patches/bindgen_cmd.diff

diff --git a/android/bindgen_cmd/Android.bp b/android/bindgen_cmd/Android.bp
new file mode 100644
index 0000000..689e7ae
--- /dev/null
+++ b/android/bindgen_cmd/Android.bp
@@ -0,0 +1,28 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "external_rust_crates_bindgen_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["external_rust_crates_bindgen_license"],
+}
+
+rust_library_host {
+    name: "libbindgen_cmd",
+    crate_name: "bindgen_cmd",
+    srcs: ["src/lib.rs"],
+    edition: "2018",
+    features: [
+        "clap",
+        "runtime",
+        "which",
+        "which-rustfmt",
+    ],
+    rustlibs: [
+        "libbindgen",
+        "libbindgen_cli",
+        "libclap",
+        "libenv_logger",
+    ],
+    compile_multilib: "first",
+}
diff --git a/android/bindgen_cmd/src/lib.rs b/android/bindgen_cmd/src/lib.rs
new file mode 100644
index 0000000..d33da7f
--- /dev/null
+++ b/android/bindgen_cmd/src/lib.rs
@@ -0,0 +1,50 @@
+// Copyright 2020, The Android Open Source Project
+//
+// 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.
+
+//! This is a helper crate for using bindgen as a library from within
+//! Android's build system. Some functionality (such as the type selection
+//! heuristic) is not available on the command line, and so the library
+//! interface may be necessary. Bindgen also needs to receive configuration
+//! from Soong however to find appropriate headers, set global cflags, etc.
+//!
+//! This crate provides the ability to run a hooked version of the command
+//! line bindgen tool, with the ability to call a user-provided transformation
+//! on the the builder before it is used.
+
+use bindgen;
+use bindgen_cli;
+use std::env;
+
+/// Takes in a function describing adjustments to make to a builder
+/// initialized by the command line. `build(|x| x)` is equivalent to
+/// running bindgen. When converting a build.rs, you will want to convert the
+/// additional configuration they do into a function, then pass it to `build`
+/// inside your main function.
+pub fn build<C: FnOnce(bindgen::Builder) -> bindgen::Builder>(configure: C) {
+    env_logger::init();
+
+    match bindgen_cli::builder_from_flags(env::args()) {
+        Ok((builder, output, _)) => {
+            configure(builder)
+                .generate()
+                .expect("Unable to generate bindings")
+                .write(output)
+                .expect("Unable to write output");
+        }
+        Err(error) => {
+            eprintln!("{}", error);
+            std::process::exit(1);
+        }
+    };
+}