[GitHub] [maven] adamretter commented on pull request #357: Add wildcard option for direct goal execution id from command line

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adamretter commented on pull request #357:
URL: https://github.com/apache/maven/pull/357#issuecomment-637454971


   @rfscholte Okay, so this is my use-case...
   
   I am using the [license-maven-plugin](http://mycila.mathieu.photography/license-maven-plugin/) which allows me to check for and/or format license headers on source-code files. However, I think my use case is equally applicable for any other plugin.
   
   Our projects's source code uses a couple of different licenses. The license plugin enables you to configure it for a single license. Therefore, we need one execution of the plugin's `check` goal per-license that we want to enforce, and we want that bound to the `verify` lifecycle phase.
   
   Therefore we have a configuration which looks something like this:
   ```xml
   <plugin>
       <groupId>com.mycila</groupId>
       <artifactId>license-maven-plugin</artifactId>
       <version>3.0</version>
   
       <configuration>
           <failIfMissing>false</failIfMissing>
           <strictCheck>true</strictCheck>
           <excludes>
               <exclude>LGPL-21-license.template.txt</exclude>
               <exclude>DBXML-license.template.txt</exclude>
           </excludes>
           <encoding>${project.build.sourceEncoding}</encoding>
       </configuration>
   
       <executions>
   
           <!-- Check that the LGPL 2.1 license is present and correct -->
           <execution>
               <id>check-lgpl-headers</id>
               <phase>verify</phase>
               <goals>
                   <goal>check</goal>
               </goals>
               <configuration>
               	<header>${project.parent.relativePath}/LGPL-21-license.template.txt</header>
               	<excludes>
               		<exclude>src/main/java/org/exist/storage/btree/**</exclude>
               	</excludes>
               </configuration>
           </execution>
   
           <!-- Check that the DBXML license is present and correct (only on BTree files) -->
           <execution>
               <id>check-dbxml-headers</id>
               <phase>verify</phase>
               <goals>
                   <goal>check</goal>
               </goals>
               <configuration>
               	<header>${project.parent.relativePath}/DBXML-license.template.txt</header>
               	<includes>
               		<include>src/main/java/org/exist/storage/btree/**</exclude>
               	</includes>
               </configuration>
           </execution>
   
       </executions>
   </plugin>
   ```
   
   During development and testing we often want to run `mvn license:check` or even `mvn license:format` to ensure that our source code has the correct licenses. Unfortunately that only run's for the *executionId* `default-cli` which equates to  `check-lgpl-headers`, which means that not all source files are correctly checked for the appropriate license headers.
   
   Now I could indeed run `mvn license:check@check-lgpl-headers && mvn license:check@check-dbxml-headers`. But that's not very nice... and also there are actually more than two executions involved, I only showed the two to keep my example short ;-)
   
   Of course, we could just be run `mvn verify`, but we have many other plugins also bound to that lifecycle, and some of them are very slow and intensive. Also that would only execute the `check` goals, it doesn't help us with the `format` goals.
   
   With my PR, running `mvn license:check@*` does correctly run each. It in fact creates one `MojoExecution` per executionId, and for each it merges the parent config with the just the config for that specific execution, so I don't think we have problems with inheritance. 
   
   Hope that makes sense? Please let me know if I need to do a better job at explaining it...


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