add analysis coordination (with dummy analyzer)

cmd/root.go

@@ -4,6 +4,12 @@ import (
 	"fmt"
 	"os"
 
+	"github.com/anchore/imgbom/internal"
+
+	"github.com/anchore/imgbom/imgbom"
+	"github.com/anchore/imgbom/imgbom/scope"
+	"github.com/anchore/stereoscope"
+
 	"github.com/spf13/cobra"
 )
 
@@ -11,13 +17,22 @@ const ApplicationName = "imgbom"
 
 var rootOptions struct {
 	cfgFile string
+	scope   string
 }
 
 var rootCmd = &cobra.Command{
-	Use:   ApplicationName,
-	Short: "A container image BOM tool",
-	Long:  `todo.`,
-	Run:   doRunCmd,
+	Use:   fmt.Sprintf("%s [IMAGE]", ApplicationName),
+	Short: "A container image BOM tool", // TODO: add copy
+	Long: internal.Tprintf(`\
+Supports the following image sources:
+    {{.appName}} yourrepo/yourimage:tag             defaults to using images from a docker daemon
+    {{.appName}} docker://yourrepo/yourimage:tag    explicitly use the docker daemon
+    {{.appName}} tar://path/to/yourimage.tar        use a tarball from disk
+`, map[string]interface{}{
+		"appName": ApplicationName,
+	}),
+	Args: cobra.MaximumNArgs(1),
+	Run:  doRunCmd,
 }
 
 func Execute() {
@@ -29,13 +44,37 @@ func Execute() {
 
 func init() {
 	cobra.OnInitialize(loadApplicationConfig)
-	rootCmd.PersistentFlags().StringVar(&rootOptions.cfgFile, "config", "", "config file")
+	// TODO: add config support
+	//rootCmd.PersistentFlags().StringVarP(&rootOptions.cfgFile, "config", "c", "", "config file")
+
+	// scan options
+	rootCmd.Flags().StringVarP(&rootOptions.scope, "scope", "s", scope.AllLayersScope.String(),
+		fmt.Sprintf("selection of layers to analyze, options=%v", scope.Options))
 }
 
 func loadApplicationConfig() {
-	// TODO...
+	// TODO: add config support
 }
 
 func doRunCmd(cmd *cobra.Command, args []string) {
+	img, err := stereoscope.GetImage(args[0])
+	if err != nil {
+		// TODO: replace with log and exit
+		panic(err)
+	}
 
+	scopeOption := scope.ParseOption(rootOptions.scope)
+	if scopeOption == scope.UnknownScope {
+		// TODO: replace with log and exit
+		panic(scopeOption)
+	}
+
+	catalog, err := imgbom.CatalogImage(img, scopeOption)
+	if err != nil {
+		// TODO: replace with log and exit
+		panic(err)
+	}
+
+	// TODO: remove this with presenter implementation
+	fmt.Printf("%+v\n", catalog)
 }