Load commit list in a separate thread

This makes the initial startup much faster. Commits get loaded in a separate
thread, and are displayed every 1000 commits.

There is a bug in here that makes fails a click while it is loading the commit
list. Not sure how to fix this, perhaps send the arrayController?

PBGitRepository.m

@@ -13,16 +13,25 @@
 
 @implementation PBGitRepository
 
+@synthesize commits;
 static NSString* gitPath = @"/usr/bin/env";
 
 + (PBGitRepository*) repositoryWithPath:(NSString*) path
 {
 	[self setGitPath];
-	PBGitRepository* repo = [[PBGitRepository alloc] init];
-	repo.path = path;
+	PBGitRepository* repo = [[PBGitRepository alloc] initWithPath: path];
 	return repo;
 }
 
+- (PBGitRepository*) initWithPath: (NSString*) p
+{
+	self.path = p;
+	NSThread * commitThread = [[NSThread alloc] initWithTarget: self selector: @selector(initializeCommits) object:nil];
+	[commitThread start];
+	return self;
+}
+
+
 + (void) setGitPath
 {
 	char* path = getenv("GIT_PATH");
@@ -60,26 +69,33 @@ static NSString* gitPath = @"/usr/bin/env";
 	commits = obj;
 }
 
-- (NSArray*) commits
+- (void) initializeCommits
 {
-	if (commits != nil)
-		return commits;
+	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 	
-	NSFileHandle* handle = [self handleForCommand:@"log --pretty=format:%H\01%s\01%an HEAD"];
 	NSMutableArray * newArray = [NSMutableArray array];
+	NSDate* start = [NSDate date];
+	NSFileHandle* handle = [self handleForCommand:@"log --pretty=format:%H\01%s\01%an HEAD"];
 	NSString* currentLine = [handle readLine];
-
+	int num = 0;
 	while (currentLine.length > 0) {
 		NSArray* components = [currentLine componentsSeparatedByString:@"\01"];
 		PBGitCommit* newCommit = [[PBGitCommit alloc] initWithRepository: self andSha: [components objectAtIndex:0]];
 		newCommit.subject = [components objectAtIndex:1];
 		newCommit.author = [components objectAtIndex:2];
 		[newArray addObject: newCommit];
+		num++;
+		if (num % 1000 == 0)
+			[self performSelectorOnMainThread:@selector(setCommits:) withObject:newArray waitUntilDone:NO];
 		currentLine = [handle readLine];
 	}
 
-	commits = newArray;
-	return commits;
+	[self performSelectorOnMainThread:@selector(setCommits:) withObject:newArray waitUntilDone:YES];
+	NSTimeInterval duration = [[NSDate date] timeIntervalSinceDate:start];
+	NSLog(@"Loaded %i commits in %f seconds", num, duration);
+
+	[pool release];
+	[NSThread exit];
 }
 
 - (NSFileHandle*) handleForCommand:(NSString *)cmd