fixed artifact dep

relay/build.rs

@@ -1,58 +1,12 @@
-use std::path::PathBuf;
-use std::process::Command;
+use std::env;
 
 fn main() {
-    // silly hack of sorts because bindeps are unstable
+    let artifact_path = env::var_os("CARGO_STATICLIB_FILE_LIBVHDL_CONN")
+        .expect("missing staticlib artifact for build-dependency `libvhdl_conn`");
 
-
-    let manifest_dir = PathBuf::from(
-        std::env::var("CARGO_MANIFEST_DIR")
-            .expect("CARGO_MANIFEST_DIR was not set by Cargo"),
+    println!("cargo:rerun-if-changed={}", artifact_path.display());
+    println!(
+        "cargo:rustc-env=EMBEDDED_VHDL_CONN_LIB_PATH={}",
+        artifact_path.display()
     );
-    let workspace_root = manifest_dir
-        .parent()
-        .expect("relay crate should live under a workspace root");
-
-    println!("cargo:rerun-if-changed={}", workspace_root.join("conn").display());
-
-    let isolated_target_dir = workspace_root.join("target").join("conn-build");
-
-    let status = Command::new("cargo")
-        .arg("build")
-        .arg("--package")
-        .arg("libvhdl_conn")
-        .arg("--release")
-        .arg("--lib")
-        .arg("--target-dir")
-        .arg(&isolated_target_dir)
-        .current_dir(workspace_root)
-        .status()
-        .expect("failed to spawn cargo build for conn");
-
-    if !status.success() {
-        panic!(
-            "build script failed: `cargo build --package conn --release --lib` exited with {status}"
-        );
-    }
-
-    // Copy the built staticlib into the workspace release target path used by relay/src/build.rs.
-    let isolated_release_dir = isolated_target_dir.join("release");
-    let out_release_dir = workspace_root.join("target").join("release");
-    std::fs::create_dir_all(&out_release_dir).expect("failed to create workspace target/release");
-
-    // conn currently builds as libvhdl_conn.a; keep a compatibility alias for relay/src/build.rs (libvhdl_ui.a).
-    let src_lib = isolated_release_dir.join("libvhdl_conn.a");
-    if !src_lib.exists() {
-        panic!(
-            "build script failed: expected static library not found at {}",
-            src_lib.display()
-        );
-    }
-
-    let dst_conn = out_release_dir.join("libvhdl_conn.a");
-    std::fs::copy(&src_lib, &dst_conn).expect("failed to copy libconn.a into workspace target/release");
-
-    let dst_compat = out_release_dir.join("libvhdl_conn.a");
-    std::fs::copy(&src_lib, &dst_compat)
-        .expect("failed to copy compatibility libvhdl_conn.a into workspace target/release");
 }