use a thread in the build script of serde_codegen to allow env vars to control the stack size

serde_codegen/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_codegen"
-version = "0.8.0"
+version = "0.8.1"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "Macros to auto-generate implementations for the serde framework"

serde_codegen/build.rs

@@ -4,14 +4,17 @@ mod inner {
 
     use std::env;
     use std::path::Path;
+    use std::thread::spawn;
 
     pub fn main() {
-        let out_dir = env::var_os("OUT_DIR").unwrap();
+        // put everything into a thread, so users can use `RUST_MIN_STACK` to increase the amount of stack
+        spawn(|| {
+            let out_dir = env::var_os("OUT_DIR").unwrap();
 
-        let src = Path::new("src/lib.rs.in");
+            let src = Path::new("src/lib.rs.in");
-        let dst = Path::new(&out_dir).join("lib.rs");
+            let dst = Path::new(&out_dir).join("lib.rs");
-
+            quasi_codegen::expand(&src, &dst).unwrap();
-        quasi_codegen::expand(&src, &dst).unwrap();
+        }).join().unwrap()
     }
 }
 

serde_macros/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_macros"
-version = "0.8.0"
+version = "0.8.1"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "Macros to auto-generate implementations for the serde framework"
@@ -28,7 +28,7 @@ skeptic = { version = "^0.6.0", optional = true }
 
 [dependencies]
 clippy = { version = "^0.*", optional = true }
-serde_codegen = { version = "=0.8.0", default-features = false, features = ["unstable"] }
+serde_codegen = { version = "=0.8.1", default-features = false, features = ["unstable"] }
 skeptic = { version = "^0.6.0", optional = true }
 serde_json = { version = "0.8.0", optional = true }