vendor: update buildkit to master@d5c1d785b042

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

vendor/github.com/moby/buildkit/util/sshutil/scpurl.go

@@ -0,0 +1,43 @@
+package sshutil
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"regexp"
+)
+
+var gitSSHRegex = regexp.MustCompile("^([a-zA-Z0-9-_]+)@([a-zA-Z0-9-.]+):(.*?)(?:#(.*))?$")
+
+func IsImplicitSSHTransport(s string) bool {
+	return gitSSHRegex.MatchString(s)
+}
+
+type SCPStyleURL struct {
+	User *url.Userinfo
+	Host string
+
+	Path     string
+	Fragment string
+}
+
+func ParseSCPStyleURL(raw string) (*SCPStyleURL, error) {
+	matches := gitSSHRegex.FindStringSubmatch(raw)
+	if matches == nil {
+		return nil, errors.New("invalid scp-style url")
+	}
+	return &SCPStyleURL{
+		User:     url.User(matches[1]),
+		Host:     matches[2],
+		Path:     matches[3],
+		Fragment: matches[4],
+	}, nil
+}
+
+func (url *SCPStyleURL) String() string {
+	base := fmt.Sprintf("%s@%s:%s", url.User.String(), url.Host, url.Path)
+	if url.Fragment == "" {
+		return base
+	}
+	return base + "#" + url.Fragment
+}