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

third_party/bazel/rules_haskell/haskell/repositories.bzl

@@ -0,0 +1,17 @@
+"""Workspace rules (repositories)"""
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+def haskell_repositories():
+    """Provide all repositories that are necessary for `rules_haskell` to
+    function.
+    """
+    excludes = native.existing_rules().keys()
+
+    if "bazel_skylib" not in excludes:
+        http_archive(
+            name = "bazel_skylib",
+            sha256 = "eb5c57e4c12e68c0c20bc774bfbc60a568e800d025557bc4ea022c6479acc867",
+            strip_prefix = "bazel-skylib-0.6.0",
+            urls = ["https://github.com/bazelbuild/bazel-skylib/archive/0.6.0.tar.gz"],
+        )