Implement refine imports

[rayshih]

What is this?

A plugin which can refine the imports to use the underlying modules instead of the aggregated one.

For example, assuming there is a module A what it does is only importing and immediately exporting module B and module C, and there is a Main module importing A for a value which is defined in module B. This plugin can provide a click to change from import A to import B.

That is, from

module Main where

import A

to

module Main where

import B (b1)

Why?

One reason of long building time is because the unnecessary dependencies imported. In above example, module C is an unnecessary dependency.

This provides a fast way to cut down the size of dependencies.

[isovector]

🆒

[pepeiborra]

stamped!

[pepeiborra]

To run in CI the test suite needs to be added to https://github.com/haskell/haskell-language-server/blob/master/.github/workflows/test.yml

[pepeiborra]

Let's add the test suite to CI before merging

[jneira]

nix jobs has failed with

error: attribute 'run' missing, at /Users/runner/work/haskell-language-server/haskell-language-server/nix/default.nix:83:24
(use '--show-trace' to show detailed location information)
Error: Process completed with exit code 1.

rerunning the jobs just in case

[pepeiborra]

nix jobs has failed with

error: attribute 'run' missing, at /Users/runner/work/haskell-language-server/haskell-language-server/nix/default.nix:83:24
(use '--show-trace' to show detailed location information)
Error: Process completed with exit code 1.

rerunning the jobs just in case

The Nix commit hooks were not pinned correctly and now they have broken. @Ailrun could you take a look?

[Ailrun]

Sure, let me check that tomorrow.

[rayshih]

hooray!