This document covers the common release procedures used by the Maven team to perform releases.
Be sure that:
If you started here, you may first want to review one of the following documents that cover the specifics of various types of releases we have in the Maven Project:
If the item you are planning to release is not using the most recent version of its parent (see parent POMs index), consider taking this opportunity to update to it.
Particularly if you update the parent (but sometimes under other circumstances), the site compilation process may fail, or reveal a conspicuous error, or deploy to the wrong location. It is stressful and time-consuming to discover this *after* you stage a release and then try to follow the procedure to deploy the site for review. So you may find it more pleasant to check out the state of the site before you start.
Propose a vote on the dev list with the closed issues, the issues left, the staging repository and the staging site. For instance:
To: "Maven Developers List" <email@example.com> Subject: [VOTE] Release Apache Maven XXX Plugin version Y.Z Hi, We solved N issues: https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=XXXXXX&version=YYYYYYY&styleName=Text There are still a couple of issues left in JIRA: https://issues.apache.org/jira/issues/?jql=project%20%3D%20XXXXXXXXXX%20AND%20status%20%3D%20Open%20ORDER%20BY%20key%20DESC%2C%20priority%20DESC Staging repo: https://repository.apache.org/content/repositories/maven-[YOUR REPOSITORY ID]/ https://repository.apache.org/content/repositories/maven-[YOUR REPOSITORY ID]/[PATH-TO]-source-release.zip Source release checksum(s): [NAME-OF]-source-release.zip sha1: [SHA1SUM] Staging site: https://maven.apache.org/plugins-archives/maven-XXX-plugin-LATEST/ Guide to testing staged releases: https://maven.apache.org/guides/development/guide-testing-releases.html Vote open for at least 72 hours. [ ] +1 [ ] +0 [ ] -1
To get the JIRA release notes link, browse to the plugin's JIRA page, select the Road Map link, and use the link to Release Notes that is next to the version being released.
To get the list of issues left in JIRA, browse to the plugin's JIRA page, and from the Preset Filters on the right, use the link for Outstanding issues.
Copied from Votes on Package Releases.
Votes on whether a package is ready to be released use majority approval -- i.e. at least three PMC members must vote affirmatively for release, and there must be more positive than negative votes. Releases may not be vetoed. Generally the community will cancel the release vote if anyone identifies serious problems, but in most cases the ultimate decision, lies with the individual serving as release manager. The specifics of the process may vary from project to project, but the 'minimum quorum of three +1 votes' rule is universal.
The list of PMC members is available at https://people.apache.org/committers-by-project.html#maven-pmc.
Once a vote is successful, post the result to the dev list and cc the PMC. For instance:
To: "Maven Developers List" <firstname.lastname@example.org> CC: "Maven Project Management Committee List" <email@example.com> Subject: [RESULT] [VOTE] Release Apache Maven XXX Plugin version Y.Z Hi, The vote has passed with the following result: +1 : <<list of names>> PMC quorum: ... I will promote the artifacts to the central repo.
If the vote is unsuccessful, the process will need to be restarted. Be sure to drop your staging repository as described in Dropping a Repo.
The official Apache release is the 'source-release' bundle. All releases must be copied to the official release area. The release area is maintained with svnsubpub. To deliver a release, you add it to the subversion repository for the dist area: add the release, its signature, and corresponding MD5 files. Currently this requires to be in maven-pmc group (see https://issues.apache.org/jira/browse/INFRA-5945).
wagon/wagon-2.2-source-release.zip wagon/wagon-2.2-source-release.zip.asc wagon/wagon-2.2-source-release.zip.md5
You should also run 'svn rm' as needed to clear out older releases. As per the policy, only the latest release on a branch should stay in the main dist areas. So long as the previous release is at least a day old, the automatic archiver will have copied it to the archive.
To check that everything is ok in the dist area, dist-tool-plugin has been written and run once a day to produce "Disttool> Source Release" report.
Once the release is deemed fit for public consumption it can be transfered to a production repository where it will be available to all users.
As above, deploy the web site if appropriate and update the project site for the new release: use Component Reference Documentation Helper to generate commands or see Publishing versioned component reference documentation for explanations. Note that not all projects follow these conventions exactly.
In the relevant project, go to Administration, then Versions. Mark the Y.Z version as 'released'. Create version Y.Z+1, if that hasn't already been done. You may also archive any deprecated releases (milestones or alphas) at this time.
The sync into central staging from repository.apache.org occurs every 4 hours. There is a separate hourly schedule that runs which pushes from staging to the other central machines, and then updates the indexes.
If the project you are releasing doesn't yet use svnpubsub for site deployment, the deployment of the Maven website will take an hour or so to sync.
If you are releasing a plugin or a shared component you can let Maven Changes Plugin generate, and eventually even send, the announcement for you. First make sure that you have configured the necessary properties in your committer settings.
cd target/checkout mvn changes:announcement-mail -Papache-release
If sending the mail should fail, the generated annoucement is available in target/annoucement (see annoucement.vm) and you can use it as a base for sending the mail manually.
If your SMTP server requires authentication you need to add the command line options for it:
cd target/checkout mvn changes:announcement-mail -Dchanges.username=<SMTP-USERNAME> -Dchanges.password=<SMTP-PASSWORD> -Papache-release
Note: You must send this email from your apache email account, e.g. YOUR_APACHE_USERNAME@apache.org otherwise the email to firstname.lastname@example.org will bounce.
From: YOUR_APACHE_USERNAME@apache.org To: email@example.com, firstname.lastname@example.org Cc: email@example.com Subject: [ANN] Apache Maven XXX Plugin Y.Z Released The Apache Maven team is pleased to announce the release of the Apache Maven XXX Plugin, version Y.Z This plugin (insert short description of the plugin's purpose). https://maven.apache.org/plugins/maven-XXX-plugin/ You should specify the version in your project's plugin configuration: <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-XXX-plugin</artifactId> <version>Y.Z</version> </plugin> You can download the appropriate sources etc. from the download page: https://maven.apache.org/plugins/maven-XXX-plugin/download.cgi Release Notes - Maven XXX Plugin - Version Y.Z (Copy Here Release Notes in Text Format from JIRA) Enjoy, -The Apache Maven team
Several projects follow this list, and should be made aware of changes to the common parent. This might also be a step to take if other shared resources are released, or if plugin releases are of particular interest to that group.