Getting the CocoaPods version with DSUnixTask - output is empty.

gistfile1.m

- (void)checkCocoaPodsVersion
{
    DSUnixShellTask *task = [DSUnixTaskSubProcessManager shellTask];
    [[DSUnixTaskSubProcessManager sharedManager] setLoggingEnabled:YES];
    [task setCommand:@"pod"];
    [task setArguments:@[@"--version"]];
    
    [task setStandardErrorHandler:^(DSUnixTask *task, NSString *error)
     {
         NSLog(@"DSUnixTask error: %@", error);
     }];
    
    [task setStandardOutputHandler:^(DSUnixTask *task, NSString *output)
    {
        NSLog(@"output\n%@\nfor task:%@", output, task);
    }];
    [task setTerminationHandler:^(DSUnixTask *task)
    {
        NSLog(@"termination handler for task %@", task);
        NSLog(@"output: %@", task.standardOutput);
        NSLog(@"output length: %lu", task.standardOutput.length);
    }];
    [task setFailureHandler:^(DSUnixTask *task)
    {
        NSLog(@"failure handler for task %@, error: %@", task, task.standardError);
    }];
    
    [task launch];
}

Console.app says:

13/11/13 22:30:07,059 Xcode[45428]: Launching Task with launchPath:/bin/bash arguments:'-i' '-c' 'pod --version'
13/11/13 22:30:07,060 Xcode[45428]: ✅ [pod:45432] Did launch (Local)
13/11/13 22:30:07,219 Xcode[45428]: [pod:45432] * Did terminate: 45432
13/11/13 22:30:07,550 Xcode[45428]: termination handler for task Task with launchPath:/bin/bash arguments:'-i' '-c' 'pod --version'
13/11/13 22:30:07,550 Xcode[45428]: output: 
13/11/13 22:30:07,550 Xcode[45428]: output length: 0

Really strange, I can't see anything wrong with it. Have you checked how CocoaPods-objc does it? It is a bit outdated but the handshake should still work.

I tried it with a NSTask – also no output. So it's not a problem with DSUnixTask.

In CocoaPods-obc you used 'pod ipc repl' for communication. This prints the version as the first output so I have at least one other option. But at first I'd like to know what's wrong with the version output.

So pod ipc repl works?

Yes, thanks for pointing this out! This is now my temporarily solution.
I asked @alloy but he had no advice at the moment.