Configuring tombi with stevearc/conform.nvim in neovim

[PMassicotte]

First, thank you for this nice piece of work.

Kinda a long shot, but could not find more information about this specific issue I am facing.

I am trying to configure tombi with neovim using conform.nvim.

I have this in my config:

formatters_by_ft = {
    toml = { "tombi" },
}

This is working for formatting. The issue is it does not produce the same result as I have with running the cli as:

tombi format Cargo.toml

For example, keys are not sorted, only the indentation is formatted.

Any idea?

[PMassicotte]

I have found that I could do this

formatters_by_ft = {
    toml = {
        command = "tombi",
        args = { "format", "$FILENAME" },
    },
}

Would you accept a PR providing these instructions?

[PMassicotte]

@PMassicotte have you tried cat Cargo.toml | tombi format - to see if you get the same results on the command line?

Here's the tombi config for conform for reference: https://github.com/stevearc/conform.nvim/blob/master/lua/conform/formatters/tombi.lua

It looks like that using stdin does not detect that we are using a Cargo.toml file and thus does not apply sorting (ie. zip and tokio are unchanged):

❯ cat Cargo.toml | tombi format -
[package]
name = "chat"
version = "0.1.0"
edition = "2021"

[dependencies]
zip = "4.2.0"
tokio = { version = "1.40.0", features = ["full"] }
1 file did not need formatting

If I use it with

❯ tombi format Cargo.toml
1 file formatted

It is formatting is correctly:

[package]
name = "chat"
version = "0.1.0"
edition = "2021"

[dependencies]
tokio = { version = "1.40.0", features = ["full"] }
zip = "4.2.0"

[ya7010]

@PMassicotte

Ah, this is because tombi selects the schema from the file name pattern.

As a workaround,

1. Give the file name to tombi with tombi format $FILENAME.
2. Add schema directive comment to Cargo.toml(Add #:schema tombi://json.schemastore.org/cargo.json).

[PMassicotte]

Yes, I am using

formatters_by_ft = {
    toml = {
        command = "tombi",
        args = { "format", "$FILENAME" },
    },
}

And it works fine.

[polyzen]

Seems formatting from stdin works as expected now. Disregard

[polyzen]

stevearc/conform.nvim#763

[ya7010]

tombi format Cargo.toml already works.

What features are you looking for?

The reasons for the difference in format are generally as follows.

• Different formatters are working (check if magic trailing comma works).
• The command is being executed with a different current_dir (please investigate the log with tombi format -vv $filename. 📝 tombi v0.4.41 or higher is required.).

📝 When tombi is executed in a different directory, the logic for searching for tombi.toml changes.

[PMassicotte]

Closing it since we have found workaround. For those in the future, there are two options:

1. Configure conform as this:

formatters_by_ft = {
    toml = {
        command = "tombi",
        args = { "format", "$FILENAME" },
    },
}

2. Specify the schema in the Cargo.toml file directly.

#:schema tombi://json.schemastore.org/cargo.json

[package]
name = "mycli"
version = "0.1.0"
edition = "2024"

[dependencies]