move //tools/codegen:codegen into shared build structure

Michael Andreas Dagitses · Michael Andreas Dagitses · commit bab789ed960a · 2022-03-17T13:15:13.000-07:00
This is currently only used by Buck. Differential Revision: [D34971529](https://our.internmc.facebook.com/intern/diff/D34971529/) **NOTE FOR REVIEWERS**: This PR has internal Facebook specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D34971529/)! ghstack-source-id: 151649215 Pull Request resolved: #74386
diff --git a/tools/codegen/build.bzl b/tools/codegen/build.bzl
@@ -0,0 +1,10 @@
+def define_targets(rules):
+    rules.py_library(
+        name = "codegen",
+        srcs = glob(["**/*.py"]),
+        deps = [
+            rules.requirement("PyYAML"),
+            rules.requirement("typing-extensions"),
+        ],
+        visibility = ["//visibility:public"],
+    )
