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nix/haskell-packages: replace IFD with importing generated files #1220

Merged
merged 2 commits into from
Feb 19, 2020
Merged

nix/haskell-packages: replace IFD with importing generated files #1220

merged 2 commits into from
Feb 19, 2020

Commits on Feb 19, 2020

  1. nix/haskell-packages: replace IFD with importing generated files 

    Replace IFD calls to callCabal2nix with importing generated
`default.nix` files.

The generated `default.nix` files are stored in the repository and
contain instructions on how to regenerate them.

The generation of the `default.nix` files is done using the
`haskellSrc2nixWithDoc` function which generates a directory
containing a `default.nix` which is the result of running `cabal2nix`
with the `extraCabal2nixOptions` on the provided `src`. A header is
then added to the `default.nix` which contains instructions on how to
regenerate that file.

Finally the new jobs are added which check that the stored
`default.nix` matches the expected `default.nix`. So whenever the
`.cabal` files are updated and don't match the stored `default.nix`
anymore CI will complain.
    @basvandijk
    basvandijk committed Feb 19, 2020
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  2. Building.md: add a note about Updating Haskell Packages

    @basvandijk
    basvandijk committed Feb 19, 2020
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