feat(ffitemplate): add generator for FFI glue

.pre-commit-config.yaml

@@ -33,6 +33,12 @@ repos:
     files: ^driverbase/
     types_or: [go, go-mod]
 
+  - id: golangci-lint
+    name: lint ffitemplate
+    entry: bash -c 'cd ffitemplate && golangci-lint run --fix --timeout 5m'
+    files: ^ffitemplate/
+    types_or: [go, go-mod]
+
   - id: golangci-lint
     name: lint testutil
     entry: bash -c 'cd testutil && golangci-lint run --fix --timeout 5m'
@@ -78,6 +84,12 @@ repos:
     types: [go]
     entry: bash -c 'cd driverbase && go fix'
     pass_filenames: false
+  - id: gofix-ffitemplate
+    name: go fix /ffitemplate
+    language: system
+    types: [go]
+    entry: bash -c 'cd ffitemplate && go fix'
+    pass_filenames: false
   - id: gofix-sqlwrapper
     name: go fix /sqlwrapper
     language: system

.rat-apache

@@ -24,4 +24,8 @@ driverbase/rotating_file_writer.go
 driverbase/rotating_file_writer_test.go
 driverbase/shared_utils.go
 driverbase/statement.go
+ffitemplate/_tmpl/driver.go.tmpl
+ffitemplate/_tmpl/utils.c.tmpl
+ffitemplate/_tmpl/utils.h.tmpl
+ffitemplate/main.go
 validation/validation.go

ffitemplate/README.md

@@ -0,0 +1,26 @@
+<!--
+  Copyright (c) 2026 ADBC Drivers Contributors
+
+  Licensed 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.
+-->
+
+# Template for FFI Wrapper
+
+Generate the necessary FFI code automatically for a Go-based driver.  This
+code was ported from upstream apache/arrow-adbc.
+
+Usage:
+
+```
+go run main.go -prefix Bigquery -driver path/to/driver/go
+```