feat: support nodejs (#9)

* feat: support nodejs

* chore: remove useless code

Author: fu050409

.changes/nodejs.md

@@ -0,0 +1,12 @@
+---
+"eval-stack": minor:feat
+---
+
+Add support for Deno.js, and other changes:
+
+- Use deno instead of node for executing JavaScript files, deny all permissions by default.
+- Allow stderr to be piped since we can capture it for error messages.
+- Disable core dumps by default.
+- Set CPU time limits using `libc`.
+- Use seccomp to restrict sys calls and fs operations.
+- Prevent process to create subprocesses.

.cspell.json

@@ -10,10 +10,13 @@
         "NEWNS",
         "prctl",
         "PRIVS",
+        "pycache",
         "rlim",
         "rlimit",
         "rustc",
         "rustup",
+        "seccomp",
+        "seccompiler",
         "serde",
         "setrlimit",
         "SIGBUS",

Cargo.lock

@@ -15,10 +15,10 @@ anyhow = "1.0.92"
 libc = "0.2.161"
 tokio = { version = "1.41.0", features = ["full"] }
 
-nix = { version = "0.29.0", features = ["user"], optional = true }
 serde = { version = "1.0.215", features = ["derive"], optional = true }
+seccompiler = "0.4.0"
+which = "7.0.0"
 
 [features]
 default = ["serde"]
-rerun = ["nix"]
 serde = ["dep:serde"]

Cargo.toml

@@ -1,6 +1,7 @@
 use std::{fs::create_dir_all, path::PathBuf, time::Duration};
 
 use anyhow::Result;
+use which::which;
 
 use crate::{
     compile::{compile, Language},
@@ -31,7 +32,8 @@ where
         .to_string_lossy()
         .to_string();
     let exec_path = match &language {
-        Language::Python => PathBuf::from("python"),
+        Language::Python => which("python")?,
+        Language::NodeJs => which("deno")?,
         _ => workspace.join("out"),
     };
 
@@ -52,9 +54,20 @@ where
         }]);
     };
 
-    let args = vec![source_file_path.as_str()];
+    let py_args = vec![source_file_path.as_str()];
+    let deno_args = vec![
+        "run",
+        format!("--v8-flags=--max-old-space-size={}", options.memory_limit).leak(),
+        "--deny-read=*",
+        "--deny-write=*",
+        "--deny-env=*",
+        "--deny-run=*",
+        "--deny-ffi=*",
+        source_file_path.as_str(),
+    ];
     let args = match language {
-        Language::Python => Some(&args),
+        Language::Python => Some(&py_args),
+        Language::NodeJs => Some(&deno_args),
         _ => None,
     }
     .map(|v| &**v);
@@ -73,7 +86,7 @@ where
             workspace.join("test.out"),
         )
         .await?;
-        if options.fast_fail && !matches!(result.status, JudgeStatus::Accepted) {
+        if options.fail_fast && !matches!(result.status, JudgeStatus::Accepted) {
             results.push(result);
             break;
         }