use fs_extra to avoid fs errors on ci

Cargo.toml

@@ -8,6 +8,7 @@ description = "a programming language for writing zkapps"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [build-dependencies]
+fs_extra = "1.3.0"
 dirs = "4.0"
 
 [dependencies]

build.rs

@@ -1,23 +1,6 @@
-use std::{
-    env, fs,
-    path::{Path, PathBuf},
-};
+use std::{env, path::PathBuf};
 
-// Copy a folder recursively
-fn copy_recursively(src: &Path, dst: &Path) -> std::io::Result<()> {
-    if src.is_dir() {
-        fs::create_dir_all(dst)?;
-        for entry in fs::read_dir(src)? {
-            let entry = entry?;
-            let entry_path = entry.path();
-            let dest_path = dst.join(entry.file_name());
-            copy_recursively(&entry_path, &dest_path)?;
-        }
-    } else {
-        fs::copy(src, dst)?;
-    }
-    Ok(())
-}
+use fs_extra::dir::{self, CopyOptions};
 
 fn main() {
     let home_dir: PathBuf =
@@ -26,15 +9,19 @@ fn main() {
     let noname_dir = home_dir.join(".noname");
     let release_dir = noname_dir.join("release");
 
-    // if it exists, then revmove it
+    // If it exists, then remove it
     if release_dir.exists() {
-        fs::remove_dir_all(&release_dir).expect("could not remove release directory");
+        fs_extra::remove_items(&[&release_dir]).expect("could not remove release directory");
     }
 
-    // copy the current folder to the release directory
-    fs::create_dir_all(&release_dir).expect("could not create release directory");
-
     let current_dir = env::current_dir().expect("could not get current directory");
-    copy_recursively(&current_dir, &release_dir)
+
+    // Set up copy options
+    let mut options = CopyOptions::new();
+    options.overwrite = true; // Overwrite existing files
+    options.copy_inside = true; // Copy contents inside the source directory
+
+    // Copy the current folder to the release directory
+    dir::copy(current_dir, &release_dir, &options)
         .expect("could not copy current directory to release directory");
 }

src/backends/kimchi/mod.rs

@@ -771,6 +771,6 @@ impl Backend for KimchiVesta {
         msg: String,
         span: Span,
     ) {
-        todo!()
+        println!("todo: implement log_var for kimchi backend");
     }
 }