Generate a Changelog for a GitHub Milestone

To generate a markdown changelog that comprise the list of bugs and issues in a GitHub milestone follow these steps:

• Download a release JAR or use the Docker image.

• Configure the application with the following properties:

changelog:
  repository: owner/name
github:
  username:
  password:

Note	When generating a changelog for a public repository, the username and password properties are optional. However, specifying them ensures that you don’t hit GitHub’s rate limit easily.

If you’re using GitHub enterprise, the base url can be set using github.api-url.

Tip	If you are only configuring a few properties you can alternatively use application arguments such as --changelog.repository=…​.

• Run the following commands:

$ java -jar github-changelog-generator.jar <milestone> <path_to_generate_file>

Note	By default <milestone> refers to the milestone title. If you want to use milestone ID, you should set the changelog.milestone-reference property to id.

Customizing Sections

By default the changelog will contain the following sections:

Title	Label Text
":star: New Features"	"enhancement"
":lady_beetle: Bug Fixes"	"regression" or "bug"
":notebook_with_decorative_cover: Documentation"	"documentation"
":hammer: Dependency Upgrades"	"dependency-upgrade"

The title is in Markdown format and emoji like ":star:" can be used. If you want something different then you can add sections YAML:

changelog:
  sections:
  - title: "Enhancements"
    labels: ["new"]
  - title: "Bugs"
    labels: ["fix"]

You can also customize the contributors title using:

changelog:
  contributors:
    title: "Contributors"

You can add external links such as release notes for quick access using:

changelog:
  external_links:
  - name: "Release Notes"
    location: "https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.3-Release-Notes"

Showing Issues in Multiple Sections

Unless otherwise configured, issues will only appear in the first matching section. For example, if you have an issue labeled with enhancement and documentation then it will only appear in the "New Features" section.

If you want an issue to appear in multiple sections, you can use the group property. Groups allow you to create logical groupings of related sections. An issue may only appear once in any given group.

For example, you might define the following:

changelog:
  sections:
  - title: "Highlights"
    labels: ["noteworthy"]
    group: "highlights"
  - title: "Enhancements"
    labels: ["new"]
  - title: "Bugs"
    labels: ["fix"]

This will create two distinct groups, "highlights" and "default" (which is used if no group property is specified). An issue labeled with new and noteworthy will appear in both the "Highlights" and "Enhancements" section.

Excluding Issues

Issues and pull requests can be excluded from the changlog by configuring exclusions. You can ignore all items that have certain labels using changelog.issues.exclude.labeles. For example:

changelog:
  issues:
    exclude:
      labels: ["wontfix", "question", "duplicate", "invalid"]

Excluding Contributors

If you have contributors that you don’t want to thank (perhaps core team members or bots), you can set the following:

changelog:
  contributors:
    exclude:
      names: ["dependabot"]

You can also use * if you want to drop the contributors section entirely.

Sorting Issues

By default issues are sorted by their "created" date. If you want to order them by title instead you can set changelog.issues.sort to title. It’s also set the property on section configuration if you want ordering per section:

changelog:
  sections:
  - title: "Bugs"
    labels: ["bug"]
  - title: "Dependency Upgrades"
    labels: ["dependency"]
    sort: "title"

Following Ported Issues

If an issue is forward-ported or backward-ported between milestones, you might have separate issues in each milestone that reference the original issue. To credit a contributor in the changelog for every milestone that includes a forward or backward port of the issue that was resolved, configure the labels that are used to identify ported issues. The body of a ported issue should contain a comment with a reference to the original issue, which is extracted using a regular expression with exactly one capture group for the original issue number.

changelog:
  issues:
    ports:
      - label: "status: forward-port"
        bodyExpression: 'Forward port of issue #(\d+).*'
      - label: "status: backport"
        bodyExpression: 'Back port of issue #(\d+).*'

License

This project is Open Source software released under the Apache 2.0 license.