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community-plugins/docs/plugin-maintainers-guide.md

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Plugin Maintainer Guide

Table of Contents

Plugin Owner Expectations

Plugin ownership is codified by the CODEOWNERS file.

Plugin ownership is a responsibility often taken on voluntarily and/or in addition to primary job roles. While there are expectations outlined here, this is not a support commitment. Timely responses are appreciated, but replies may not be immediate and will depend on availability.

PR Reviews & Merging

Plugin owners are assumed to have full autonomy over reviewing and merging PRs for their workspace. This includes the merging of Version Packages PRs to trigger a new release.

It is also helpful for workspace owners to review and add approvals to PRs that touch multiple workspaces (such as dependency updates), as these may be landed by @backstage/community-plugin-maintainers.

Issue Triage

Plugin owners should triage issues related to their plugin as needed. The @backstage/community-plugin-maintainers group may tag the listed owners on relevant issues.

Version Bumping

Plugin owners are expected to run the Version Bump script for their workspace. The process follows the guidance outlined in the Version Bumping Documentation.

Opt-in to Automatic Version Bump PRs

Plugin owners can opt in to automatic version bump PRs by creating an empty .auto-version-bump file in the root of their workspace (workspaces/${WORKSPACE}/.auto-version-bump). This signals that your plugin should be included in the batch version bump workflow, which is triggered manually by one of the @backstage/community-plugins-maintainers .

These automated PRs are intended as a convenience to open the version bump for you. As the plugin maintainer, you would still be required to:

  • Review the PR
  • Make any necessary patches to adopt the upgrade
  • Merge the PR once it's ready

Maintaining and patching an older release line

It may be necessary to patch a prior release line of a plugin when users depend on an older, but stable version and while a newer, incompatible, major version of the plugin exists. Typically for these older releases, only major bugs and security issues will need to be remediated. Not every plugin will need this workflow.

This guide will describe the steps needed to release on an older version.

Patching an older release

When patching an older release, follow the steps below to ensure the correct workflow is applied:

  1. Request a workspace/${workspace} branch by asking one of the @backstage/community-plugins-maintainers.

    • Ensure that a branch named workspace/${workspace} exists, with appropriate branch protections in place. This branch will be used for patch releases.
    • The ${workspace} should correspond to the specific plugin or component you are patching.
    Community Plugins Maintainers - Branch Protection Settings

    In GitHub > Repo > Settings > Branches, add a rule for the requested workspace/${workspace} branch and apply these settings:

    • ☑ Require pull request before merging
      • ☑ Require approvals
      • ☑ Dismiss stale approvals when new commits are pushed
      • ☑ Require review from Code Owners
    • ☑ Require status checks to pass before merging
    • ☑ Restrict who can push: CODEOWNERS for the workspace
    • ☑ Restrict pushes that create matching branches
    • ☑ Allow force pushes
      • ☑ Specify who can force push: CODEOWNERS for the workspace

  2. Reset the workspace branch:

    • Reset the workspace/${workspace} branch to the version of the plugin you need to patch.
    • You can use the autogenerated version tags from previous releases to pinpoint the prior release version to apply the patch.

  3. Apply your commits and push to a branch:

    • Apply the necessary patch fixes or security updates.
    • Do not manually bump the version in package.json. The version bump must be handled via changesets.
    • Push to a branch on the backstage/community-plugins repository. Note that it is not possible to open PRs from a fork for this release workflow.

  4. Submit a PR following the required workflow:

    • Open a pull request with your changes against the workspace/${workspace} branch.
    • Ensure the PR:
      • Contains only necessary fixes.
      • Includes a changeset.

  5. Merge the PR to trigger the release workflow:

    • The PR must meet these conditions to be merged:
      • The PR title starts with "Version Packages" (automatically generated by changesets).
      • The PR originates from a maintenance-changesets-release/${workspace} branch.
      • The PR is authored by backstage-service.
      • The PR is merged, not just closed.
    • Once merged, the release workflow will automatically trigger, building and publishing the new release.

  6. Confirm the release:

    • Once the workflow completes, a new version will be published.
    • A new Git tag will be created, which can be used for future patches.
    • The release will be tagged as "maintenance" in the package registry to avoid overwriting latest stable versions.

  7. Open a PR with the CHANGELOG additions to backstage/community-plugins main branch:

    • This is necessary for history to be clear on the latest branch.
    • You can use git cherry-pick --no-commit workspace/${workspace} and only commit the CHANGELOG files.