added list-repos flag (#298)

Co-authored-by: Adam Toy <atoy3731@gmail.com>

cmd/hauler/cli/store/info.go

@@ -22,6 +22,7 @@ type InfoOpts struct {
 	OutputFormat string
 	TypeFilter   string
 	SizeUnit     string
+	ListRepos    bool
 }
 
 func (o *InfoOpts) AddFlags(cmd *cobra.Command) {
@@ -29,6 +30,7 @@ func (o *InfoOpts) AddFlags(cmd *cobra.Command) {
 
 	f.StringVarP(&o.OutputFormat, "output", "o", "table", "Output format (table, json)")
 	f.StringVarP(&o.TypeFilter, "type", "t", "all", "Filter on type (image, chart, file, sigs, atts, sbom)")
+	f.BoolVar(&o.ListRepos, "list-repos", false, "List all repository names")
 
 	// TODO: Regex/globbing
 }
@@ -121,6 +123,11 @@ func InfoCmd(ctx context.Context, o *InfoOpts, s *store.Layout) error {
 		return err
 	}
 
+	if o.ListRepos {
+		buildListRepos(items...)
+		return nil
+	}
+
 	// sort items by ref and arch
 	sort.Sort(byReferenceAndArch(items))
 
@@ -135,6 +142,30 @@ func InfoCmd(ctx context.Context, o *InfoOpts, s *store.Layout) error {
 	return nil
 }
 
+func buildListRepos(items ...item) {
+	// Create map to track unique repository names
+	repos := make(map[string]bool)
+
+	for _, i := range items {
+		repoName := ""
+		for j := 0; j < len(i.Reference); j++ {
+			if i.Reference[j] == '/' {
+				repoName = i.Reference[:j]
+				break
+			}
+		}
+		if repoName == "" {
+			repoName = i.Reference
+		}
+		repos[repoName] = true
+	}
+
+	// Collect and print unique repository names
+	for repoName := range repos {
+		fmt.Println(repoName)
+	}
+}
+
 func buildTable(items ...item) {
 	// Create a table for the results
 	table := tablewriter.NewWriter(os.Stdout)