Add ability to archive easyblocks

[verdurin]

Based on a question that came up at the workshop in Birmingham 2018-10-22.

[boegel]

This should go into the easybuild/reprod dir then that we already have now? Thoughts @ocaisa?

We should probably also have some dedicated documentation on how to reproduce installations done with EasyBuild?

Or maybe even drop a script into easybuild/reprod that specifies everything that's needed (--include-easyblocks=... for example)?

[ocaisa]

Definitely should go in the easybuild/reprod dir. Since the inheritance implies there will typically be a few, I'd suggest we put all the necessary easyblocks in a subdir there so that someone can just use --include-easyblocks=/.../easybuild/reprod/reprod_easyblocks/*

[ocaisa]

Hmm, I can't find any way of doing this fully. It's straightforward to get the source file for the easyblock (using inspect.getsourcefile() and get_easyblock_class()) but that is incomplete unless you follow the inheritance all the way back to the base easyblock class.

[ocaisa]

Ok, I found out how to do it:

        app_class = get_easyblock_class(easyblock, name=name)
        for easyblock_class in inspect.getmro(app_class):
            easyblock_path = inspect.getsourcefile(easyblock_class)
            if os.path.split(easyblock_path)[0].endswith(os.path.join('easybuild-framework', 'easybuild', 'framework')):
                break
            else:
                print easyblock_path

PR is in the works.

[boegel]

easyblocks are now also archived in the easybuild/reprod subdir of the installation directory thanks to @ocaisa's PR #2653