Prettier config JS file changes ignored

[MeanderingProgrammer]

After the initial load in a workspace, changing a JavaScript prettier config has no impact and requires restarting prettierd.

After looking through the code, I believe this is due to how Node caches imports and how prettier handles the resolveConfig method call.

Even though useCache: false should result in the configuration being reloaded looking through the prettier implementation when a JS config is reloaded it makes this method call: https://github.com/prettier/prettier/blob/main/src/config/prettier-config/loaders.js#L20

async function loadJs(file) {
  const module = await import(pathToFileURL(file).href);
  return module.default;
}

Since the file path is the same on reload the Node import caching behavior will return the same configuration as before.

Though I am not very familiar with import caching, that is my understanding from reading: https://nodejs.org/api/modules.html#caching.

• Related issue: Invalidate cache when using import nodejs/node#49442

This may be something that needs to be fixed on prettier's side, at least if my understanding is correct. I've created an issue there as well: prettier/prettier#16234.

I am unsure if there is something that can be done on this side. Using non JS configurations works as expected since files are re-read and re-parsed by prettier.

May just be something to be aware and mark as a note.

[MeanderingProgrammer]

As a patch in Neovim I added the following auto command to restart prettierd on config changes:

vim.api.nvim_create_autocmd({ 'BufWritePost' }, {
    group = vim.api.nvim_create_augroup('RestartPrettierd', { clear = true }),
    pattern = '*prettier*',
    callback = function()
        vim.fn.system('prettierd restart')
    end,
})

[thekaganugur]

As a patch in Neovim I added the following auto command to restart prettierd on config changes:

vim.api.nvim_create_autocmd({ 'BufWritePost' }, {
    group = vim.api.nvim_create_augroup('RestartPrettierd', { clear = true }),
    pattern = '*prettier*',
    callback = function()
        vim.fn.system('prettierd restart')
    end,
})

This is a really cool solution. Thanks! :)