Add MAINTAINERS.md to describe how to release.

MAINTAINERS.md

@@ -0,0 +1,146 @@
+Guide for maintainers of Hibernate ORM
+====
+
+This guide is intended for maintainers of Hibernate ORM,
+i.e. anybody with direct push access to the git repository.
+
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md).
+
+## Continuous integration
+
+Continuous integration is split across two platforms:
+
+* GitHub Actions at https://github.com/hibernate/hibernate-orm/actions
+* a self-hosted Jenkins instance at https://ci.hibernate.org.
+
+### GitHub Actions workflows
+
+TODO: describe the workflows available.
+
+### Jenkins main pipeline
+
+https://ci.hibernate.org/job/hibernate-orm-pipeline/
+
+This job takes care of testing additional DBs for:
+
+* Primary branch builds
+* Pull request builds
+
+It is generally triggered on push,
+but can also be triggered manually,
+which is particularly useful to test more environments on a pull request.
+
+See [Jenkinsfile](Jenkinsfile) for the job definition.
+
+### Release pipeline
+
+https://ci.hibernate.org/job/hibernate-orm-release/
+
+This job takes care of releases. It is triggered manually.
+
+See [ci/release/Jenkinsfile](ci/release/Jenkinsfile) for the job definition.
+
+See [Releasing](#releasing) for more information.
+
+## <a id="releasing"></a> Releasing
+
+### Automated releases
+
+On select maintenance branches (`6.2`, `6.4`, ...),
+micro releases (`x.y.1`, `x.y.2`, ...) are performed as soon as you push to that branch.
+
+Make sure to assign fix versions properly before merging pull requests.
+
+No announcements are expected for such releases:
+neither through X, blog posts, or email.
+
+### Manual releases
+
+On `main` and some maintenance branches (`6.5`, ...),
+automated releases are disabled.
+
+You must perform releases by manually triggering a CI job.
+
+#### Preparing the release
+
+In any case, before the release:
+
+* Check that everything has been pushed to the upstream repository.
+* Check that the [CI jobs](#continuous-integration) for the branch you want to release are green.
+* Check Jira [Releases](https://hibernate.atlassian.net/projects/HHH?selectedItem=com.atlassian.jira.jira-projects-plugin%3Arelease-page):
+  * Check that the release you are about to publish exists in Jira.
+  * Check there are no outstanding issues assigned to that release.
+  * Check there are no resolved/closed issues in the corresponding "work-in-progress version"
+    (e.g. `6.6`, `6.6-next`, ... naming convention may vary);
+    if there are, you might want to assign them to your release.
+
+**If it is a new major or minor release**, before the release:
+
+* Reset the migration guide to include only information relevant to the new major or minor.
+
+**If it's a `.CR` or `.Final` release**, before the release:
+
+* Check that the [migration guide](documentation/src/main/asciidoc/migration/index.adoc) is up to date.
+  In particular, check the git history for API/SPI changes
+  and document them in the migration guide.
+
+#### Performing the release
+
+Once you trigger the CI job, it automatically pushes artifacts to the
+[OSSRH repository manager](https://oss.sonatype.org/#stagingRepositories),
+the distribution to [SourceForge](https://sourceforge.net/projects/hibernate/files/hibernate-search/)
+and the documentation to [docs.jboss.org](https://docs.jboss.org/hibernate/search/).
+
+* Do *not* mark the Jira Release as "released" or close issues,
+  the release job does it for you.
+* Do *not* update the repository (in particular changelog.txt and README.md), 
+  the release job does it for you.
+* Trigger the release on CI:
+  * Go to CI, to [the "hibernate-orm-release" CI job](https://ci.hibernate.org/job/hibernate-orm-release/).
+  * Click the "run" button (the green triangle on top of a clock, to the right) next to the branch you want to release.
+  * **Be careful** when filling the form with the build parameters.
+    Note only `RELEASE_VERSION` is absolutely necessary.
+  * Note that for new branches where the job has never run, the first run may not ask for parameters and thus may fail:
+    that's expected, just run it again.
+* After the job succeeds, check the artifacts are available on Maven Central:
+  https://repo1.maven.org/maven2/org/hibernate/hibernate-core/.
+  They should appear after a few minutes, sometimes a few hours.
+
+#### Announcing the release
+
+* Blog about release on [in.relation.to](https://github.com/hibernate/in.relation.to).
+  Make sure to use the tags "Hibernate ORM" and "Releases" for the blog entry.
+  Use [release-announcement.adoc](release-announcement.adoc) as a starting point.
+* Update [hibernate.org](https://github.com/hibernate/hibernate.org) if necessary:
+  * If it is a new major or minor release, add a `_data/projects/orm/releases/series.yml` file
+    and a `orm/releases/<version>/index.adoc` file.
+  * Adjust the release file in `_data/projects/orm/releases`: use a meaningful summary and set `announcement_url` to the blog post, if any.
+  * Depending on which series you want to have displayed,
+    make sure to adjust the `status`/`displayed` attributes of the `series.yml` file of the old series.
+  * Push to the production branch.
+* Send an email to `[email protected]` and CC `[email protected]`.
+* Tweet about the release via the `@Hibernate` account.
+
+#### Updating depending projects
+
+If you just released the latest stable, you will need to update other projects:
+
+* Approve and merge automatic updates that dependabot will send (it might take ~24h):
+  * In the [test case templates](https://github.com/hibernate/hibernate-test-case-templates/tree/master/search).
+  * In the [demos](https://github.com/hibernate/hibernate-demos/tree/master/hibernate-search).
+* **If it's a `.Final` release**, upgrade the Hibernate ORM dependency manually:
+  * In the [Quarkus BOM](https://github.com/quarkusio/quarkus/blob/main/bom/application/pom.xml).
+  * In any other relevant project.
+
+#### Updating Hibernate ORM
+
+In any case:
+
+* Reset [release-announcement.adoc](release-announcement.adoc).
+
+**If it is a new major or minor release**:
+
+* Reset the migration guide on the `main` branch if you forgot about it when preparing the release.
+* Create a maintenance branch for the previous series, if necessary; see [branching](branching.adoc).

branching.adoc

@@ -11,7 +11,7 @@ Describes the paradigm used for branching within the ORM project
 * PR branches for performance improvements, security fixes and bugfixes target the affected minor branches (which could be main for a short period of time)
 
 [[process]]
-== THe Process
+== The Process
 
 Process (using 6.3 -> 6.4 as an example):