Fix release perms

Author: littledivy

.github/workflows/release.yml

@@ -4,6 +4,9 @@ on:
   push:
     tags: [ '**' ]
 
+permissions:
+  contents: write
+
 env:
   CARGO_TERM_COLOR: always
 

build.rs

@@ -1,4 +1,12 @@
+use std::env;
+use std::path::PathBuf;
+
 fn main() {
+    if cfg!(target_os = "windows") {
+        download_prebuilt();
+        return;
+    }
+
     let mut config = cmake::Config::new(".");
     config
         .define("BUILD_SHARED_LIBS", "OFF")
@@ -15,3 +23,90 @@ fn main() {
     #[cfg(target_os = "macos")]
     println!("cargo:rustc-link-lib=dylib=c++");
 }
+
+fn download_prebuilt() {
+  let url = static_lib_url();
+  println!("Downloading prebuilt lib from {}", url);
+
+  let out_dir = static_lib_dir();
+  std::fs::create_dir_all(&out_dir).unwrap();
+  println!("cargo:rustc-link-search={}", out_dir.display());
+
+  match std::fs::read_to_string(static_checksum_path()) {
+    Ok(c) if c.trim() == url => {
+      println!("Using cached prebuilt lib");
+      return;
+    }
+    _ => {}
+  };
+
+  let curl = std::process::Command::new("curl")
+    .arg("-L")
+    .arg("-o")
+    .arg(out_dir.join("sui.lib.gz"))
+    .arg(url)
+    .status()
+    .expect("Failed to download prebuilt lib");
+  assert!(curl.success());
+
+  std::fs::write(static_checksum_path(), url).unwrap();
+}
+
+fn static_lib_name() -> &'static str {
+  let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
+  if target_os == "windows" {
+    "sui.lib"
+  } else {
+    "libsui.a"
+  }
+}
+
+fn static_lib_path() -> PathBuf {
+  static_lib_dir().join(static_lib_name())
+}
+
+fn static_lib_dir() -> PathBuf {
+  build_dir().join("out")
+}
+
+fn static_checksum_path() -> PathBuf {
+  let mut t = static_lib_path();
+  t.set_extension("sum");
+  t
+}
+
+fn build_dir() -> PathBuf {
+  let root = env::current_dir().unwrap();
+
+  let out_dir = env::var_os("OUT_DIR").expect(
+    "The 'OUT_DIR' environment is not set (it should be something like \
+     'target/debug/sui-{hash}').",
+  );
+  let out_dir_abs = root.join(out_dir);
+
+  // This would be target/debug or target/release
+  out_dir_abs
+    .parent()
+    .unwrap()
+    .parent()
+    .unwrap()
+    .parent()
+    .unwrap()
+    .to_path_buf()
+}
+
+
+fn static_lib_url() -> String {
+  let default_base = "https://github.com/littledivy/sui/releases/download";
+  let base =
+    env::var("SUI_MIRROR").unwrap_or_else(|_| default_base.into());
+  let version = env::var("CARGO_PKG_VERSION").unwrap();
+  let target = env::var("TARGET").unwrap();
+  let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
+  // Note: we always use the release build on windows.
+  if target_os == "windows" {
+    return format!("{}/v{}/sui_release_{}.lib.gz", base, version, target);
+  }
+
+  unimplemented!()
+}