mirror of
https://github.com/digital-asset/daml.git
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The main reason for doing this is that it saves us the trouble of having to backport changes, e.g., a newer MacOS toolchain.
47 lines
1.4 KiB
Markdown
47 lines
1.4 KiB
Markdown
# How to upgrade packages in this repo
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## Stackage
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To update the Stackage snapshot you need to clone the hazel repository into a
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separate directory:
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```
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$ git clone https://github.com/tweag/rules_haskell.git
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```
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Change into the hazel directory.
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```
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$ cd rules_haskell/hazel
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```
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Then execute the following command to update to the specified Stackage
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snapshot, where `$PROJECT` points to the root of this repository:
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(Requires `stack`)
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```
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$ Stackage.hs lts-12.4 "$PROJECT/hazel/packages.bzl"
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```
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On NixOS you may need to modify `Stackage.hs` to append the following flag to
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the list of `stack` intrepreter flags: `--nix-packages zlib`.
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This will take a while.
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## Nixpkgs
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To update the nixpkgs revision, find a commit in nixkgs-unstable from
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https://github.com/NixOS/nixpkgs-channels/commits/nixpkgs-unstable and
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use it in the `rev` field in `nix/nixpkgs/default.src.json`. Set the
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`sha256` to a dummy hash, e.g., 64 zeros and run `nix-build -A tools
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-A cached nix` and nix will tell you the correct hash.
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After upgrading the revision, the easiest solution is usually to open
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a PR and see what fails on CI (running the builds locally can take
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quite some time). The most common reason for failures is usually that
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we have overriden a specific package with certain patches that no
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longer work. In that case, a good first step is to check if these
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patches are still necessary and if not try to switch to the unpatched
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package from nixpkgs.
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