]> asedeno.scripts.mit.edu Git - git.git/blobdiff - git-rebase--interactive.sh
Merge git://repo.or.cz/git-gui
[git.git] / git-rebase--interactive.sh
index edb6ec6ed00b74764764802d0ebae56d223a2ac6..1172e47571dfe1d6dd088381d63045fd5eae3db3 100755 (executable)
@@ -26,6 +26,7 @@ i,interactive      always used (no-op)
 continue           continue rebasing process
 abort              abort rebasing process and restore original branch
 skip               skip current patch and continue rebasing process
+no-verify          override pre-rebase hook from stopping the operation
 "
 
 . git-sh-setup
@@ -37,10 +38,12 @@ DONE="$DOTEST"/done
 MSG="$DOTEST"/message
 SQUASH_MSG="$DOTEST"/message-squash
 REWRITTEN="$DOTEST"/rewritten
+DROPPED="$DOTEST"/dropped
 PRESERVE_MERGES=
 STRATEGY=
 ONTO=
 VERBOSE=
+OK_TO_SKIP_PRE_REBASE=
 
 GIT_CHERRY_PICK_HELP="  After resolving the conflicts,
 mark the corrected paths with 'git add <paths>', and
@@ -65,6 +68,17 @@ output () {
        esac
 }
 
+run_pre_rebase_hook () {
+       if test -z "$OK_TO_SKIP_PRE_REBASE" &&
+          test -x "$GIT_DIR/hooks/pre-rebase"
+       then
+               "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
+                       echo >&2 "The pre-rebase hook refused to rebase."
+                       exit 1
+               }
+       fi
+}
+
 require_clean_work_tree () {
        # test if working tree is dirty
        git rev-parse --verify HEAD > /dev/null &&
@@ -159,21 +173,39 @@ pick_one_preserving_merges () {
 
        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"
+               if test "$fast_forward" = t
+               then
+                       cat "$DOTEST"/current-commit | while read current_commit
+                       do
+                               git rev-parse HEAD > "$REWRITTEN"/$current_commit
+                       done
+                       rm "$DOTEST"/current-commit ||
+                       die "Cannot write current commit's replacement sha1"
+               fi
        fi
 
-       echo $sha1 > "$DOTEST"/current-commit
+       echo $sha1 >> "$DOTEST"/current-commit
 
        # rewrite parents; if none were rewritten, we can fast-forward.
        new_parents=
-       for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
+       pend=" $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)"
+       while [ "$pend" != "" ]
        do
+               p=$(expr "$pend" : ' \([^ ]*\)')
+               pend="${pend# $p}"
+
                if test -f "$REWRITTEN"/$p
                then
                        new_p=$(cat "$REWRITTEN"/$p)
+
+                       # If the todo reordered commits, and our parent is marked for
+                       # rewriting, but hasn't been gotten to yet, assume the user meant to
+                       # drop it on top of the current HEAD
+                       if test -z "$new_p"
+                       then
+                               new_p=$(git rev-parse HEAD)
+                       fi
+
                        test $p != $new_p && fast_forward=f
                        case "$new_parents" in
                        *$new_p*)
@@ -183,7 +215,13 @@ pick_one_preserving_merges () {
                                ;;
                        esac
                else
-                       new_parents="$new_parents $p"
+                       if test -f "$DROPPED"/$p
+                       then
+                               fast_forward=f
+                               pend=" $(cat "$DROPPED"/$p)$pend"
+                       else
+                               new_parents="$new_parents $p"
+                       fi
                fi
        done
        case $fast_forward in
@@ -193,15 +231,19 @@ pick_one_preserving_merges () {
                        die "Cannot fast forward to $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"
+
+               if [ "$1" != "-n" ]
+               then
+                       # detach HEAD to current parent
+                       output git checkout $first_parent 2> /dev/null ||
+                               die "Cannot move HEAD to $first_parent"
+               fi
 
                case "$new_parents" in
                ' '*' '*)
+                       test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
+
                        # redo merge
                        author_script=$(get_author_ident_from_commit $sha1)
                        eval "$author_script"
@@ -267,7 +309,7 @@ do_next () {
                "$DOTEST"/amend || exit
        read command sha1 rest < "$TODO"
        case "$command" in
-       '#'*|'')
+       '#'*|''|noop)
                mark_action_done
                ;;
        pick|p)
@@ -304,23 +346,28 @@ do_next () {
 
                mark_action_done
                make_squash_message $sha1 > "$MSG"
+               failed=f
+               author_script=$(get_author_ident_from_commit HEAD)
+               output git reset --soft HEAD^
+               pick_one -n $sha1 || failed=t
                case "$(peek_next_command)" in
                squash|s)
                        EDIT_COMMIT=
                        USE_OUTPUT=output
+                       MSG_OPT=-F
+                       MSG_FILE="$MSG"
                        cp "$MSG" "$SQUASH_MSG"
                        ;;
                *)
                        EDIT_COMMIT=-e
                        USE_OUTPUT=
+                       MSG_OPT=
+                       MSG_FILE=
                        rm -f "$SQUASH_MSG" || exit
+                       cp "$MSG" "$GIT_DIR"/SQUASH_MSG
+                       rm -f "$GIT_DIR"/MERGE_MSG || exit
                        ;;
                esac
-
-               failed=f
-               author_script=$(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 $failed = f
                then
@@ -329,7 +376,7 @@ do_next () {
                        GIT_AUTHOR_NAME="$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
+                       $USE_OUTPUT git commit --no-verify $MSG_OPT "$MSG_FILE" $EDIT_COMMIT || failed=t
                fi
                if test $failed = t
                then
@@ -350,20 +397,7 @@ do_next () {
        HEADNAME=$(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=$(git rev-parse HEAD)
-       fi &&
+       NEWHEAD=$(git rev-parse HEAD) &&
        case $HEADNAME in
        refs/*)
                message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
@@ -406,6 +440,11 @@ get_saved_options () {
 while test $# != 0
 do
        case "$1" in
+       --no-verify)
+               OK_TO_SKIP_PRE_REBASE=yes
+               ;;
+       --verify)
+               ;;
        --continue)
                is_standalone "$@" || usage
                get_saved_options
@@ -507,6 +546,7 @@ first and then run 'git rebase --continue' again."
                ;;
        --)
                shift
+               run_pre_rebase_hook ${1+"$@"}
                test $# -eq 1 -o $# -eq 2 || usage
                test -d "$DOTEST" &&
                        die "Interactive rebase already started"
@@ -556,18 +596,70 @@ first and then run 'git rebase --continue' again."
                                echo $ONTO > "$REWRITTEN"/$c ||
                                        die "Could not init rewritten commits"
                        done
+                       # No cherry-pick because our first pass is to determine
+                       # parents to rewrite and skipping dropped commits would
+                       # prematurely end our probe
                        MERGES_OPTION=
+                       first_after_upstream="$(git rev-list --reverse --first-parent $UPSTREAM..$HEAD | head -n 1)"
                else
-                       MERGES_OPTION=--no-merges
+                       MERGES_OPTION="--no-merges --cherry-pick"
                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 \
+                       --abbrev=7 --reverse --left-right --topo-order \
                        $UPSTREAM...$HEAD | \
-                       sed -n "s/^>/pick /p" > "$TODO"
+                       sed -n "s/^>//p" | while read shortsha1 rest
+               do
+                       if test t != "$PRESERVE_MERGES"
+                       then
+                               echo "pick $shortsha1 $rest" >> "$TODO"
+                       else
+                               sha1=$(git rev-parse $shortsha1)
+                               preserve=t
+                               for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
+                               do
+                                       if test -f "$REWRITTEN"/$p -a \( $p != $UPSTREAM -o $sha1 = $first_after_upstream \)
+                                       then
+                                               preserve=f
+                                       fi
+                               done
+                               if test f = "$preserve"
+                               then
+                                       touch "$REWRITTEN"/$sha1
+                                       echo "pick $shortsha1 $rest" >> "$TODO"
+                               fi
+                       fi
+               done
+
+               # Watch for commits that been dropped by --cherry-pick
+               if test t = "$PRESERVE_MERGES"
+               then
+                       mkdir "$DROPPED"
+                       # Save all non-cherry-picked changes
+                       git rev-list $UPSTREAM...$HEAD --left-right --cherry-pick | \
+                               sed -n "s/^>//p" > "$DOTEST"/not-cherry-picks
+                       # Now all commits and note which ones are missing in
+                       # not-cherry-picks and hence being dropped
+                       git rev-list $UPSTREAM..$HEAD |
+                       while read rev
+                       do
+                               if test -f "$REWRITTEN"/$rev -a "$(grep "$rev" "$DOTEST"/not-cherry-picks)" = ""
+                               then
+                                       # Use -f2 because if rev-list is telling us this commit is
+                                       # not worthwhile, we don't want to track its multiple heads,
+                                       # just the history of its first-parent for others that will
+                                       # be rebasing on top of it
+                                       git rev-list --parents -1 $rev | cut -d' ' -f2 > "$DROPPED"/$rev
+                                       short=$(git rev-list -1 --abbrev-commit --abbrev=7 $rev)
+                                       grep -v "^[a-z][a-z]* $short" <"$TODO" > "${TODO}2" ; mv "${TODO}2" "$TODO"
+                                       rm "$REWRITTEN"/$rev
+                               fi
+                       done
+               fi
+               test -s "$TODO" || echo noop >> "$TODO"
                cat >> "$TODO" << EOF
 
 # Rebase $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO