Finder progress POC

progress.mm

#import <Foundation/Foundation.h>

// clang progress.mm -framework Cocoa -o progress
// ./progress

int main (int argc, const char * argv[])
{    
    NSString *program = [[[NSProcessInfo processInfo] arguments] firstObject];
    NSDictionary* userInfo = @{
        NSProgressFileOperationKindKey : NSProgressFileOperationKindReceiving,
        NSProgressFileURLKey : [NSURL fileURLWithPath:program],
    };

    NSProgress *progress = [[NSProgress alloc] initWithParent:nil userInfo:userInfo];    
    progress.kind = NSProgressKindFile;
    progress.pausable = NO;
    progress.cancellable = YES;
    progress.totalUnitCount = 10;

    [progress publish];

    for (NSUInteger completedUnits = 0; completedUnits < progress.totalUnitCount; ++completedUnits) {
        if ([progress isCancelled]) {
            NSLog(@"Cancelled!");
            break;
        }

        sleep(1);
        
        NSLog(@"Progress...");
        [progress setCompletedUnitCount:(completedUnits + 1)];
    }

    return 0;
}