typo and git ahead info

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

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

@@ -51,7 +51,7 @@ precmd.is_git_repo() {
 		if [[ -r "$_pwd/.git/HEAD" ]]; then
 			return 0
 		else
-			_pwd=${pwd%/*}
+			_pwd=${_pwd%/*}
 		fi
 	done
 
@@ -72,6 +72,14 @@ precmd.git() {
 	done < <(git status --porcelain -bu 2>/dev/null)
 
 	git_branch_name=${git_branch_info%%...*}
+	[[ $git_branch_info =~ ahead\ ([0-9]+) ]] && git_ahead=$match[1]
+
+	git_status_colour='green'
+
+	(( git_ahead )) && {
+		git_status_short+='a'
+		git_status_colour='yellow'
+	}
 
 	(( git_unstaged )) && {
 		git_status_short+='c'
@@ -84,8 +92,6 @@ precmd.git() {
 	}
 
 	git_status_short=${git_status_short:-"ok"}
-	git_status_colour=${git_status_colour:-"green"}
-
 	git_prompt_msg="(%F{cyan}$git_branch_name%f[%F{$git_status_colour}${git_status_short}%f]) "
 
 	printf '%s' $git_prompt_msg