bazel: Shift deprecate_* tools to bazel and cleanup requirements

.github/dependabot.yml

@@ -36,16 +36,6 @@ updates:
   schedule:
     interval: "daily"
 
-- package-ecosystem: "pip"
-  directory: "/tools/deprecate_features"
-  schedule:
-    interval: "daily"
-
-- package-ecosystem: "pip"
-  directory: "/tools/deprecate_version"
-  schedule:
-    interval: "daily"
-
 - package-ecosystem: "pip"
   directory: "/ci/flaky_test"
   schedule:

GOVERNANCE.md

@@ -140,7 +140,7 @@ New Features
 Deprecated
 ----------
 ```
-* Run the deprecate_versions.py script (e.g. `sh tools/deprecate_version/deprecate_version.sh`)
+* Run the deprecate_versions.py script (e.g. `bazel run //tools/deprecate_version:deprecate_version`)
   to file tracking issues for runtime guarded code which can be removed.
 * Check source/common/runtime/runtime_features.cc and see if any runtime guards in
   disabled_runtime_features should be reassessed, and ping on the relevant issues.

tools/deprecate_features/BUILD

@@ -0,0 +1,9 @@
+load("@rules_python//python:defs.bzl", "py_binary")
+
+licenses(["notice"])  # Apache 2
+
+py_binary(
+    name = "deprecate_features",
+    srcs = ["deprecate_features.py"],
+    deps = ["@envoy_repo"],
+)

tools/deprecate_features/deprecate_features.py

@@ -4,13 +4,15 @@
 import re
 import subprocess
 import fileinput
-from six.moves import input
+
+import envoy_repo
 
 
 # Sorts out the list of deprecated proto fields which should be disallowed and returns a tuple of
 # email and code changes.
 def deprecate_proto():
-    grep_output = subprocess.check_output('grep -r "deprecated = true" api/*', shell=True)
+    grep_output = subprocess.check_output(
+        'grep -r "deprecated = true" api/*', shell=True, cwd=envoy_repo.PATH)
 
     filenames_and_fields = set()
 

tools/deprecate_version/BUILD

@@ -0,0 +1,13 @@
+load("@rules_python//python:defs.bzl", "py_binary")
+load("@base_pip3//:requirements.bzl", "requirement")
+
+licenses(["notice"])  # Apache 2
+
+py_binary(
+    name = "deprecate_version",
+    srcs = ["deprecate_version.py"],
+    deps = [
+        requirement("gitpython"),
+        requirement("pygithub"),
+    ],
+)

tools/deprecate_version/deprecate_version.py

@@ -1,14 +1,6 @@
-# Script for automating cleanup PR creation for deprecated runtime features
+# Bazel usage
 #
-# sh tools/deprecate_version/deprecate_version.sh
-#
-# Direct usage (not recommended):
-#
-# python tools/deprecate_version/deprecate_version.py
-#
-# e.g
-#
-#  python tools/deprecate_version/deprecate_version.py
+# bazel run //tools/deprecate_version:deprecate_version
 #
 # A GitHub access token must be set in GITHUB_TOKEN. To create one, go to
 # Settings -> Developer settings -> Personal access tokens in GitHub and create