[Private GATT] Initial boilerplate

Bug: 255880936
Test: compiles
Change-Id: Ia835784365e6fa6cf8a4bd23c088b1fb2dbe0ed9

1 files changed, 30 insertions, 0 deletions

diff --git a/system/rust/build.rs b/system/rust/build.rs
new file mode 100644
index 0000000000..f0e49e69df
--- /dev/null
+++ b/system/rust/build.rs
@@ -0,0 +1,30 @@
+use std::{
+    env,
+    fs::File,
+    path::Path,
+    process::{Command, Stdio},
+};
+
+fn main() {
+    let out_dir = env::var_os("OUT_DIR").unwrap();
+    let dest_path = Path::new(&out_dir).join("_packets.rs");
+    let dest_file = File::create(dest_path).unwrap();
+
+    let pdl = Command::new("pdl")
+        .args(&["--output-format", "rust_no_alloc", "src/packets.pdl"])
+        .stdout(Stdio::piped())
+        .spawn()
+        .unwrap();
+
+    let mut rustfmt =
+        Command::new("rustfmt").stdin(pdl.stdout.unwrap()).stdout(dest_file).spawn().unwrap();
+
+    rustfmt.wait().unwrap();
+
+    if let Some(err) = rustfmt.stderr {
+        panic!("{:?}", err);
+    }
+
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed=src/packets.pdl");
+}