Don't treat x in pre-release and build metadata identifiers as a wild…

v4/range.go

@@ -327,12 +327,12 @@ func expandWildcardVersion(parts [][]string) ([][]string, error) {
 	for _, p := range parts {
 		var newParts []string
 		for _, ap := range p {
-			if strings.Contains(ap, "x") {
-				opStr, vStr, err := splitComparatorVersion(ap)
-				if err != nil {
-					return nil, err
-				}
+			opStr, vStr, err := splitComparatorVersion(ap)
+			if err != nil {
+				return nil, err
+			}
 
+			if containsWildcard(ap) {
 				versionWildcardType := getWildcardType(vStr)
 				flatVersion := createVersionFromWildcard(vStr)
 
@@ -381,6 +381,16 @@ func expandWildcardVersion(parts [][]string) ([][]string, error) {
 	return expandedParts, nil
 }
 
+// containsWildcard returns true if there's a wildcard in any of the major, minor or patch components
+func containsWildcard(v string) bool {
+	return strings.Contains(trimIdentifiers(v), ".x")
+}
+
+// trimIdentifiers removes any pre-release and build metadata from a version
+func trimIdentifiers(v string) string {
+  return strings.Split(strings.Split(v, "+")[0], "-")[0]
+}
+
 func parseComparator(s string) comparator {
 	switch s {
 	case "==":

v4/range_test.go

@@ -202,6 +202,7 @@ func TestGetWildcardType(t *testing.T) {
 		{"x", majorWildcard},
 		{"1.x", minorWildcard},
 		{"1.2.x", patchWildcard},
+		{"1.2.3-x", noneWildcard},
 		{"fo.o.b.ar", noneWildcard},
 	}
 
@@ -387,6 +388,19 @@ func TestParseRange(t *testing.T) {
 			{"1.2.3", true},
 			{"1.2.4", false},
 		}},
+		{"1.2.3-x.x", []tv{
+			{"1.2.3-x.y", false},
+			{"1.2.3-x.x", true},
+		}},
+		{"1.2.3+x.x", []tv{
+			{"1.2.3+x.y", false},
+			{"1.2.3+x.x", true},
+		}},
+		{"1.2.3-x.x+x.x", []tv{
+			{"1.2.3-x.x+x.y", false},
+			{"1.2.3-x.y+x.x", false},
+			{"1.2.3-x.x+x.x", true},
+		}},
 		{"=1.2.3", []tv{
 			{"1.2.2", false},
 			{"1.2.3", true},