Current directory handling changes

New processes default to using the user's home directory as the current
directory.  When opening files opened from Finder the current directory
is changed to that of the first file opened.

src/MacVim/MMAppController.m

@@ -161,6 +161,12 @@ + (void)initialize
 
     NSArray *types = [NSArray arrayWithObject:NSStringPboardType];
     [NSApp registerServicesMenuSendTypes:types returnTypes:types];
+
+    // NOTE: Set the current directory to user's home directory, otherwise it
+    // will default to the root directory.  (This matters since new Vim
+    // processes inherit MacVim's environment variables.)
+    [[NSFileManager defaultManager] changeCurrentDirectoryPath:
+            NSHomeDirectory()];
 }
 
 - (id)init

src/MacVim/MMBackend.m

@@ -2267,6 +2267,13 @@ - (void)handleOpenWithArguments:(NSDictionary *)args
     BOOL openFiles = ![[args objectForKey:@"dontOpen"] boolValue];
     int layout = [[args objectForKey:@"layout"] intValue];
 
+    // Change to directory of first file to open, unless editing remotely.
+    if (openFiles && numFiles > 0 && ![args objectForKey:@"remoteID"]) {
+        char_u *s = [[filenames objectAtIndex:0] vimStringSave];
+        vim_chdirfile(s);
+        vim_free(s);
+    }
+
     if (starting > 0) {
         // When Vim is starting we simply add the files to be opened to the
         // global arglist and Vim will take care of opening them for us.

src/main.c

@@ -464,6 +464,7 @@ main
     {
 	params.want_full_screen = FALSE;
 
+# ifndef FEAT_GUI_MACVIM
 	/* Avoid always using "/" as the current directory.  Note that when
 	 * started from Finder the arglist will be filled later in
 	 * HandleODocAE() and "fname" will be NULL. */
@@ -478,6 +479,7 @@ main
 		vim_chdir(NameBuff);
 	    }
 	}
+# endif
     }
 #endif
 
@@ -1916,7 +1918,7 @@ command_line_scan(parmp)
 		break;
 
 	    case 'p':		/* "-p[N]" open N tab pages */
-#ifdef TARGET_API_MAC_OSX
+#if defined(TARGET_API_MAC_OSX) && !defined(FEAT_GUI_MACVIM)
 		/* For some reason on MacOS X, an argument like:
 		   -psn_0_10223617 is passed in when invoke from Finder
 		   or with the 'open' command */