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

third_party/bazel/rules_haskell/tests/binary-with-lib/BUILD.bazel

@@ -0,0 +1,27 @@
+load(
+    "@io_tweag_rules_haskell//haskell:haskell.bzl",
+    "haskell_library",
+    "haskell_test",
+)
+
+package(default_testonly = 1)
+
+haskell_library(
+    name = "lib",
+    srcs = glob(["src/*.hs"]),
+    src_strip_prefix = "src",
+    deps = [
+        "//tests/hackage:template-haskell",
+    ],
+)
+
+haskell_test(
+    name = "binary-with-lib",
+    srcs = ["Main.hs"],
+    visibility = ["//visibility:public"],
+    deps = [
+        ":lib",
+        "//tests/hackage:base",
+        "//tests/hackage:template-haskell",
+    ],
+)

third_party/bazel/rules_haskell/tests/binary-with-lib/Main.hs

@@ -0,0 +1,11 @@
+{-# LANGUAGE TemplateHaskell #-}
+module Main where
+
+import Control.Monad (unless)
+import Lib           (value)
+import Language.Haskell.TH
+
+val = $(value)
+
+main = unless (val == 42)
+    $ error $ "Incorrect lib value. Got " <> show val

third_party/bazel/rules_haskell/tests/binary-with-lib/src/Lib.hs

@@ -0,0 +1,8 @@
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+module Lib (value) where
+
+import Language.Haskell.TH
+
+value = [|42|]