From c69a9586c5da5253927a405c346033fa491a91d0 Mon Sep 17 00:00:00 2001
From: Jonny Stoten <jonny.stoten@docker.com>
Date: Wed, 8 May 2024 10:28:19 +0100
Subject: [PATCH] Remove string contains func (it's in the stdlib)

---
 internal/util/strings.go | 10 ----------
 pkg/policy/policy.go     |  4 ++--
 2 files changed, 2 insertions(+), 12 deletions(-)
 delete mode 100644 internal/util/strings.go

diff --git a/internal/util/strings.go b/internal/util/strings.go
deleted file mode 100644
index b0320b9..0000000
--- a/internal/util/strings.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package util
-
-func StringInSlice(str string, list []string) bool {
-	for _, v := range list {
-		if v == str {
-			return true
-		}
-	}
-	return false
-}
diff --git a/pkg/policy/policy.go b/pkg/policy/policy.go
index ceb8de3..f45ecf7 100644
--- a/pkg/policy/policy.go
+++ b/pkg/policy/policy.go
@@ -6,10 +6,10 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"slices"
 	"strings"
 
 	"github.com/distribution/reference"
-	"github.com/docker/attest/internal/util"
 	"github.com/docker/attest/pkg/oci"
 	"github.com/docker/attest/pkg/tuf"
 
@@ -148,7 +148,7 @@ func findPolicyMatch(named reference.Named, mappings *PolicyMappings) (*PolicyMa
 		}
 		// now search mirrors
 		for _, mirror := range mappings.Mirrors {
-			if util.StringInSlice(reference.Domain(named), mirror.Mirror.Domains) &&
+			if slices.Contains(mirror.Mirror.Domains, reference.Domain(named)) &&
 				strings.HasPrefix(reference.Path(named), mirror.Mirror.Prefix) {
 				for _, mapping := range mappings.Policies {
 					if mapping.Name == mirror.Name {