We use changie to automate CHANGELOG generation. For installation and format/command specifics, see the documentation.

• All new change entries get generated under /.changes/unreleased as a yaml file
• header.tpl.md contains the contents of the entire CHANGELOG file
• 0.0.0.md contains the contents of the footer for the entire CHANGELOG file. changie looks to be in the process of supporting a footer file the same as it supports a header file. Switch to that when available. For now, the 0.0.0 in the file name forces it to the bottom of the changelog no matter what version we are releasing.
• .changie.yaml contains the fields in a change, the format of a single change, as well as the format of the Contributors section for each version.

Almost every code change we make associated with an issue will require a CHANGELOG entry. After you have created the PR in GitHub, run changie new and follow the command prompts to generate a yaml file with your change details. This only needs to be done once per PR.

The changie new command will ensure correct file format and file name. There is a one to one mapping of issues to changes. Multiple issues cannot be lumped into a single entry. If you make a mistake, the yaml file may be directly modified and saved as long as the format is preserved.

Note: If your PR has been cleared by the MetricFlow Team as not needing a changelog entry, the Skip Changelog label may be put on the PR to bypass the GitHub action that blocks PRs from being merged when they are missing a CHANGELOG entry.

These commands batch up changes in /.changes/unreleased to be included in this prerelease and move those files to a directory named for the release version. The --move-dir will be created if it does not exist and is created in /.changes.

changie batch <version>  --move-dir '<version>' --prerelease 'rc1'
changie merge

Example

changie batch 1.0.5  --move-dir '1.0.5' --prerelease 'rc1'
changie merge

These commands batch up changes in /.changes/unreleased as well as /.changes/<version> to be included in this final release and delete all prereleases. This rolls all prereleases up into a single final release. All yaml files in /unreleased and <version> will be deleted at this point.

changie batch <version>  --include '<version>' --remove-prereleases
changie merge

Example

changie batch 1.0.5  --include '1.0.5' --remove-prereleases
changie merge

• Changie generates markdown files in the .changes directory that are parsed together with the changie merge command. Every time changie merge is run, it regenerates the entire file. For this reason, any changes made directly to CHANGELOG.md will be overwritten on the next run of changie merge.
• If changes need to be made to the CHANGELOG.md, make the changes to the relevant <version>.md file located in the /.changes directory. You will then run changie merge to regenerate the CHANGELOG.MD.
• Do not run changie batch again on released versions. Our final release workflow deletes all of the yaml files associated with individual changes. If for some reason modifications to the CHANGELOG.md are required after we've generated the final release CHANGELOG.md, the modifications need to be done manually to the <version>.md file in the /.changes directory.
• changie can modify, create and delete files depending on the command you run. This is expected. Be sure to commit everything that has been modified and deleted.