added repocli

pkg/repocli/reference.go

@@ -0,0 +1,56 @@
+package repocli
+
+import (
+	"errors"
+	"net/url"
+	"path"
+	"strings"
+)
+
+type Reference struct {
+	urlobj     *url.URL
+	user, pass string
+	base, tag  string
+}
+
+func NewReference(rawref string) (*Reference, error) {
+	ref := &Reference{}
+	if !strings.Contains(rawref, "://") {
+		rawref = "https://" + rawref
+	}
+	urlobj, err := url.Parse(rawref)
+	if err != nil {
+		return ref, err
+	}
+	if urlobj.User != nil {
+		ref.user = urlobj.User.Username()
+		ref.pass, _ = urlobj.User.Password()
+		urlobj.User = nil
+	}
+	ref.urlobj = urlobj
+
+	repotag := strings.SplitN(ref.urlobj.Path, ":", 2)
+	if len(repotag) != 2 {
+		err = errors.New("Incorrect reference format")
+		return ref, err
+	}
+	ref.base = repotag[0]
+	ref.tag = repotag[1]
+
+	ref.urlobj.Path = "/"
+	ref.urlobj = urlobj
+
+	return ref, err
+}
+
+func (ref *Reference) String() string {
+	return path.Join(ref.urlobj.Host, ref.base+":"+ref.tag)
+}
+
+func (ref *Reference) Repo() string {
+	return path.Join(ref.urlobj.Host, ref.base)
+}
+
+func (ref *Reference) Tag() string {
+	return ref.tag
+}