utils.js

const path = require('path');

function getOsPath() {
  const runner = process.env.RUNNER_OS;
  switch (runner) {
    case 'Linux':
      return '/home/runner/work/_actions/';
    case 'macOS':
      return '/Users/runner/work/_actions/';
    case 'Windows':
      return 'D:\\a\\_actions\\';
  }
}

/**
 * returns the following information about the current action
 * creator: github user who created the action
 * name: name of the github action
 * version: version of the actions used (can be a branch, a tag or even a commit number)
 * Note this would only work with macOS and Linux, i cant make sure that it works for windows just yet.
 */
function getActionMetadataFromDirname(dirname) {
  const metadata = dirname.replace(getOsPath(), '') // remove os path
    .replace(['', 'node_modules', 'gh-action-stats'].join(path.sep), '') // remove node_modules and 
    .split(path.sep)
  return {
    creator: metadata[0],
    name: metadata[1],
    version: metadata.slice(2).join('/')
  }
}

function getRunMetadata() {
  const envVars = [
    'GITHUB_RUN_ID',
    'GITHUB_ACTION',
    'GITHUB_ACTOR',
    'GITHUB_REPOSITORY',
    'GITHUB_EVENT_NAME',
    'GITHUB_REF',
    'GITHUB_HEAD_REF',
    'GITHUB_BASE_REF',
    'RUNNER_NAME',
    'RUNNER_OS'
  ];
  return envVars.map(v => ({ [v.toLowerCase()]: process.env[v] || null }))
    .reduce((acc, cur) => ({ ...acc, ...cur }))
}

module.exports = {
  getActionMetadataFromDirname,
  getRunMetadata
};