Spack package for UM vn7.3

[penguian]

Closes issue #70. This is an initial Spack package for UM vn7.3, as a dependency of ACCESS-ESM1.5. See also issue #59.

Builds and installs as um7%intel. There is also an optional um7%oneapi but this has not yet been tested, and is not expected to work at the moment. See this comment to issue #59 for a possible extension to support gcc compilers.

[penguian]

Converted to draft while testing the oneapi build, and while waiting for the pull request on UM_v7 to be resolved.

[harshula]

Reviewed in VC. Also get @rxy900 's feedback.

[penguian]

Testing the debug build with each of the following three variant syntaxes:

$ spack install um7 [email protected]%intel
$ spack install [email protected] opt=debug%intel
$ spack install [email protected]%intel opt=debug

consistently fails with the following Spack internal error:

==> Error: Spack concretizer internal error. Please submit a bug report and include the command, environment if applicable and the following error message.
    [email protected]=0-git.682%intel opt=debug is unsatisfiable, errors are:
    internal_error("Reuse version weight used for build package")
    internal_error("imposed hash without imposing all variant values")
    internal_error("must choose a single version to satisfy version constraints")
    internal_error("version weights must exist and be unique")

This appears to be caused by a known issue in Spack itself: spack/spack#38484
See also ACCESS-NRI/ACCESS-OM2#15

[penguian]

The failure above is worked around by temporarily adding the following line to packages/um7/package.py:
After

    version("7.3")

add

    version("7.3-working", branch="4-create-a-working-debug-build")

This allows the following commands to succeed:

$ spack install [email protected]%intel
$ spack install [email protected]%intel opt=debug

I have not pushed this temporary change.

[access-hive-bot]

This pull request has been mentioned on ACCESS Hive Community Forum. There might be relevant details there:

https://forum.access-hive.org.au/t/can-we-allow-rui-yang-to-review-pull-requests-for-access-nri-spack-packages/2054/1

[penguian]

Hi @rxy900 Please review this merge request.

[penguian]

Thanks @rxy900 for the approval. I am also still waiting for your review of https://github.com/ACCESS-NRI/UM_v7/pull/5 to allow opt=debug to work.

[penguian]

Merging now.