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

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

@@ -0,0 +1,26 @@
+load(
+    "@io_tweag_rules_haskell//haskell:haskell.bzl",
+    "haskell_library",
+    "haskell_test",
+)
+
+package(default_testonly = 1)
+
+haskell_library(
+    name = "lib",
+    srcs = ["src/Lib.hs"],
+    deps = [
+        "//tests/hackage:base",
+        "//tests/hackage:transformers",
+    ],
+)
+
+haskell_test(
+    name = "binary-with-import",
+    srcs = ["Main.hs"],
+    visibility = ["//visibility:public"],
+    deps = [
+        ":lib",
+        "//tests/hackage:base",
+    ],
+)

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

@@ -0,0 +1,6 @@
+module Main where
+
+import Lib (printValue)
+
+main :: IO ()
+main = printValue

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

@@ -0,0 +1,13 @@
+module Lib (printValue) where
+
+import Control.Monad (void)
+import Control.Monad.Trans.Class (lift)
+import Control.Monad.Trans.Except (ExceptT, runExceptT)
+
+getValue :: Monad m => ExceptT e m Int
+getValue = pure 42
+
+printValue :: IO ()
+printValue = void $ runExceptT $ do
+  value <- getValue
+  lift $ print value