PipeCommands executes the commands received as input by feeding the output of one to the input of the other, exactly like Unix Pipe (|).

SafeJoin performs a filepath.Join of 'parent' and 'subdir' but returns an error if the resulting path points outside of 'parent'.

SaveFileonTempDir creates a temp directory and saves the file data as the filename in that directory.

TellCommandNotToSpawnShell will now spawn a shell.

UserPrompt executes an osascript and returns the pressed button.

VerifyInput will verify an input against a signature A valid signature is indicated by returning a nil error.