don't raise error when required extensions are not found when installing extensions in parallel

[boegel]

Raising an error effectively makes it impossible to use --parallel-extensions-install on bundle easyconfigs like R-bundle-CRAN-2024.06-foss-2023b.eb and R-bundle-Bioconductor-3.18-foss-2023a-R-4.3.2.eb.

There's actually no reason to give up when extensions that are required dependencies for an extension that will be installed are not included in exts_list, since they're probably provided via a dependency like R or R-bundle-CRAN.
Note that this is exactly what we do currently when installing extensions sequentially...

If a dependency of a particular extension is totally missing, the installation of that extension will fail as it does when installing sequentially.

Note: for using --parallel-extensions-install on R-bundle-CRAN (or older R easyconfigs that include Rmpi and Rserve), an additional bug fix is required, see:

• add missing return for customised install_extension_async methods in Rserve and Rmpi easyblocks easybuild-easyblocks#3474

[boegel]

Hmm, this is not enough, since eventually things will get stuck because no new extensions are being picked up anymore, need to check why that's happening:

Not installing extensions (yet) ━━━━━╸━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3:19:20

[boegel]

This seems to be working well now with eb R-bundle-Bioconductor-3.18-foss-2023a-R-4.3.2.eb --parallel-extensions-install --experimental, but it does seem to reveal a bug:

ERROR: Shell command failed!
    full command              ->  tar --wildcards --extract --file /data/gent/400/vsc40023/EasyBuild/sources/r/R-bundle-Bioconductor/extensions/RcisTarget_1.22.0.tar --to-stdout '*/DESCRIPTION'
    exit code                 ->  2
    working directory         ->  /tmp/vsc40023/easybuild-framework
    output (stdout + stderr)  ->  /tmp/eb-4106xvti/run-shell-cmd-output/tar-9e1hczim/out.txt
    called from               ->  'required_deps' function in /user/gent/400/vsc40023/easybuild/eb5/easybuild-easyblocks/easybuild/easyblocks/generic/rpackage.py (line 227)

There's no DESCRIPTION file in the RcisTarget source tarball, and we fail hard on that, we probably shouldn't...

The issue is that the DESCRIPTION file is not in a subdirectory in RcisTarget_1.22.0.tar , so tar xfv RcisTarget_1.22.0.tar --to-stdout DESCRIPTION does work just fine.

Always using --to-stdout *DESCRIPTION works too, so I'll strip out the / preceding DESCRIPTION...
edit: done in easybuilders/easybuild-easyblocks#3490

[boegel]

Extensive test report coming up with R-bundle-CRAN-2024.06-foss-2023b.eb + R-bundle-Bioconductor-3.19-foss-2023b-R-4.4.1.eb in easybuilders/easybuild-easyblocks#3490 ...

[boegel]

Extensive test report for bundles of R packages on top of this is available at easybuilders/easybuild-easyblocks#3490 (comment), which shows this is good to go...