build: update cgosling's build.rs to check for generated files

blueprint-freespeech · Jan 28, 2024 · 28dc34a · 28dc34a
1 parent d770e74
commit 28dc34a
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Showing 2 changed files with 2 additions and 3 deletions.
diff --git a/source/gosling/crates/cgosling/CMakeLists.txt b/source/gosling/crates/cgosling/CMakeLists.txt
@@ -37,9 +37,6 @@ endif()
 add_custom_command(
     DEPENDS ${cgosling_sources}
     OUTPUT ${cgosling_outputs}
-    # cargo test of this same project will also run build.rs, so we need to touch build.rs
-    # to force cargo to re-run it and generate cbindgen headers (cmake seems to delete the first output file)
-    COMMAND touch ${CMAKE_CURRENT_SOURCE_DIR}/build.rs
     COMMAND env CARGO_TARGET_DIR=${CARGO_TARGET_DIR} RUSTFLAGS=${RUSTFLAGS} cargo build ${CARGO_FLAGS}
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 )

diff --git a/source/gosling/crates/cgosling/build.rs b/source/gosling/crates/cgosling/build.rs
@@ -186,6 +186,7 @@ fn main() {
     };
 
     let header_file_path = target_dir.join("include").join("cgosling.h");
+    println!("cargo:rerun-if-changed={}",header_file_path.display());
 
     // generate libgosling.h C header
     match cbindgen::generate(&crate_dir) {
@@ -196,6 +197,7 @@ fn main() {
 
     // convert generated header to json IDL
     let json_file_path = target_dir.join("cgosling.json");
+    println!("cargo:rerun-if-changed={}",json_file_path.display());
     let json_file = match File::create(json_file_path) {
         Ok(file) => file,
         Err(err) => panic!("{:?}", err),