# ts-json-schema-generator

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Extended version of [https://github.com/xiag-ag/typescript-to-json-schema](https://github.com/xiag-ag/typescript-to-json-schema).

Inspired by [`YousefED/typescript-json-schema`](https://github.com/YousefED/typescript-json-schema). Here's the differences list:

* this implementation does not use `typeChecker.getTypeAtLocation()` (so probably it keeps correct type aliases)
* processing AST and formatting JSON schema have been split into two independent steps
* not exported types, interfaces, enums are not exposed in the `definitions` section in the JSON schema

## Contributors

This project is made possible by a [community of contributors](https://github.com/vega/ts-json-schema-generator/graphs/contributors). We welcome contributions of any kind (issues, code, documentation, examples, tests,...). Please read our [code of conduct](https://github.com/vega/vega/blob/master/CODE_OF_CONDUCT.md).

## Usage

```bash
npm install --save ts-json-schema-generator
./node_modules/.bin/ts-json-schema-generator --path 'my/project/**.*.ts' --type 'My.Type.Full.Name'
```

## Options

```
-t, --type 'My.Type.Full.Name'
    The type the generated schema will represent. If omitted, the generated schema will contain all
    types found in the files matching path. The same is true if '*' is specified.

-e, --expose <all|none|export>
    all: Create shared $ref definitions for all types.
    none: Do not create shared $ref definitions.
    export (default): Create shared $ref definitions only for exported types.

-f, --tsconfig 'my/project/tsconfig.json'
    Use a custom tsconfig file for processing typescript (see https://www.typescriptlang.org/docs/handbook/tsconfig-json.html) instead of the default:
    {
        "compilerOptions": {
            "noEmit": true,
            "emitDecoratorMetadata": true,
            "experimentalDecorators": true,
            "target": "ES5",
            "module": "CommonJS",
            "strictNullChecks": false,
        }
    }

-r, --no-top-ref
    Do not create a top-level $ref definition.

-j, --jsDoc <extended|none|basic>
    none: Do not use JsDoc annotations.
    basic: Read JsDoc annotations to provide schema properties.
    extended (default): Also read @nullable, and @asType annotations.

-u, --unstable
    Do not sort properties.

-s, --strict-tuples
    Do not allow additional items on tuples.

-c, --skip-type-check
    Skip type checks for better performance.

-k, --validationKeywords
    Provide additional validation keywords to include.
```


## Current state

* `interface` types
* `enum` types
* `union`, `tuple`, `type[]` types
* `string`, `boolean`, `number` types
* `"value"`, `123`, `true`, `false`, `null`, `undefined` literals
* type aliases
* generics
* `typeof`
* `keyof`
* conditional types

## Debug

`npm run debug -- --path 'test/valid-data/type-mapped-array/*.ts' --type 'MyObject'`

And connect via the debugger protocol.

[AST Explorer](https://astexplorer.net/) is amazing for developers of this tool!