Use reflinks when supported

Cargo.lock

@@ -727,6 +727,15 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "reflink"
+version = "0.1.3"
+source = "git+https://github.com/nicokoch/reflink?rev=e8d93b465f5d9ad340cd052b64bbc77b8ee107e2#e8d93b465f5d9ad340cd052b64bbc77b8ee107e2"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.9"
@@ -1156,6 +1165,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "goblin",
+ "reflink",
  "serde",
  "toml",
 ]

xtask/Cargo.toml

@@ -8,5 +8,7 @@ license = "ISC"
 [dependencies]
 anyhow = "1.0"
 goblin = "0.5"
+# Version 0.1.3 from crates.io assumes a 64-bit toolchain
+reflink = { git = "https://github.com/nicokoch/reflink", rev = "e8d93b465f5d9ad340cd052b64bbc77b8ee107e2" }
 serde = { version = "1.0", features = ["derive"] }
 toml = "0.5"

xtask/src/main.rs

@@ -141,7 +141,8 @@ fn bundle(package: &str, args: &[String]) -> Result<()> {
 
         fs::create_dir_all(vst3_lib_path.parent().unwrap())
             .context("Could not create bundle directory")?;
-        fs::copy(&lib_path, &vst3_lib_path).context("Could not copy library to bundle")?;
+        reflink::reflink_or_copy(&lib_path, &vst3_lib_path)
+            .context("Could not copy library to bundle")?;
 
         maybe_create_macos_vst3_bundle(package, cross_compile_target.as_deref())?;