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Elm Dev

Elm Dev is a version of the Elm compiler that is made to support editing tools.

Not to be confused with Elm itself which lives here: https://elm-lang.org/

This package is for toolmakers, so if you're just starting out using Elm, you likely don't need this tool directly.

Install via npm install -g elm-dev if you want to play with it. It's currently experimental, but will likely be stable soon.

Currently this is a command line tool with the following commands that print or output JSON.

• warnings - List missing type signatures and unused values.
• entrypoints - Detect what .elm files are the potential roots of a project. This will also report any ports relevant to a specific entrypoint as well as the type signatures of those ports.
• docs - Generate docs.json for any package, or any local .elm file.
• imports - Given a list of modules, report all files and packages that they collectively depends on. This is useful for
• usage - Given a module, return all usages of that module in a given project.
• explain - Given a fully qualified type name, provide it's full definition.

Each command may instead report compilation errors if the file or project fails to compile.

Roadmap

The above functionality is a first pass on what would be useful for elm-dev to report and has been published to allow downstream projects to try stuff out.

In the medium term, the intention is to support the language-server protocol and to adjust functionaltiy based on downstream projects.