@gasket/plugin-command

Enable plugins to inject new commands to be available for use with the Gasket CLI. Executes the commands lifecycle in the configure hook of the @gasket/plugin-command plugin. This plugin utilizes Commander.js and additional documentation can be found in the documentation.

Installation

npm i @gasket/plugin-command

Update your gasket file plugin configuration:

import { makeGasket } from '@gasket/core';
+ import pluginCommand from '@gasket/plugin-command';

export default makeGasket({
  plugins: [
    // other plugins
+    pluginCommand
  ]
});

Lifecycles

Commands

Executed in the configure hook of @gasket/plugin-command if the gasket command is present in the argv. The gasket command is the CLI execution of the gasket.js file.

export default {
  name: 'test-plugin',
  hooks: {
    commands(gasket) {
      return {
        id: 'test-plugin-cmd',
        description: 'Test plugin',
        action: async () => {
          console.log('test-plugin');
        }
      }
    }
  }
};

Commands can be configured with options (flags), arguments, defaults, and parsing functions.

Example with arguments

Add arguments to the command by adding an args array in the command definition.

export default {
  name: 'test-plugin',
  hooks: {
    commands(gasket) {
      return {
        id: 'test-plugin-cmd',
        description: 'Test plugin',
        args: [
          {
            name: 'message',
            description: 'Message to display',
            required: true // error if message argument is not provided
          },
          {
            name: 'optional-message',
            description: 'Optional message to display'
          }
        ],
        // Arguments are spread into the action function
        action: async (message, optionalMessage) => {
          console.log('test-plugin', message);
          console.log('test-plugin:optional', optionalMessage);
        }
      }
    }
  }
};

Execute the command with the message argument.

node ./gasket.js test-plugin-cmd "Hello, World!"
# result: test-plugin Hello, World!

# Optional message
node ./gasket.js test-plugin-cmd "Hello, World!" "Optional message"
# result: test-plugin Hello, World!
# result: test-plugin:optional Optional message

Example with options

Add options to the command by adding an options array in the command definition.

export default {
  name: 'test-plugin',
  hooks: {
    commands(gasket) {
      return {
        id: 'test-plugin-cmd',
        description: 'Test plugin',
        options: [
          {
            name: 'message',
            description: 'Message to display',
            required: true, // error if --message option is not provided
            short: 'm',
            type: 'string'
          },
          {
            name: 'optional-message',
            description: 'Optional message to display',
            short: 'op',
            type: 'string'
          }
        ]
        // hyphenated options are camelCased
        action: async ({ message, optionalMessage }) => {
          console.log('test-plugin', message);
          console.log('test-plugin:optional', optionalMessage);
        }
      }
    }
  }
};

Execute the command with the --message option.

node ./gasket.js test-plugin-cmd --message "Hello, World!"
# result: test-plugin Hello, World!

# Short option
node ./gasket.js test-plugin-cmd -m "Hello, World!"
# result: test-plugin Hello, World!

# Optional message
node ./gasket.js test-plugin-cmd --message "Hello, World!" --optional-message "Optional message"
# result: test-plugin Hello, World!
# result: test-plugin:optional Optional message

Example with parsing function

Add a parse function to the option to parse the value before it is passed to the action function.

export default {
  name: 'test-plugin',
  hooks: {
    commands(gasket) {
      return {
        id: 'test-plugin-cmd',
        description: 'Test plugin',
        args: [
          {
            name: 'numberOfItems',
            description: 'Retrieve a number of items from an array',
            required: true // error if message argument is not provided
          }
        ],
        options: [
          {
            name: 'groceryList',
            description: 'List of grocery items',
            required: true,
            type: 'string',
            parse: (value) => value.split(',') // split string to an array
          }
        ],
        // args are spread and options are passed as an object
        action: async (numberOfItems, { groceryList }) => {
          const items = groceryList.slice(0, numberOfItems);
          console.log('test-plugin', items);
        }
      }
    }
  }
};

Execute the command with the --groceryList option.

node ./gasket.js test-plugin-cmd 3 --groceryList "apple,banana,orange,grape"
# result: test-plugin [ 'apple', 'banana', 'orange' ]

Example with JSDoc Types

The CommandsHook type is available for type checking your hook's arguments and options.

export default {
  name: 'test-plugin',
  hooks: {
    /* @type {import('@gasket/plugin-command').CommandsHook} */
    commands(gasket) {
      return {
        id: 'test-plugin-cmd',
        description: 'Test plugin',
        args: [
          {
            name: 'numberOfItems',
            description: 'Retrieve a number of items from an array',
            required: true // error if message argument is not provided
          }
        ],
        options: [
          {
            name: 'groceryList',
            description: 'List of grocery items',
            required: true,
            type: 'string',
            parse: (value) => value.split(',') // split string to an array
          }
        ],
        // args are spread and options are passed as an object
        action: async (numberOfItems, { groceryList }) => {
          const items = groceryList.slice(0, numberOfItems);
          console.log('test-plugin', items);
        }
      }
    }
  }
};