From 66004cec8abdb145ba123a71c9ebd437298c3391 Mon Sep 17 00:00:00 2001
From: Raffael Sahli <raffael.sahli@doodle.com>
Date: Thu, 13 Jul 2023 14:16:30 +0000
Subject: [PATCH] fix: mutex protect krusty

---
 Makefile                    | 2 +-
 internal/build/kustomize.go | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index da83d45..d36061a 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ fmt:
 
 .PHONY: test
 test:
-	go test -coverprofile coverage.out -v ./...
+	go test -race -coverprofile coverage.out -v ./...
 
 .PHONY: e2e-test
 e2e-test: build
diff --git a/internal/build/kustomize.go b/internal/build/kustomize.go
index 9e7d4a3..fe3080f 100644
--- a/internal/build/kustomize.go
+++ b/internal/build/kustomize.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"sync"
 
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"sigs.k8s.io/kustomize/api/konfig"
@@ -17,6 +18,8 @@ import (
 	"sigs.k8s.io/yaml"
 )
 
+var kustomizeBuildMutex sync.Mutex
+
 type KustomizeOpts struct {
 	Path string
 }
@@ -95,6 +98,9 @@ func (k *Kustomize) buildKustomization(path string) (resmap.ResMap, error) {
 		PluginConfig:      krusty.MakeDefaultOptions().PluginConfig,
 	}
 
+	kustomizeBuildMutex.Lock()
+	defer kustomizeBuildMutex.Unlock()
+
 	kustomizer := krusty.MakeKustomizer(buildOptions)
 	return kustomizer.Run(fs, path)
 }