vendor: update buildkit to master@cbfd4023383d

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/moby/buildkit/util/gitutil/git_url.go

@@ -0,0 +1,71 @@
+package gitutil
+
+import (
+	"net/url"
+	"regexp"
+	"strings"
+
+	"github.com/moby/buildkit/util/sshutil"
+	"github.com/pkg/errors"
+)
+
+const (
+	HTTPProtocol  string = "http"
+	HTTPSProtocol string = "https"
+	SSHProtocol   string = "ssh"
+	GitProtocol   string = "git"
+)
+
+var (
+	ErrUnknownProtocol = errors.New("unknown protocol")
+	ErrInvalidProtocol = errors.New("invalid protocol")
+)
+
+var supportedProtos = map[string]struct{}{
+	HTTPProtocol:  {},
+	HTTPSProtocol: {},
+	SSHProtocol:   {},
+	GitProtocol:   {},
+}
+
+var protoRegexp = regexp.MustCompile(`^[a-zA-Z0-9]+://`)
+
+// ParseURL parses a git URL and returns a parsed URL object.
+//
+// ParseURL understands implicit ssh URLs such as "git@host:repo", and
+// returns the same response as if the URL were "ssh://git@host/repo".
+func ParseURL(remote string) (*url.URL, error) {
+	if proto := protoRegexp.FindString(remote); proto != "" {
+		proto = strings.ToLower(strings.TrimSuffix(proto, "://"))
+		if _, ok := supportedProtos[proto]; !ok {
+			return nil, errors.Wrap(ErrInvalidProtocol, proto)
+		}
+
+		return url.Parse(remote)
+	}
+
+	if sshutil.IsImplicitSSHTransport(remote) {
+		remote, fragment, _ := strings.Cut(remote, "#")
+		remote, path, _ := strings.Cut(remote, ":")
+		user, host, _ := strings.Cut(remote, "@")
+		if !strings.HasPrefix(path, "/") {
+			path = "/" + path
+		}
+		return &url.URL{
+			Scheme:   SSHProtocol,
+			User:     url.User(user),
+			Host:     host,
+			Path:     path,
+			Fragment: fragment,
+		}, nil
+	}
+
+	return nil, ErrUnknownProtocol
+}
+
+// SplitGitFragments splits a git URL fragment into its respective git
+// reference and subdirectory components.
+func SplitGitFragment(fragment string) (ref string, subdir string) {
+	ref, subdir, _ = strings.Cut(fragment, ":")
+	return ref, subdir
+}