cli-engine/lib/not_found.js

Generic CLI Framework

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _plugins = require('./plugins');

var _plugins2 = _interopRequireDefault(_plugins);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

class NotFound {

  constructor(output, argv) {
    this.argv = argv;
    this.out = output;
    this.config = output.config;
    this.plugins = new _plugins2.default(output);
  }

  allCommands() {
    return this.plugins.commands.reduce((commands, c) => {
      return commands.concat([c.id]).concat(c.aliases || []);
    }, []);
  }

  closest(cmd) {
    const DCE = require('string-similarity');
    return DCE.findBestMatch(cmd, this.allCommands()).bestMatch.target;
  }

  async isValidTopic(name) {
    let t = await this.plugins.findTopic(name);
    return !!t;
  }

  async run() {
    await this.plugins.load();

    let closest;
    let binHelp = `${this.config.bin} help`;
    let id = this.argv[1];
    let idSplit = id.split(':');
    if (await this.isValidTopic(idSplit[0])) {
      // if valid topic, update binHelp with topic
      binHelp = `${binHelp} ${idSplit[0]}`;
      // if topic:COMMAND present, try closest for id
      if (idSplit[1]) closest = this.closest(id);
    } else {
      closest = this.closest(id);
    }

    let perhaps = closest ? `Perhaps you meant ${this.out.color.yellow(closest)}\n` : '';
    this.out.error(`${this.out.color.yellow(this.argv[1])} is not a ${this.config.bin} command.
${perhaps}Run ${this.out.color.cmd(binHelp)} for a list of available commands.`, 127);
  }
}
exports.default = NotFound;