const semanticRelease = require("semantic-release");
const { WritableStreamBuffer } = require("stream-buffers");

const stdoutBuffer = new WritableStreamBuffer();
const stderrBuffer = new WritableStreamBuffer();

try {
  const result = await semanticRelease(
    {
      // Core options
      branches: [
        "+([0-9])?(.{+([0-9]),x}).x",
        "master",
        "main",
        "next",
        "next-major",
        { name: "beta", prerelease: true },
        { name: "alpha", prerelease: true },
      ],
      repositoryUrl: "https://github.com/me/my-package.git",
      // Shareable config
      extends: "my-shareable-config",
      // Plugin options
      githubUrl: "https://my-ghe.com",
      githubApiPathPrefix: "/api-prefix",
    },
    {
      // Run semantic-release from `/path/to/git/repo/root` without having to change local process `cwd` with `process.chdir()`
      cwd: "/path/to/git/repo/root",
      // Pass the variable `MY_ENV_VAR` to semantic-release without having to modify the local `process.env`
      env: { ...process.env, MY_ENV_VAR: "MY_ENV_VAR_VALUE" },
      // Store stdout and stderr to use later instead of writing to `process.stdout` and `process.stderr`
      stdout: stdoutBuffer,
      stderr: stderrBuffer,
    }
  );

  if (result) {
    const { lastRelease, commits, nextRelease, releases } = result;

    console.log(
      `Published ${nextRelease.type} release version ${nextRelease.version} containing ${commits.length} commits.`
    );

    if (lastRelease.version) {
      console.log(`The last release was "${lastRelease.version}".`);
    }

    for (const release of releases) {
      console.log(`The release was published with plugin "${release.pluginName}".`);
    }
  } else {
    console.log("No release published.");
  }

  // Get stdout and stderr content
  const logs = stdoutBuffer.getContentsAsString("utf8");
  const errors = stderrBuffer.getContentsAsString("utf8");
} catch (err) {
  console.error("The automated release failed with %O", err);
}

{
  gitHead: 'da39a3ee5e6b4b0d3255bfef95601890afd80709',
  version: '1.0.0',
  gitTag: 'v1.0.0',
  channel: 'next'
}

[
  {
    commit: {
      long: '68eb2c4d778050b0701136ca129f837d7ed494d2',
      short: '68eb2c4'
    },
    tree: {
      long: '7ab515d12bd2cf431745511ac4ee13fed15ab578',
      short: '7ab515d'
    },
    author: {
      name: 'Me',
      email: '[email protected]',
      date: 2018-07-22T20:52:44.000Z
    },
    committer: {
      name: 'Me',
      email: '[email protected]',
      date: 2018-07-22T20:52:44.000Z
    },
    subject: 'feat: a new feature',
    body: 'Description of the new feature',
    hash: '68eb2c4d778050b0701136ca129f837d7ed494d2',
    message: 'feat: a new feature\n\nDescription of the new feature',
    committerDate: 2018-07-22T20:52:44.000Z
  }
 ]

{
  type: 'minor',
  gitHead: '68eb2c4d778050b0701136ca129f837d7ed494d2',
  version: '1.1.0',
  gitTag: 'v1.1.0',
  notes: 'Release notes for version 1.1.0...',
  channel : 'next'
}

[
  {
    name: 'GitHub release',
    url: 'https://github.com/me/my-package/releases/tag/v1.1.0',
    type: 'minor',
    gitHead: '68eb2c4d778050b0701136ca129f837d7ed494d2',
    version: '1.1.0',
    gitTag: 'v1.1.0',
    notes: 'Release notes for version 1.1.0...',
    pluginName: '@semantic-release/github'
    channel: 'next'
  },
  {
    name: 'npm package (@latest dist-tag)',
    url: 'https://www.npmjs.com/package/my-package',
    type: 'minor',
    gitHead: '68eb2c4d778050b0701136ca129f837d7ed494d2',
    version: '1.1.0',
    gitTag: 'v1.1.0',
    notes: 'Release notes for version 1.1.0...',
    pluginName: '@semantic-release/npm'
    channel: 'next'
   }
 ]