[wpiutil,glass,dlt] Replace libprotobuf with upb for dynamic decode (#7988)

libprotobuf is a very annoying dependency to deal with, and with the switch to nanopb for generated C++ code, libprotobuf is only used for dynamic decode in the GUI apps. libprotobuf has been swapped out with upb, a much smaller C-based library that supports reflection and can therefore do dynamic decode. This means we can remove the libprotobuf dependency and stop dealing with build issues because of it.

upstream_utils/upb.py

@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+
+import os
+import shutil
+from pathlib import Path
+
+from upstream_utils import (
+    Lib,
+    comment_out_invalid_includes,
+    copy_to,
+    walk_cwd_and_copy_if,
+)
+
+
+def copy_upstream_src(wpilib_root: Path):
+    upstream_root = Path(".").absolute()
+    wpiutil = wpilib_root / "wpiutil"
+
+    # Delete old install
+    for d in [
+        "src/main/native/thirdparty/upb/include",
+        "src/main/native/thirdparty/upb/src",
+    ]:
+        shutil.rmtree(wpiutil / d, ignore_errors=True)
+
+    os.chdir(upstream_root / "third_party/utf8_range")
+    copy_to(
+        [Path("utf8_range.h")],
+        wpiutil / "src/main/native/thirdparty/upb/include",
+    )
+    copy_to(
+        [
+            Path("utf8_range.c"),
+            Path("utf8_range_sse.inc"),
+            Path("utf8_range_neon.inc"),
+        ],
+        wpiutil / "src/main/native/thirdparty/upb/src",
+    )
+    # Change directory to upb to minimize the number of files to walk
+    os.chdir(upstream_root / "upb")
+    include_files = walk_cwd_and_copy_if(
+        lambda dp, f: (
+            len(dp.parts) >= 1
+            and (
+                dp.parts[0] == "base"
+                or dp.parts[0] == "hash"
+                or dp.parts[0] == "mem"
+                or (
+                    dp.parts[0] == "message"
+                    and "compare" not in f
+                    and "promote" not in f
+                    and "accessors_split64" not in f
+                )
+                or dp.parts[0] == "mini_descriptor"
+                or (dp.parts[0] == "mini_table" and "compat" not in f)
+                or dp.parts[0] == "port"
+                or dp.parts[0] == "reflection"
+                or (
+                    dp.parts[0] == "wire"
+                    and "byte_size" not in f
+                    and "decode_fast" not in dp.parts
+                    and "test_util" not in dp.parts
+                )
+            )
+            and "cmake" not in dp.parts
+        )
+        and (f.endswith(".h") or f.endswith(".inc"))
+        or f == "generated_code_support.h",
+        wpiutil / "src/main/native/thirdparty/upb/include/upb",
+    )
+    for f in include_files:
+        comment_out_invalid_includes(
+            f, [wpiutil / "src/main/native/thirdparty/upb/include"]
+        )
+
+    walk_cwd_and_copy_if(
+        lambda dp, f: (
+            len(dp.parts) >= 1
+            and (
+                dp.parts[0] == "base"
+                or dp.parts[0] == "hash"
+                or dp.parts[0] == "mem"
+                or (
+                    dp.parts[0] == "message"
+                    and "compare" not in f
+                    and "promote" not in f
+                )
+                or dp.parts[0] == "mini_descriptor"
+                or (dp.parts[0] == "mini_table" and "compat" not in f)
+                or dp.parts[0] == "port"
+                or dp.parts[0] == "reflection"
+                or (
+                    dp.parts[0] == "wire"
+                    and "byte_size" not in f
+                    and "decode_fast" not in dp.parts
+                )
+            )
+        )
+        and f.endswith(".c")
+        and not f == "descriptor.upb_minitable.c",
+        wpiutil / "src/main/native/thirdparty/upb/src",
+    )
+
+
+def main():
+    name = "upb"
+    url = "https://github.com/protocolbuffers/protobuf"
+    tag = "v32.0"
+
+    upb = Lib(name, url, tag, copy_upstream_src)
+    upb.main()
+
+
+if __name__ == "__main__":
+    main()