X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=git-checkout.sh;h=33f1e87c0c209b89eb785381db62d826818b602d;hb=a2f8028d3d661b314d5a784764f2f5f9e4c2dde0;hp=a7390e808c76dd5c8dab04396974ee5a709497fd;hpb=53a58245863eff3d70aaa3ac75d7d57e843fc91d;p=git.git

diff --git a/git-checkout.sh b/git-checkout.sh
index a7390e808..33f1e87c0 100755
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -17,6 +17,7 @@ newbranch=
 newbranch_log=
 merge=
 quiet=
+v=-v
 LF='
 '
 while [ "$#" != "0" ]; do
@@ -47,6 +48,7 @@ while [ "$#" != "0" ]; do
 		;;
 	"-q")
 		quiet=1
+		v=
 		;;
 	--)
 		break
@@ -61,12 +63,13 @@ while [ "$#" != "0" ]; do
 				echo "unknown flag $arg"
 				exit 1
 			fi
-			new="$rev"
 			new_name="$arg"
 			if git-show-ref --verify --quiet -- "refs/heads/$arg"
 			then
+				rev=$(git-rev-parse --verify "refs/heads/$arg^0")
 				branch="$arg"
 			fi
+			new="$rev"
 		elif rev=$(git-rev-parse --verify "$arg^{tree}" 2>/dev/null)
 		then
 			# checking out selected paths from a tree-ish.
@@ -170,7 +173,7 @@ describe_detached_head () {
 	}
 }
 
-if test -z "$branch$newbranch" && test "$new" != "$old"
+if test -z "$branch$newbranch" && test "$new_name" != "$old_name"
 then
 	detached="$new"
 	if test -n "$oldbranch" && test -z "$quiet"
@@ -180,7 +183,7 @@ If you want to create a new branch from this checkout, you may do so
 (now or later) by using -b with the checkout command again. Example:
   git checkout -b <new_branch_name>"
 	fi
-elif test -z "$oldbranch"
+elif test -z "$oldbranch" && test "$new" != "$old"
 then
 	describe_detached_head 'Previous HEAD position was' "$old"
 fi
@@ -197,7 +200,7 @@ fi
 
 if [ "$force" ]
 then
-    git-read-tree --reset -u $new
+    git-read-tree $v --reset -u $new
 else
     git-update-index --refresh >/dev/null
     merge_error=$(git-read-tree -m -u --exclude-per-directory=.gitignore $old $new 2>&1) || (
@@ -208,9 +211,9 @@ else
 	esac
 
 	# Match the index to the working tree, and do a three-way.
-    	git diff-files --name-only | git update-index --remove --stdin &&
+	git diff-files --name-only | git update-index --remove --stdin &&
 	work=`git write-tree` &&
-	git read-tree --reset -u $new || exit
+	git read-tree $v --reset -u $new || exit
 
 	eval GITHEAD_$new='${new_name:-${branch:-$new}}' &&
 	eval GITHEAD_$work=local &&
@@ -221,7 +224,7 @@ else
 	# this is not a real merge before committing, but just carrying
 	# the working tree changes along.
 	unmerged=`git ls-files -u`
-	git read-tree --reset $new
+	git read-tree $v --reset $new
 	case "$unmerged" in
 	'')	;;
 	*)
@@ -243,7 +246,7 @@ else
     (exit $saved_err)
 fi
 
-# 
+#
 # Switch the HEAD pointer to the new branch if we
 # checked out a branch head, and remove any potential
 # old MERGE_HEAD's (subsequent commits will clearly not
@@ -268,15 +271,7 @@ if [ "$?" -eq 0 ]; then
 		fi
 	elif test -n "$detached"
 	then
-		# NEEDSWORK: we would want a command to detach the HEAD
-		# atomically, instead of this handcrafted command sequence.
-		# Perhaps:
-		#	git update-ref --detach HEAD $new
-		# or something like that...
-		#
-		git-rev-parse HEAD >"$GIT_DIR/HEAD.new" &&
-		mv "$GIT_DIR/HEAD.new" "$GIT_DIR/HEAD" &&
-		git-update-ref -m "checkout: moving to $arg" HEAD "$detached" ||
+		git-update-ref --no-deref -m "checkout: moving to $arg" HEAD "$detached" ||
 			die "Cannot detach HEAD"
 		if test -n "$detach_warn"
 		then