Local prettier format on save

[kelbyfaessler]

I'm trying to configure null-ls to run the local prettier to format files on save i.e. the one installed in node_modules. Reading some other discussions, it seems this should work by default?

I'm pulling version c0c19f3 of null-ls.

I confirmed I can run it using npx prettier
When I run :checkhealth, null-ls says the prettier exec isn't found

Any help greatly appreciated

[jose-elias-alvarez]

What about running ./node_modules/.bin/prettier? It should work by default, but it's hard to say anything without more information.

[kelbyfaessler]

That also works.

Is there anything I can do to debug what/where null-ls is doing to find it?

[kelbyfaessler]

The version I mentioned that my config has tagged is after the changes to make it work by default?

[kelbyfaessler]

The version I mentioned that my config has tagged is after the changes to make it work by default?

Tried it with the latest version and same thing. I wonder if it's something in my config?

[kelbyfaessler]

Ok, what ultimately worked was adding svelte to extra_filetypes:

null_ls.setup({
    debug = true,
    sources = {
        formatting.prettier.with({
            extra_filetypes = { "svelte" },
        }),
   },

It's interesting that my local .prettierrc has the following, which I thought would be enough for it to find svelte files:

    "plugins": [
        "prettier-plugin-svelte"
    ],
    "pluginSearchDirs": [
        "."
    ],
    "overrides": [
        {
            "files": "*.svelte",
            "options": {
                "parser": "svelte"
            }
        }
    ]

I did confirm changing the .prettierrc file has an effect on how it formats .svelte files in this local project, just to be sure it was using it.

Here was part of my debugging process in case it's useful to others:

• I tried adding prefer_local = "node_modules/.bin" to the null-ls prettier config to make sure it was attempting to use the local prettier executable
• I used the NullLsInfo neovim command to see if there were any formatting sources attached to files I was opening
• I had the thought to try on some of the plain js files in the repo
• Prettier worked on plain js files so that's how I knew I had to make it run on svelte files.

@jose-elias-alvarez It might be helpful for you in answering these types of questions in the future to have a standard template of baseline info to ask. For example, what is the filetype being formatted that isn't working?

[jose-elias-alvarez]

Glad you figured this out. null-ls isn't aware of your Prettier config and will only run on configured filetypes. In the future I'd recommend opening an issue, since we have a pretty thorough template for those.