Add Pull to the contextual menus for refs

PBGitRepository.h

@@ -30,6 +30,7 @@ extern NSString* PBGitRepositoryErrorDomain;
 }
 
 - (void) beginFetchFromRemoteForRef:(PBGitRef *)ref;
+- (void) beginPullFromRemote:(PBGitRef *)remoteRef forRef:(PBGitRef *)ref;
 - (BOOL) checkoutRefish:(id <PBGitRefish>)ref;
 - (BOOL) checkoutFiles:(NSArray *)files fromRefish:(id <PBGitRefish>)ref;
 - (BOOL) mergeWithRefish:(id <PBGitRefish>)ref;

PBGitRepository.m

@@ -504,6 +504,45 @@ NSString* PBGitRepositoryErrorDomain = @"GitXErrorDomain";
 	[PBRemoteProgressSheet beginRemoteProgressSheetForArguments:arguments title:title description:description inRepository:self];
 }
 
+- (void) beginPullFromRemote:(PBGitRef *)remoteRef forRef:(PBGitRef *)ref
+{
+	NSMutableArray *arguments = [NSMutableArray arrayWithObject:@"pull"];
+
+	// a nil remoteRef means lookup the ref's default remote
+	if (!remoteRef || ![remoteRef isRemote]) {
+		NSError *error = nil;
+		remoteRef = [self remoteRefForBranch:ref error:&error];
+		if (!remoteRef) {
+			if (error)
+				[self.windowController showErrorSheet:error];
+			return;
+		}
+	}
+	NSString *remoteName = [remoteRef remoteName];
+	[arguments addObject:remoteName];
+
+	NSString *branchName = nil;
+	NSString *refSpec = nil;
+	if ([ref isRemoteBranch]) {
+		branchName = [ref shortName];
+		refSpec = [ref remoteBranchName];
+	}
+	else if ([ref isRemote] || !ref) {
+		branchName = @"all tracking branches";
+	}
+	else {
+		branchName = [ref shortName];
+		refSpec = [NSString stringWithFormat:@"%@:%@", branchName, branchName];
+	}
+	if (refSpec)
+		[arguments addObject:refSpec];
+
+	NSString *headRefName = [[[self headRef] ref] shortName];
+	NSString *description = [NSString stringWithFormat:@"Pulling %@ from %@ and updating %@", branchName, remoteName, headRefName];
+	NSString *title = @"Pulling from remote";
+	[PBRemoteProgressSheet beginRemoteProgressSheetForArguments:arguments title:title description:description inRepository:self];
+}
+
 - (BOOL) checkoutRefish:(id <PBGitRefish>)ref
 {
 	NSString *refName = nil;

PBRefController.h

@@ -24,6 +24,7 @@
 }
 
 - (void) fetchRemote:(PBRefMenuItem *)sender;
+- (void) pullRemote:(PBRefMenuItem *)sender;
 
 - (void) checkout:(PBRefMenuItem *)sender;
 - (void) merge:(PBRefMenuItem *)sender;

PBRefController.m

@@ -51,6 +51,15 @@
 }
 
 
+#pragma mark Pull
+
+- (void) pullRemote:(PBRefMenuItem *)sender
+{
+	id <PBGitRefish> refish = [sender refish];
+	[historyController.repository beginPullFromRemote:nil forRef:refish];
+}
+
+
 #pragma mark Merge
 
 - (void) merge:(PBRefMenuItem *)sender

PBRefMenuItem.m

@@ -83,6 +83,11 @@
 	NSString *fetchTitle = hasRemote ? [NSString stringWithFormat:@"Fetch %@", remoteName] : @"Fetch";
 	[items addObject:[PBRefMenuItem itemWithTitle:fetchTitle action:@selector(fetchRemote:) enabled:hasRemote]];
 
+	// pull
+	NSString *pullRemoteName = [ref isRemoteBranch] ? [ref shortName] : remoteName;
+	NSString *pullTitle = hasRemote ? [NSString stringWithFormat:@"Pull %@ and update %@", pullRemoteName, headRefName] : @"Pull";
+	[items addObject:[PBRefMenuItem itemWithTitle:pullTitle action:@selector(pullRemote:) enabled:hasRemote]];
+
 	// delete ref
 	[items addObject:[PBRefMenuItem separatorItem]];
 	NSString *deleteTitle = [NSString stringWithFormat:@"Delete %@…", targetRefName];