feat: Add --reset flag to rofl init

Author: matevz

cmd/rofl/mgmt.go

@@ -41,6 +41,7 @@ var (
 
 	appTEE  string
 	appKind string
+	reset   bool
 
 	//go:embed init_artifacts/compose.yaml
 	initArtifactCompose []byte
@@ -64,31 +65,44 @@ var (
 			err = os.Chdir(appPath)
 			cobra.CheckErr(err)
 
-			// Fail in case there is an existing manifest.
-			if buildRofl.ManifestExists() {
-				cobra.CheckErr("refusing to overwrite existing manifest")
-			}
+			var manifest *buildRofl.Manifest
+			if !reset {
+				// Fail in case there is an existing manifest.
+				if buildRofl.ManifestExists() {
+					cobra.CheckErr("Refusing to overwrite existing manifest.\nHint: To reset existing ROFL manifest, pass --reset flag.")
+				}
 
-			// Create a default manifest without any deployments.
-			// TODO: Extract author and repository from Git configuration if available.
-			manifest := buildRofl.Manifest{
-				Name:    appName,
-				Version: "0.1.0",
-				TEE:     appTEE,
-				Kind:    appKind,
-				Resources: buildRofl.ResourcesConfig{
-					Memory:   512,
-					CPUCount: 1,
-					Storage: &buildRofl.StorageConfig{
-						Kind: buildRofl.StorageKindDiskPersistent,
-						Size: 512,
+				fmt.Printf("Creating a new app with default policy...\n")
+
+				// Create a default manifest without any deployments.
+				manifest = &buildRofl.Manifest{
+					Name:    appName,
+					Version: "0.1.0",
+					TEE:     appTEE,
+					Kind:    appKind,
+					Resources: buildRofl.ResourcesConfig{
+						Memory:   512,
+						CPUCount: 1,
 					},
-				},
+				}
+			} else {
+				manifest, err = buildRofl.LoadManifest()
+				cobra.CheckErr(err)
+
+				fmt.Printf("\n")
+				if !common.GetAnswerYes() {
+					common.Confirm("Reset existing app manifest file by removing all configured ROFL deployments, secrets and policies", "not resetting")
+				}
+
+				manifest.Name = appName
+				manifest.Deployments = make(map[string]*buildRofl.Deployment)
 			}
+
+			// TODO: Extract author and repository from Git configuration if available.
+
 			err = manifest.Validate()
 			cobra.CheckErr(err)
 
-			fmt.Printf("Creating a new ROFL app with default policy...\n")
 			fmt.Printf("Name:     %s\n", manifest.Name)
 			fmt.Printf("Version:  %s\n", manifest.Version)
 			fmt.Printf("TEE:      %s\n", manifest.TEE)
@@ -828,6 +842,8 @@ func detectOrCreateComposeFile() string {
 func init() {
 	initCmd.Flags().StringVar(&appTEE, "tee", "tdx", "TEE kind [tdx, sgx]")
 	initCmd.Flags().StringVar(&appKind, "kind", "container", "ROFL app kind [container, raw]")
+	initCmd.Flags().BoolVar(&reset, "reset", false, "reset the existing ROFL manifest")
+	initCmd.Flags().AddFlagSet(common.AnswerYesFlag)
 
 	createCmd.Flags().AddFlagSet(common.SelectorFlags)
 	createCmd.Flags().AddFlagSet(common.RuntimeTxFlags)

docs/rofl.md

@@ -18,17 +18,20 @@ OFfchain Logic (ROFL)][rofl] apps:
 
 ## Initialize a new ROFL app manifest {#init}
 
-The `rofl init` command will prepare a new ROFL app manifest in the given
-directory (defaults to the current directory). The manifest is a YAML file named
+The `rofl init` command will prepare a new ROFL manifest in the given directory
+(defaults to the current directory). The manifest is a YAML file named
 `rofl.yaml` which defines the versions of all components, upgrade policies, etc.
 needed to manage, build and deploy the ROFL app.
 
 ![code shell](../examples/rofl/init.in.static)
 
 ![code](../examples/rofl/init.out.static)
 
-Note that by default the manifest will not contain any deployments. In order to
-create deployments, use `rofl create`.
+You can create a new ROFL manifest file based on the existing one by passing
+`--reset` flag. This is useful if you want to make your own deployment of
+the existing ROFL project. It will remove information on previous user-specific
+deployments but keep information such as the minimum CPU, memory and storage
+requirements.
 
 ## Create a new ROFL app on the network {#create}