fix: replace is_crate_type_lib by filter_crate_type to support extra crate-types

rap/src/bin/cargo-rap/args.rs

@@ -90,10 +90,17 @@ pub fn is_current_compile_crate() -> bool {
     ARGS.is_current_compile_crate()
 }
 
-pub fn is_crate_type_lib() -> bool {
-    get_arg_flag_value("--crate-type")
-        .map(|s| s == "lib" || s == "rlib" || s == "staticlib")
-        .unwrap_or(false)
+/// Returns true for crate types to be checked;
+/// returns false for some special crate types that can't be handled by rap.
+/// For example, skip build.rs which causes linking errors in rap.
+pub fn filter_crate_type() -> bool {
+    if let Some(s) = get_arg_flag_value("--crate-type") {
+        if s == "bin" && get_arg_flag_value("--crate-name") == Some("build_script_build") {
+            return false;
+        }
+    }
+    // NOTE: tests don't have --crate-type, they are handled with --test by rustc
+    return true;
 }
 
 pub fn get_arg(pos: usize) -> Option<&'static str> {

rap/src/bin/cargo-rap/main.rs

@@ -45,12 +45,12 @@ fn phase_rustc_wrapper() {
 
     let is_direct = args::is_current_compile_crate();
     // rap only checks local crates
-    if is_direct && args::is_crate_type_lib() {
+    if is_direct && args::filter_crate_type() {
         run_rap();
         return;
     }
 
-    // for dependencies, run rustc as usual
+    // for dependencies and some special crate types, run rustc as usual
     run_rustc();
 }