write the review-classifier fake agent scripts from a child process

swarm-review-classifier/src/acp.rs

@@ -274,8 +274,6 @@ impl Sink for FinalText {
 
 #[cfg(test)]
 mod tests {
-    use std::os::unix::fs::PermissionsExt as _;
-
     use swarm_wire::review_classifier::Prices;
 
     use super::*;
@@ -347,12 +345,10 @@ done
     fn acp(dir: &Path) -> (Acp<Arc<Costs>>, Arc<Costs>) {
         let script = dir.join("agent.sh");
         let log = dir.join("log");
-        std::fs::write(
+        crate::test_script::write_executable(
             &script,
-            AGENT.replacen("log=\"$1\"", &format!("log='{}'", log.display()), 1),
-        )
-        .expect("written");
-        std::fs::set_permissions(&script, std::fs::Permissions::from_mode(0o755)).expect("chmod");
+            &AGENT.replacen("log=\"$1\"", &format!("log='{}'", log.display()), 1),
+        );
         let costs = Arc::new(Costs::default());
         let acp = Acp {
             program: PathBuf::from("/nix/store/x-opencode/bin/opencode"),