ema

Ema is a next-gen Haskell library for building jamstack-style static sites, with fast hot reload. See ema.srid.ca for documentation.

The simplest Ema app looks like this:

main :: IO ()
main = do
  let name :: Text = "Ema"
  runEmaPure $
    encodeUtf8 $ "<b>Hello</b>, from " <> name

Hacking

Run bin/run (or Ctrl+Shift+B in VSCode). This runs the documentation example; modify ./.ghcid to run a different example, such as the clock example - which updates every second, demonstrating hot reload.

TODO

• MVP
• Implement hot reload, and ditch browser-sync
  • server to client refresh
  • client to server reconnect (on ghcid reload, or accidental client disconnect)
    • or, investigate https://hackage.haskell.org/package/ghci-websockets
• Multi-websocket-client support
• Static site generation mode
• add common examples,
  • filesystem watcher
  • docs site for self (w/ breadcrumbs and possibly even search)

pre-announce,

• CLI UX
  • opts
  • logging
    • Expose it to apps (inc/ helpers) in a simple way
• deal with errors
• How to serve non-generated files (css, img, etc.)
• Publish Data.LVar to Hackage
• documentation (guide)
  • Avoid tailwind CDN in docs (use twind or windicss) for better lighthouse score