Simplify pbjs build with hack.

Just check in the generated files and create them using
js/pbjs_hack.py. This allows vscode to be used and sane
compilations.

deno2/js/pbjs_hack.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+"""
+gn can only run python scripts.
+protobuf.js must generate some javascript files.
+it's very difficult to get this into the gn build sanely.
+therefore we write them into the source directory.
+"""
+import subprocess
+import sys
+import os
+
+js_path = os.path.dirname(os.path.realpath(__file__))
+bin_path = os.path.join(js_path, "node_modules", ".bin")
+pbjs_bin = os.path.join(bin_path, "pbjs")
+pbts_bin = os.path.join(bin_path, "pbts")
+msg_pbjs_out = os.path.join(js_path, "msg.pb.js")
+msg_pbts_out = os.path.join(js_path, "msg.pb.d.ts")
+assert os.path.exists(pbjs_bin)
+assert os.path.exists(pbts_bin)
+
+proto_in = sys.argv[1]
+stamp_file = sys.argv[2]
+
+def touch(fname):
+  if os.path.exists(fname):
+    os.utime(fname, None)
+  else:
+    open(fname, 'a').close()
+
+subprocess.check_call([
+  "node",
+  pbjs_bin,
+  "--target=static-module",
+  "--wraper=commonjs",
+  "--out=" + msg_pbjs_out,
+  proto_in
+])
+assert os.path.exists(msg_pbjs_out)
+
+subprocess.check_call([
+  "node",
+  pbts_bin,
+  "--out=" + msg_pbts_out,
+  msg_pbjs_out
+])
+assert os.path.exists(msg_pbts_out)
+
+
+touch(stamp_file)