Adding custom helper for regex

template/helpers.go

@@ -17,6 +17,7 @@ package template
 import (
 	"fmt"
 	"net/url"
+	"regexp"
 	"strings"
 	"time"
 	"unicode"
@@ -117,3 +118,8 @@ func uppercaseFirst(s string) string {
 
 	return s
 }
+
+func regexReplace(pattern string, input string, replacement string) string {
+	re := regexp.MustCompile(pattern)
+	return re.ReplaceAllString(input, replacement)
+}

template/helpers_test.go

@@ -90,3 +90,11 @@ func TestUppercaseFirst(t *testing.T) {
 		}
 	}
 }
+
+func TestRegexReplace(t *testing.T) {
+	expected := "hello-my-String-123"
+	actual := regexReplace("(.*?)\\/(.*)", "hello/my-String-123", "$1-$2")
+	if actual != "hello-my-String-123" {
+		t.Errorf("error, expected %s, got %s", expected, actual)
+	}
+}