X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=git-checkout.sh;h=33f1e87c0c209b89eb785381db62d826818b602d;hb=a2f8028d3d661b314d5a784764f2f5f9e4c2dde0;hp=ed7c2c5f6aab338c844329e3ae3d9c7ce003680f;hpb=fdcb769916c93b53517ef1b4cae447a3333c9b86;p=git.git

diff --git a/git-checkout.sh b/git-checkout.sh
index ed7c2c5f6..33f1e87c0 100755
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -63,12 +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.
@@ -210,7 +211,7 @@ 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 $v --reset -u $new || exit
 
@@ -245,7 +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
@@ -270,15 +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