Elm-pair

Elm-pair helps you write Elm code. You tell Elm-pair about the change you want to make and it will do the actual work. It's a bit like using an IDE, except you don't need to learn any keyboard shortcuts.

You talk to Elm-pair by making a change in your code. If Elm-pair understands your intent then it will follow up with its own change.

Elm-pair is free for non-commercial use. If you'd like to use Elm-pair for commercial projects you need to buy a license. Find out more here.

Renaming variables, types, and constructors

Rename a variable and Elm-pair will propagate the new name wherever the variable is used. Elm-pair will propagate type and constructor names in the same way.

Changing import statements

As you change an import statement alias or exposing list, Elm-pair will update your code to keep it compiling.

Use your own editor

Elm-pair integrates with your editor of choice. Currently Neovim is supported and Visual Studio Code support is on the way, with support for additional editors planned. Elm-pair runs on MacOS and Linux.

Get it

You can find installation instructions at https://elm-pair.com/install.

Acknowledgements

This project is made possible by a couple of others.

• tree-sitter is a library for fast code parsing. It allows Elm-pair to listen to every key stroke and figure out programmer intent quickly and efficiently.
• tree-sitter-elm is an extension for tree-sitter that adds support for the Elm programming language.
• ropey provides the 'rope' datastructure Elm-pair uses to store local copies of source code.
• notify makes it easy for Elm-pair to subscribe to changes in the file system, so it can keep up with what's happening in your Elm projects.
• differential-dataflow provides a way to do incremental computation, allowing Elm-pair to do the bare minimum of work when a file changes.