Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

internal/docker/docker.go

@@ -0,0 +1,33 @@
+package docker
+
+import "strings"
+
+// ParseImage Adapts some of the logic from the actual Docker library's image parsing routines:
+// https://github.com/docker/distribution/blob/release/2.7/reference/normalize.go
+func ParseImage(image string) (imageName, imageVersion string) {
+	domain := ""
+	remainder := ""
+
+	i := strings.IndexRune(image, '/')
+
+	if i == -1 || (!strings.ContainsAny(image[:i], ".:") && image[:i] != "localhost") {
+		remainder = image
+	} else {
+		domain, remainder = image[:i], image[i+1:]
+	}
+
+	imageVersion = "unknown"
+	i = strings.LastIndex(remainder, ":")
+	if i > -1 {
+		imageVersion = remainder[i+1:]
+		imageName = remainder[:i]
+	} else {
+		imageName = remainder
+	}
+
+	if domain != "" {
+		imageName = domain + "/" + imageName
+	}
+
+	return imageName, imageVersion
+}