git-branch: show detached HEAD

diff --git a/git-rebase.sh b/git-rebase.sh
index 29028dd5fc0669cd2d7d3b956bfdd2583cc785b7..828c59ce61a8317f23ba9113e4de6e09a58e70ce 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -3,7 +3,7 @@
 # Copyright (c) 2005 Junio C Hamano.
 #
 
-USAGE='[--onto <newbase>] <upstream> [<branch>]'
+USAGE='[-v] [--onto <newbase>] <upstream> [<branch>]'
 LONG_USAGE='git-rebase replaces <branch> with a new branch of the
 same name.  When the --onto option is provided the new branch starts
 out with a HEAD equal to <newbase>, otherwise it is equal to <upstream>
@@ -28,6 +28,7 @@ Example:       git-rebase master~1 topic
   D---E---F---G master          D---E---F---G master
 '
 . git-sh-setup
+set_reflog_action rebase
 
 RESOLVEMSG="
 When you have resolved this problem run \"git rebase --continue\".
@@ -39,6 +40,7 @@ strategy=recursive
 do_merge=
 dotest=$GIT_DIR/.dotest-merge
 prec=4
+verbose=
 
 continue_merge () {
        test -n "$prev_head" || die "prev_head must be defined"
@@ -79,10 +81,18 @@ continue_merge () {
 call_merge () {
        cmt="$(cat $dotest/cmt.$1)"
        echo "$cmt" > "$dotest/current"
-       git-merge-$strategy "$cmt^" -- HEAD "$cmt"
+       hd=$(git-rev-parse --verify HEAD)
+       cmt_name=$(git-symbolic-ref HEAD)
+       msgnum=$(cat $dotest/msgnum)
+       end=$(cat $dotest/end)
+       eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
+       eval GITHEAD_$hd='"$(cat $dotest/onto_name)"'
+       export GITHEAD_$cmt GITHEAD_$hd
+       git-merge-$strategy "$cmt^" -- "$hd" "$cmt"
        rv=$?
        case "$rv" in
        0)
+               unset GITHEAD_$cmt GITHEAD_$hd
                return
                ;;
        1)
@@ -131,13 +141,16 @@ do
                        finish_rb_merge
                        exit
                fi
-               git am --resolved --3way --resolvemsg="$RESOLVEMSG" \
-                       --reflog-action=rebase
+               git am --resolved --3way --resolvemsg="$RESOLVEMSG"
                exit
                ;;
        --skip)
                if test -d "$dotest"
                then
+                       if test -d "$GIT_DIR/rr-cache"
+                       then
+                               git-rerere clear
+                       fi
                        prev_head="`cat $dotest/prev_head`"
                        end="`cat $dotest/end`"
                        msgnum="`cat $dotest/msgnum`"
@@ -151,11 +164,14 @@ do
                        finish_rb_merge
                        exit
                fi
-               git am -3 --skip --resolvemsg="$RESOLVEMSG" \
-                       --reflog-action=rebase
+               git am -3 --skip --resolvemsg="$RESOLVEMSG"
                exit
                ;;
        --abort)
+               if test -d "$GIT_DIR/rr-cache"
+               then
+                       git-rerere clear
+               fi
                if test -d "$dotest"
                then
                        rm -r "$dotest"
@@ -190,6 +206,9 @@ do
                esac
                do_merge=t
                ;;
+       -v|--verbose)
+               verbose=t
+               ;;
        -*)
                usage
                ;;
@@ -266,49 +285,44 @@ onto=$(git-rev-parse --verify "${onto_name}^0") || exit
 
 # Check if we are already based on $onto, but this should be
 # done only when upstream and onto are the same.
-if test "$upstream" = "$onto"
+mb=$(git-merge-base "$onto" "$branch")
+if test "$upstream" = "$onto" && test "$mb" = "$onto"
 then
-       mb=$(git-merge-base "$onto" "$branch")
-       if test "$mb" = "$onto"
-       then
-               echo >&2 "Current branch $branch_name is up to date."
-               exit 0
-       fi
+       echo >&2 "Current branch $branch_name is up to date."
+       exit 0
+fi
+
+if test -n "$verbose"
+then
+       echo "Changes from $mb to $onto:"
+       git-diff-tree --stat --summary "$mb" "$onto"
 fi
 
 # Rewind the head to "$onto"; this saves our current head in ORIG_HEAD.
+echo "First, rewinding head to replay your work on top of it..."
 git-reset --hard "$onto"
 
 # If the $onto is a proper descendant of the tip of the branch, then
 # we just fast forwarded.
-if test "$mb" = "$onto"
+if test "$mb" = "$branch"
 then
-       echo >&2 "Fast-forwarded $branch to $newbase."
+       echo >&2 "Fast-forwarded $branch_name to $onto_name."
        exit 0
 fi
 
 if test -z "$do_merge"
 then
-       git-format-patch -k --stdout --full-index "$upstream"..ORIG_HEAD |
-       git am --binary -3 -k --resolvemsg="$RESOLVEMSG" \
-               --reflog-action=rebase
+       git-format-patch -k --stdout --full-index --ignore-if-in-upstream "$upstream"..ORIG_HEAD |
+       git am --binary -3 -k --resolvemsg="$RESOLVEMSG"
        exit $?
 fi
 
-if test "@@NO_PYTHON@@" && test "$strategy" = "recursive"
-then
-       die 'The recursive merge strategy currently relies on Python,
-which this installation of git was not configured with.  Please consider
-a different merge strategy (e.g. octopus, resolve, stupid, ours)
-or install Python and git with Python support.'
-
-fi
-
 # start doing a rebase with git-merge
 # this is rename-aware if the recursive (default) strategy is used
 
 mkdir -p "$dotest"
 echo "$onto" > "$dotest/onto"
+echo "$onto_name" > "$dotest/onto_name"
 prev_head=`git-rev-parse HEAD^0`
 echo "$prev_head" > "$dotest/prev_head"