A PHP CLI to update a changelog with the latest release notes.

Want to automate the process of updating your changelog with GitHub Actions? Checkout the stefanzweifel/changelog-updater-action which does exactly that.

If your changelog follows the "Keep a Changelog" format and has a "Unreleased" heading in it, the CLI will update the link in and place the release notes below heading.

You can install the changelog-updater CLI as a composer dependency in your project or globally. It requires PHP 8.2 or higher.

composer global require wnx/changelog-updater

You can use changelog-updater by running the update command with the following options.

php changelog-updater update \
--release-notes="### Added
- New Feature A
- New Feature B

### Changed
- Update Feature C

### Removes
- Remove Feature D" \
--latest-version="v1.0.0" \
--release-date="2021-08-07" \
--path-to-changelog="CHANGELOG.md" \
--compare-url-target-revision="1.x" \
--write

--release-date, --path-to-changelog, --compare-url-target-revision and --write are optional. Learn more about the options by running php changelog-updater update --help.

If a given version already exists in the CHANGELOG, the CLI will display a warning and not update the CHANGELOG.

Required. The release notes you want to add to your changelog. Should be markdown.

Required. Version number of the latest release. The value will be used as the heading text if --heading-text is not set. If the changelog has a "Unreleased" heading, the value will be used in the updated compare URL.

Example: v1.0.0

Optional (Defaults to current date). The date the latest version has been released. The value will be used in the release heading.

Optional (Defaults to CHANGELOG.md). Path to CHANGELOG.md file.

Optional (Defaults to HEAD). If the changelog has a "Unreleased" heading, the value will be used together with the --latest-version value in the updated compare URL.

Optional. Write the changes to CHANGELOG.md or to the value of --path-to-changelog.

Optional. Will output values for UNRELEASED_COMPARE_URL and RELEASE_COMPARE_URL that can be picked up by GitHub Actions and further used in ones Workflow.

Optional (Defaults to value of --latest-version). The text value used in the heading that is created for the new release.

## heading-text - 2021-02-01
## [heading-text](https://github.com/org/repo/compare/v0.1.0...v1.0.0) - 2021-02-01

Optional. Tell the CLI explicitly to use the content between an "Unreleased Heading" and the previous version heading as release notes. The value from --release-notes will be ignored.

Optional. Don't add the release date to the release heading.

Optional. Look for GitHub usernames in --release-notes and linkify them. Currently not supported for release notes that are located in the existing changelog.

- Added a new feature @stefanzweifel
+ Added a new feature [@stefanzweifel](https://github.com/stefanzweifel)

The CLI does its best to place the given release notes in the right place. The CLI looks for the first second level heading in your current CHANGELOG.md file. It assumes that this heading represents the previous version. Here is an example of a CHANGELOG.md that the CLI can understand.

# Changelog

## v1.0.0 - 2021-11-01

### Added
- Initial Release

The CLI will then place the new version and its release notes above the existing versions.

# Changelog

+ ## v1.1.0 - 2021-11-10
+ 
+ ### Added
+ 
+ * New Feature
+ 
## v1.0.0 - 2021-11-01

### Added

* Initial Release

If the changelog does not contain a second level heading, it considers the changelog to be "empty". It will then place the release notes at the bottom of the document.

# Changelog
All notable changes to this project will be documented in this file.

+## v1.0.0 - 2021-11-01
+
+### Added
+
+* Initial Release

If your changelog follows the "Keep a Changelog" format and contains an "Unreleased"-heading with a link to the repository compare view, the CLI will automatically update the link in the Unreleased heading.

Here is an example of a changelog, before it is updated with the CLI.

# Changelog

## [Unreleased](https://github.com/org/repo/compare/v1.0.0...HEAD)

Please do not update the unreleased notes.

<!-- Content should be placed here -->

## v1.0.0 - 2021-01-01

### Added
- Initial Release

Below you find a diff-view of how the CLI will update the changelog.

# Changelog

+## [Unreleased](https://github.com/org/repo/compare/v1.1.0...HEAD)
-## [Unreleased](https://github.com/org/repo/compare/v1.0.0...HEAD)

Please do not update the unreleased notes.

<!-- Content should be placed here -->
+## [v1.1.0](https://github.com/org/repo/compare/v1.0.0...v1.1.0) - 2021-02-01
+
+### Added
+
+* New Feature A
+* New Feature B
+

## v1.0.0 - 2021-01-01

### Added
* Initial Release

The content between the "Unreleased"-heading and the latest version will remain untouched by the CLI.

If you don't have a "Unreleased"-heading in your changelog, but the headings of your previous releases contain a link to the repository compare view, the CLI will add links to the compare view to the added release heading.

# Changelog

+## [v1.1.0](https://github.com/org/repo/compare/v1.0.0...v1.1.0) - 2021-02-01
+
+### Added
+
+* New Feature A
+* New Feature B
+

## [v1.0.0](https://github.com/org/repo/compare/v0.1.0...v1.0.0) - 2021-01-01

### Added
* Initial Release

composer test

Please see CHANGELOG for more information on what has changed recently.

Please see CONTRIBUTING for details.

Please review our security policy on how to report security vulnerabilities.

• Stefan Zweifel
• All Contributors

The MIT License (MIT). Please see License File for more information.