New: xcc --reset resets the Xcode support before opening the project.

This will help in cases where the project is way out of sync and crashes XCC.

Tools/XcodeCapp/XcodeCapp/XcodeCapp.m

@@ -26,6 +26,7 @@
 #import "Notifications.h"
 #import "ProcessSourceOperation.h"
 #import "UserDefaults.h"
+#import "XcodeProjectCloser.h"
 
 
 #if MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_6
@@ -50,23 +51,6 @@ enum XCCLineSpecifier {
 };
 typedef enum XCCLineSpecifier XCCLineSpecifier;
 
-// Used to close the Xcode project if it is open.
-static const char *XCCCloseProjectScript =
-    "tell application \"Xcode\"\n"
-        "set docs to (document of every window)\n"
-        "repeat with doc in docs\n"
-            "if class of doc is workspace document then\n"
-                "set docURL to file of doc\n"
-                "set docPath to docURL as text\n"
-                "set docPath to POSIX path of docPath\n"
-                "if docPath begins with \"%@\" then\n"
-                    "close doc\n"
-                    "return\n"
-                "end if\n"
-            "end if\n"
-        "end repeat\n"
-    "end tell";
-
 // Where we put the generated Cocoa class files
 static NSString * const XCCSupportFolderName = @".XcodeSupport";
 
@@ -109,10 +93,7 @@ static NSArray *XCCDefaultIgnoredPathPredicates = nil;
 
 @property NSFileManager *fm;
 
-// Full path to the <project>.xcodeproj
-@property NSString *xcodeProjectPath;
-
-// An NSString version of XCCCloseProjectScript
+// An NSString version of XCCCloseXcodeProjectScript
 @property NSString *closeXcodeProjectScriptSource;
 
 // Full path to .xcodecapp-ignore
@@ -199,7 +180,6 @@ void fsevents_callback(ConstFSEventStreamRef streamRef,
         self.fm = [NSFileManager defaultManager];
         self.ignoredPathPredicates = [NSMutableArray new];
         self.parserPath = [[NSBundle mainBundle].sharedSupportPath stringByAppendingPathComponent:@"parser.j"];
-        self.closeXcodeProjectScriptSource = [NSString stringWithUTF8String:XCCCloseProjectScript];
         self.appStartedTimestamp = [NSDate date];
         self.projectPathsForSourcePaths = [NSMutableDictionary new];
         self.xcodecappIgnorePath = @"";
@@ -287,6 +267,13 @@ void fsevents_callback(ConstFSEventStreamRef streamRef,
     return _pathModificationDates;
 }
 
+- (BOOL)xcodeProjectCanBeOpened
+{
+    return (self.xcodeProjectPath &&
+            !self.isProcessing &&
+            [self.fm fileExistsAtPath:self.xcodeProjectPath]);
+}
+
 #pragma mark - Project Management
 
 - (void)loadProjectAtPath:(NSString *)path
@@ -445,14 +432,21 @@ void fsevents_callback(ConstFSEventStreamRef streamRef,
     }
 }
 
-- (IBAction)synchronizeProject:(id)aSender
+- (void)resetProject
 {
     NSString *projectPath = self.projectPath;
-    
+
     [self stop];
     [self removeSupportFilesAtPath:projectPath];
     [self removeAllCibsAtPath:[projectPath stringByAppendingPathComponent:@"Resources"]];
-    [self loadProjectAtPath:projectPath];
+
+    self.projectPath = projectPath;
+}
+
+- (IBAction)synchronizeProject:(id)aSender
+{
+    [self resetProject];
+    [self loadProjectAtPath:self.projectPath];
 }
 
 - (void)removeAllCibsAtPath:(NSString *)path
@@ -468,21 +462,12 @@ void fsevents_callback(ConstFSEventStreamRef streamRef,
 
 - (void)removeSupportFilesAtPath:(NSString *)projectPath
 {
-    [self closeXcodeProjectForProject:projectPath];
+    [XcodeProjectCloser closeXcodeProjectForProject:projectPath];
 
     [self.fm removeItemAtPath:self.xcodeProjectPath error:nil];
     [self.fm removeItemAtPath:self.supportPath error:nil];
 }
 
-- (void)closeXcodeProjectForProject:(NSString *)projectPath
-{
-    NSString *source = [NSString stringWithFormat:self.closeXcodeProjectScriptSource, projectPath];
-    NSAppleScript *script = [[NSAppleScript alloc] initWithSource:source];
-
-    NSAppleEventDescriptor *descriptor;
-    descriptor = [script executeAndReturnError:nil];
-}
-
 - (void)stop
 {
     // Increment the projectId to ensure remaining notifications in the queue for the current project are ignored