I developed jyt, a converter between JSON, YAML, and TOML written in Rust.
ken-matsui
/
jyt
A tridirectional converter between Json, Yaml, and Toml, which supports both native and WebAssembly
jyt 
A tridirectional converter between Json, Yaml, and Toml which supports both native and WebAssembly
Installation
You can install this using the cargo install command:
$ cargo install jyt
WebAssembly
This application also provides a wasm package
You can install it using wapm by the following command:
$ wapm install ken-matsui/jyt
Usage
%%{init: {"flowchart" : { "curve" : "linear" } } }%%
graph LR;
JSON --> |$ jyt jy|YAML
JSON --> |$ jyt jt|TOML
YAML --> |$ jyt yt|TOML
YAML --> |$ jyt yj|JSON
TOML --> |$ jyt ty|YAML
TOML --> |$ jyt tj|JSON
$ jyt --help
jyt 0.1.0
Ken Matsui <26405363+ken-matsui@users.noreply.github.com>
A tridirectional converter between Json, Yaml, and Toml
USAGE:
jyt <SUBCOMMAND>
OPTIONS:
-h, --help Print help information
-V, --version Print version information
SUBCOMMANDS:
help Print this message or the help of the given subcommand(s)
json-to-toml Convert Json to Toml (also as …I would introduce what jyt can do.
Introduction
Many tools support many extensions of configuration files; for example, ESLint supports JavaScript, YAML, and JSON. I personally use YAML for ESLint config files rather than other formats. However, blog posts often provide a config file as JSON because it is the most popular, and YAML is not - I am a minority.
It was a waste of time to convert it to YAML manually, so I developed jyt to convert the config file posted on blog posts to YAML.
jyt originated from the respective initials of JSON, YAML, and TOML.
Features
- Written in Rust
- Supports both native and WebAssembly
- Preserves order
Installation
You can install jyt with Cargo so that it is published on crates.io:
$ cargo install jyt
jyt also supports WebAssembly and can be installed through wapm.io:
$ wapm install ken-matsui/jyt
Usage
You can simply execute jyt as the following help.
$ jyt --help
jyt 0.1.0
Ken Matsui <26405363+ken-matsui@users.noreply.github.com>
A tridirectional converter between Json, Yaml, and Toml
USAGE:
jyt <SUBCOMMAND>
OPTIONS:
-h, --help Print help information
-V, --version Print version information
SUBCOMMANDS:
help Print this message or the help of the given subcommand(s)
json-to-toml Convert Json to Toml (also as `json2toml`, `j2t`, and `jt`)
json-to-yaml Convert Json to Yaml (also as `json2yaml`, `j2y`, and `jy`)
toml-to-json Convert Toml to Json (also as `toml2json`, `t2j`, and `tj`)
toml-to-yaml Convert Toml to Yaml (also as `toml2yaml`, `t2y`, and `ty`)
yaml-to-json Convert Yaml to Json (also as `yaml2json`, `y2j`, and `yj`)
yaml-to-toml Convert Yaml to Toml (also as `yaml2toml`, `y2t`, and `yt`)
As diagram: 
Examples
Since jyt can be used with pipes, you can directly pass the output of the cat command.
$ cat ./examples/example.json | jyt json-to-yaml
---
title: TOML Example
owner:
name: Tom Preston-Werner
database:
server: 192.168.1.1
ports:
- 8000
- 8001
- 8002
connection_max: 5000
enabled: true
The preserving order feature can correctly execute the following command.
The example indicates that pre-converted TOML file and converting TOML -> YAML -> JSON -> TOML match.
$ test "$(cat ./examples/example.toml)" = "$(cat ./examples/example.toml | jyt ty | jyt yj | jyt jt)"
$ echo $?
0
The above example will fail if your file includes data that requires special operation in a conversion, such as the
datetimetype of TOML.
For more examples, go to the examples page of README.md.
https://github.com/ken-matsui/jyt#examples
Converting ESLint config
Let's pull an example config from the official document.
https://eslint.org/docs/user-guide/configuring/configuration-files
.eslintrc.json
{
"root": true,
"extends": [
"eslint:recommended",
"plugin:@typescript-eslint/recommended"
],
"parser": "@typescript-eslint/parser",
"parserOptions": { "project": ["./tsconfig.json"] },
"plugins": [
"@typescript-eslint"
],
"rules": {
"@typescript-eslint/strict-boolean-expressions": [
2,
{
"allowString" : false,
"allowNumber" : false
}
]
},
"ignorePatterns": ["src/**/*.test.ts", "src/frontend/generated/*"]
}
Convert the config to YAML by the following command:
cat .eslintrc.json | jyt jy > .eslintrc.yaml
You will receive the same output below:
.eslintrc.yaml
---
root: true
extends:
- "eslint:recommended"
- "plugin:@typescript-eslint/recommended"
parser: "@typescript-eslint/parser"
parserOptions:
project:
- "./tsconfig.json"
plugins:
- "@typescript-eslint"
rules:
"@typescript-eslint/strict-boolean-expressions":
- 2
- allowString: false
allowNumber: false
ignorePatterns:
- src/**/*.test.ts
- src/frontend/generated/*
WebAssembly support
As mentioned before, you can try jyt on the web because it supports WebAssembly.
https://wapm.io/ken-matsui/jyt
Click on Open in Shell to run jyt from the above site.
Conclusion
I think jyt would be helpful as a lightweight interconversion CLI.
I hope this article and jyt help you.
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