feat(hive): vendor Hive Metastore IDL and generated bindings (#749)

- Update vendored Hive Metastore IDL to Hive 4.0.1.
- Check in generated HMS/fb303 C++ bindings.
- Add a regeneration script plus lint/license exclusions for generated sources.

Author: MisterRaindrop

.github/.licenserc.yaml

@@ -31,6 +31,7 @@ header:
     - 'requirements.txt'
     - 'src/iceberg/util/murmurhash3_internal.*'
     - 'src/iceberg/test/resources/**'
+    - 'src/iceberg/catalog/hive/gen-cpp/**'
     - 'thirdparty/**'
 
   comment: on-failure

.github/workflows/cpp-linter.yml

@@ -68,7 +68,7 @@ jobs:
           files-changed-only: true
           lines-changed-only: true
           thread-comments: true
-          ignore: 'build|cmake_modules|ci'
+          ignore: 'build|cmake_modules|ci|src/iceberg/catalog/hive/gen-cpp'
           database: build
           verbosity: 'debug'
           # need '-fno-builtin-std-forward_like', see https://github.com/llvm/llvm-project/issues/101614

.pre-commit-config.yaml

@@ -25,15 +25,19 @@ repos:
     rev: v5.0.0
     hooks:
       - id: trailing-whitespace
+        exclude: ^src/iceberg/catalog/hive/gen-cpp/
       - id: end-of-file-fixer
+        exclude: ^src/iceberg/catalog/hive/gen-cpp/
       - id: check-yaml
       - id: check-added-large-files
+        exclude: ^src/iceberg/catalog/hive/gen-cpp/
 
   - repo: https://github.com/pre-commit/mirrors-clang-format
     rev: v20.1.8
     hooks:
       - id: clang-format
         exclude_types: [json]
+        exclude: ^src/iceberg/catalog/hive/gen-cpp/
 
   - repo: https://github.com/cheshirekow/cmake-format-precommit
     rev: v0.6.10

dev/update_hive_thrift.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Regenerate the committed Hive Metastore C++ bindings from the vendored
+# Thrift IDL. Run this whenever thirdparty/hive_metastore/*.thrift changes.
+# Requires the Apache Thrift IDL compiler ("thrift") on PATH; the generated
+# sources are checked in so a normal build needs no Thrift compiler.
+
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+idl_dir="${repo_root}/thirdparty/hive_metastore"
+out_dir="${repo_root}/src/iceberg/catalog/hive/gen-cpp"
+
+if ! command -v thrift >/dev/null 2>&1; then
+  echo "error: 'thrift' IDL compiler not found on PATH" >&2
+  echo "       install it (e.g. 'brew install thrift' or 'apt install thrift-compiler')" >&2
+  exit 1
+fi
+
+rm -rf "${out_dir}"
+mkdir -p "${out_dir}"
+
+# -r recurses into included IDL (fb303); cpp:no_skeleton omits server stubs.
+thrift -r --gen cpp:no_skeleton -out "${out_dir}" \
+  -I "${idl_dir}" "${idl_dir}/hive_metastore.thrift"
+
+echo "Regenerated Hive Metastore bindings in ${out_dir}"
+echo "Review the diff and commit the result."