make tmp direcotry default to cache dir in mac

crates/irust/src/utils.rs

@@ -388,6 +388,11 @@ pub mod irust_dirs {
         if let Ok(dir) = std::env::var("IRUST_TEMP_DIR") {
             return dir.into();
         }
+        // On macOS, binaries inside the default temp directory can't acess the outside filesystem
+        // so we use the cache directory instead
+        if cfg!(target_os = "macos") {
+            return dirs::cache_dir().unwrap_or_else(std::env::temp_dir);
+        }
         std::env::temp_dir()
     }
 }

crates/irust_repl/Cargo.toml

@@ -12,6 +12,9 @@ license = "MIT"
 serde = { version = "1.0.188", features = ["derive"], optional = true }
 uuid = { version = "1.4.1", features = ["v4"] }
 
+[target.'cfg(target_os = "macos")'.dependencies]
+dirs = "5.0.1"
+
 [dev-dependencies]
 serde = { version = "1.0.188", features = ["derive"] }
 serde_json = "1.0.105"

crates/irust_repl/src/cargo_cmds.rs

@@ -57,7 +57,16 @@ impl CargoPaths {
         let tmp_dir = if let Ok(dir) = std::env::var("IRUST_TEMP_DIR") {
             dir.into()
         } else {
-            std::env::temp_dir()
+            // On macOS, binaries inside the default temp directory can't acess the outside filesystem
+            // so we use the cache directory instead
+            #[cfg(target_os = "macos")]
+            {
+                dirs::cache_dir().unwrap_or_else(std::env::temp_dir);
+            }
+            #[cfg(not(target_os = "macos"))]
+            {
+                std::env::temp_dir()
+            }
         };
         let common_root = tmp_dir.join("irust_repls");
         let irust_dir = common_root.join(name);