Byline simplifies writing interactive command-line applications by
building upon ansi-terminal
and haskeline
. This makes it
possible to print messages and prompts that include terminal escape
sequences (such as setting text colors) that are automatically
disabled when standard input is a file. It also means that Byline
works on both POSIX-compatible systems and on Windows.
The primary features of Byline include printing messages, prompting
for input, and generating custom menus. It was inspired by the
highline
Ruby library and the terminal
library by Craig Roche.
Example
example :: MonadByline m => m Text
example = do
sayLn ("Hey, I like " <> ("Haskell" <> fg magenta) <> "!")
let question =
"What's "
<> ("your" <> bold)
<> " favorite "
<> ("language" <> fg green <> underline)
<> "? "
askLn question (Just "Haskell")