add more automation to build script

sys/Cargo.toml

@@ -6,6 +6,7 @@ description = "Rust bindings for whisper.cpp (FFI bindings)"
 license = "Unlicense"
 documentation = "https://docs.rs/whisper-rs-sys"
 repository = "https://github.com/tazz4843/whisper-rs"
+links = "whisper"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

sys/build.rs

@@ -12,11 +12,39 @@ fn main() {
         .header("wrapper.h")
         .clang_arg("-I./whisper.cpp")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks))
-        .generate()
-        .expect("Unable to generate bindings");
+        .generate();
 
+    match bindings {
+        Ok(b) => {
             let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
-    bindings
-        .write_to_file(out_path.join("bindings.rs"))
+            b.write_to_file(out_path.join("bindings.rs"))
                 .expect("Couldn't write bindings!");
         }
+        Err(e) => {
+            println!("cargo:warning=Unable to generate bindings: {}", e);
+            println!("cargo:warning=Using bundled bindings.rs, which may be out of date");
+            // copy src/bindings.rs to OUT_DIR
+            std::fs::copy(
+                "src/bindings.rs",
+                env::var("OUT_DIR").unwrap() + "/bindings.rs",
+            )
+            .expect("Unable to copy bindings.rs");
+        }
+    }
+
+    // build libwhisper.a
+    env::set_current_dir("whisper.cpp").expect("Unable to change directory");
+    let code = std::process::Command::new("make")
+        .arg("libwhisper.a")
+        .status()
+        .expect("Failed to build libwhisper.a");
+    if code.code() != Some(0) {
+        panic!("Failed to build libwhisper.a");
+    }
+    // move libwhisper.a to where Cargo expects it (OUT_DIR)
+    std::fs::copy(
+        "libwhisper.a",
+        format!("{}/libwhisper.a", env::var("OUT_DIR").unwrap()),
+    )
+    .expect("Failed to copy libwhisper.a");
+}