libs/kaptan-mavlink: fix invalid dialect bug

Signed-off-by: Onur Özkan <work@onurozkan.dev>

libs/kaptan-mavlink/Cargo.toml

@@ -16,9 +16,6 @@ dialect-kaptan = []
 [dependencies]
 mavlink = { version = "0.18", default-features = false, features = ["embedded", "dialect-common"] }
 mavlink-core = { version = "0.18", default-features = false, features = ["embedded"] }
-bitflags = "2"
-num-derive = "0.4"
-num-traits = "0.2"
 
 [build-dependencies]
 kaptan-spec = { path = "../kaptan-spec", features = ["std"] }

libs/kaptan-mavlink/build.rs

@@ -6,6 +6,7 @@ fn main() {
     let manifest_directory = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR").unwrap());
     let dialect = manifest_directory.join("definitions/kaptan.xml");
     let output_directory = std::env::var("OUT_DIR").unwrap();
+    let dialect_source = std::fs::read_to_string(&dialect).unwrap();
     let generated = mavlink_bindgen::generate(
         mavlink_bindgen::XmlDefinitions::Files(vec![dialect]),
         output_directory,
@@ -13,4 +14,8 @@ fn main() {
     .unwrap();
 
     mavlink_bindgen::emit_cargo_build_messages(&generated);
+    println!("cargo::rustc-check-cfg=cfg(kaptan_has_messages)");
+    if dialect_source.contains("<message ") {
+        println!("cargo::rustc-cfg=kaptan_has_messages");
+    }
 }

libs/kaptan-mavlink/src/lib.rs

@@ -5,7 +5,9 @@
 /// Supported MAVLink message types for Kaptan.
 pub mod message {
     pub use mavlink::MAVLinkV2MessageRaw;
+    pub use mavlink::MavHeader;
     pub use mavlink::dialects::common::*;
 
+    #[cfg(kaptan_has_messages)]
     include!(concat!(env!("OUT_DIR"), "/mod.rs"));
 }