System.Chatty.Commands

Provides in-haskell implementations for some standard functions

Documentation

cat :: (MonadScanner m, MonadPrinter m, MonadIO m, Functor m, MonadFinalizer m) => [String] -> m ()

Like cat on the command line. Accepts a list of filenames. Simple pass-through, if none are provided.

tac :: (MonadFinalizer m, MonadScanner m, MonadPrinter m, MonadIO m, Functor m) => [String] -> m ()

Like cat, but reverses the line order.

tee :: (MonadScanner m, MonadPrinter m, MonadIO m, Functor m) => String -> m ()

Pass-through, simultanously writing all input to a given file.

echo :: (MonadPrinter m, MonadExpand m) => String => m ()

Prints the given string, after expanding it.

data WcMode

Mode for wc.

Constructors

CountChars

CountLines

CountWords

wc :: (MonadScanner m, MonadPrinter m, MonadIO m, Functor m) => WcMode -> m ()

Count characters, lines or words of the input.

cd :: MonadIO m => String -> m ()

Change to given directory.

pwd :: (MonadIO m, MonadPrinter m) => m ()

Print current working directory.

ls :: (MonadIO m, MonadPrinter m) => [String] -> m ()

List directory contents of the given directories (current one, if empty list).

head :: (MonadScanner m, MonadPrinter m, MonadIO m, Functor m) => Int -> m ()

Filters only the first n lines of the input.

tail :: (MonadScanner m, MonadPrinter m, MonadIO m, Functor m) => Int -> m ()

FIlters only the last n lines of the input.