add replay and log to the usage string of git-bisect

diff --git a/git-checkout.sh b/git-checkout.sh
index 99a81f509a081481c9ab96bd6d0d39a6afec93e1..14835a4aa982af88d758ea014afacf7b2fb1bb1e 100755 (executable)
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -164,22 +164,9 @@ If you want to create a new branch from this checkout, you may do so
 (now or later) by using -b with the checkout command again. Example:
   git checkout -b <new_branch_name>"
        fi
-elif test -z "$oldbranch" && test -n "$branch"
+elif test -z "$oldbranch" && test -z "$quiet"
 then
-       # Coming back...
-       if test -z "$force"
-       then
-               git show-ref -d -s | grep "$old" >/dev/null || {
-                       echo >&2 \
-"You are not on any branch and switching to branch '$new_name'
-may lose your changes.  At this point, you can do one of two things:
- (1) Decide it is Ok and say 'git checkout -f $new_name';
- (2) Start a new branch from the current commit, by saying
-     'git checkout -b <branch-name>'.
-Leaving your HEAD detached; not switching to branch '$new_name'."
-                       exit 1;
-               }
-       fi
+       echo >&2 "Previous HEAD position was $old"
 fi
 
 if [ "X$old" = X ]
@@ -257,7 +244,7 @@ if [ "$?" -eq 0 ]; then
        fi
        if test -n "$branch"
        then
-               GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD "refs/heads/$branch"
+               GIT_DIR="$GIT_DIR" git-symbolic-ref -m "checkout: moving to $branch" HEAD "refs/heads/$branch"
                if test -z "$quiet"
                then
                        echo >&2 "Switched to${newbranch:+ a new} branch \"$branch\""
@@ -270,8 +257,9 @@ if [ "$?" -eq 0 ]; then
                #       git update-ref --detach HEAD $new
                # or something like that...
                #
-               echo "$detached" >"$GIT_DIR/HEAD.new" &&
-               mv "$GIT_DIR/HEAD.new" "$GIT_DIR/HEAD" ||
+               git-rev-parse HEAD >"$GIT_DIR/HEAD.new" &&
+               mv "$GIT_DIR/HEAD.new" "$GIT_DIR/HEAD" &&
+               git-update-ref -m "checkout: moving to $arg" HEAD "$detached" ||
                        die "Cannot detach HEAD"
                if test -n "$detach_warn"
                then