From c03af62dc93f4c686643789d6d006352e9cb944a Mon Sep 17 00:00:00 2001
From: sberk42 <sberk42@gmail.com>
Date: Sun, 19 Jan 2025 21:35:58 +0100
Subject: [PATCH] fix not allowed chars in labels

---
 main.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/main.go b/main.go
index e817379..773092e 100644
--- a/main.go
+++ b/main.go
@@ -853,13 +853,14 @@ func main() {
 	}
 
 	// init metrics
+	renw := regexp.MustCompile(`\W+`)
 	for _, m := range metrics {
 		pd := &m.PromDesc
 
-		// make labels lower case
+		// make labels lower and replace - with _
 		labels := make([]string, len(pd.VarLabels))
 		for i, l := range pd.VarLabels {
-			labels[i] = strings.ToLower(l)
+			labels[i] = renw.ReplaceAllString(strings.ToLower(strings.ReplaceAll(l, "-", "_")), "")
 		}
 
 		// create fixed labels values