append-to-file.nu

#!/usr/local/bin/nush

(function append-to-file (filename text)
    (unless ((NSFileManager defaultManager) fileExistsAtPath:filename)
        ((NSFileManager defaultManager) createFileAtPath:filename contents:nil attributes:nil))
    (set handle (NSFileHandle fileHandleForWritingAtPath:filename))
    (handle seekToEndOfFile)
    (handle writeData:((+ text "\n") dataUsingEncoding:NSUTF8StringEncoding))
    (handle closeFile))

;; example
(append-to-file "mylogfile" (+ "it is now " ((NSDate date) description)))