Add bundle actions command

Rebase from master and add all action fields

Remove unused home field from actions cmd

Remove unused skipValidation field in actions cmd

cmd/duffle/bundle.go

@@ -23,6 +23,7 @@ func newBundleCmd(w io.Writer) *cobra.Command {
 		newBundleSignCmd(w),
 		newBundleVerifyCmd(w),
 		newBundleRemoveCmd(w),
+		newBundleActionsCmd(w),
 	)
 	return cmd
 }

cmd/duffle/bundle_actions.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/gosuri/uitable"
+	"github.com/spf13/cobra"
+)
+
+const bundleActionsDesc = ` Lists all actions available in a bundle`
+
+type bundleActionsCmd struct {
+	out        io.Writer
+	bundleFile string
+	insecure   bool
+}
+
+func newBundleActionsCmd(w io.Writer) *cobra.Command {
+	a := &bundleActionsCmd{out: w}
+
+	cmd := &cobra.Command{
+		Use:   "actions BUNDLE",
+		Short: bundleActionsDesc,
+		Long:  bundleActionsDesc,
+		RunE: func(cmd *cobra.Command, args []string) error {
+
+			bundle, err := bundleFileOrArg1(args, a.bundleFile)
+			if err != nil {
+				return err
+			}
+			return a.run(bundle)
+		},
+	}
+
+	cmd.Flags().StringVarP(&a.bundleFile, "file", "f", "", "path to the bundle file to show actions for")
+	cmd.Flags().BoolVarP(&a.insecure, "insecure", "k", false, "Do not verify the bundle (INSECURE)")
+
+	return cmd
+}
+
+func (a *bundleActionsCmd) run(bundleFile string) error {
+
+	// Verify that file exists
+	if fi, err := os.Stat(bundleFile); err != nil {
+		return fmt.Errorf("cannot find bundle file to sign: %v", err)
+	} else if fi.IsDir() {
+		return errors.New("cannot sign a directory")
+	}
+
+	bun, err := loadBundle(bundleFile, a.insecure)
+	if err != nil {
+		return err
+	}
+
+	table := uitable.New()
+	table.MaxColWidth = 100
+	table.Wrap = true
+
+	table.AddRow("ACTION", "STATELESS", "MODIFIES", "DESCRIPTION")
+	for name, act := range bun.Actions {
+		table.AddRow(name, act.Stateless, act.Modifies, act.Description)
+	}
+
+	fmt.Fprintln(a.out, table)
+
+	return nil
+}