Add tests for rebase -i --root without --onto

diff --git a/git-rebase.sh b/git-rebase.sh
index 69c1374823084804662dbd6b6d510ec2ec3428e9..bde2be88a0198819401d31224d35059ad167be68 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -31,7 +31,7 @@ SUBDIRECTORY_OK=Yes
 OPTIONS_KEEPDASHDASH=
 OPTIONS_SPEC="\
 git rebase [-i] [options] [--onto <newbase>] [<upstream>] [<branch>]
-git rebase [-i] [options] --onto <newbase> --root [<branch>]
+git rebase [-i] [options] [--onto <newbase>] --root [<branch>]
 git-rebase [-i] --continue | --abort | --skip
 --
  Available options are
@@ -43,6 +43,7 @@ s,strategy=!       use the given merge strategy
 no-ff!             cherry-pick all commits, even if unchanged
 m,merge!           use merging strategies to rebase
 i,interactive!     let the user edit the list of commits to rebase
+k,keep-empty      preserve empty commits during rebase
 f,force-rebase!    force rebase even if branch is up to date
 X,strategy-option=! pass the argument through to the merge strategy
 stat!              display a diffstat of what changed upstream
@@ -97,6 +98,7 @@ state_dir=
 action=
 preserve_merges=
 autosquash=
+keep_empty=
 test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
 
 read_basic_state () {
@@ -165,6 +167,7 @@ run_specific_rebase () {
        if [ "$interactive_rebase" = implied ]; then
                GIT_EDITOR=:
                export GIT_EDITOR
+               autosquash=
        fi
        . git-rebase--$type
 }
@@ -220,6 +223,9 @@ do
        -i)
                interactive_rebase=explicit
                ;;
+       -k)
+               keep_empty=yes
+               ;;
        -p)
                preserve_merges=t
                test -z "$interactive_rebase" && interactive_rebase=implied
@@ -358,6 +364,11 @@ and run me again.  I am stopping in case you still have something
 valuable there.'
 fi
 
+if test -n "$rebase_root" && test -z "$onto"
+then
+       test -z "$interactive_rebase" && interactive_rebase=implied
+fi
+
 if test -n "$interactive_rebase"
 then
        type=interactive
@@ -391,7 +402,12 @@ then
        die "invalid upstream $upstream_name"
        upstream_arg="$upstream_name"
 else
-       test -z "$onto" && die "You must specify --onto when using --root"
+       if test -z "$onto"
+       then
+               empty_tree=`git hash-object -t tree /dev/null`
+               onto=`git commit-tree $empty_tree </dev/null`
+               squash_onto="$onto"
+       fi
        unset upstream_name
        unset upstream
        upstream_arg=--root
@@ -418,7 +434,7 @@ case "$onto_name" in
        ;;
 *)
        onto=$(git rev-parse --verify "${onto_name}^0") ||
-       die "Does not point to a valid commit: $1"
+       die "Does not point to a valid commit: $onto_name"
        ;;
 esac