESERVE_MERGES"
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then
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# $REWRITTEN contains files for each commit that is
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# reachable by at least one merge base of $HEAD and
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# $UPSTREAM. They are not necessarily rewritten, but
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# their children might be.
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# This ensures that commits on merged, but otherwise
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# unrelated side branches are left alone. (Think "X"
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# in the man page's example.)
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mkdir "$REWRITTEN" &&
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for c in $(git merge-base --all $HEAD $UPSTREAM)
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do
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echo $ONTO > "$REWRITTEN"/$c ||
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die "Could not init rewritten commits"
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done
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MERGES_OPTION=
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else
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MERGES_OPTION=--no-merges
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fi
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SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
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SHORTHEAD=$(git rev-parse --short $HEAD)
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SHORTONTO=$(git rev-parse --short $ONTO)
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cat > "$TODO" << EOF
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# Rebasing $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO
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#
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# Commands:
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# pick = use commit
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# edit = use commit, but stop for amending
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# squash = use commit, but meld into previous commit
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#
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# If you remove a line here THAT COMMIT WILL BE LOST.
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#
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EOF
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git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
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--abbrev=7 --reverse --left-right --cherry-pick \
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$UPSTREAM...$HEAD | \
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sed -n "s/^>/pick /p" >> "$TODO"
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has_action "$TODO" ||
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die_abort "Nothing to do"
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cp "$TODO" "$TODO".backup
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git_editor "$TODO" ||
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die "Could not execute editor"
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has_action "$TODO" ||
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die_abort "Nothing to do"
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output git checkout $ONTO && do_rest
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;;
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esac
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shift
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done
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