+++ /dev/null
---- a/src/bootstrap/bootstrap.py
-+++ b/src/bootstrap/bootstrap.py
-@@ -557,7 +557,7 @@ class RustBuild(object):
- shutil.rmtree(bin_root)
-
- key = self.stage0_compiler.date
-- cache_dst = os.path.join(self.build_dir, "cache")
-+ cache_dst = os.getenv('OPENWRT_RUSTC_BOOTSTRAP_CACHE', os.path.join(self.build_dir, "cache"))
- rustc_cache = os.path.join(cache_dst, key)
- if not os.path.exists(rustc_cache):
- os.makedirs(rustc_cache)
---- a/src/bootstrap/src/core/download.rs
-+++ b/src/bootstrap/src/core/download.rs
-@@ -208,10 +208,13 @@ impl Config {
- Some(other) => panic!("unsupported protocol {other} in {url}"),
- None => panic!("no protocol in {url}"),
- }
-- t!(
-- std::fs::rename(&tempfile, dest_path),
-- format!("failed to rename {tempfile:?} to {dest_path:?}")
-- );
-+ match std::fs::rename(&tempfile, dest_path) {
-+ Ok(v) => v,
-+ Err(_) => {
-+ t!(std::fs::copy(&tempfile, dest_path));
-+ t!(std::fs::remove_file(&tempfile));
-+ }
-+ };
- }
-
- fn download_http_with_retries(&self, tempfile: &Path, url: &str, help_on_error: &str) {
-@@ -577,7 +580,10 @@ impl Config {
- return;
- }
-
-- let cache_dst = self.out.join("cache");
-+ let cache_dst = match env::var_os("OPENWRT_RUSTC_BOOTSTRAP_CACHE") {
-+ Some(v) => PathBuf::from(v),
-+ None => self.out.join("cache"),
-+ };
- let cache_dir = cache_dst.join(key);
- if !cache_dir.exists() {
- t!(fs::create_dir_all(&cache_dir));
-@@ -704,7 +710,10 @@ download-rustc = false
- let llvm_assertions = self.llvm_assertions;
-
- let cache_prefix = format!("llvm-{llvm_sha}-{llvm_assertions}");
-- let cache_dst = self.out.join("cache");
-+ let cache_dst = match env::var_os("OPENWRT_RUSTC_BOOTSTRAP_CACHE") {
-+ Some(v) => PathBuf::from(v),
-+ None => self.out.join("cache"),
-+ };
- let rustc_cache = cache_dst.join(cache_prefix);
- if !rustc_cache.exists() {
- t!(fs::create_dir_all(&rustc_cache));