I often find myself in front of a POM scratching my head while trying to find what Maven will execute during my build. Since Maven 3 it is possible to calculate execution plan by simulating the build. Strangely there is not easy way do display it. Here is buildplan-maven-plugin.
Configuration
To easily use the plugin, add its groupId in your Maven configuration (ie settings.xml):
<pluginGroups>
<pluginGroup>fr.jcgay.maven.plugins</pluginGroup>
</pluginGroups>Show build plan
It is possible to list goals executed during a build. The simulated phase is deploy.
> mvn buildplan:list
[INFO] --- buildplan-maven-plugin:1.0:list (default-cli) @ maven-notifier ---
[INFO] ----------------------------------------------------------------------------------------------
[INFO] PLUGIN | PHASE | ID | GOAL
[INFO] ----------------------------------------------------------------------------------------------
[INFO] maven-resources-plugin | process-resources | default-resources | resources
[INFO] maven-compiler-plugin | compile | default-compile | compile
[INFO] plexus-component-metadata | process-classes | default | generate-metadata
[INFO] maven-resources-plugin | process-test-resources | default-testResources | testResources
[INFO] maven-compiler-plugin | test-compile | default-testCompile | testCompile
[INFO] maven-surefire-plugin | test | default-test | test
[INFO] maven-dependency-plugin | process-sources | get-logging-binding | copy
[INFO] maven-jar-plugin | package | default-jar | jar
[INFO] maven-shade-plugin | package | default | shade
[INFO] maven-assembly-plugin | | make-assembly | single
[INFO] maven-source-plugin | package | default | jar-no-fork
[INFO] maven-install-plugin | install | default-install | install
[INFO] maven-deploy-plugin | deploy | default-deploy | deploy
Show phases
A view per phase is available. This way, we can quickly see which plugins are used during a phase.
> mvn buildplan:list-phase
[INFO] --- buildplan-maven-plugin:1.0:list-phase (default-cli) @ maven-notifier ---
[INFO] install --------------------------------------------------------------------
[INFO] + maven-install-plugin | default-install | install
[INFO] process-resources ----------------------------------------------------------
[INFO] + maven-resources-plugin | default-resources | resources
[INFO] process-sources ------------------------------------------------------------
[INFO] + maven-dependency-plugin | get-logging-binding | copy
[INFO] test -----------------------------------------------------------------------
[INFO] + maven-surefire-plugin | default-test | test
[INFO] test-compile ---------------------------------------------------------------
[INFO] + maven-compiler-plugin | default-testCompile | testCompile
[INFO] process-test-resources -----------------------------------------------------
[INFO] + maven-resources-plugin | default-testResources | testResources
[INFO] process-classes ------------------------------------------------------------
[INFO] + plexus-component-metadata | default | generate-metadata
[INFO] compile --------------------------------------------------------------------
[INFO] + maven-compiler-plugin | default-compile | compile
[INFO] default-phase --------------------------------------------------------------
[INFO] + maven-assembly-plugin | make-assembly | single
[INFO] package --------------------------------------------------------------------
[INFO] + maven-jar-plugin | default-jar | jar
[INFO] + maven-shade-plugin | default | shade
[INFO] + maven-source-plugin | default | jar-no-fork
[INFO] deploy ---------------------------------------------------------------------
[INFO] + maven-deploy-plugin | default-deploy | deploy
Filtering phase using parameter buildplan.phase:
mvn buildplan:list-phase -Dbuildplan.phase=test
Show plugins
In this cas, executions are grouped by plugin.
> mvn buildplan:list-plugin
[INFO] --- buildplan-maven-plugin:1.0:list-plugin (default-cli) @ maven-notifier ---
[INFO] maven-deploy-plugin -----------------------------------------------------
[INFO] + deploy | default-deploy | deploy
[INFO] maven-source-plugin -----------------------------------------------------
[INFO] + package | default | jar-no-fork
[INFO] maven-assembly-plugin ---------------------------------------------------
[INFO] + | make-assembly | single
[INFO] maven-dependency-plugin -------------------------------------------------
[INFO] + process-sources | get-logging-binding | copy
[INFO] maven-resources-plugin --------------------------------------------------
[INFO] + process-resources | default-resources | resources
[INFO] + process-test-resources | default-testResources | testResources
[INFO] maven-jar-plugin --------------------------------------------------------
[INFO] + package | default-jar | jar
[INFO] maven-shade-plugin ------------------------------------------------------
[INFO] + package | default | shade
[INFO] maven-surefire-plugin ---------------------------------------------------
[INFO] + test | default-test | test
[INFO] maven-compiler-plugin ---------------------------------------------------
[INFO] + compile | default-compile | compile
[INFO] + test-compile | default-testCompile | testCompile
[INFO] maven-install-plugin ----------------------------------------------------
[INFO] + install | default-install | install
[INFO] plexus-component-metadata -----------------------------------------------
[INFO] + process-classes | default | generate-metadata
The parameter buildplan.plugin allow specific plugin filtering:
mvn buildplan:list-plugin -Dbuildplan.plugin=maven-compiler-plugin
This is it, your build plan will have no secret for you anymore !