Split uwb_uci_packets to separated crate

This CL follows the Android's best practice [1] to create a
separated crate for the generated rust code, and supports Cargo build
system for the crate.

[1]: https://source.android.com/setup/build/rust/building-rust-modules/source-code-generators/source-code-gen-intro

Bug: 224686845
Test: mmm external/uwb -j32
Test: "cargo test" at external/uwb/src/rust/uwb_uci_packets/ folder
Test: atest libuwb_uci_packet_tests

Change-Id: If1c86588aef6736b195e6fc302d7ce11ff8d0dd8

5 files changed, 89 insertions, 15 deletions

diff --git a/src/Android.bp b/src/Android.bp
index 2e60932..618e7bc 100755
--- a/src/Android.bp
+++ b/src/Android.bp
@@ -64,11 +64,23 @@ rust_test {
     auto_gen_config: true,
 }
 
-rust_test {
-    name: "libuwb_uci_packet_tests",
+rust_defaults {
+    name: "libuwb_uci_packet_defaults",
     srcs: [
+        "rust/uwb_uci_packets/src/lib.rs",
         ":UwbGeneratedPackets_rust",
     ],
+    proc_macros: ["libnum_derive"],
+    rustlibs:[
+        "libbytes",
+        "libnum_traits",
+        "libthiserror",
+    ],
+}
+
+rust_test {
+    name: "libuwb_uci_packet_tests",
+    defaults: ["libuwb_uci_packet_defaults"],
     test_suites: [
         "general-tests",
         "mts-uwb"
@@ -87,27 +99,17 @@ rust_test {
         },
     },
     auto_gen_config: true,
-    proc_macros: ["libnum_derive"],
     rustlibs:[
         "android.hardware.uwb-V1-rust",
-        "libbytes",
         "liblog_rust",
-        "libnum_traits",
-        "libthiserror",
         "libuwb_uci_rust",
     ],
 }
 
 rust_library {
     name: "libuwb_uci_packets",
+    defaults: ["libuwb_uci_packet_defaults"],
     crate_name: "uwb_uci_packets",
-    srcs: [":UwbGeneratedPackets_rust"],
-    proc_macros: ["libnum_derive"],
-    rustlibs: [
-        "libbytes",
-        "libnum_traits",
-        "libthiserror",
-    ],
     apex_available: [
         "com.android.uwb",
     ],
@@ -121,9 +123,9 @@ genrule {
     ],
     cmd: "$(location bluetooth_packetgen) --include=external/uwb/src --out=$(genDir) $(in) --rust",
     srcs: [
-        "rust/uci_packets.pdl",
+        "rust/uwb_uci_packets/uci_packets.pdl",
     ],
     out: [
-        "rust/uci_packets.rs",
+        "rust/uwb_uci_packets/uci_packets.rs",
     ],
 }
diff --git a/src/rust/uwb_uci_packets/Cargo.toml b/src/rust/uwb_uci_packets/Cargo.toml
new file mode 100644
index 0000000..4f88316
--- /dev/null
+++ b/src/rust/uwb_uci_packets/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "uwb_uci_packets"
+version = "0.0.1"
+edition = "2018"
+
+[dependencies]
+bytes = "*"
+num-derive = "*"
+num-traits = "*"
+thiserror = "*"
+walkdir = "*"
diff --git a/src/rust/uwb_uci_packets/build.rs b/src/rust/uwb_uci_packets/build.rs
new file mode 100644
index 0000000..bc30c36
--- /dev/null
+++ b/src/rust/uwb_uci_packets/build.rs
@@ -0,0 +1,39 @@
+// Copyright 2022, 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.
+
+use std::env;
+use std::process::Command;
+
+fn main() {
+    println!("cargo:rerun-if-changed=uci_packets.pdl");
+
+    // Generate the rust code by bluetooth_packetgen.
+    // The binary should be compiled by `m bluetooth_packetgen -j32` before calling cargo.
+    let out_dir = env::var_os("OUT_DIR").unwrap();
+    let output = Command::new("env")
+        .arg("bluetooth_packetgen")
+        .arg("--out=".to_owned() + out_dir.as_os_str().to_str().unwrap())
+        .arg("--include=.")
+        .arg("--rust")
+        .arg("uci_packets.pdl")
+        .output()
+        .unwrap();
+
+    eprintln!(
+        "Status: {}, stdout: {}, stderr: {}",
+        output.status,
+        String::from_utf8_lossy(output.stdout.as_slice()),
+        String::from_utf8_lossy(output.stderr.as_slice())
+    );
+}
diff --git a/src/rust/uwb_uci_packets/src/lib.rs b/src/rust/uwb_uci_packets/src/lib.rs
new file mode 100644
index 0000000..224d594
--- /dev/null
+++ b/src/rust/uwb_uci_packets/src/lib.rs
@@ -0,0 +1,22 @@
+// Copyright 2022, 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.
+
+#![allow(clippy::all)]
+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+#![allow(unused)]
+#![allow(missing_docs)]
+
+include!(concat!(env!("OUT_DIR"), "/uci_packets.rs"));
diff --git a/src/rust/uci_packets.pdl b/src/rust/uwb_uci_packets/uci_packets.pdl
index 3f0e95f..3f0e95f 100644
--- a/src/rust/uci_packets.pdl
+++ b/src/rust/uwb_uci_packets/uci_packets.pdl