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This document holds some useful information for developing Happy.

CI on GitHub Actions

2021-07-14

The GHC workflow file .github/workflows/haskell-ci.yml is generated by:

haskell-ci regenerate
patch --input=.github/haskell-ci.patch .github/workflows/haskell-ci.yml

The patch introduces happy specifics to the build and test process that are not covered by a vanilla instance of the haskell-ci workflow.

When new GHC versions become available, CI can be updated by

  • adding these versions to the tested-with field in happy.cabal (possibly removing obsolete minor versions)

  • generate the haskell-ci.yml by the steps above.

This should work as long as haskell-ci does not change its generated workflow too much. Otherwise, the patch might not apply cleanly and the workflow has to be patched manually.