Ivy main/standalone: Patch to include 'makepom' function

[aanno]

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Hello,

I added the pomfile option to main/standalone. This allows creating an (maven) pom file from outside an ant task.

Example of use:

$ pwd
~/.ivy2/cache/org.typelevel/cats-core_2.11
$ java -jar ~/scm/github/ant-ivy/build/artifact/org.apache.ivy_2.5.0.alpha_20180327212209.jar -ivy ivy-1.0.1.xml -pomfile cats-core.xml
$ ls
cats-core-2.11.xml  ivy-1.0.1.xml  ivy-1.0.1.xml.original  ivydata-1.0.1.properties  jars  srcs

Feedback is welcome. What should I do to get this patch into mainline?

Kind regards,

aanno

[jaikiran]

@aanno Thank you for the patch. This mostly looks fine. I have added some review comments. Can you please also introduce a test case for this? Something that tests that these command options are recognized and the pom file does get created. There's a MainTest which you can refer to and add a new test method there.

[jaikiran]

@aanno, thank you for this PR. I have gone ahead and included your patch with minor modifications to upstream and also included a test along with it. I have also included your name in our release notes. Since I couldn't find your full name in your github profile, I used aanno, if you prefer to have your full name included in the release notes, please let me know and I'll update it accordingly.

[twogee]

@aanno could you please rebase and push the branch in order to close the PR?