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Основа — Horizon (MIT). История апстрима не переносится: этот репозиторий ведёт свою.

tools/generate_command_order.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""Generate crates/horizon-command/src/vanilla_order.rs: the order of
+the children of each node of vanilla's command tree where Horizon's tree
+registers them in a different order. Brigadier keeps children in
+registration order, and /help (smart usage) lists them that way.
+
+  python3 tools/test_command_parse_parity.py         # exports .local/command-parse-parity/tree.json
+  command_parse_fixture tree rust_tree.json          # Horizon's tree in its registration order
+  generate_command_order.py VANILLA_TREE RUST_TREE
+"""
+import argparse
+import json
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+    parser.add_argument("vanilla", type=Path)
+    parser.add_argument("rust", type=Path)
+    parser.add_argument("--out", type=Path, default=ROOT / "crates/horizon-command/src/vanilla_order.rs")
+    args = parser.parse_args()
+    vanilla = json.loads(args.vanilla.read_text())
+    rust = json.loads(args.rust.read_text())
+    rows = []
+
+    def walk(v, r, path):
+        names = list(v.get("children", {}))
+        # GameRuleCommand registers the rules in a Reference2ObjectOpenHashMap's
+        # (identity hash) order, which changes from run to run.
+        if path == ["gamerule"]:
+            return
+        order = r.get("order", [])
+        shared = [n for n in names if n in order]
+        if shared != [n for n in order if n in names]:
+            rows.append((" ".join(path), shared))
+        for n in names:
+            if n in r.get("children", {}):
+                walk(v["children"][n], r["children"][n], path + [n])
+
+    walk(vanilla, rust, [])
+    if not rows or rows[0][0] != "":
+        raise SystemExit("expected the root's order to differ")
+    lines = [
+        "//! The order of node children in vanilla's command tree, for the nodes",
+        "//! where Horizon's tree registers them differently (path of node names",
+        "//! from the root, children in vanilla's order). Generated by",
+        "//! tools/generate_command_order.py; do not edit by hand.",
+        "",
+        "pub const ORDER: &[(&str, &[&str])] = &[",
+    ]
+    for path, names in rows:
+        joined = ", ".join(f'"{n}"' for n in names)
+        lines.append(f'    ("{path}", &[{joined}]),')
+    lines += ["];", ""]
+    args.out.write_text("\n".join(lines))
+    print(f"wrote {len(rows)} nodes to {args.out}")
+
+
+if __name__ == "__main__":
+    main()