Add a basic Maven plugin to run the Transformer

[jgallimore]

This will likely need some rework and tweaking, but thought I'd open this, and push further commits to it as necessary. This PR provides a basic Maven plugin. To use it, you'll need to at least push it to your local Maven repository on your machine, which you can achieve by running

./gradlew -i build
./gradlew -i publishToMavenLocal

To test is with a simple Maven project that builds a .war file, on your Maven project, you can run something like this:

mvn clean install org.eclipse.transformer:transformer-maven-plugin:0.1.0-SNAPSHOT:run

and you should see the Transformer run after the .war file is created:

[INFO] 
[INFO] --- maven-war-plugin:3.1.0:war (default-war) @ moviefun ---
[INFO] Packaging webapp
[INFO] Assembling webapp [moviefun] in [/home/jgallimore/dev/tomee/examples/moviefun/target/moviefun]
[INFO] Processing war project
[INFO] Copying webapp resources [/home/jgallimore/dev/tomee/examples/moviefun/src/main/webapp]
[INFO] Webapp assembled in [32 msecs]
[INFO] Building war: /home/jgallimore/dev/tomee/examples/moviefun/target/moviefun.war
[INFO] 
[INFO] --- maven-install-plugin:2.4:install (default-install) @ moviefun ---
[INFO] Installing /home/jgallimore/dev/tomee/examples/moviefun/target/moviefun.war to /home/jgallimore/.m2/repository/org/superbiz/moviefun/8.0.2-SNAPSHOT/moviefun-8.0.2-SNAPSHOT.war
[INFO] Installing /home/jgallimore/dev/tomee/examples/moviefun/pom.xml to /home/jgallimore/.m2/repository/org/superbiz/moviefun/8.0.2-SNAPSHOT/moviefun-8.0.2-SNAPSHOT.pom
[INFO] 
[INFO] --- transformer-maven-plugin:0.1.0-SNAPSHOT:run (default-cli) @ moviefun ---
Logger name [ Transformer ] (Defaulted)
Log file [ null ]
[INFO] Input     [ /home/jgallimore/dev/tomee/examples/moviefun/target/moviefun.war ]
[INFO]           [ /home/jgallimore/dev/tomee/examples/moviefun/target/moviefun.war ]
[INFO] Output    [ /home/jgallimore/dev/tomee/examples/moviefun/target/output_moviefun.war ] (Generated from input)
[INFO]           [ /home/jgallimore/dev/tomee/examples/moviefun/target/output_moviefun.war ]
[INFO] Skipping option [ RULES_SELECTIONS ]
[INFO] Internal [ RULES_RENAMES ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-renames.properties ]
[INFO] Internal [ RULES_VERSIONS ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-versions.properties ]
[INFO] Internal [ RULES_BUNDLES ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-bundles.properties ]
[INFO] Internal [ RULES_DIRECT ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-direct.properties ]
[INFO] Internal [ RULES_MASTER_XML ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-xml.properties ]
[INFO] All resources will be selected
[INFO] Package renames are in use
[INFO] Package versions will be updated
[INFO] Bundle identities will be updated
[INFO] Internal [ Substitions matching [ server.xml ] ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-xml-server.properties ]
[INFO] Internal [ Substitions matching [ *.xml ] ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-xml-all.properties ]
[INFO] Internal [ Substitions matching [ web.xml ] ] URL [ jar:file:/home/jgallimore/.m2/repository/org/eclipse/transformer/transformer/0.1.0-SNAPSHOT/transformer-0.1.0-SNAPSHOT.jar!/com/ibm/ws/jakarta/transformer/jakarta-xml-web.properties ]
[INFO] XML files will be updated
[INFO] Java direct string updates will not be performed
[INFO] Action selected for input [ /home/jgallimore/dev/tomee/examples/moviefun/target/moviefun.war ]: WAR Action
[INFO] Input [ /home/jgallimore/dev/tomee/examples/moviefun/target/moviefun.war ] as [ /home/jgallimore/dev/tomee/examples/moviefun/target/output_moviefun.war ]: Changed
[INFO] [          All Resources ] [     34 ] Unselected [      0 ] Selected [     34 ]
[INFO] [            All Actions ] [     34 ]  Unchanged [     31 ]  Changed [      3 ]
[INFO] [       Nested Resources ] [    148 ] Unselected [      0 ] Selected [    148 ]
[INFO] [         Nested Actions ] [    148 ]  Unchanged [    148 ]  Changed [      0 ]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  35.658 s
[INFO] Finished at: 2020-04-20T17:26:23+01:00
[INFO] ------------------------------------------------------------------------

I would very much appreciate any feedback on this. Many thanks!

[tbitonti]

Added the standard copyright header to TransformMojo.java. Don't know if the build files need copyrights, so I left them alone.

[jgallimore]

Is there anything that I need to do to get this merged? Not a problem at all if its just a matter of time. If I need to do anything, I'm happy to help.

[jgallimore]

Hold off doing anything with this - there are currently some issues I'm trying to resolve, specifically with the reference to biz.aQute.bnd:biz.aQute.bnd.transform:5.1.0-SNAPSHOT artifact in the jfrog repository, and changes to where the rules files are.