[sde-update-tree] Enhanced to try to detect a branch for rebasing if none set

bin/sde-update-tree

@@ -62,6 +62,49 @@ cd "$SDEROOT"
 
 tree="${SDEROOT##*/}"
 
+update_git()
+{
+	local branch=$( git symbolic-ref -q HEAD | sed -e 's|^refs/heads/||' )
+	local remote=$( git config branch.$branch.remote )
+	local remote_list=$( git remote )
+	local remote_branch= remote_branch_list=
+
+	if [ -z "$remote_list" ]; then
+		echo "no remotes set"
+		return 0
+	elif [ -n "$remote" -a -z "$( echo "$remote_list" | grep "^$remote\$" )" ]; then
+		echo "$remote: what?! remote is gone!"
+		return 1
+	elif [ -z "$remote" ]; then
+		# uhm, get a good remote
+		if [ "$( echo "$remote_list" | grep "^origin$" )" ]; then
+			remote=origin
+		else
+			remote="$( echo "$remote_list" | head -n 1 )"
+		fi
+
+		# and it's list of branches
+		remote_branch_list=$( git branch -r | sed -n -e "s|^  $remote/||p" | grep -v '^HEAD$' )
+
+		if [ -z "$remote_branch_list" ]; then
+			echo "no remote set, and couldn't guess".
+			return 1
+		elif [ "$( echo "$remote_branch_list" | grep "^$branch$" )" ]; then
+			remote_branch="$branch"
+		elif [ "$( echo "$remote_branch_list" | grep "^master$" )" ]; then
+			remote_branch=master
+		else
+			remote_branch="$( echo "$remote_branch_list" | head -n 1 )"
+		fi
+			
+		echo "no remote set, assuming $remote/$remote_branch."
+		git config branch.$branch.remote "$remote"
+		git config branch.$branch.merge "refs/heads/$remote_branch"
+	fi	
+
+	git reset && git pull --rebase
+}
+
 # hunt for the roots of the sub-working trees
 #
 for x in . package $( ls -1d package/* target/* 2> /dev/null ); do
@@ -81,7 +124,7 @@ for x in . package $( ls -1d package/* target/* 2> /dev/null ); do
 	elif [ -d "$x/.git" ]; then
 		cd "$x";
 		echo "$tree/$x:"
-		( git reset && git pull --rebase ) 2>&1 | indent_output
+		update_git 2>&1 | indent_output
 		cd - > /dev/null
 	elif [ -d "$x/.svn" ]; then
 		cd "$x";