Merge pull request #68 from tweag/bzlmod-ghc-versions

Test multiple GHC versions with bzlmod.

.github/workflows/workflow.yaml

@@ -19,6 +19,9 @@ jobs:
         ghc-version: [ghc_8_10_7, ghc_9_0_2, ghc_9_2_7, ghc_9_4_5]
         enable-bzlmod: [false]
         include:
+          - os: ubuntu-latest
+            ghc-version: ghc_9_2_7
+            enable-bzlmod: true
           - os: ubuntu-latest
             ghc-version: ghc_9_4_5
             enable-bzlmod: true
@@ -43,9 +46,14 @@ jobs:
               cache_setting="--remote_header=x-buildbuddy-api-key=$BUILDBUDDY_API_KEY"
           fi
 
+          # Convert "ghc_X_Y_Z" to "X.Y.Z".
+          GHC_VERSION="$(sed 's/^ghc_//;s/_/./g' <<<"${{ matrix.ghc-version }}")"
+
           bzlmod_setting=
           if [[ ${{ matrix.enable-bzlmod }} = true ]]; then
             bzlmod_setting="common --config=bzlmod"
+            # Update the GHC_VERSION in MODULE.bazel
+            sed -i.bak 's/^GHC_VERSION = .*$/GHC_VERSION = "'"$GHC_VERSION"'"/g' example/MODULE.bazel
           fi
 
           cat >.bazelrc.local <<EOF

example/MODULE.bazel

@@ -8,11 +8,14 @@ bazel_dep(name = "rules_haskell_nix")
 bazel_dep(name = "rules_go", version = "0.41.0", repo_name = "io_bazel_rules_go")
 bazel_dep(name = "gazelle", version = "0.33.0", repo_name = "bazel_gazelle")
 
+GHC_VERSION = "9.4.5"
+
 stack_snapshot = use_extension(
     "@rules_haskell//extensions:stack_snapshot.bzl",
     "stack_snapshot",
 )
 use_repo(stack_snapshot, "stackage", "stackage-exe")
+stack_snapshot.snapshot(local_snapshot = "@io_tweag_gazelle_cabal//:snapshot-%s.yaml" % GHC_VERSION)
 # TODO these should be generated by Gazelle
 stack_snapshot.package(name = "base")
 stack_snapshot.package(name = "inspection-testing")
@@ -35,7 +38,6 @@ nix_haskell_toolchains = use_extension(
     "nix_haskell_toolchains",
 )
 
-GHC_VERSION = "9.4.5"
 nix_haskell_toolchains.new(
     attribute_path = "haskell.compiler.ghc" + GHC_VERSION.replace(".", ""),
     repository = "@nixpkgs",
@@ -64,8 +66,8 @@ register_toolchains(
 )
 
 # TODO Remove once rules_haskell is in the BCR.
-RULES_HASKELL_REV = "155ba21c7d315cc421ee3f17a1c09b758cc7279d"
-RULES_HASKELL_INTEGRITY = "sha384-dIsFufYml0KGSUiC6jhY9ClMv/yEW1kGof7fLahSwfbWd28jLiwMGBGUuoOsQwWf"
+RULES_HASKELL_REV = "25831a7a3313fbadb6dbd166fca20ced6c38a1d1"
+RULES_HASKELL_INTEGRITY = "sha384-U+jg9U1fF4ibW5TDzj6UruKqD9ELsUA60QEO1MMTxbgG1BJnh0+JbQd3BcTHroSn"
 archive_override(
     module_name = "rules_haskell",
     urls = ["https://github.com/tweag/rules_haskell/archive/%s.tar.gz" % RULES_HASKELL_REV],