Completing the document-based app setup.

Multiple repositories can now be opened by using the File → Open… menu option.
Each document is a PBGitRepository with a PBDetailController controlling the window. PBRepositoryDocumentController is the document controller.
When launched, the application will attempt to open a repository with the current directory as its path. If this fails it will display an open panel to allow the user to select one.

ApplicationController.h

@@ -11,12 +11,11 @@
 
 @interface ApplicationController : NSObject 
 {
-    IBOutlet NSWindow *window;
-	IBOutlet PBGitRepository* repository;
+	IBOutlet NSWindow *window;
 	IBOutlet id firstResponder;
-    NSPersistentStoreCoordinator *persistentStoreCoordinator;
-    NSManagedObjectModel *managedObjectModel;
-    NSManagedObjectContext *managedObjectContext;
+	NSPersistentStoreCoordinator *persistentStoreCoordinator;
+	NSManagedObjectModel *managedObjectModel;
+	NSManagedObjectContext *managedObjectContext;
 }
 
 - (NSPersistentStoreCoordinator *)persistentStoreCoordinator;

ApplicationController.m

@@ -9,41 +9,41 @@
 #import "ApplicationController.h"
 #import "PBGitRevisionCell.h"
 #import "PBDetailController.h"
+#import "PBRepositoryDocumentController.h"
 
 @implementation ApplicationController
 
-@synthesize repository;
-
-- (ApplicationController*) init
+- (ApplicationController*)init
 {
 #ifndef NDEBUG
 	[NSApp activateIgnoringOtherApps:YES];
 #endif
 
-	if([[NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/QuickLookUI.framework"] load])
-		NSLog(@"Quick Look loaded!");
-
-	// Find the current repository
-	char* a = getenv("PWD");
-	NSString* path;
-	if (a != nil) 
-		path = [NSString stringWithCString:a];
-	else {
-		// Show an open dialog
-		NSOpenPanel* openDlg = [NSOpenPanel openPanel];
-		[openDlg setCanChooseFiles:NO];
-		[openDlg setCanChooseDirectories:YES];
-		if ( [openDlg runModalForDirectory:nil file:nil] == NSOKButton )
-			path = [openDlg filename];
-		else
-			exit(1);
+	if(self = [super init]) {
+		if([[NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/QuickLookUI.framework"] load])
+			NSLog(@"Quick Look loaded!");
 	}
-	
-	self.repository = [PBGitRepository repositoryWithPath:path];
-	[[PBDetailController alloc] initWithRepository:self.repository];
+
 	return self;
 }
 
+- (void)applicationDidFinishLaunching:(NSNotification*)notification
+{
+	// Only try to open a default document if there are no documents open already.
+	// For example, the application might have been launched by double-clicking a .git repository,
+	// or by dragging a folder to the app icon
+	if ([[[PBRepositoryDocumentController sharedDocumentController] documents] count] == 0) {
+		// Try to open the current directory as a git repository
+		NSURL *url     = [NSURL fileURLWithPath:[[NSFileManager defaultManager] currentDirectoryPath]];
+		NSError *error = nil;
+		if (!url || [[PBRepositoryDocumentController sharedDocumentController] openDocumentWithContentsOfURL:url display:YES error:&error] == NO) {
+			// The current directory could not be opened (most likely it’s not a git repository)
+			// so show an open panel for the user to select a repository to view
+			[[PBRepositoryDocumentController sharedDocumentController] openDocument:self];
+		}
+	}
+}
+
 - (void) windowWillClose: sender
 {
 	[firstResponder terminate: sender];

GitX.xcodeproj/project.pbxproj

@@ -13,6 +13,7 @@
 		8D11072D0486CEB800E47090 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 29B97316FDCFA39411CA2CEA /* main.m */; settings = {ATTRIBUTES = (); }; };
 		8D11072F0486CEB800E47090 /* Cocoa.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 1058C7A1FEA54F0111CA2CBB /* Cocoa.framework */; };
 		911111E20E58BD5A00BF76B4 /* RepositoryWindow.xib in Resources */ = {isa = PBXBuildFile; fileRef = 911111E00E58BD5A00BF76B4 /* RepositoryWindow.xib */; };
+		911111F80E594F3F00BF76B4 /* PBRepositoryDocumentController.m in Sources */ = {isa = PBXBuildFile; fileRef = 911111F70E594F3F00BF76B4 /* PBRepositoryDocumentController.m */; };
 		F50FE0E30E07BE9600854FCD /* PBGitRevisionCell.m in Sources */ = {isa = PBXBuildFile; fileRef = F50FE0E20E07BE9600854FCD /* PBGitRevisionCell.m */; };
 		F513085B0E0740F2000C8BCD /* PBQLOutlineView.m in Sources */ = {isa = PBXBuildFile; fileRef = F513085A0E0740F2000C8BCD /* PBQLOutlineView.m */; };
 		F561727F0E056A11001DCD79 /* diff_style.css in Resources */ = {isa = PBXBuildFile; fileRef = F561727C0E056A11001DCD79 /* diff_style.css */; };
@@ -49,6 +50,8 @@
 		8D1107310486CEB800E47090 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist; path = Info.plist; sourceTree = "<group>"; };
 		8D1107320486CEB800E47090 /* GitX.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = GitX.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		911111E10E58BD5A00BF76B4 /* English */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = English; path = English.lproj/RepositoryWindow.xib; sourceTree = "<group>"; };
+		911111F60E594F3F00BF76B4 /* PBRepositoryDocumentController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBRepositoryDocumentController.h; sourceTree = "<group>"; };
+		911111F70E594F3F00BF76B4 /* PBRepositoryDocumentController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBRepositoryDocumentController.m; sourceTree = "<group>"; };
 		F50FE0E10E07BE9600854FCD /* PBGitRevisionCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBGitRevisionCell.h; sourceTree = "<group>"; };
 		F50FE0E20E07BE9600854FCD /* PBGitRevisionCell.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = PBGitRevisionCell.m; sourceTree = "<group>"; };
 		F51308590E0740F2000C8BCD /* PBQLOutlineView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PBQLOutlineView.h; sourceTree = "<group>"; };
@@ -209,6 +212,8 @@
 				77C8280C06725ACE000B614F /* ApplicationController.m */,
 				F57CC43F0E05E496000472E2 /* PBDetailController.h */,
 				F57CC4400E05E496000472E2 /* PBDetailController.m */,
+				911111F60E594F3F00BF76B4 /* PBRepositoryDocumentController.h */,
+				911111F70E594F3F00BF76B4 /* PBRepositoryDocumentController.m */,
 			);
 			name = Controllers;
 			sourceTree = "<group>";
@@ -321,6 +326,7 @@
 				F5DFFA6C0E075D8800617813 /* PBEasyFS.m in Sources */,
 				F50FE0E30E07BE9600854FCD /* PBGitRevisionCell.m in Sources */,
 				F5FF4E180E0829C20006317A /* PBGitRevList.m in Sources */,
+				911111F80E594F3F00BF76B4 /* PBRepositoryDocumentController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

PBGitRepository.h

@@ -9,6 +9,8 @@
 #import <Cocoa/Cocoa.h>
 #import "PBGitRevList.h"
 
+extern NSString* PBGitRepositoryErrorDomain;
+
 @interface PBGitRepository : NSDocument {
 	NSString* path;
 	PBGitRevList* revisionList;

PBGitRepository.m

@@ -8,10 +8,13 @@
 
 #import "PBGitRepository.h"
 #import "PBGitCommit.h"
+#import "PBDetailController.h"
 
 #import "NSFileHandleExt.h"
 #import "PBEasyPipe.h"
 
+NSString* PBGitRepositoryErrorDomain = @"GitXErrorDomain";
+
 @implementation PBGitRepository
 
 @synthesize path, revisionList;
@@ -43,9 +46,63 @@ static NSString* gitPath;
 	NSLog(@"Could not find a git binary!");
 }
 
+- (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError
+{
+	if (outError) {
+		*outError = [NSError errorWithDomain:PBGitRepositoryErrorDomain
+                                      code:0
+                                  userInfo:[NSDictionary dictionaryWithObject:@"Reading files is not supported." forKey:NSLocalizedFailureReasonErrorKey]];
+	}
+	return NO;
+}
+
+- (BOOL)readFromFileWrapper:(NSFileWrapper *)fileWrapper ofType:(NSString *)typeName error:(NSError **)outError
+{
+	self.path = nil;
+
+	if (![fileWrapper isDirectory]) {
+		if (outError) {
+			NSDictionary* userInfo = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Reading files is not supported.", [fileWrapper filename]]
+                                                              forKey:NSLocalizedRecoverySuggestionErrorKey];
+			*outError = [NSError errorWithDomain:PBGitRepositoryErrorDomain code:0 userInfo:userInfo];
+		}
+	} else {
+		NSString* repositoryPath = [[self fileURL] path];
+
+		if ([repositoryPath hasSuffix:@".git"]) {
+			self.path = repositoryPath;
+		} else {
+			// Use rev-parse to find the .git dir for the repository being opened
+			NSString* newPath = [PBEasyPipe outputForCommand:gitPath withArgs:[NSArray arrayWithObjects:@"rev-parse", @"--git-dir", nil] inDir:repositoryPath];
+			if ([newPath isEqualToString:@".git"]) {
+				self.path = [repositoryPath stringByAppendingPathComponent:@".git"];
+			} else if ([newPath length] > 0) {
+				self.path = newPath;
+			} else if (outError) {
+				NSDictionary* userInfo = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"%@ does not appear to be a git repository.", [fileWrapper filename]]
+                                                                 forKey:NSLocalizedRecoverySuggestionErrorKey];
+				*outError = [NSError errorWithDomain:PBGitRepositoryErrorDomain code:0 userInfo:userInfo];
+			}
+		}
+
+		if (self.path) {
+			revisionList = [[PBGitRevList alloc] initWithRepository:self andRevListParameters:[NSArray array]];
+		}
+	}
+
+	return self.path != nil;
+}
+
+// Overridden to create our custom window controller
+- (void)makeWindowControllers
+{
+	PBDetailController* controller = [[PBDetailController alloc] initWithRepository:self];
+	[self addWindowController:controller];
+	[controller release];
+}
+
 + (PBGitRepository*) repositoryWithPath:(NSString*) path
 {
-
 	PBGitRepository* repo = [[PBGitRepository alloc] initWithPath: path];
 	return repo;
 }

PBRepositoryDocumentController.h

@@ -0,0 +1,17 @@
+//
+//  PBRepositoryDocumentController.h
+//  GitX
+//
+//  Created by Ciarán Walsh on 15/08/2008.
+//  Copyright 2008 __MyCompanyName__. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+
+@interface PBRepositoryDocumentController : NSDocumentController
+{
+
+}
+
+@end

PBRepositoryDocumentController.m

@@ -0,0 +1,21 @@
+//
+//  PBRepositoryDocumentController.mm
+//  GitX
+//
+//  Created by Ciarán Walsh on 15/08/2008.
+//  Copyright 2008 __MyCompanyName__. All rights reserved.
+//
+
+#import "PBRepositoryDocumentController.h"
+
+
+@implementation PBRepositoryDocumentController
+// This method is overridden to configure the open panel to only allow
+// selection of directories
+- (NSInteger)runModalOpenPanel:(NSOpenPanel *)openPanel forTypes:(NSArray *)extensions
+{
+	[openPanel setCanChooseFiles:NO];
+	[openPanel setCanChooseDirectories:YES];
+	return [openPanel runModalForDirectory:nil file:nil types:nil];
+}
+@end