update checker code in patchStrategicMerge

api/types/kustomization.go

@@ -7,8 +7,8 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"strings"
 
+	"sigs.k8s.io/kustomize/kyaml/filesys"
 	"sigs.k8s.io/yaml"
 )
 
@@ -218,16 +218,15 @@ func (k *Kustomization) FixKustomizationPostUnmarshalling() {
 // FixKustomizationPreMarshalling fixes things
 // that should occur after the kustomization file
 // has been processed.
-func (k *Kustomization) FixKustomizationPreMarshalling() error {
+func (k *Kustomization) FixKustomizationPreMarshalling(fSys filesys.FileSystem) error {
 	// PatchesJson6902 should be under the Patches field.
 	k.Patches = append(k.Patches, k.PatchesJson6902...)
 	k.PatchesJson6902 = nil
 
 	if k.PatchesStrategicMerge != nil {
 		for _, patchStrategicMerge := range k.PatchesStrategicMerge {
 			// check this patch is file path select.
-			if strings.Count(string(patchStrategicMerge), "\n") < 1 &&
-				(patchStrategicMerge[len(patchStrategicMerge)-5:] == ".yaml" || patchStrategicMerge[len(patchStrategicMerge)-4:] == ".yml") {
+			if _, err := fSys.ReadFile(string(patchStrategicMerge)); err == nil {
 				// path patch
 				k.Patches = append(k.Patches, Patch{Path: string(patchStrategicMerge)})
 			} else {

kustomize/commands/edit/fix/fix.go

@@ -55,9 +55,8 @@ func RunFix(fSys filesys.FileSystem, w io.Writer) error {
 		return err
 	}
 
-	err = m.FixKustomizationPreMarshalling()
-	if err != nil {
-		return err
+	if err := m.FixKustomizationPreMarshalling(fSys); err != nil {
+		return fmt.Errorf("failed to preMarshalling the kustomization file: %w", err)
 	}
 
 	if flags.vars {

kustomize/commands/edit/fix/fix_test.go

@@ -32,6 +32,7 @@ func TestFixCommand(t *testing.T) {
 	tests := []struct {
 		name     string
 		input    string
+		files    map[string]string
 		expected string
 	}{
 		{
@@ -170,6 +171,21 @@ kind: Kustomization
 patchesStrategicMerge:
 - deploy.yaml
 `,
+			files: map[string]string{
+				"deploy.yaml": `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx
+spec:
+  template:
+    spec:
+      containers:
+        - name: nginx
+          env:
+            - name: CONFIG_FILE_PATH
+              value: home.yaml`,
+			},
 			expected: `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -183,6 +199,21 @@ patches:
 patchesStrategicMerge:
 - deploy.yml
 `,
+			files: map[string]string{
+				"deploy.yml": `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+name: nginx
+spec:
+template:
+spec:
+containers:
+  - name: nginx
+    env:
+      - name: CONFIG_FILE_PATH
+        value: home.yaml`,
+			},
 			expected: `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -209,6 +240,21 @@ patchesStrategicMerge:
               - name: CONFIG_FILE_PATH
                 value: home.yaml
 `,
+			files: map[string]string{
+				"deploy.yaml": `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+name: nginx
+spec:
+template:
+spec:
+containers:
+- name: nginx
+env:
+- name: CONFIG_FILE_PATH
+  value: home.yaml`,
+			},
 			expected: `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -239,6 +285,21 @@ patchesJson6902:
   target:
     kind: Deployment
 `,
+			files: map[string]string{
+				"deploy.yaml": `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+name: nginx
+spec:
+template:
+spec:
+containers:
+- name: nginx
+env:
+- name: CONFIG_FILE_PATH
+  value: home.yaml`,
+			},
 			expected: `
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
@@ -310,6 +371,9 @@ kind: Kustomization
 	for _, test := range tests {
 		fSys := filesys.MakeFsInMemory()
 		testutils_test.WriteTestKustomizationWith(fSys, []byte(test.input))
+		for filename, content := range test.files {
+			require.NoError(t, fSys.WriteFile(filename, []byte(content)))
+		}
 		cmd := NewCmdFix(fSys, os.Stdout)
 		require.NoError(t, cmd.RunE(cmd, nil))