Cli: TOML AST parser

[phae]

Needed for writing to .toml files in a way to preserve comments. (hacky regex *might work to start)

[bcomnes]

I would love to delegate this to a library if we can find one that supports parsing and serializing comments.

[DavidWells]

If you can find one. That would be legit =)

I couldn't find anything out there last time I checked

[DavidWells]

No AST parser exists in the wild. We will likely have to bake our own.

Here is a md AST parser that might help get the ball rolling https://github.com/leebyron/spec-md/tree/7c4f3ca2012e0b8d07e79ff370b9230f9323b8be/src

Maybe these toml pegjs refs will help:

• http://code.ixiye.com/ixiye/ixiye-docs/blob/da45a00535ad8cd72efce263c815169031a2852a/node_modules/toml/package.json#L93
• https://github.com/naoina/toml/blob/master/parse.peg
• https://github.com/jakwings/toml-j0.4

Why?

We need an AST parser to programatically write to toml files for improve DX

[jschatz1]

@phae @DavidWells I've been learning Rust, which can interface into NodeJS.
Rust has a fantastic project for preserving toml while editing. It's used in a project for cargo.
https://crates.io/crates/toml_edit

I could give it a swing to take that crate and make it compatible with NodeJS.

[DavidWells]

Sounds good to me.

On Fri, Jul 26, 2019 at 4:03 AM jschatz1 [e-mail] wrote:

@phae https://github.com/phae @DavidWells
https://github.com/DavidWells I've been learning Rust, which can
interface into NodeJS.
Rust has a fantastic project for preserving toml while editing. It's used
in a project for cargo.
https://crates.io/crates/toml_edit

I could give it a swing to take that crate and make it compatible with
NodeJS.

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[RaeesBhatti]

I recently found @toml-tools/parser which preserves all of the comments and existing structure of the TOML file. After tinkering with it for a while, I think it will be almost perfect for our use-case since it is

• written entirely in JS
• based on top of very popular chevrotain toolkit
• and provides us with AST of TOML file

I recommend using this.