do not use libloading

1 files changed, 77 insertions, 5 deletions

diff --git a/impls/monero.rs/build.rs b/impls/monero.rs/build.rs
index 357028b..19a4394 100644
--- a/impls/monero.rs/build.rs
+++ b/impls/monero.rs/build.rs
@@ -1,13 +1,86 @@
 use std::env;
+use std::fs::{self, OpenOptions};
+use std::io::Write;
 use std::path::PathBuf;
 use bindgen::EnumVariation;
 
+#[cfg(unix)]
+use std::os::unix::fs as unix_fs;
+
+#[cfg(target_os = "windows")]
+use std::fs::copy;
+
 fn main() {
     let header_path = "../../monero_libwallet2_api_c/src/main/cpp/wallet2_api_c.h";
+    let lib_path = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("../../release");
+
+    // Set library names based on target OS.
+    //
+    // This rigamarole is currently required because the "monero_libwallet2_api_c" library is also
+    // required under the names "wallet2_api_c" and "libmonero_libwallet2_api_c" by various parts of
+    // the stack.  This is a temporary workaround until the library is refactored to use a single
+    // name consistently.
+    let original_lib = if cfg!(target_os = "windows") {
+        lib_path.join("monero_libwallet2_api_c.dll")
+    } else if cfg!(target_os = "macos") {
+        lib_path.join("monero_libwallet2_api_c.dylib")
+    } else {
+        lib_path.join("monero_libwallet2_api_c.so")
+    };
+
+    let symlink_1 = if cfg!(target_os = "windows") {
+        lib_path.join("wallet2_api_c.dll")
+    } else if cfg!(target_os = "macos") {
+        lib_path.join("libwallet2_api_c.dylib")
+    } else {
+        lib_path.join("libwallet2_api_c.so")
+    };
+
+    let symlink_2 = if cfg!(target_os = "windows") {
+        lib_path.join("monero_wallet2_api_c.dll")
+    } else if cfg!(target_os = "macos") {
+        lib_path.join("libmonero_libwallet2_api_c.dylib")
+    } else {
+        lib_path.join("libmonero_libwallet2_api_c.so")
+    };
+
+    // On Unix-like systems, create symlinks.
+    #[cfg(unix)]
+    {
+        if original_lib.exists() && !symlink_1.exists() {
+            unix_fs::symlink(&original_lib, &symlink_1)
+                .expect("Failed to create symbolic link for libwallet2_api_c.so");
+        }
+
+        if original_lib.exists() && !symlink_2.exists() {
+            unix_fs::symlink(&original_lib, &symlink_2)
+                .expect("Failed to create symbolic link for libmonero_libwallet2_api_c.so");
+        }
+    }
+
+    // On Windows, copy the files instead of symlinking.
+    #[cfg(target_os = "windows")]
+    {
+        if original_lib.exists() && !symlink_1.exists() {
+            copy(&original_lib, &symlink_1).expect("Failed to copy DLL file to wallet2_api_c.dll");
+        }
+
+        if original_lib.exists() && !symlink_2.exists() {
+            copy(&original_lib, &symlink_2)
+                .expect("Failed to copy DLL file to monero_wallet2_api_c.dll");
+        }
+    }
 
     println!("cargo:rerun-if-changed={}", header_path);
+    println!("cargo:rerun-if-changed=build.rs");
 
-    // Configure bindgen
+    println!("cargo:rustc-link-search=native={}", lib_path.display());
+    println!("cargo:rustc-link-lib=dylib=monero_libwallet2_api_c");
+    println!("cargo:rustc-link-lib=dylib=stdc++");
+    println!("cargo:rustc-link-lib=dylib=hidapi-hidraw");
+    println!("cargo:rustc-link-arg=-Wl,-rpath,{}", lib_path.display());
+
+    // Generate bindings using bindgen.
     let bindings = bindgen::Builder::default()
         .header(header_path)
         .allowlist_function("MONERO_.*")
@@ -28,18 +101,17 @@ fn main() {
         .blocklist_type("_.*")
         .blocklist_function("__.*")
         .layout_tests(false)
-        .default_enum_style(EnumVariation::Rust {
-            non_exhaustive: false,
-        })
+        .default_enum_style(EnumVariation::Rust { non_exhaustive: false })
         .derive_default(false)
         .conservative_inline_namespaces()
         .generate_comments(false)
         .generate()
         .expect("Unable to generate bindings");
+
     let out_path = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())
         .join("src")
         .join("bindings.rs");
     bindings
-        .write_to_file(out_path)
+        .write_to_file(out_path.clone())
         .expect("Couldn't write bindings!");
 }