rebase: remove $branch as synonym for $orig_head

The variables $branch and $orig_head were used as synonyms. To avoid
confusion, remove $branch. The name 'orig_head' seems more suitable,
since that is the name used when the variable is persisted.

Signed-off-by: Martin von Zweigbergk <martin.von.zweigbergk@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-rebase.sh b/git-rebase.sh
index 0fc580af3314941edb4cb283f6f5964ccd396884..eae2f7ab7f72fa6d74842ca795e603eaf0a7bb98 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -487,10 +487,10 @@ case "$#" in
        switch_to="$1"
 
        if git show-ref --verify --quiet -- "refs/heads/$1" &&
-          branch=$(git rev-parse -q --verify "refs/heads/$1")
+          orig_head=$(git rev-parse -q --verify "refs/heads/$1")
        then
                head_name="refs/heads/$1"
-       elif branch=$(git rev-parse -q --verify "$1")
+       elif orig_head=$(git rev-parse -q --verify "$1")
        then
                head_name="detached HEAD"
        else
@@ -507,24 +507,23 @@ case "$#" in
                head_name="detached HEAD"
                branch_name=HEAD ;# detached
        fi
-       branch=$(git rev-parse --verify "${branch_name}^0") || exit
+       orig_head=$(git rev-parse --verify "${branch_name}^0") || exit
        ;;
 esac
-orig_head=$branch
 
 require_clean_work_tree "rebase" "Please commit or stash them."
 
-# Now we are rebasing commits $upstream..$branch (or with --root,
-# everything leading up to $branch) on top of $onto
+# Now we are rebasing commits $upstream..$orig_head (or with --root,
+# everything leading up to $orig_head) on top of $onto
 
 # Check if we are already based on $onto with linear history,
 # but this should be done only when upstream and onto are the same
 # and if this is not an interactive rebase.
-mb=$(git merge-base "$onto" "$branch")
+mb=$(git merge-base "$onto" "$orig_head")
 if test "$type" != interactive && test "$upstream" = "$onto" &&
        test "$mb" = "$onto" &&
        # linear history?
-       ! (git rev-list --parents "$onto".."$branch" | sane_grep " .* ") > /dev/null
+       ! (git rev-list --parents "$onto".."$orig_head" | sane_grep " .* ") > /dev/null
 then
        if test -z "$force_rebase"
        then
@@ -555,11 +554,11 @@ test "$type" = interactive && run_interactive_rebase
 # Detach HEAD and reset the tree
 say "First, rewinding head to replay your work on top of it..."
 git checkout -q "$onto^0" || die "could not detach HEAD"
-git update-ref ORIG_HEAD $branch
+git update-ref ORIG_HEAD $orig_head
 
 # If the $onto is a proper descendant of the tip of the branch, then
 # we just fast-forwarded.
-if test "$mb" = "$branch"
+if test "$mb" = "$orig_head"
 then
        say "Fast-forwarded $branch_name to $onto_name."
        move_to_original_branch