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@cats-oss/ts-proto-optimize

Continuous Integration

[EXPERIMENTAL] It's CLI tool for optimize TypeScript protobuf type-definition file.

Optimize the definition of a protobuf that is only used to get type-safe. Compilation using Babel becomes possible.

Features

  • Extract all enum.
    • Remove from namespace and concat names. (use pascal case)
    • Replaces interface with enum.
  • Remove import * as $protobuf from "protobufjs";.
    • Keep the small bundle size.
  • Remove all Long, Nullable, and Optional.
  • Remove all class.
  • Remove all function declaration type aliases.
  • Add export keyword to interface in namespace.

Installation

$ npm i -D @cats-oss/ts-proto-optimize

Usage

# Output to stdout
$ $(npm bin)/ts-proto-optimize path/to/proto.d.ts

# Output to file
$ $(npm bin)/ts-proto-optimize path/to/proto.d.ts --output dist/to/proto.ts

Example

input:

import * as $protobuf from 'protobufjs';

/** Namespace root. */
export namespace root {
  /** Namespace api. */
  namespace api {
    /** Properties of a Foo */
    interface IFoo {
      /** Foo str */
      str?: string | null;

      /** Foo number */
      num?: number | Long | null;
    }

    /** class Enumerate */
    class Foo implements IFoo {
      /**
       * comment
       */
      constructor(properties?: root.api.IFoo);

      /** comment */
      public str: string;

      /** comment */
      public num: number;
    }

    /** Enum enum */
    enum Enum {
      KEY1_SNAKE_CASE = 0,
      KEY2_SNAKE_CASE = 1,
      KEY3_SNAKE_CASE = 2,
    }

    namespace Nest {
      /**
       * Callback as used by {@link ...}.
       * @param error Error, if any
       * @param [response] GetFooResponse
       */
      type GetFooCallback = (
        error: Error | null,
        response?: root.api.GetFooResponse,
      ) => void;

      /** Enum enum. */
      enum Enum {
        KEY1 = 0,
        KEY2 = 1,
        KEY3 = 2,
      }

      /** Properties Data */
      interface IData {
        name?: string | null;
        value?: number | null;
        field?: root.api.Nest.IData | null;
        enumratee?: root.api.Nest.Enum | null;
      }

      /** Represents Data */
      class Data implements IData {
        constructor(properties?: root.api.Nest.IData);
      }
    }
  }
}

output:

/** Namespace root. */
export declare namespace root {
  /** Namespace api. */
  export namespace api {
    /** Properties of a Foo */
    export interface IFoo {
      /** Foo str */
      str: string;
      /** Foo number */
      num: number;
    }
    export namespace Nest {
      /** Properties Data */
      export interface IData {
        name: string;
        value: number;
        field: root.api.Nest.IData;
        enumratee: RootApiNestEnum;
      }
    }
  }
}
export enum RootApiEnum {
  KEY1_SNAKE_CASE = 0,
  KEY2_SNAKE_CASE = 1,
  KEY3_SNAKE_CASE = 2,
}
export enum RootApiNestEnum {
  KEY1 = 0,
  KEY2 = 1,
  KEY3 = 2,
}

License

MIT © Cyberagent, Inc

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It's CLI tool for optimize TypeScript protobuf type-definition file.

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