Update and harden GitHub Actions workflows - #247
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Update actions/checkout v3 → v6.0.2 and 8398a7/action-slack v3 → v3.19.0, pinning both to their exact commit SHAs to prevent supply chain attacks. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ubuntu-20.04 is EOL; switch slack and hex publish jobs to ubuntu-latest (currently ubuntu-24.04) to stay on a supported runner. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- CI matrix: add OTP 26, 27, 28 (latest stable; OTP 29 is still RC) - hex publish: update pinned image from erlang:23.2.5.0-alpine to erlang:27-alpine Current latest patch per major (as of 2026-04): 22 → 22.3.4.27, 23 → 23.3.4.20, 24 → 24.3.4.16 25 → 25.3.2.11, 26 → 26.2.5, 27 → 27.3.4, 28 → 28.4.1 OTP 27 is used for hex publish as the latest proven-stable series; OTP 28 can be promoted once the ecosystem has wider adoption. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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RoadRunnr
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April 1, 2026 07:01
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Apr 1, 2026
vkatsuba
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Apr 1, 2026
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Summary
Modernise all GitHub Actions workflow files: pin actions to commit SHAs for supply-chain security, update runner images, and expand the OTP test matrix.
Changes
Actions — version updates + SHA pinning
main.yml,hex.yamlactions/checkoutv3v6.0.2de0fac2e4500dabe0009e67214ff5f5447ce83ddmain.yml8398a7/action-slackv3v3.19.077eaa4f1c608a7d68b38af4e3f739dcd8cba273eAll
uses:references are now pinned to their exact commit SHA with the version tag as a comment. This prevents a compromised or force-pushed tag from silently swapping the action code.Runner images
main.ymlslackubuntu-20.04(EOL)ubuntu-latesthex.yamlpublishubuntu-20.04(EOL)ubuntu-latestErlang/OTP container versions
main.ymlmatrix[22, 23, 24, 25][22, 23, 24, 25, 26, 27, 28]hex.yamlcontainererlang:23.2.5.0-alpineerlang:27-alpineCurrent latest patch per major (as of 2026-04):
22.3.4.27·23.3.4.20·24.3.4.16·25.3.2.11·26.2.5·27.3.4·28.4.1Test plan
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