rebase: introduce and use pseudo-ref REBASE_HEAD

diff --git a/git-rebase.sh b/git-rebase.sh
index 60b70f3defb5678af099e4c6bd7fe0610035a432..a13a581fe65438dcada8ff05226a808b71fed2ad 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -45,6 +45,7 @@ abort!             abort and check out the original branch
 skip!              skip current patch and continue
 edit-todo!         edit the todo list during an interactive rebase
 quit!              abort but keep HEAD where it is
+show-current-patch! show the patch file being applied or merged
 "
 . git-sh-setup
 set_reflog_action rebase
@@ -181,6 +182,7 @@ You can run "git stash pop" or "git stash drop" at any time.
 }
 
 finish_rebase () {
+       rm -f "$(git rev-parse --git-path REBASE_HEAD)"
        apply_autostash &&
        { git gc --auto || true; } &&
        rm -rf "$state_dir"
@@ -245,7 +247,7 @@ do
        --verify)
                ok_to_skip_pre_rebase=
                ;;
-       --continue|--skip|--abort|--quit|--edit-todo)
+       --continue|--skip|--abort|--quit|--edit-todo|--show-current-patch)
                test $total_argc -eq 2 || usage
                action=${1##--}
                ;;
@@ -412,6 +414,10 @@ quit)
 edit-todo)
        run_specific_rebase
        ;;
+show-current-patch)
+       run_specific_rebase
+       die "BUG: run_specific_rebase is not supposed to return here"
+       ;;
 esac
 
 # Make sure no rebase is in progress
@@ -477,7 +483,7 @@ then
                ;;
        esac
        upstream=$(peel_committish "${upstream_name}") ||
-       die "$(eval_gettext "invalid upstream \$upstream_name")"
+       die "$(eval_gettext "invalid upstream '\$upstream_name'")"
        upstream_arg="$upstream_name"
 else
        if test -z "$onto"
@@ -518,7 +524,7 @@ case "$onto_name" in
 esac
 
 # If the branch to rebase is given, that is the branch we will rebase
-# $branch_name -- branch being rebased, or HEAD (already detached)
+# $branch_name -- branch/commit being rebased, or HEAD (already detached)
 # $orig_head -- commit object name of tip of the branch before rebasing
 # $head_name -- refs/heads/<that-branch> or "detached HEAD"
 switch_to=
@@ -528,15 +534,18 @@ case "$#" in
        branch_name="$1"
        switch_to="$1"
 
-       if git show-ref --verify --quiet -- "refs/heads/$1" &&
-          orig_head=$(git rev-parse -q --verify "refs/heads/$1")
+       # Is it a local branch?
+       if git show-ref --verify --quiet -- "refs/heads/$branch_name" &&
+          orig_head=$(git rev-parse -q --verify "refs/heads/$branch_name")
        then
-               head_name="refs/heads/$1"
-       elif orig_head=$(git rev-parse -q --verify "$1")
+               head_name="refs/heads/$branch_name"
+       # If not is it a valid ref (branch or commit)?
+       elif orig_head=$(git rev-parse -q --verify "$branch_name")
        then
                head_name="detached HEAD"
+
        else
-               die "$(eval_gettext "fatal: no such branch: \$branch_name")"
+               die "$(eval_gettext "fatal: no such branch/commit '\$branch_name'")"
        fi
        ;;
 0)
@@ -547,7 +556,7 @@ case "$#" in
                branch_name=$(expr "z$branch_name" : 'zrefs/heads/\(.*\)')
        else
                head_name="detached HEAD"
-               branch_name=HEAD ;# detached
+               branch_name=HEAD
        fi
        orig_head=$(git rev-parse --verify HEAD) || exit
        ;;
@@ -598,11 +607,23 @@ then
                test -z "$switch_to" ||
                GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $switch_to" \
                        git checkout -q "$switch_to" --
-               say "$(eval_gettext "Current branch \$branch_name is up to date.")"
+               if test "$branch_name" = "HEAD" &&
+                        ! git symbolic-ref -q HEAD
+               then
+                       say "$(eval_gettext "HEAD is up to date.")"
+               else
+                       say "$(eval_gettext "Current branch \$branch_name is up to date.")"
+               fi
                finish_rebase
                exit 0
        else
-               say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
+               if test "$branch_name" = "HEAD" &&
+                        ! git symbolic-ref -q HEAD
+               then
+                       say "$(eval_gettext "HEAD is up to date, rebase forced.")"
+               else
+                       say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
+               fi
        fi
 fi