Update rad init to generate bicep config (#7664)

# Description

Update rad init to generate bicep configuration
<img width="413" alt="Screenshot 2024-06-03 at 10 45 14 PM"
src="https://github.com/radius-project/radius/assets/42750942/1fbe214d-91e6-435c-aec0-57e57485a70d">


## Type of change

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Fixes: #issue_number

---------

Signed-off-by: sk593 <[email protected]>

.gitignore

@@ -23,6 +23,7 @@ vendor/
 # Radius scaffolding
 app.bicep
 .rad/
+bicepconfig.json
 
 # Build Output
 bin/

pkg/cli/cmd/radinit/display.go

@@ -243,6 +243,7 @@ func (m *summaryModel) View() string {
 		message.WriteString(summaryApplicationHeadingIcon)
 		message.WriteString(fmt.Sprintf(summaryApplicationScaffoldHeadingFmt, highlight(options.Application.Name)))
 		message.WriteString(fmt.Sprintf(summaryApplicationScaffoldFile, highlight("app.bicep")))
+		message.WriteString(fmt.Sprintf(summaryApplicationScaffoldFile, highlight("bicepconfig.json")))
 		message.WriteString(fmt.Sprintf(summaryApplicationScaffoldFile, highlight(filepath.Join(".rad", "rad.yaml"))))
 	}
 

pkg/cli/setup/application.go

@@ -20,10 +20,12 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+
+	"github.com/radius-project/radius/pkg/version"
 )
 
 const (
-	appBicepTemplate = `import radius as radius
+	appBicepTemplate = `extension radius
 
 @description('The Radius Application ID. Injected automatically by the rad CLI.')
 param application string
@@ -47,6 +49,18 @@ resource demo 'Applications.Core/containers@2023-10-01-preview' = {
 	radYamlTemplate = `workspace:
   application: %q
 ` // Trailing newline intentional.
+
+	bicepConfigTemplate = `{
+	"experimentalFeaturesEnabled": {
+		"extensibility": true,
+		"extensionRegistry": true,
+		"dynamicTypeLoading": true
+	},
+	"extensions": {
+		"radius": "br:biceptypes.azurecr.io/radius:%s",
+		"aws": "br:biceptypes.azurecr.io/aws:%s"
+	}
+}`
 )
 
 // ScaffoldApplication creates a working sample application in the provided directory
@@ -60,7 +74,7 @@ func ScaffoldApplication(directory string, name string) error {
 		return err
 	}
 
-	// We NEVER overwrite app.bicep if it exists. We assume the user might have changed it, and don't
+	// We NEVER overwrite app.bicep or the bicepconfig.json if it exists. We assume the user might have changed it, and don't
 	// want them to lose their content.
 	//
 	// On the other hand, we ALWAYS overwrite rad.yaml if it exists. We assume that the reason why
@@ -76,6 +90,17 @@ func ScaffoldApplication(directory string, name string) error {
 		return err
 	}
 
+	bicepConfigFilepath := filepath.Join(directory, "bicepconfig.json")
+	_, err = os.Stat(bicepConfigFilepath)
+	if os.IsNotExist(err) {
+		err = os.WriteFile(bicepConfigFilepath, []byte(getVersionedBicepConfig()), 0644)
+		if err != nil {
+			return err
+		}
+	} else if err != nil {
+		return err
+	}
+
 	radYamlFilepath := filepath.Join(directory, ".rad", "rad.yaml")
 	err = os.WriteFile(radYamlFilepath, []byte(fmt.Sprintf(radYamlTemplate, name)), 0644)
 	if err != nil {
@@ -84,3 +109,12 @@ func ScaffoldApplication(directory string, name string) error {
 
 	return nil
 }
+
+func getVersionedBicepConfig() string {
+	tag := version.Channel()
+	if version.IsEdgeChannel() {
+		tag = "latest"
+	}
+
+	return fmt.Sprintf(bicepConfigTemplate, tag, tag)
+}

pkg/cli/setup/application_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package setup
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"testing"
@@ -25,6 +26,8 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
+const latest = "latest"
+
 func Test_ScaffoldApplication_CreatesBothFiles(t *testing.T) {
 	directory := t.TempDir()
 
@@ -33,6 +36,7 @@ func Test_ScaffoldApplication_CreatesBothFiles(t *testing.T) {
 
 	require.FileExists(t, filepath.Join(directory, ".rad", "rad.yaml"))
 	require.FileExists(t, filepath.Join(directory, "app.bicep"))
+	require.FileExists(t, filepath.Join(directory, "bicepconfig.json"))
 
 	b, err := os.ReadFile(filepath.Join(directory, ".rad", "rad.yaml"))
 	require.NoError(t, err)
@@ -51,6 +55,10 @@ func Test_ScaffoldApplication_CreatesBothFiles(t *testing.T) {
 	b, err = os.ReadFile(filepath.Join(directory, "app.bicep"))
 	require.NoError(t, err)
 	require.Equal(t, appBicepTemplate, string(b))
+
+	b, err = os.ReadFile(filepath.Join(directory, "bicepconfig.json"))
+	require.NoError(t, err)
+	require.Equal(t, fmt.Sprintf(bicepConfigTemplate, latest, latest), string(b))
 }
 
 func Test_ScaffoldApplication_KeepsAppBicepButWritesRadYaml(t *testing.T) {
@@ -63,6 +71,8 @@ func Test_ScaffoldApplication_KeepsAppBicepButWritesRadYaml(t *testing.T) {
 	require.NoError(t, err)
 	err = os.WriteFile(filepath.Join(directory, "app.bicep"), []byte("something else"), 0644)
 	require.NoError(t, err)
+	err = os.WriteFile(filepath.Join(directory, "bicepconfig.json"), []byte("something else"), 0644)
+	require.NoError(t, err)
 
 	err = ScaffoldApplication(directory, "cool-application")
 	require.NoError(t, err)
@@ -87,4 +97,8 @@ func Test_ScaffoldApplication_KeepsAppBicepButWritesRadYaml(t *testing.T) {
 	b, err = os.ReadFile(filepath.Join(directory, "app.bicep"))
 	require.NoError(t, err)
 	require.Equal(t, "something else", string(b))
+
+	b, err = os.ReadFile(filepath.Join(directory, "bicepconfig.json"))
+	require.NoError(t, err)
+	require.Equal(t, "something else", string(b))
 }