is_git_repo and rvm stuff

Signed-off-by: fbt <fbt@fleshless.org>

homedir/.config/zsh.d/modules/prompt

@@ -44,6 +44,20 @@ precmd.svn() {
 	fi
 }
 
+precmd.is_git_repo() {
+	declare _pwd=$PWD
+
+	while [[ -n $_pwd ]]; do
+		if [[ -r "$_pwd/.git/HEAD" ]]; then
+			return 0
+		else
+			_pwd=${pwd%/*}
+		fi
+	done
+
+	return 1
+}
+
 precmd.git() {
 	declare git_unstaged git_untracked git_status_short git_status_colour git_prompt_msg
 
@@ -51,7 +65,7 @@ precmd.git() {
 		return 0
 	fi
 
-	if git rev-parse --git-dir &>/dev/null; then
+	if precmd.is_git_repo; then
 		git_current_branch=$(git rev-parse --abbrev-ref HEAD)
 		
 		while IFS= read -r line; do