Add no-interpolate feature option to the CLI

cmd/convert.go

@@ -62,6 +62,9 @@ var (
 	// default is true.
 	WithKomposeAnnotation bool
 
+	// NoInterpolation decides if we will interpolate environment variables in the compose file.
+	NoInterpolate bool
+
 	// MultipleContainerMode which enables creating multi containers in a single pod is a developing function.
 	// default is false
 	MultipleContainerMode bool
@@ -121,6 +124,7 @@ var convertCmd = &cobra.Command{
 			YAMLIndent:                  ConvertYAMLIndent,
 			Profiles:                    ConvertProfiles,
 			WithKomposeAnnotation:       WithKomposeAnnotation,
+			NoInterpolate:               NoInterpolate,
 			MultipleContainerMode:       MultipleContainerMode,
 			ServiceGroupMode:            ServiceGroupMode,
 			ServiceGroupName:            ServiceGroupName,
@@ -202,6 +206,7 @@ func init() {
 	convertCmd.Flags().BoolVar(&GenerateNetworkPolicies, "generate-network-policies", false, "Specify whether to generate network policies or not")
 
 	convertCmd.Flags().BoolVar(&WithKomposeAnnotation, "with-kompose-annotation", true, "Add kompose annotations to generated resource")
+	convertCmd.Flags().BoolVar(&NoInterpolate, "no-interpolate", false, "Keep environment variable names in the Compose file")
 
 	// Deprecated commands
 	convertCmd.Flags().BoolVar(&ConvertEmptyVols, "emptyvols", false, "Use Empty Volumes. Do not generate PVCs")

pkg/app/app.go

@@ -218,7 +218,7 @@ func Convert(opt kobject.ConvertOptions) ([]runtime.Object, error) {
 	komposeObject := kobject.KomposeObject{
 		ServiceConfigs: make(map[string]kobject.ServiceConfig),
 	}
-	komposeObject, err = l.LoadFile(opt.InputFiles, opt.Profiles)
+	komposeObject, err = l.LoadFile(opt.InputFiles, opt.Profiles, opt.NoInterpolate)
 	if err != nil {
 		log.Fatalf(err.Error())
 	}

pkg/kobject/kobject.go

@@ -92,6 +92,7 @@ type ConvertOptions struct {
 	ServiceGroupName        string
 	SecretsAsFiles          bool
 	GenerateNetworkPolicies bool
+	NoInterpolate           bool
 }
 
 // IsPodController indicate if the user want to use a controller

pkg/loader/compose/compose.go

@@ -151,7 +151,7 @@ func checkUnsupportedKey(composeProject *types.Project) []string {
 }
 
 // LoadFile loads a compose file into KomposeObject
-func (c *Compose) LoadFile(files []string, profiles []string) (kobject.KomposeObject, error) {
+func (c *Compose) LoadFile(files []string, profiles []string, noInterpolate bool) (kobject.KomposeObject, error) {
 	// Gather the working directory
 	workingDir, err := transformer.GetComposeFileDir(files)
 	if err != nil {
@@ -161,7 +161,7 @@ func (c *Compose) LoadFile(files []string, profiles []string) (kobject.KomposeOb
 	projectOptions, err := cli.NewProjectOptions(
 		files, cli.WithOsEnv,
 		cli.WithWorkingDirectory(workingDir),
-		cli.WithInterpolation(true),
+		cli.WithInterpolation(!noInterpolate),
 		cli.WithProfiles(profiles),
 	)
 	if err != nil {

pkg/loader/loader.go

@@ -25,7 +25,7 @@ import (
 
 // Loader interface defines loader that loads files and converts it to kobject representation
 type Loader interface {
-	LoadFile(files []string, profiles []string) (kobject.KomposeObject, error)
+	LoadFile(files []string, profiles []string, noInterpolate bool) (kobject.KomposeObject, error)
 	///Name() string
 }
 

script/test/cmd/tests.sh

@@ -276,6 +276,12 @@ k8s_output="$KOMPOSE_ROOT/script/test/fixtures/compose-env-interpolation/output-
 convert::expect_success "$k8s_cmd" "$k8s_output" || exit 1
 convert::expect_success "$os_cmd" "$os_output" || exit 1
 
+# Test support for compose env without interpolation
+k8s_cmd="kompose -f $KOMPOSE_ROOT/script/test/fixtures/compose-env-no-interpolation/compose.yaml convert --stdout --no-interpolate --with-kompose-annotation=false"
+k8s_output="$KOMPOSE_ROOT/script/test/fixtures/compose-env-no-interpolation/output-k8s.yaml"
+convert::expect_success "$k8s_cmd" "$k8s_output" || exit 1
+convert::expect_success "$os_cmd" "$os_output" || exit 1
+
 # Test support for subpath volume
 k8s_cmd="kompose -f $KOMPOSE_ROOT/script/test/fixtures/vols-subpath/compose.yaml convert --stdout --with-kompose-annotation=false"
 k8s_output="$KOMPOSE_ROOT/script/test/fixtures/vols-subpath/output-k8s.yaml"

script/test/fixtures/compose-env-no-interpolation/compose.yaml

@@ -0,0 +1,10 @@
+version: '3.8'
+
+services:
+  foo:
+    image: ${DOCKER_REGISTRY-}foo:${IMAGE_TAG:-latest}
+    build: .
+    environment:
+      - VERSION=${IMAGE_TAG:-latest}
+    ports:
+      - 80:80

script/test/fixtures/compose-env-no-interpolation/output-k8s.yaml

@@ -0,0 +1,43 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    io.kompose.service: foo
+  name: foo
+spec:
+  ports:
+    - name: "80"
+      port: 80
+      targetPort: 80
+  selector:
+    io.kompose.service: foo
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    io.kompose.service: foo
+  name: foo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      io.kompose.service: foo
+  template:
+    metadata:
+      labels:
+        io.kompose.service: foo
+    spec:
+      containers:
+        - env:
+            - name: VERSION
+              value: ${IMAGE_TAG:-latest}
+          image: ${DOCKER_REGISTRY-}foo:${IMAGE_TAG:-latest}
+          name: foo
+          ports:
+            - containerPort: 80
+              protocol: TCP
+      restartPolicy: Always
+