Bazel-ify most of the Python scripts. (#229)

github_tools/BUILD

@@ -0,0 +1,43 @@
+# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+# Exceptions. See /LICENSE for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+load("@rules_python//python:defs.bzl", "py_binary", "py_library", "py_test")
+
+py_library(
+    name = "github_helpers",
+    srcs = ["github_helpers.py"],
+)
+
+py_test(
+    name = "github_helpers_test",
+    srcs = ["github_helpers_test.py"],
+    deps = [":github_helpers"],
+)
+
+py_binary(
+    name = "pr_comments",
+    srcs = ["pr_comments.py"],
+    deps = ["github_helpers"],
+)
+
+py_test(
+    name = "pr_comments_test",
+    srcs = ["pr_comments_test.py"],
+    deps = [":pr_comments"],
+)
+
+py_binary(
+    name = "update_label_access",
+    srcs = ["update_label_access.py"],
+    deps = ["github_helpers"],
+)
+
+py_test(
+    name = "update_label_access_test",
+    srcs = ["update_label_access_test.py"],
+    deps = [
+        ":pr_comments",
+        ":update_label_access",
+    ],
+)

github_tools/README.md

@@ -9,9 +9,3 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 Scripts for use with GitHub.
 
 See individual scripts for more details.
-
-Please use `pytest` for testing:
-
-```
-$ pip install pytest
-```

github_tools/github_helpers_test.py

@@ -9,7 +9,7 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 import unittest
 from unittest import mock
 
-from github_tools import github_helpers
+from carbon.github_tools import github_helpers
 
 
 _TEST_QUERY = """

github_tools/pr_comments.py

@@ -12,15 +12,21 @@ import argparse
 import datetime
 import hashlib
 import os
-import sys
+import importlib.util
 import textwrap
 
-# To support direct runs, ensure the pythonpath has the repo root.
-_PYTHONPATH = os.path.realpath(os.path.join(os.path.dirname(__file__), ".."))
-if _PYTHONPATH not in sys.path:
-    sys.path.insert(0, _PYTHONPATH)
 
-from github_tools import github_helpers
+# Do some extra work to support direct runs.
+try:
+    from carbon.github_tools import github_helpers
+except ImportError:
+    github_helpers_spec = importlib.util.spec_from_file_location(
+        "github_helpers",
+        os.path.join(os.path.dirname(__file__), "github_helpers.py"),
+    )
+    github_helpers = importlib.util.module_from_spec(github_helpers_spec)
+    github_helpers_spec.loader.exec_module(github_helpers)
+
 
 # The main query, into which other queries are composed.
 _QUERY = """

github_tools/pr_comments_test.py

@@ -10,10 +10,15 @@ import os
 import unittest
 from unittest import mock
 
-from github_tools import pr_comments
+from carbon.github_tools import github_helpers
+from carbon.github_tools import pr_comments
 
 
 class TestPRComments(unittest.TestCase):
+    def setUp(self):
+        # Stub out the access token.
+        os.environ[github_helpers._ENV_TOKEN] = "unused"
+
     def test_format_comment_short(self):
         created_at = "2001-02-03T04:05:06Z"
         self.assertEqual(

github_tools/update_label_access.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python3
-
 """Updates the contributors-with-label-access team.
 
 This team exists because we need a team to manage triage access to repos;
@@ -14,25 +12,18 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 """
 
 import argparse
-import os
-import sys
 
 # https://github.com/PyGithub/PyGithub
 # GraphQL is preferred, but falling back to pygithub for unsupported mutations.
 import github
 
-# To support direct runs, ensure the pythonpath has the repo root.
-_PYTHONPATH = os.path.realpath(os.path.join(os.path.dirname(__file__), ".."))
-if _PYTHONPATH not in sys.path:
-    sys.path.insert(0, _PYTHONPATH)
-
-from github_tools import github_helpers
+from carbon.github_tools import github_helpers
 
 # The organization to mirror members from.
 _ORG = "carbon-language"
 
 # The team to mirror to.
-_TEAM = "contributors-with-label-access"
+_TEAM = "contributors"
 
 # Accounts in the org to skip mirroring.
 _IGNORE_ACCOUNTS = ("CarbonLangInfra", "google-admin", "googlebot")

github_tools/update_label_access_test.py

@@ -6,16 +6,21 @@ Exceptions. See /LICENSE for license information.
 SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 """
 
-import github
+import os
 import unittest
 from unittest import mock
 
-from github_tools import github_helpers
-from github_tools import update_label_access
+import github
+
+from carbon.github_tools import github_helpers
+from carbon.github_tools import update_label_access
 
 
 class TestUpdateLabelAccess(unittest.TestCase):
     def setUp(self):
+        # Stub out the access token.
+        os.environ[github_helpers._ENV_TOKEN] = "unused"
+
         self.client = mock.create_autospec(github_helpers.Client, instance=True)
         self.gh = mock.create_autospec(github.Github, instance=True)
         self.gh_org = mock.create_autospec(github.Organization, instance=True)