create cleaner, smaller distro using rules_pkg

BUILD

@@ -1,5 +1,50 @@
 load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
 
+load("@rules_pkg//:pkg.bzl", "pkg_tar")
+load("@rules_python//:version.bzl", "version")
+
 buildifier(
     name = "buildifier",
 )
+
+package(default_visibility = ["//visibility:private"])
+
+licenses(["notice"])  # MIT
+
+exports_files([
+    "LICENSE",
+    "version.bzl",
+])
+
+filegroup(
+    name = "distribution",
+    srcs = [
+        "BUILD",
+        "LICENSE",
+        "config.bzl",
+        "mypy.bzl",
+        "rules.bzl",
+        "current_mypy_version.txt",
+        "//mypy:distribution",
+        "//repositories:distribution",
+        "//templates:distribution",
+        "//third_party:distribution",
+    ],
+)
+
+version = "0.0.8"
+
+# Build the artifact to put on the github release page.
+pkg_tar(
+    name = "bazel_mypy_integration-{version}".format(version = version),
+    srcs = [
+        ":distribution",
+    ],
+    extension = "tar.gz",
+    # It is all source code, so make it read-only.
+    mode = "0444",
+    # Make it owned by root
+    owner = "0.0",
+    package_dir = ".",
+    strip_prefix = ".",
+)

WORKSPACE

@@ -102,3 +102,16 @@ pip_import(
 load("@my_deps//:requirements.bzl", "pip_install")
 
 pip_install()
+
+########################
+# OTHER
+########################
+
+http_archive(
+    name = "rules_pkg",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_pkg/releases/download/0.2.4/rules_pkg-0.2.4.tar.gz",
+        "https://github.com/bazelbuild/rules_pkg/releases/download/0.2.4/rules_pkg-0.2.4.tar.gz",
+    ],
+    sha256 = "4ba8f4ab0ff85f2484287ab06c0d871dcb31cc54d439457d28fd4ae14b18450a",
+)

mypy/BUILD

@@ -14,3 +14,9 @@ py_binary(
         requirement("typed_ast"),
     ],
 )
+
+filegroup(
+    name = "distribution",
+    srcs = glob(["**"]),
+    visibility = ["//:__pkg__"],
+)

repositories/BUILD

@@ -0,0 +1,5 @@
+filegroup(
+    name = "distribution",
+    srcs = glob(["**"]),
+    visibility = ["//:__pkg__"],
+)

templates/BUILD

@@ -1 +1,7 @@
 exports_files(["mypy.sh.tpl"])
+
+filegroup(
+    name = "distribution",
+    srcs = glob(["**"]),
+    visibility = ["//:__pkg__"],
+)

third_party/BUILD

@@ -0,0 +1,7 @@
+exports_files(["mypy.sh.tpl"])
+
+filegroup(
+    name = "distribution",
+    srcs = glob(["**"]),
+    visibility = ["//:__pkg__"],
+)