initial

alpha/template/basic/basic.go

@@ -8,13 +8,30 @@ import (
 	"github.com/operator-framework/operator-registry/alpha/action"
 	"github.com/operator-framework/operator-registry/alpha/declcfg"
 	"github.com/operator-framework/operator-registry/pkg/image"
+	"gopkg.in/yaml.v2"
 )
 
+const schema string = "olm.template.basic"
+
+// basic template is a schema and any kind of valid FBC except that `olm.bundle` objects have only image references
+type basicTemplate struct {
+	Schema string `json:"schema"`
+}
+
 type Template struct {
 	Registry image.Registry
 }
 
 func (t Template) Render(ctx context.Context, reader io.Reader) (*declcfg.DeclarativeConfig, error) {
+	bt := basicTemplate{}
+	err := yaml.NewDecoder(reader).Decode(&bt)
+	if err != nil {
+		return nil, err
+	}
+	if bt.Schema != schema {
+		return nil, fmt.Errorf("invalid schema. basic template schema must be %q instead of %q", schema, bt.Schema)
+	}
+
 	cfg, err := declcfg.LoadReader(reader)
 	if err != nil {
 		return cfg, err

alpha/template/composite/builder_test.go

@@ -283,6 +283,8 @@ func TestBasicBuilder(t *testing.T) {
 }
 
 const basicYaml = `---
+schema: olm.template.basic
+---
 defaultChannel: preview
 name: webhook-operator
 schema: olm.package

alpha/template/template.go

@@ -0,0 +1,7 @@
+package template
+
+type Template interface {
+	GetSchemas() []string
+
+}
+

cmd/opm/alpha/template/basic.go

@@ -16,7 +16,6 @@ import (
 func newBasicTemplateCmd() *cobra.Command {
 	var (
 		template basic.Template
-		output   string
 	)
 	cmd := &cobra.Command{
 		Use: "basic basic-template-file",
@@ -37,6 +36,10 @@ When FILE is '-' or not provided, the template is read from standard input`,
 			defer data.Close()
 
 			var write func(declcfg.DeclarativeConfig, io.Writer) error
+			output, err := cmd.Flags().GetString("output")
+			if err != nil {
+				log.Fatalf("unable to determine output format")
+			}
 			switch output {
 			case "yaml":
 				write = declcfg.WriteYAML
@@ -70,6 +73,5 @@ When FILE is '-' or not provided, the template is read from standard input`,
 			}
 		},
 	}
-	cmd.Flags().StringVarP(&output, "output", "o", "json", "Output format (json|yaml)")
 	return cmd
 }

cmd/opm/alpha/template/cmd.go

@@ -8,15 +8,27 @@ import (
 )
 
 func NewCmd() *cobra.Command {
+	var output string
+
 	runCmd := &cobra.Command{
 		Use:   "render-template",
 		Short: "Render a catalog template type",
 		Args:  cobra.NoArgs,
 	}
 
-	runCmd.AddCommand(newBasicTemplateCmd())
-	runCmd.AddCommand(newSemverTemplateCmd())
-	runCmd.AddCommand(newCompositeTemplateCmd())
+	bc := newBasicTemplateCmd()
+	// bc.Hidden = true
+	runCmd.AddCommand(bc)
+
+	sc := newSemverTemplateCmd()
+	// sc.Hidden = true
+	runCmd.AddCommand(sc)
+
+	cc := newCompositeTemplateCmd()
+	// cc.Hidden = true
+	runCmd.AddCommand(cc)
+
+	runCmd.PersistentFlags().StringVarP(&output, "output", "o", "json", "Output format (json|yaml)")
 
 	return runCmd
 }

cmd/opm/alpha/template/composite.go

@@ -14,20 +14,22 @@ import (
 
 func newCompositeTemplateCmd() *cobra.Command {
 	var (
-		output        string
-		validate      bool
-		compositeFile string
-		catalogFile   string
+		validate    bool
+		catalogFile string
 	)
 	cmd := &cobra.Command{
-		Use: "composite",
+		Use: "composite [FILE]",
 		Short: `Generate file-based catalogs from a catalog configuration file 
 and a 'composite template' file`,
 		Long: `Generate file-based catalogs from a catalog configuration file 
 and a 'composite template' file`,
 		Args: cobra.MaximumNArgs(0),
 		Run: func(cmd *cobra.Command, args []string) {
 
+			output, err := cmd.Flags().GetString("output")
+			if err != nil {
+				log.Fatalf("unable to determine output format")
+			}
 			switch output {
 			case "yaml":
 				// do nothing
@@ -43,41 +45,41 @@ and a 'composite template' file`,
 			}
 			defer reg.Destroy()
 
-			// operator author's 'composite.yaml' file
-			compositeReader, err := os.Open(compositeFile)
-			if err != nil {
-				log.Fatalf("opening composite config file %q: %v", compositeFile, err)
-			}
-			defer compositeReader.Close()
-
-			compositePath, err := filepath.Abs(filepath.Dir(compositeFile))
-			if err != nil {
-				log.Fatalf("getting absolute path of composite config file %q: %v", compositeFile, err)
-			}
-
 			// catalog maintainer's 'catalogs.yaml' file
 			tempCatalog, err := composite.FetchCatalogConfig(catalogFile, http.DefaultClient)
 			if err != nil {
 				log.Fatalf(err.Error())
 			}
 			defer tempCatalog.Close()
 
-			template := composite.NewTemplate(
-				composite.WithCatalogFile(tempCatalog),
-				composite.WithContributionFile(compositeReader, compositePath),
-				composite.WithOutputType(output),
-				composite.WithRegistry(reg),
-			)
+			for _, contribution := range args {
+				// operator author's 'composite.yaml' file
+				compositeReader, err := os.Open(contribution)
+				if err != nil {
+					log.Fatalf("opening composite config file %q: %v", contribution, err)
+				}
+				defer compositeReader.Close()
 
-			err = template.Render(cmd.Context(), validate)
-			if err != nil {
-				log.Fatalf("rendering the composite template: %v", err)
+				compositePath, err := filepath.Abs(filepath.Dir(contribution))
+				if err != nil {
+					log.Fatalf("getting absolute path of composite config file %q: %v", contribution, err)
+				}
+
+				template := composite.NewTemplate(
+					composite.WithCatalogFile(tempCatalog),
+					composite.WithContributionFile(compositeReader, compositePath),
+					composite.WithOutputType(output),
+					composite.WithRegistry(reg),
+				)
+
+				err = template.Render(cmd.Context(), validate)
+				if err != nil {
+					log.Fatalf("rendering the composite template: %v", err)
+				}
 			}
 		},
 	}
-	cmd.Flags().StringVarP(&output, "output", "o", "json", "Output format (json|yaml)")
 	cmd.Flags().BoolVar(&validate, "validate", true, "whether or not the created FBC should be validated (i.e 'opm validate')")
-	cmd.Flags().StringVarP(&compositeFile, "composite-config", "c", "composite.yaml", "File to use as the composite configuration file")
 	cmd.Flags().StringVarP(&catalogFile, "catalog-config", "f", "catalogs.yaml", "File to use as the catalog configuration file")
 	return cmd
 }

cmd/opm/alpha/template/semver.go

@@ -15,7 +15,6 @@ import (
 )
 
 func newSemverTemplateCmd() *cobra.Command {
-	output := ""
 	cmd := &cobra.Command{
 		Use: "semver [FILE]",
 		Short: `Generate a file-based catalog from a single 'semver template' file
@@ -35,6 +34,10 @@ When FILE is '-' or not provided, the template is read from standard input`,
 			defer data.Close()
 
 			var write func(declcfg.DeclarativeConfig, io.Writer) error
+			output, err := cmd.Flags().GetString("output")
+			if err != nil {
+				log.Fatalf("unable to determine output format")
+			}
 			switch output {
 			case "json":
 				write = declcfg.WriteJSON
@@ -79,6 +82,5 @@ When FILE is '-' or not provided, the template is read from standard input`,
 		},
 	}
 
-	cmd.Flags().StringVarP(&output, "output", "o", "json", "Output format (json|yaml|mermaid)")
 	return cmd
 }