Command-line app that tells a bitbar chunkwm plugin to refresh when the user changes spaces

observer.m

#import <Cocoa/Cocoa.h>

@interface SpaceChangeNotifier : NSObject
- (void) registerNotifier;
- (void)spaceChanged:(NSNotification *)aNotification;
@end

@implementation SpaceChangeNotifier

- (id) init
{
  self = [super init];
  return self;
}

- (void) registerNotifier {
  NSNotificationCenter *nc = [[NSWorkspace sharedWorkspace] notificationCenter];

  [nc addObserver:self selector:@selector(spaceChanged:)
    name:NSWorkspaceActiveSpaceDidChangeNotification
    object:[NSWorkspace sharedWorkspace]];
}

- (void)spaceChanged:(NSNotification *)aNotification {
  system("open -g 'bitbar://refreshPlugin?name=chunkwm.*?.fish'");
}

@end

int main(int argc, char *argv[]) {
  [NSApplication sharedApplication];
  SpaceChangeNotifier *n = [SpaceChangeNotifier new];
  [n registerNotifier];
  [NSApp run];
  return 0;
}