Port #1504 (dash separators in version strings) to 2.x

Sparkle/SUAppcastDriver.m

@@ -153,6 +153,7 @@ + (SUAppcastItem * _Nullable)bestItemFromAppcastItems:(NSArray *)appcastItems co
 {
     SUAppcastItem *item = nil;
     for(SUAppcastItem *candidate in appcastItems) {
+        // Note if two items are equal, we must select the first matching one
         if (!item || [comparator compareVersion:item.versionString toVersion:candidate.versionString] == NSOrderedAscending) {
             item = candidate;
         }

Sparkle/SUStandardVersionComparator.m

@@ -33,12 +33,15 @@ typedef NS_ENUM(NSInteger, SUCharacterType) {
     kNumberType,
     kStringType,
     kSeparatorType,
+    kDashType,
 };
 
 - (SUCharacterType)typeOfCharacter:(NSString *)character
 {
     if ([character isEqualToString:@"."]) {
         return kSeparatorType;
+    } else if ([character isEqualToString:@"-"]) {
+        return kDashType;
     } else if ([[NSCharacterSet decimalDigitCharacterSet] characterIsMember:[character characterAtIndex:0]]) {
         return kNumberType;
     } else if ([[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:[character characterAtIndex:0]]) {
@@ -67,6 +70,9 @@ - (NSArray *)splitVersionString:(NSString *)version
     for (i = 1; i <= n; ++i) {
         character = [version substringWithRange:NSMakeRange(i, 1)];
         newType = [self typeOfCharacter:character];
+        if (newType == kDashType) {
+            break;
+        }
         if (oldType != newType || oldType == kSeparatorType) {
             // We've reached a new segment
             NSString *aPart = [[NSString alloc] initWithString:s];

Tests/SUVersionComparisonTest.m

@@ -33,6 +33,15 @@ - (void)testNumbers
     SUAssertAscending(comparator, @"0.1", @"0.1.2");
 }
 
+- (void)testCommitSHAs
+{
+    SUStandardVersionComparator *comparator = [[SUStandardVersionComparator alloc] init];
+
+    SUAssertAscending(comparator, @"1.5.5-335d3e2", @"1.5.6-b252311");
+    SUAssertEqual(comparator, @"1.5.5-335d3e2", @"1.5.5-a655360");
+    SUAssertDescending(comparator, @"1.5.6-b252311", @"1.5.5-335d3e2");
+}
+
 - (void)testPrereleases
 {
     SUStandardVersionComparator *comparator = [[SUStandardVersionComparator alloc] init];