Add verify CLI and readonly flag

Add a backup subcommand to verify that backup snapshots are present and
wire up the readonly flag.

src/cli/backup/backup.go

@@ -63,6 +63,14 @@ func AddCommands(cmd *cobra.Command) {
 			flags.AddAllStorageFlags(sc)
 		}
 	}
+
+	// Add verify command separately. It's not bound to a single service.
+	verifyCommand := verifyCmd()
+	flags.AddAllProviderFlags(verifyCommand)
+	flags.AddAllStorageFlags(verifyCommand)
+	flags.AddReadOnlyFlag(verifyCommand)
+
+	backupC.AddCommand(verifyCommand)
 }
 
 // ---------------------------------------------------------------------------
@@ -163,6 +171,42 @@ func handleDeleteCmd(cmd *cobra.Command, args []string) error {
 	return cmd.Help()
 }
 
+// The backup verify subcommand.
+// `corso backup verify`
+var verifyCommand = "verify"
+
+func verifyCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   verifyCommand,
+		Short: "Verifies all backups have all their data",
+		RunE:  handleVerifyCmd,
+		Args:  cobra.NoArgs,
+	}
+}
+
+// Handler for calls to `corso backup delete`.
+// Produces the same output as `corso backup delete --help`.
+func handleVerifyCmd(cmd *cobra.Command, args []string) error {
+	ctx := cmd.Context()
+
+	r, _, err := utils.AccountConnectAndWriteRepoConfig(
+		ctx,
+		cmd,
+		// Service doesn't really matter but we need to give it something valid.
+		path.OneDriveService)
+	if err != nil {
+		return Only(ctx, err)
+	}
+
+	defer utils.CloseRepo(ctx, r)
+
+	if err := r.VerifyBackups(ctx); err != nil {
+		return Only(ctx, err)
+	}
+
+	return nil
+}
+
 // ---------------------------------------------------------------------------
 // common handlers
 // ---------------------------------------------------------------------------

src/cli/flags/repo.go

@@ -14,6 +14,7 @@ const (
 	// Corso Flags
 	PassphraseFN      = "passphrase"
 	NewPassphraseFN   = "new-passphrase"
+	ReadOnlyFN        = "readonly"
 	SucceedIfExistsFN = "succeed-if-exists"
 )
 
@@ -25,6 +26,7 @@ var (
 	AWSSessionTokenFV    string
 	PassphraseFV         string
 	NewPhasephraseFV     string
+	ReadOnlyFV           bool
 	SucceedIfExistsFV    bool
 )
 
@@ -59,6 +61,13 @@ func AddAllStorageFlags(cmd *cobra.Command) {
 	AddAWSCredsFlags(cmd)
 }
 
+func AddReadOnlyFlag(cmd *cobra.Command) {
+	fs := cmd.Flags()
+	fs.BoolVar(&ReadOnlyFV, ReadOnlyFN, false, "open repository in read-only mode")
+	//nolint:errcheck
+	fs.MarkHidden(ReadOnlyFN)
+}
+
 func AddAWSCredsFlags(cmd *cobra.Command) {
 	fs := cmd.Flags()
 	fs.StringVar(&AWSAccessKeyFV, AWSAccessKeyFN, "", "S3 access key")

src/cli/utils/options.go

@@ -30,6 +30,7 @@ func Control() control.Options {
 	opt.ToggleFeatures.ExchangeImmutableIDs = flags.EnableImmutableIDFV
 	opt.ToggleFeatures.UseDeltaTree = flags.UseDeltaTreeFV
 	opt.Parallelism.ItemFetch = flags.FetchParallelismFV
+	opt.Repo.ReadOnly = flags.ReadOnlyFV
 
 	return opt
 }