npx-run/parse-args.js

Easily run scripts using npx.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.parseArgs = exports.splitByScripts = exports.isPattern = exports.scriptKeys = void 0;

var _stringArgv = _interopRequireDefault(require("string-argv"));

var _iterables = require("./iterables");

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

const scriptKeys = scripts => Object.keys(scripts);

exports.scriptKeys = scriptKeys;

const isPattern = scriptOrPattern => scriptOrPattern.includes('*');

exports.isPattern = isPattern;

function* getMatchingScripts(scriptOrPattern, scripts) {
  if (scripts[scriptOrPattern]) {
    yield scriptOrPattern;
    return;
  }

  if (!isPattern(scriptOrPattern)) {
    return;
  }

  const pattern = new RegExp(`^${scriptOrPattern.replace(/\*/g, '.*?')}$`);

  for (const script of scriptKeys(scripts)) {
    if (script.match(pattern)) {
      yield script;
    }
  }
}

const isScriptOrPattern = scripts => pattern => {
  const [first] = getMatchingScripts(pattern, scripts);
  return first !== undefined;
};

function* expandScriptPatterns(runArgs, [pattern, ...scriptArgs], scripts) {
  for (const matchedScript of getMatchingScripts(pattern, scripts)) {
    const command = (0, _stringArgv.default)(scripts[matchedScript]);
    yield [runArgs, matchedScript, [...command, ...scriptArgs]];
  }
}

const splitByScripts = (args, scripts) => (0, _iterables.groups)(args, isScriptOrPattern(scripts));

exports.splitByScripts = splitByScripts;

function* getTasks(args, scripts) {
  const [runArgs, scriptsAndArgs] = (0, _iterables.headTail)(splitByScripts(args, scripts));

  for (const argGroup of scriptsAndArgs) {
    yield* expandScriptPatterns(runArgs, argGroup, scripts);
  }
}

const parseArgs = (args, scripts) => {
  const [arg] = args;
  const dryRun = arg === '--dry-run';
  const help = arg === '--help';
  const remainingArgs = dryRun ? args.slice(1) : args;
  const finalArgs = remainingArgs.length ? remainingArgs : ['default'];
  const tasks = getTasks(finalArgs, scripts);
  return {
    tasks,
    dryRun,
    help
  };
};

exports.parseArgs = parseArgs;