ADDED: Mercurial prompt info support even if hg prompt extension is unavailable

themes/agnoster.zsh-theme

@@ -87,18 +87,35 @@ prompt_hg() {
 	local rev status
 	if $(hg id >/dev/null 2>&1); then
 		if $(hg prompt >/dev/null 2>&1); then
-			rev=$(hg prompt {status})
-			if [[ $rev = "?" ]]; then
+			st=$(hg prompt {status})
+			if [[ $st = "?" ]]; then
+				# if files are not added
 				prompt_segment red white
-				rev='±'
-			elif [[ -n $rev ]]; then
+				st='±'
+			elif [[ -n $st ]]; then
+				# if any modification
 				prompt_segment yellow black
-				rev='±'
+				st='±'
+			else
+				# if working copy is clean
+				prompt_segment green black
+			fi
+			echo -n $(hg prompt "⭠ {rev}@{branch}") $st
+		else
+			st=""
+			rev=$(hg id -n 2>/dev/null | sed 's/[^-0-9]//g')
+			branch=$(hg id -b 2>/dev/null)
+			if `hg st | grep -Eq "^\?"`; then
+				prompt_segment red black
+				st='±'
+			elif `hg st | grep -Eq "^(M|A)"`; then
+				prompt_segment yellow black
+				st='±'
 			else
 				prompt_segment green black
 			fi
+			echo -n "⭠ $rev@$branch" $st
 		fi
-		echo -n $(hg prompt "⭠ {rev}@{branch}") $rev
 	fi
 }