[upstream_utils] Rework upstream_utils scripts (#6829)

upstream_utils/gcem.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+import os
+import shutil
+
+from upstream_utils import (
+    get_repo_root,
+    clone_repo,
+    comment_out_invalid_includes,
+    walk_cwd_and_copy_if,
+    git_am,
+    Lib,
+)
+
+
+def copy_upstream_src(wpilib_root):
+    wpimath = os.path.join(wpilib_root, "wpimath")
+
+    # Delete old install
+    for d in [
+        "src/main/native/thirdparty/gcem/include",
+    ]:
+        shutil.rmtree(os.path.join(wpimath, d), ignore_errors=True)
+
+    # Copy gcem include files into allwpilib
+    include_files = walk_cwd_and_copy_if(
+        lambda dp, f: dp.startswith("./include"),
+        os.path.join(wpimath, "src/main/native/thirdparty/gcem"),
+    )
+
+    for f in include_files:
+        comment_out_invalid_includes(
+            f, [os.path.join(wpimath, "src/main/native/thirdparty/gcem/include")]
+        )
+
+
+def main():
+    name = "gcem"
+    url = "https://github.com/kthohr/gcem.git"
+    tag = "v1.18.0"
+
+    patch_list = [
+        "0001-Call-std-functions-if-not-constant-evaluated.patch",
+        "0002-Add-hypot-x-y-z.patch",
+    ]
+
+    gcem = Lib(name, url, tag, patch_list, copy_upstream_src)
+    gcem.main()
+
+
+if __name__ == "__main__":
+    main()