https://github.com/google/cabal2bazel

Haskell Bazel rules and cabal2bazel import tool.
https://github.com/google/cabal2bazel

Last synced: about 1 month ago
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Haskell Bazel rules and cabal2bazel import tool.

• Host: GitHub
• URL: https://github.com/google/cabal2bazel
• Owner: google
• License: apache-2.0
• Created: 2018-05-03T05:35:22.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2021-04-16T17:54:49.000Z (over 3 years ago)
• Last Synced: 2024-08-03T21:02:15.980Z (5 months ago)
• Language: Starlark
• Homepage:
• Size: 249 KB
• Stars: 41
• Watchers: 13
• Forks: 6
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • Changelog: ChangeLog.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-cabal - `cabal2bazel`

README

        
# cabal2bazel

A tool to help with fetching Cabal packages from Hackage and importing

them as packages into cabal2bazel.

Usage:

  cabal2bazel --fetch 

Examples:

  cabal2bazel --fetch binary

  cabal2bazel --fetch binary-0.5.0.2

  cabal2bazel --recursive --fetch lens

The process for installing third-party Haskell packages is specified at:

  https://opensource.google.com/docs/thirdparty/haskell/

cabal2bazel does not (yet) capture all the subtleties of this process,

and is no substitute for code review. But it will automate the bulk of

chores, including:

  - fetching the Cabal package;

  - unpacking it into an appropriate directory;

  - ensuring the license file is in the expected location;

  - generating a BUILD file with suitable rules.

  - if --recursive is specified, traversing graph of all dependencies of

    selected package and importing all of them.

cabal2bazel attempts to map the dependencies of a Cabal library or

executable to the 'deps' attribute of the resulting Bazel target.

Things that still need manual attention include:

  - optimization modes need to be removed from ghcopts, because Bazel

    chooses them itself;

  - cabal2bazel adds '-Wwarn' to all rules' ghcopts; this might not be

    desired;

  - correct choice of license attributes should be checked;

  - generated dependencies might need to be adjusted to point to specific

    versions of the packages depended upon.

NOTE: You will need an appropriate version of 'cabal' to be available

on your path; cabal2bazel uses it for downloading and unpacking packages.

NOTE: Sometimes it is necessary to edit the cabal file and re-run

cabal2bazel. In such cases rerun cabal2bazel as follows to resume

installation:

  cabal2bazel --wire-up 

Example:

  cabal2bazel --wire-up //third_party/haskell/binary/v0_5_0_2