refactor(semantic): simplify comparing of RubyGem version components (#…

…275)

pkg/semantic/version-rubygems.go

@@ -1,7 +1,6 @@
 package semantic
 
 import (
-	"strconv"
 	"strings"
 )
 
@@ -73,11 +72,9 @@ func canonicalSegments(segs []string) (canSegs []string) {
 }
 
 func compareRubyGemsComponents(a, b []string) int {
-	max := maxInt(len(a), len(b))
+	numberOfComponents := maxInt(len(a), len(b))
 
-	var compare int
-
-	for i := 0; i < max; i++ {
+	for i := 0; i < numberOfComponents; i++ {
 		as := fetch(a, i, "0")
 		bs := fetch(b, i, "0")
 
@@ -86,42 +83,18 @@ func compareRubyGemsComponents(a, b []string) int {
 
 		switch {
 		case aIsNumber && bIsNumber:
-			compare = ai.Cmp(bi)
+			if diff := ai.Cmp(bi); diff != 0 {
+				return diff
+			}
 		case !aIsNumber && !bIsNumber:
-			compare = strings.Compare(as, bs)
+			if diff := strings.Compare(as, bs); diff != 0 {
+				return diff
+			}
 		case aIsNumber:
-			compare = +1
+			return +1
 		default:
-			compare = -1
-		}
-
-		if compare != 0 {
-			if compare > 0 {
-				return 1
-			}
-
-			return -1
-		}
-	}
-
-	if len(a) > len(b) {
-		next := a[len(b)]
-
-		if _, err := strconv.Atoi(next); err == nil {
-			return 1
-		}
-
-		return -1
-	}
-
-	if len(a) < len(b) {
-		next := b[len(a)]
-
-		if _, err := strconv.Atoi(next); err == nil {
 			return -1
 		}
-
-		return +1
 	}
 
 	return 0