feat(third_party/bazel): Check in rules_haskell from Tweag

third_party/bazel/rules_haskell/tutorial/WORKSPACE

@@ -0,0 +1,49 @@
+workspace(name = "io_tweag_rules_haskell_tutorial")
+
+local_repository(
+    name = "io_tweag_rules_haskell",
+    path = "..",
+)
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@io_tweag_rules_haskell//haskell:repositories.bzl", "haskell_repositories")
+
+haskell_repositories()
+
+rules_nixpkgs_version = "0.5.2"
+
+http_archive(
+    name = "io_tweag_rules_nixpkgs",
+    sha256 = "5a384daa57b49abf9f0b672852f1a66a3c52aecf9d4d2ac64f6de0fd307690c8",
+    strip_prefix = "rules_nixpkgs-%s" % rules_nixpkgs_version,
+    urls = ["https://github.com/tweag/rules_nixpkgs/archive/v%s.tar.gz" % rules_nixpkgs_version],
+)
+
+load(
+    "@io_tweag_rules_nixpkgs//nixpkgs:nixpkgs.bzl",
+    "nixpkgs_cc_configure",
+)
+
+nixpkgs_cc_configure(
+    nix_file = "@io_tweag_rules_haskell//nixpkgs:cc-toolchain.nix",
+    repository = "@io_tweag_rules_haskell//nixpkgs:default.nix",
+)
+
+load(
+    "@io_tweag_rules_haskell//haskell:nixpkgs.bzl",
+    "haskell_register_ghc_nixpkgs",
+)
+
+haskell_register_ghc_nixpkgs(
+    repositories = {
+        "nixpkgs": "@io_tweag_rules_haskell//nixpkgs:default.nix",
+    },
+    version = "8.6.4",
+)
+
+load(
+    "@io_tweag_rules_haskell//haskell:haskell.bzl",
+    "haskell_register_ghc_bindists",
+)
+
+haskell_register_ghc_bindists(version = "8.6.4")