See JEP-305 for context.
Since most Jenkins repositories host plugins, this use case will be documented first. You must be using parent POM version 3.10 or later.
Just run
mvn io.jenkins.tools.incrementals:incrementals-maven-plugin:incrementalify -DgenerateBackupPoms=false
or if your POM is already new enough (3.10+)
mvn incrementals:incrementalify
Check the usual build
mvn clean package
and if all is well,
git add .mvn pom.xml
git checkout -b incrementals
git commit -m Incrementalified.
and file as a pull request.
If your plugin has (or may have) dependencies on incremental versions, run:
mkdir -p .mvn
echo -Pconsume-incrementals >> .mvn/maven.config
git add .mvn
(See this guide for details on the .mvn
directory.)
This profile merely activates access to the Incrementals repository.
To produce incremental artifacts from your plugin, first edit your pom.xml
.
If your plugin declares
<version>1.23-SNAPSHOT</version>
then replace that with
<version>${revision}${changelist}</version>
and then in the <properties>
section add
<revision>1.23</revision>
<changelist>-SNAPSHOT</changelist>
If you have a multimodule reactor build, the new properties
need be defined only in the root POM,
but every child POM should use the edited version
to refer to its parent
.
(It should not override the version
.)
Intermodule dependency
es may use ${project.version}
to refer to the version
of the sibling.
Also change
<scm>
<!-- … -->
<tag>HEAD</tag>
</scm>
to
<scm>
<!-- … -->
<tag>${scmTag}</tag>
</scm>
Also replace jenkinsci/your-repo
occurrences in the scm
section with a POM property named gitHubRepo
.
This will ensure that deployments from forked pull requests will give correct checkout information,
used for example by plugin-compat-tester
.
Now run
mkdir -p .mvn
echo -Pmight-produce-incrementals >> .mvn/maven.config
Finally, configure git-changelist-maven-extension
in .mvn/extensions.xml
. (Update the version to the latest version for this tool.):
<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 http://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
<extension>
<groupId>io.jenkins.tools.incrementals</groupId>
<artifactId>git-changelist-maven-extension</artifactId>
<version>1.0-beta-7</version>
</extension>
</extensions>
You may now
git add .mvn pom.xml
and commit and push your edits.
A single plugin may both consume Incrementals releases, and produce its own.
Just make both kinds of edits.
(.mvn/maven.config
may have multiple lines.)
Assumes you have set up the might-produce-incrementals
as above, either by hand or using the incrementalify
goal.
If you file a pull request built on ci.jenkins.io,
and the pull request is up to date with its target branch,
and the build is stable,
the artifact will be automatically deployed to the Incrementals repository.
Your plugin will need to have a github
field in
repository-permissions-updater
if it does not already.
To check from a shell if your deployment is ready, get the gh
CLI and try:
$ gh pr checks | fgrep incrementals | awk '{print $4}'
https://repo.jenkins-ci.org/incrementals/org/jenkins-ci/plugins/ldap/1.27-rc474.9577fe6b8ea6/
To produce equivalent artifacts in your local repository while working offline:
mvn -Dset.changelist -DskipTests clean install
If you do not select the -Dset.changelist
option, you will create a regular *-SNAPSHOT
artifact.
(And that is what you must do if you have any local modifications or untracked files.)
Once you have some dependencies on incremental versions in your POM, you can
mvn incrementals:update
to get a newer version of some dependencies, if merged; or
mvn incrementals:update -Dbranch=yourghacct:experiments-JENKINS-12345
to get the most recent versions from some set of unmerged PRs.
Then commit and push the resulting pom.xml
edits.
You will need GitHub credentials for this: instructions
Official Jenkins Docker images offer plugins.txt
which supports Incrementals.
See this page for more information.
Incrementals maven plugin can be used to update plugin versions there.
Currently, only Incrementals version update is supported.
mvn incrementals:updatePluginsTxt -DpluginsFile=plugins.txt
When plugins.txt format is used, it is also possible to pass the branch name to the incrementals definition so that the Incrementals version is updated from a particular branch.
Example of the file with incrementals:
scm-api:latest
script-security:latest
workflow-aggregator:2.5
# https://github.com/jenkinsci/workflow-api-plugin/pull/17
workflow-api:incrementals;org.jenkins-ci.plugins.workflow;2.30-rc-802-fa-5-alpha-94-c-8-alpha-65;jglick;logs-JENKINS-38381
workflow-basic-steps:latest
# https://github.com/jenkinsci/workflow-durable-task-step-plugin/pull/21
workflow-durable-task-step:incrementals;org.jenkins-ci.plugins.workflow;jglick;2.20-rc333.74dc7c303e6d
# https://github.com/jenkinsci/workflow-job-plugin/pull/27
workflow-job:incrementals;org.jenkins-ci.plugins.workflow;2.25-rc-824.49-c-91-cd-14666;jglick;logs-JENKINS-38381
workflow-multibranch:latest
# https://github.com/jenkinsci/workflow-support-plugin/pull/15
workflow-support:incrementals;org.jenkins-ci.plugins.workflow;2.21-rc-617.27-alpha-34-dc-2-c-64-c;jglick;logs-JENKINS-38381
# Incrementals from the master branch
artifact-manager-s3:incrementals;io.jenkins.plugins;1.2-rc82.a1e113b09b19
You may still use the Maven release plugin (MRP) when might-produce-incrementals
is activated:
mvn -B release:{prepare,perform}
The released artifacts should have sensible metadata. (You may notice that they deploy a “flattened” POM file, but this should not break anything.)
Sufficiently recent parent POMs (3.18+) also include a incrementals:reincrementalify
mojo
run as part of completion goals,
so you will notice that the [maven-release-plugin] prepare for next development iteration
commit
brings your source tree back to a state where the plugin is ready to produce Incrementals.
To verify that this is working, after running a release try running
git diff HEAD^^
You should see something like
--- a/pom.xml
+++ b/pom.xml
<version>${revision}${changelist}</version>
<properties>
- <revision>1.1</revision>
+ <revision>1.2</revision>
<changelist>-SNAPSHOT</changelist>
</properties>
indicating that the net effect of the [maven-release-plugin] prepare release something-1.1
commit and the commit after it
is to change the plugin from 1.1-SNAPSHOT
to 1.2-SNAPSHOT
.
If this failed and your <version>
was still a number, you can manually run
mvn incrementals:reincrementalify
to fix it up.
If you want to use Incrementals instead of MRP,
you can override changelist.format
in your project (the default value is -rc%d.%s
).
For a regular component whose version number is not intrinsically meaningful:
--- a/.mvn/extensions.xml
+++ b/.mvn/extensions.xml
@@ -2,6 +2,6 @@
<extension>
<groupId>io.jenkins.tools.incrementals</groupId>
<artifactId>git-changelist-maven-extension</artifactId>
- <version>1.0-beta-7</version>
+ <version>1.1</version>
</extension>
</extensions>
--- a/.mvn/maven.config
+++ b/.mvn/maven.config
@@ -1,2 +1,3 @@
-Pconsume-incrementals
-Pmight-produce-incrementals
+-Dchangelist.format=%d.v%s
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
- <version>${revision}${changelist}</version>
+ <version>${changelist}</version>
<packaging>hpi</packaging>
@@ -26,8 +26,7 @@
<properties>
- <revision>1.23</revision>
- <changelist>-SNAPSHOT</changelist>
+ <changelist>999999-SNAPSHOT</changelist>
<jenkins.version>2.176.4</jenkins.version>
<java.level>8</java.level>
</properties>
Here a CI/release build (-Dset.changelist
specified) will be of the form 123.vabcdef456789
.
A snapshot build will be 999999-SNAPSHOT
: arbitrary but treated as a snapshot by Maven and newer than any release.
For a component whose version number ought to reflect a release version of some wrapped component:
--- a/.mvn/extensions.xml
+++ b/.mvn/extensions.xml
@@ -2,6 +2,6 @@
<extension>
<groupId>io.jenkins.tools.incrementals</groupId>
<artifactId>git-changelist-maven-extension</artifactId>
- <version>1.0-beta-7</version>
+ <version>1.1</version>
</extension>
</extensions>
--- a/.mvn/maven.config
+++ b/.mvn/maven.config
@@ -1,2 +1,3 @@
-Pconsume-incrementals
-Pmight-produce-incrementals
+-Dchangelist.format=%d.v%s
--- a/pom.xml
+++ b/pom.xml
@@ -10,12 +10,12 @@
<artifactId>some-library-wrapper</artifactId>
- <version>${revision}${changelist}</version>
+ <version>${revision}-${changelist}</version>
<packaging>hpi</packaging>
<properties>
- <revision>4.0.0-1.3</revision>
- <changelist>-SNAPSHOT</changelist>
+ <revision>4.0.0</revision>
+ <changelist>999999-SNAPSHOT</changelist>
<jenkins.version>2.176.4</jenkins.version>
<java.level>8</java.level>
Here the version numbers will look like 4.0.0-123.vabcdef456789
or 4.0.0-999999-SNAPSHOT
, respectively.
When you pick up a new third-party component like 4.0.1
, your version numbers will match;
to refer to the third-party component, just use
<version>${revision}</version>
Since inadvertently running MRP on such a project would result in a mess,
it is best to explicitly prevent that.
This is done automatically by the plugin and general component parent POMs
when you define the changelist.format
property.
If you have configured changelist.format
as above,
using JEP-229 you can then set up automatic publishing of artifacts.
First, file a patch to your component’s entry(ies) in RPU to add
cd:
enabled: true
Once that has been merged, start checking https://github.com/jenkinsci/your-plugin/settings/secrets/actions
and you should soon see MAVEN_TOKEN
and MAVEN_USERNAME
appear under Repository secrets.
Next, if you already have Release Drafter configured,
remove any tag-template
override in .github/release-drafter.yml
,
and delete .github/workflows/release-drafter.yml
if using GitHub Actions (or remove the app from the repo otherwise).
If you have not yet configured Release Drafter, just create .github/release-drafter.yml
containing only
_extends: .github
Now create .github/workflows/cd.yaml
as follows:
name: cd
on:
workflow_dispatch:
check_run:
types:
- completed
jobs:
deploy:
runs-on: ubuntu-latest
steps:
- name: Verify CI status
uses: jenkins-infra/verify-ci-status-action@v1.1.0
with:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Release Drafter
uses: release-drafter/release-drafter@v5.13.0
with:
name: next
tag: next
version: next
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Check out
uses: actions/checkout@v2.3.4
with:
fetch-depth: 0
- name: Set up JDK 8
uses: actions/setup-java@v1
with:
java-version: 1.8
- name: Release
uses: jenkins-infra/jenkins-maven-cd-action@v1.1.0
with:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
MAVEN_TOKEN: ${{ secrets.MAVEN_TOKEN }}
Now whenever Jenkins reports a successful build of your default branch,
and at least one pull request had a label indicating it was of interest to users (e.g. enhancement
rather than chore
),
your component will be released to Artifactory and release notes published in GitHub.
You do not need any special credentials or local checkout;
just merge pull requests with suitable titles and labels.
You can also trigger a deployment explicitly, if the current commit has a passing check from Jenkins.
Visit https://github.com/jenkinsci/your-plugin/actions?query=workflow%3Acd
and click Run workflow.
If you prefer to only deploy explicitly, not on every push, just comment out the check_run
section above.
(Do not be alarmed to see numerous failed cd
workflows besides the passing ones that actually deployed:
every check posted other than the top-level Jenkins
check triggers a workflow which should quickly fail.)
As a fallback, you can also release manually if you have personal deployment credentials. To cut a release:
git checkout master
git pull --ff-only
mvn -Dset.changelist -DaltDeploymentRepository=maven.jenkins-ci.org::default::https://repo.jenkins-ci.org/releases/ clean deploy
From repositories with POMs not inheriting from org.jenkins-ci.plugins:plugin
you can follow similar steps to use Incrementals.
If you inherit from org.jenkins-ci:jenkins
, the same profiles are available;
otherwise you will need to copy the definitions of the consume-incrementals
, might-produce-incrementals
, and produce-incrementals
profiles from org.jenkins-ci:jenkins
,
as well as the incrementals.url
and scmTag
properties,
into your parent POM or directly into your repository POM.
Some adjustment of maven-enforcer-plugin
configuration may also be necessary.
Once Incrementals is enabled in a plugin repository,
the stock buildPlugin
method takes care of publishing artifacts from stable builds up to date with the base branch.
For libraries or other components with custom Jenkinsfile
s, you will need to set this up manually:
node('maven') {
checkout scm
sh 'mvn -Dset.changelist install'
infra.prepareToPublishIncrementals()
}
infra.maybePublishIncrementals()
If you wish to test usage offline, run
docker run --rm --name nexus -p 8081:8081 -v nexus-data:/nexus-data sonatype/nexus3
Log in to http://localhost:8081/ and pick an admin password as per instructions, then
add to your ~/.m2/settings.xml
:
<servers>
<server>
<id>incrementals</id>
<username>admin</username>
<password>admin123</password>
</server>
</servers>
and then add to command lines consuming or producing incremental versions:
-Dincrementals.url=http://localhost:8081/repository/maven-releases/
or define an equivalent profile in local settings.
See GitHub releases.
2018 Sep 04
mvn incrementals:update
mishandled property expressions.
2018 Aug 30
- New
mvn incrementals:updatePluginsTxt
goal.
2018 Jul 24
- Support
mvn incrementals:incrementalify
on projects using theorg.jenkins-ci:jenkins
parent.
2018 Jul 19
- JENKINS-51869: no longer using
--first-parent
in revision count. - Match indentation in
mvn incrementals:incrementalify
. - Make
mvn incrementals:reincrementalify
fail comprehensibly on a non-incrementalified repository.
Not recorded.