ci: use cpanm for multi-version Linux matrix#135
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The install-with-cpm action uses cpm which requires Perl 5.24+, causing CI failures on Perl 5.8–5.22 (the CPAN MetaDB 404 issue was actually cpm refusing to run on old Perls). Replace with direct cpanm commands that work on all Perl versions: - Required deps via --installdeps (fails build if broken) - Recommended deps (DBI, Math::BigInt::GMP, etc.) as best-effort Supersedes garu#133. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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What
Replace
install-with-cpmaction with directcpanmcommands in the multi-version Linux matrix job.Why
cpmrequires Perl 5.24+ to run, causing theinstall depsstep to fail on Perl 5.8–5.22 with:This has been breaking CI for all PRs on old Perl versions. Bumping to
install-with-cpm@v2(PR #133) doesn't help —cpmitself has the version requirement.How
cpanm --installdepsfor required deps (fails the build if broken)|| truesince they're optionalPERL5LIBstep —cpanmin Docker containers installs to system paths (running as root)install-with-cpmsince they use Perl 5.30+Supersedes #133.
Testing
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