CI: Add GitHub Actions ppc64le/s390x cases

[junaruga]

This PR is working in progress to add GitHub Actions Ubuntu 24.04 ppc64le/s390x cases. This is one of the tasks that we add the cases in some ruby/* repositories. The task is tracked at IBM/actionspz#4 (comment).

Maybe, this PR's change will be for only .github/workflows/ci.yml, while you see other changes in other files temporarily to work on this PR easily for now. I needed to sent a PR to this repository to test the ppc64le/s390x CI pipelines, rather than to test on my fork repository because GitHub Actions Ubuntu 24.04 ppc64le/s390x cases don't work in fork repositories unlike GitHub Actions x86_64/arm64 pipelines.

I add the new job "host-ibm", because there are ppc64le/s390x specific logic, if: github.repository == 'ruby/fiddle' and "Set up Ruby" logic installing Ruby apt package. The ruby/setup-ruby doesn't support the ppc64le/s390x cases as far as I know.

As a reference, we have applied the following code to a few ruby/* repositories.

• ruby/ruby: https://github.com/ruby/ruby/blob/master/.github/workflows/ubuntu-ibm.yml
• ruby/prism: https://github.com/ruby/prism/blob/07de61d4702d12c985d0a708445cf6f3e1935989/.github/workflows/main.yml#L81-L100
• ruby/psych: https://github.com/ruby/psych/blob/1d9c52706b2572a37248a1bdf3f83cc6ef07fd83/.github/workflows/test.yml#L64-L86
• ruby/zlib: https://github.com/ruby/zlib/blob/b2ec227080d79fb16e7df2659c8fe943b5a9452d/.github/workflows/test.yml#L45-L64

[junaruga]

This PR is ready for review. A maintainer working on this repository, could you review this PR? Thank you.

[kou]

Suggested change

	- run: rake compile
	- run: bundle exec rake compile

[junaruga]

The rake compile without bundle exec is to align the current style of the other parts. Below is the current status in the latest master branch. I can send another PR for this change including other parts later.

$ grep -rn 'rake compile' .github/workflows/
.github/workflows/ci.yml:52:      - run: rake compile
.github/workflows/libffi.yml:35:        run: rake compile -- --with-libffi-dir=${{ matrix.libffi-prefix }}
.github/workflows/libffi.yml:38:        run: rake compile -- --with-libffi-source-dir=$(pwd)/libffi-${{ matrix.libffi }}

[kou]

Suggested change

	- run: ruby -Ilib test/run.rb
	- run: bundle exec ruby -Ilib test/run.rb

[junaruga]

The ruby -Ilib test/run.rb without bundle exec is to align the current style of the other parts. Below is the current status of the latest master branch. I can send another PR for this change including other parts later.

$ grep -rn 'test/run.rb' .github/workflows/
.github/workflows/ci.yml:63:      - run: ruby -Ilib test/run.rb
.github/workflows/ci.yml:78:          ruby test/run.rb

[junaruga]

@kou Thank you for your review! I fixed some of things you mentioned. For the style of the commands without bundle exec, as I see the style in other parts in the current CI yml files, I want to send another PR applying the changes for other parts together later. Is it okay for you? Could you review this PR again? Thank you.

[kou]

OK. Let's use another PR.

[junaruga]

Thank you for merging this PR.
I see the commit 6368ee0 's commit message including this page's first comment. That was my intention. The first comment was before your reviews. So, the content is outdated for example, "Maybe, this PR's change will be for only .github/workflows/ci.yml" was my statement before your review.

[junaruga]

OK. Let's use another PR.

I sent the PR #192 for this now.

[kou]

We use the PR description as the commit message of merged commit.
Could you also update the PR description next time?

[junaruga]

We use the PR description as the commit message of merged commit. Could you also update the PR description next time?

Sure. I will keep that in mind. If I am missing adding the context of the commit into the commit message in future PRs, please let me know in the review process. I am happy to fix it.