judge: ignore tmpfs error

packages/hydrojudge/package.json

@@ -1,11 +1,8 @@
 {
     "name": "@hydrooj/hydrojudge",
-    "version": "2.0.13",
+    "version": "2.0.14",
     "main": "package.json",
     "author": "masnn",
-    "os": [
-        "linux"
-    ],
     "dependencies": {
         "axios": "^0.20.0",
         "bson": "^4.1.0",

packages/hydrojudge/src/sysinfo.ts

@@ -20,6 +20,7 @@ const cache: any = {};
 
 async function stackSize() {
     let output = '';
+    try {
         const context: any = {
             lang: 'ccWithoutO2',
             code: `#include <iostream>
@@ -51,6 +52,9 @@ int main(){
         for (const clean of context.clean) await clean().catch();
         tmpfs.umount(context.tmpdir);
         fs.removeSync(context.tmpdir);
+    } catch (e) {
+        return -1;
+    }
     const a = output.split(' ');
     return parseInt(a[a.length - 2], 10);
 }

packages/hydrojudge/src/tmpfs.ts

@@ -1,11 +1,17 @@
 import child from 'child_process';
 import fs from 'fs-extra';
+import os from 'os';
+import { Logger } from 'hydrooj/dist/logger';
+
+const logger = new Logger('judge');
+const linux = os.platform() === 'linux';
+if (!linux) logger.warn('Not running on linux. tmpfs disabled.');
 
 export function mount(path: string, size = '32m') {
     fs.ensureDirSync(path);
-    child.execSync(`mount tmpfs ${path} -t tmpfs -o size=${size}`);
+    if (linux) child.execSync(`mount tmpfs ${path} -t tmpfs -o size=${size}`);
 }
 
 export function umount(path: string) {
-    child.execSync(`umount ${path}`);
+    if (linux) child.execSync(`umount ${path}`);
 }