feat(version): support 18.06.0 tag format

tagging/tagging.go

@@ -7,6 +7,16 @@ import (
 	"github.com/coreos/go-semver/semver"
 )
 
+func splitOff(input string, delim string) string {
+	parts := strings.SplitN(input, delim, 2)
+
+	if len(parts) == 2 {
+		return parts[0]
+	}
+
+	return input
+}
+
 // DefaultTags returns a set of default suggested tags.
 func DefaultTags(ref string) []string {
 	if !strings.HasPrefix(ref, "refs/tags/") {
@@ -27,17 +37,21 @@ func DefaultTags(ref string) []string {
 		}
 	}
 
+	v = stripTagPrefix(ref)
+	v = splitOff(splitOff(v, "+"), "-")
+	dotParts := strings.SplitN(v, ".", 3)
+
 	if version.Major == 0 {
 		return []string{
-			fmt.Sprintf("%d.%d", version.Major, version.Minor),
-			fmt.Sprintf("%d.%d.%d", version.Major, version.Minor, version.Patch),
+			fmt.Sprintf("%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor),
+			fmt.Sprintf("%0*d.%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor, len(dotParts[2]), version.Patch),
 		}
 	}
 
 	return []string{
-		fmt.Sprint(version.Major),
-		fmt.Sprintf("%d.%d", version.Major, version.Minor),
-		fmt.Sprintf("%d.%d.%d", version.Major, version.Minor, version.Patch),
+		fmt.Sprintf("%0*d", len(dotParts[0]), version.Major),
+		fmt.Sprintf("%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor),
+		fmt.Sprintf("%0*d.%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor, len(dotParts[2]), version.Patch),
 	}
 }
 

tagging/tagging_test.go

@@ -21,6 +21,7 @@ func TestDefaultTags(t *testing.T) {
 		// malformed or errors
 		{"refs/tags/x1.0.0", []string{"latest"}},
 		{"v1.0.0", []string{"latest"}},
+		{"refs/tags/v18.06.0", []string{"18", "18.06", "18.06.0"}},
 	}
 
 	for _, test := range tests {