purl.go

package git

import (
	"fmt"
	"net/url"
	"strings"

	packageurl "github.com/package-url/packageurl-go"
)

// BuildGenericRepoPURL returns an unversioned generic purl
// Example: pkg:generic/github.com/owner/repo
func BuildGenericRepoPURL(repoURL string) (string, error) {
	u, err := url.Parse(repoURL)
	if err != nil {
		return "", fmt.Errorf("invalid repo url: %w", err)
	}

	host := strings.ToLower(u.Hostname())
	path := strings.Trim(strings.TrimSuffix(u.EscapedPath(), ".git"), "/")
	parts := strings.Split(path, "/")
	if len(parts) < 2 {
		return "", fmt.Errorf("invalid repo path in %q", repoURL)
	}

	// Namespace is host + all path segments except the last; name is the last segment.
	ns := strings.Join(append([]string{host}, parts[:len(parts)-1]...), "/")
	name := parts[len(parts)-1]

	p := packageurl.NewPackageURL("generic", ns, name, "", nil, "")

	return p.ToString(), nil
}