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JavaScript API

Usage

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",
        "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);
}

API

semanticRelease([options], [config]) => Promise

Run semantic-release and returns a Promise that resolves to a Result object.

options

Type: Object

semantic-release options.

Can be used to set any core option or plugin options.

Each option, will take precedence over options configured in the configuration file and shareable configurations.

config

Type: Object

semantic-release configuration specific for API usage.

cwd

Type: String
Default: process.cwd()

The current working directory to use. It should be configured to the root of the Git repository to release from.

It allows to run semantic-release from a specific path without having to change the local process cwd with process.chdir().

env

Type: Object
Default: process.env

The environment variables to use.

It allows to run semantic-release with specific environment variables without having to modify the local process.env.

stdout

Type: stream.Writable
Default: process.stdout

The writable stream used to log information.

It allows to configure semantic-release to write logs to a specific stream rather than the local process.stdout.

stderr

Type: stream.Writable
Default: process.stderr

The writable stream used to log errors.

It allows to configure semantic-release to write errors to a specific stream rather than the local process.stderr.

Result

Type: Object Boolean

And object with lastRelease, nextRelease, commits and releases if a release is published or false if no release was published.

lastRelease

Type: Object

Information related to the last release found:

Name Type Description
version String The version of the last release.
gitHead String The sha of the last commit being part of the last release.
gitTag String The Git tag associated with the last release.
channel String The distribution channel on which the last release was initially made available (undefined for the default distribution channel).

Note: If no previous release is found, lastRelease will be an empty Object.

Example:

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

commits

Type: Array<Object>

The list of commit included in the new release.
Each commit object has the following properties:

Name Type Description
commit Object The commit abbreviated and full hash.
commit.long String The commit hash.
commit.short String The commit abbreviated hash.
tree Object The commit abbreviated and full tree hash.
tree.long String The commit tree hash.
tree.short String The commit abbreviated tree hash.
author Object The commit author information.
author.name String The commit author name.
author.email String The commit author email.
author.short String The commit author date.
committer Object The committer information.
committer.name String The committer name.
committer.email String The committer email.
committer.short String The committer date.
subject String The commit subject.
body String The commit body.
message String The commit full message (subject and body).
hash String The commit hash.
committerDate String The committer date.

Example:

[
  {
    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
  }
 ]

nextRelease

Type: Object

Information related to the newly published release:

Name Type Description
type String The semver type of the release (patch, minor or major).
version String The version of the new release.
gitHead String The sha of the last commit being part of the new release.
gitTag String The Git tag associated with the new release.
notes String The release notes for the new release.
channel String The distribution channel on which the next release will be made available (undefined for the default distribution channel).

Example:

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

releases

Type: Array<Object>

The list of releases published or made available to a distribution channel.
Each release object has the following properties:

Name Type Description
name String Optional. The release name, only if set by the corresponding publish plugin.
url String Optional. The release URL, only if set by the corresponding publish plugin.
type String The semver type of the release (patch, minor or major).
version String The version of the release.
gitHead String The sha of the last commit being part of the release.
gitTag String The Git tag associated with the release.
notes String The release notes for the release.
pluginName String The name of the plugin that published the release.
channel String The distribution channel on which the release is available (undefined for the default distribution channel).

Example:

[
  {
    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'
   }
 ]