diff options
Diffstat (limited to 'git-rebase--interactive.sh')
| -rwxr-xr-x | git-rebase--interactive.sh | 557 |
1 files changed, 557 insertions, 0 deletions
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh new file mode 100755 index 0000000000..8ee08ff2fd --- /dev/null +++ b/git-rebase--interactive.sh @@ -0,0 +1,557 @@ +#!/bin/sh +# +# Copyright (c) 2006 Johannes E. Schindelin + +# SHORT DESCRIPTION +# +# This script makes it easy to fix up commits in the middle of a series, +# and rearrange commits. +# +# The original idea comes from Eric W. Biederman, in +# http://article.gmane.org/gmane.comp.version-control.git/22407 + +USAGE='(--continue | --abort | --skip | [--preserve-merges] [--verbose] + [--onto <branch>] <upstream> [<branch>])' + +OPTIONS_SPEC= +. git-sh-setup +require_work_tree + +DOTEST="$GIT_DIR/.dotest-merge" +TODO="$DOTEST"/git-rebase-todo +DONE="$DOTEST"/done +MSG="$DOTEST"/message +SQUASH_MSG="$DOTEST"/message-squash +REWRITTEN="$DOTEST"/rewritten +PRESERVE_MERGES= +STRATEGY= +VERBOSE= +test -d "$REWRITTEN" && PRESERVE_MERGES=t +test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)" +test -f "$DOTEST"/verbose && VERBOSE=t + +GIT_CHERRY_PICK_HELP=" After resolving the conflicts, +mark the corrected paths with 'git add <paths>', and +run 'git rebase --continue'" +export GIT_CHERRY_PICK_HELP + +warn () { + echo "$*" >&2 +} + +output () { + case "$VERBOSE" in + '') + output=$("$@" 2>&1 ) + status=$? + test $status != 0 && printf "%s\n" "$output" + return $status + ;; + *) + "$@" + ;; + esac +} + +require_clean_work_tree () { + # test if working tree is dirty + git rev-parse --verify HEAD > /dev/null && + git update-index --ignore-submodules --refresh && + git diff-files --quiet --ignore-submodules && + git diff-index --cached --quiet HEAD --ignore-submodules -- || + die "Working tree is dirty" +} + +ORIG_REFLOG_ACTION="$GIT_REFLOG_ACTION" + +comment_for_reflog () { + case "$ORIG_REFLOG_ACTION" in + ''|rebase*) + GIT_REFLOG_ACTION="rebase -i ($1)" + export GIT_REFLOG_ACTION + ;; + esac +} + +last_count= +mark_action_done () { + sed -e 1q < "$TODO" >> "$DONE" + sed -e 1d < "$TODO" >> "$TODO".new + mv -f "$TODO".new "$TODO" + count=$(grep -c '^[^#]' < "$DONE") + total=$(($count+$(grep -c '^[^#]' < "$TODO"))) + if test "$last_count" != "$count" + then + last_count=$count + printf "Rebasing (%d/%d)\r" $count $total + test -z "$VERBOSE" || echo + fi +} + +make_patch () { + parent_sha1=$(git rev-parse --verify "$1"^) || + die "Cannot get patch for $1^" + git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch + test -f "$DOTEST"/message || + git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message + test -f "$DOTEST"/author-script || + get_author_ident_from_commit "$1" > "$DOTEST"/author-script +} + +die_with_patch () { + make_patch "$1" + git rerere + die "$2" +} + +die_abort () { + rm -rf "$DOTEST" + die "$1" +} + +has_action () { + grep '^[^#]' "$1" >/dev/null +} + +pick_one () { + no_ff= + case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac + output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1" + test -d "$REWRITTEN" && + pick_one_preserving_merges "$@" && return + parent_sha1=$(git rev-parse --verify $sha1^) || + die "Could not get the parent of $sha1" + current_sha1=$(git rev-parse --verify HEAD) + if test "$no_ff$current_sha1" = "$parent_sha1"; then + output git reset --hard $sha1 + test "a$1" = a-n && output git reset --soft $current_sha1 + sha1=$(git rev-parse --short $sha1) + output warn Fast forward to $sha1 + else + output git cherry-pick "$@" + fi +} + +pick_one_preserving_merges () { + case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac + sha1=$(git rev-parse $sha1) + + if test -f "$DOTEST"/current-commit + then + current_commit=$(cat "$DOTEST"/current-commit) && + git rev-parse HEAD > "$REWRITTEN"/$current_commit && + rm "$DOTEST"/current-commit || + die "Cannot write current commit's replacement sha1" + fi + + # rewrite parents; if none were rewritten, we can fast-forward. + fast_forward=t + preserve=t + new_parents= + for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-) + do + if test -f "$REWRITTEN"/$p + then + preserve=f + new_p=$(cat "$REWRITTEN"/$p) + test $p != $new_p && fast_forward=f + case "$new_parents" in + *$new_p*) + ;; # do nothing; that parent is already there + *) + new_parents="$new_parents $new_p" + ;; + esac + fi + done + case $fast_forward in + t) + output warn "Fast forward to $sha1" + test $preserve = f || echo $sha1 > "$REWRITTEN"/$sha1 + ;; + f) + test "a$1" = a-n && die "Refusing to squash a merge: $sha1" + + first_parent=$(expr "$new_parents" : ' \([^ ]*\)') + # detach HEAD to current parent + output git checkout $first_parent 2> /dev/null || + die "Cannot move HEAD to $first_parent" + + echo $sha1 > "$DOTEST"/current-commit + case "$new_parents" in + ' '*' '*) + # redo merge + author_script=$(get_author_ident_from_commit $sha1) + eval "$author_script" + msg="$(git cat-file commit $sha1 | sed -e '1,/^$/d')" + # No point in merging the first parent, that's HEAD + new_parents=${new_parents# $first_parent} + if ! GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \ + GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \ + GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \ + output git merge $STRATEGY -m "$msg" \ + $new_parents + then + git rerere + printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG + die Error redoing merge $sha1 + fi + ;; + *) + output git cherry-pick "$@" || + die_with_patch $sha1 "Could not pick $sha1" + ;; + esac + ;; + esac +} + +nth_string () { + case "$1" in + *1[0-9]|*[04-9]) echo "$1"th;; + *1) echo "$1"st;; + *2) echo "$1"nd;; + *3) echo "$1"rd;; + esac +} + +make_squash_message () { + if test -f "$SQUASH_MSG"; then + COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \ + < "$SQUASH_MSG" | sed -ne '$p')+1)) + echo "# This is a combination of $COUNT commits." + sed -e 1d -e '2,/^./{ + /^$/d + }' <"$SQUASH_MSG" + else + COUNT=2 + echo "# This is a combination of two commits." + echo "# The first commit's message is:" + echo + git cat-file commit HEAD | sed -e '1,/^$/d' + fi + echo + echo "# This is the $(nth_string $COUNT) commit message:" + echo + git cat-file commit $1 | sed -e '1,/^$/d' +} + +peek_next_command () { + sed -n "1s/ .*$//p" < "$TODO" +} + +do_next () { + rm -f "$DOTEST"/message "$DOTEST"/author-script \ + "$DOTEST"/amend || exit + read command sha1 rest < "$TODO" + case "$command" in + '#'*|'') + mark_action_done + ;; + pick|p) + comment_for_reflog pick + + mark_action_done + pick_one $sha1 || + die_with_patch $sha1 "Could not apply $sha1... $rest" + ;; + edit|e) + comment_for_reflog edit + + mark_action_done + pick_one $sha1 || + die_with_patch $sha1 "Could not apply $sha1... $rest" + make_patch $sha1 + : > "$DOTEST"/amend + warn + warn "You can amend the commit now, with" + warn + warn " git commit --amend" + warn + warn "Once you are satisfied with your changes, run" + warn + warn " git rebase --continue" + warn + exit 0 + ;; + squash|s) + comment_for_reflog squash + + has_action "$DONE" || + die "Cannot 'squash' without a previous commit" + + mark_action_done + make_squash_message $sha1 > "$MSG" + case "$(peek_next_command)" in + squash|s) + EDIT_COMMIT= + USE_OUTPUT=output + cp "$MSG" "$SQUASH_MSG" + ;; + *) + EDIT_COMMIT=-e + USE_OUTPUT= + rm -f "$SQUASH_MSG" || exit + ;; + esac + + failed=f + author_script=$(get_author_ident_from_commit HEAD) + output git reset --soft HEAD^ + pick_one -n $sha1 || failed=t + echo "$author_script" > "$DOTEST"/author-script + if test $failed = f + then + # This is like --amend, but with a different message + eval "$author_script" + GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \ + GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \ + GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \ + $USE_OUTPUT git commit --no-verify -F "$MSG" $EDIT_COMMIT || failed=t + fi + if test $failed = t + then + cp "$MSG" "$GIT_DIR"/MERGE_MSG + warn + warn "Could not apply $sha1... $rest" + die_with_patch $sha1 "" + fi + ;; + *) + warn "Unknown command: $command $sha1 $rest" + die_with_patch $sha1 "Please fix this in the file $TODO." + ;; + esac + test -s "$TODO" && return + + comment_for_reflog finish && + HEADNAME=$(cat "$DOTEST"/head-name) && + OLDHEAD=$(cat "$DOTEST"/head) && + SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) && + if test -d "$REWRITTEN" + then + test -f "$DOTEST"/current-commit && + current_commit=$(cat "$DOTEST"/current-commit) && + git rev-parse HEAD > "$REWRITTEN"/$current_commit + if test -f "$REWRITTEN"/$OLDHEAD + then + NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD) + else + NEWHEAD=$OLDHEAD + fi + else + NEWHEAD=$(git rev-parse HEAD) + fi && + case $HEADNAME in + refs/*) + message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" && + git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD && + git symbolic-ref HEAD $HEADNAME + ;; + esac && { + test ! -f "$DOTEST"/verbose || + git diff-tree --stat $(cat "$DOTEST"/head)..HEAD + } && + rm -rf "$DOTEST" && + git gc --auto && + warn "Successfully rebased and updated $HEADNAME." + + exit +} + +do_rest () { + while : + do + do_next + done +} + +while test $# != 0 +do + case "$1" in + --continue) + comment_for_reflog continue + + test -d "$DOTEST" || die "No interactive rebase running" + + # Sanity check + git rev-parse --verify HEAD >/dev/null || + die "Cannot read HEAD" + git update-index --ignore-submodules --refresh && + git diff-files --quiet --ignore-submodules || + die "Working tree is dirty" + + # do we have anything to commit? + if git diff-index --cached --quiet --ignore-submodules HEAD -- + then + : Nothing to commit -- skip this + else + . "$DOTEST"/author-script || + die "Cannot find the author identity" + if test -f "$DOTEST"/amend + then + git reset --soft HEAD^ || + die "Cannot rewind the HEAD" + fi + export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE && + git commit --no-verify -F "$DOTEST"/message -e || + die "Could not commit staged changes." + fi + + require_clean_work_tree + do_rest + ;; + --abort) + comment_for_reflog abort + + git rerere clear + test -d "$DOTEST" || die "No interactive rebase running" + + HEADNAME=$(cat "$DOTEST"/head-name) + HEAD=$(cat "$DOTEST"/head) + case $HEADNAME in + refs/*) + git symbolic-ref HEAD $HEADNAME + ;; + esac && + output git reset --hard $HEAD && + rm -rf "$DOTEST" + exit + ;; + --skip) + comment_for_reflog skip + + git rerere clear + test -d "$DOTEST" || die "No interactive rebase running" + + output git reset --hard && do_rest + ;; + -s|--strategy) + case "$#,$1" in + *,*=*) + STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;; + 1,*) + usage ;; + *) + STRATEGY="-s $2" + shift ;; + esac + ;; + -m|--merge) + # we use merge anyway + ;; + -C*) + die "Interactive rebase uses merge, so $1 does not make sense" + ;; + -v|--verbose) + VERBOSE=t + ;; + -p|--preserve-merges) + PRESERVE_MERGES=t + ;; + -i|--interactive) + # yeah, we know + ;; + ''|-h) + usage + ;; + *) + test -d "$DOTEST" && + die "Interactive rebase already started" + + git var GIT_COMMITTER_IDENT >/dev/null || + die "You need to set your committer info first" + + comment_for_reflog start + + ONTO= + case "$1" in + --onto) + ONTO=$(git rev-parse --verify "$2") || + die "Does not point to a valid commit: $2" + shift; shift + ;; + esac + + require_clean_work_tree + + if test ! -z "$2" + then + output git show-ref --verify --quiet "refs/heads/$2" || + die "Invalid branchname: $2" + output git checkout "$2" || + die "Could not checkout $2" + fi + + HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?" + UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base" + + mkdir "$DOTEST" || die "Could not create temporary $DOTEST" + + test -z "$ONTO" && ONTO=$UPSTREAM + + : > "$DOTEST"/interactive || die "Could not mark as interactive" + git symbolic-ref HEAD > "$DOTEST"/head-name 2> /dev/null || + echo "detached HEAD" > "$DOTEST"/head-name + + echo $HEAD > "$DOTEST"/head + echo $UPSTREAM > "$DOTEST"/upstream + echo $ONTO > "$DOTEST"/onto + test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy + test t = "$VERBOSE" && : > "$DOTEST"/verbose + if test t = "$PRESERVE_MERGES" + then + # $REWRITTEN contains files for each commit that is + # reachable by at least one merge base of $HEAD and + # $UPSTREAM. They are not necessarily rewritten, but + # their children might be. + # This ensures that commits on merged, but otherwise + # unrelated side branches are left alone. (Think "X" + # in the man page's example.) + mkdir "$REWRITTEN" && + for c in $(git merge-base --all $HEAD $UPSTREAM) + do + echo $ONTO > "$REWRITTEN"/$c || + die "Could not init rewritten commits" + done + MERGES_OPTION= + else + MERGES_OPTION=--no-merges + fi + + SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM) + SHORTHEAD=$(git rev-parse --short $HEAD) + SHORTONTO=$(git rev-parse --short $ONTO) + git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \ + --abbrev=7 --reverse --left-right --cherry-pick \ + $UPSTREAM...$HEAD | \ + sed -n "s/^>/pick /p" > "$TODO" + cat >> "$TODO" << EOF + +# Rebase $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO +# +# Commands: +# pick = use commit +# edit = use commit, but stop for amending +# squash = use commit, but meld into previous commit +# +# If you remove a line here THAT COMMIT WILL BE LOST. +# However, if you remove everything, the rebase will be aborted. +# +EOF + + has_action "$TODO" || + die_abort "Nothing to do" + + cp "$TODO" "$TODO".backup + git_editor "$TODO" || + die "Could not execute editor" + + has_action "$TODO" || + die_abort "Nothing to do" + + output git checkout $ONTO && do_rest + ;; + esac + shift +done |