Streamlining matrix builds

I’m interested in streamlining matrix builds that include Linux and MacOS.

Currently, msys2/setup-msys2 fails on non-Windows platforms. It would be nice if there was an option to not fail and instead do nothing. This would mean I don’t have to conditionally perform the installation.

Additionally, having an extra msys2do shell command which internally runs msys2 -c <cmd> on Windows and runs <cmd> directly everywhere else also helps.

[iamFIREcracker]

FYI, in a custom action of mine I ended up creating a bash-or-msys2 symlink pointing to bash on Linux / Mac OS, and msys2.cmd on Windows; thanks to that, and the fact that I used it as shell parameter for some of my action steps (i.e. shell: bash-or-msys2 {0}), I saved myself from duplicating a bunch of steps simply because it’s still not possible to inject shell to composite action (see: that https://github.com/actions/runner/issues/835).

    - name: Create bash-or-msys2
      shell: bash
      run: |
        if [[ "$RUNNER_OS" == "Windows" ]]; then
            powershell New-Item -ItemType SymbolicLink \
              -Path  "D:/a/_temp/setup-msys2/bash-or-msys2.cmd" \
              -Target "D:/a/_temp/setup-msys2/msys2.cmd"
        else
            sudo ln -sf $(which bash) /usr/local/bin/bash-or-msys2
        fi
        ...
    - name: Upgrade ASDF to the Latest Version
      shell: bash-or-msys2 {0}
      run: |
        if [[ "${{ inputs.asdf-version }}" != "latest" ]]; then
            echo ::group::Installing ASDF ${{ inputs.asdf-version }}
            ros install asdf/${{ inputs.asdf-version }}
        else
            echo ::group::Installing latest ASDF
            ros install asdf
        fi
        echo ::endgroup::

Hope it helps!

[eine]

Option platform-check-severity was added in v2.6.0. See #172 and https://github.com/msys2/setup-msys2/blob/master/CHANGELOG.md#260---20211103.