add code download route

build.rs

@@ -0,0 +1,46 @@
+use std::{
+    env,
+    fs::File,
+    io::{Read, Write},
+    path::Path,
+};
+
+use ignore::Walk;
+use zip::{CompressionMethod, write::SimpleFileOptions};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let out_dir = env::var("OUT_DIR")?;
+    let src_dir = ".";
+
+    let zip_path = Path::new(&out_dir).join("archive.zip");
+    let zip_file = File::create(zip_path)?;
+
+    let walkdir = Walk::new(src_dir);
+    let it = walkdir.into_iter();
+
+    let mut zip = zip::ZipWriter::new(zip_file);
+
+    let options = SimpleFileOptions::default()
+        .compression_method(CompressionMethod::Deflated)
+        .unix_permissions(0o755);
+
+    for entry in it {
+        let entry = entry?;
+        let path = entry.path();
+        let name = path.strip_prefix(Path::new(src_dir))?;
+
+        if path.is_file() {
+            zip.start_file(name.to_str().unwrap(), options)?;
+            let mut f = File::open(path)?;
+            let mut buffer = Vec::new();
+            f.read_to_end(&mut buffer)?;
+            zip.write_all(&buffer)?;
+        } else if !name.as_os_str().is_empty() {
+            zip.add_directory(name.to_str().unwrap(), options)?;
+        }
+    }
+    zip.finish()?;
+    println!("cargo:rerun-if-changed={}", src_dir);
+
+    Ok(())
+}