add support for runtime config to scaffold cmd

Signed-off-by: Rajat Jindal <[email protected]>

pkg/cmd/scaffold.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"bytes"
+	"encoding/base64"
 	"fmt"
 	"log"
 	"os"
@@ -12,17 +13,19 @@ import (
 )
 
 type ScaffoldOptions struct {
-	from     string
-	replicas int32
-	output   string
+	from       string
+	replicas   int32
+	output     string
+	configfile string
 }
 
 var scaffoldOpts = ScaffoldOptions{}
 
 type appConfig struct {
-	Name     string
-	Image    string
-	Replicas int32
+	Name          string
+	Image         string
+	Replicas      int32
+	RuntimeConfig string
 }
 
 var manifestStr = `apiVersion: core.spinoperator.dev/v1
@@ -32,6 +35,20 @@ metadata:
 spec:
   image: "{{ .Image }}"
   replicas: {{ .Replicas }}
+{{- if .RuntimeConfig }}
+  runtimeConfig:
+    loadFromSecret: {{ .Name }}-runtime-config
+  {{- end }}
+{{ if .RuntimeConfig -}}
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ .Name }}-runtime-config
+type: Opaque
+data:
+  runtime-config.toml: {{ .RuntimeConfig }}
+{{ end -}}
 `
 
 var scaffoldCmd = &cobra.Command{
@@ -71,6 +88,15 @@ func scaffold(opts ScaffoldOptions) ([]byte, error) {
 		Replicas: opts.replicas,
 	}
 
+	if opts.configfile != "" {
+		raw, err := os.ReadFile(opts.configfile)
+		if err != nil {
+			return nil, err
+		}
+
+		config.RuntimeConfig = base64.StdEncoding.EncodeToString(raw)
+	}
+
 	tmpl, err := template.New("spinapp").Parse(manifestStr)
 	if err != nil {
 		return nil, err
@@ -89,6 +115,8 @@ func init() {
 	scaffoldCmd.Flags().Int32VarP(&scaffoldOpts.replicas, "replicas", "r", 2, "Number of replicas for the spin app")
 	scaffoldCmd.Flags().StringVarP(&scaffoldOpts.from, "from", "f", "", "Reference in the registry of the Spin application")
 	scaffoldCmd.Flags().StringVarP(&scaffoldOpts.output, "out", "o", "", "path to file to write manifest yaml")
+	scaffoldCmd.Flags().StringVarP(&scaffoldOpts.configfile, "runtime-config-file", "c", "", "path to runtime config file")
+
 	scaffoldCmd.MarkFlagRequired("from")
 
 	rootCmd.AddCommand(scaffoldCmd)

pkg/cmd/scaffold_test.go

@@ -22,6 +22,15 @@ func TestScaffoldCmd(t *testing.T) {
 			},
 			expected: "scaffold_image.yml",
 		},
+		{
+			name: "runtime config is provided",
+			opts: ScaffoldOptions{
+				from:       "ghcr.io/foo/example-app:v0.1.0",
+				replicas:   2,
+				configfile: "testdata/runtime-config.toml",
+			},
+			expected: "scaffold_runtime_config.yml",
+		},
 	}
 
 	for _, tc := range testcases {

pkg/cmd/testdata/runtime-config.toml

@@ -0,0 +1 @@
+log_dir = "/asdf"

pkg/cmd/testdata/scaffold_runtime_config.yml

@@ -0,0 +1,17 @@
+apiVersion: core.spinoperator.dev/v1
+kind: SpinApp
+metadata:
+  name: example-app
+spec:
+  image: "ghcr.io/foo/example-app:v0.1.0"
+  replicas: 2
+  runtimeConfig:
+    loadFromSecret: example-app-runtime-config
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: example-app-runtime-config
+type: Opaque
+data:
+  runtime-config.toml: bG9nX2RpciA9ICIvYXNkZiIK