Add Docker support

Author: Menci

.dockerignore

@@ -0,0 +1,5 @@
+/.vscode
+/node_modules
+/lib
+/.git
+/Dockerfile

Dockerfile

@@ -0,0 +1,36 @@
+FROM node:10-buster
+
+# Download and extract Sandbox RootFS (as the first-step!)
+COPY sandbox-rootfs-url.txt /
+RUN apt-get update && \
+    apt-get install -y wget && \
+    wget -O /sandbox-rootfs.tar.xz "$(cat /sandbox-rootfs-url.txt)" && \
+    tar xf /sandbox-rootfs.tar.xz -C /
+
+# Install OS dependencies
+RUN apt-get update && \
+    apt-get install -y build-essential libboost-all-dev
+
+WORKDIR /app
+
+# Install NPM dependencies
+COPY package.json yarn.lock ./
+RUN yarn --frozen-lockfile
+
+# Copy code and build
+COPY . .
+RUN yarn build
+
+ENV NODE_ENV=production \
+    SYZOJ_JUDGE_RUNNER_INSTANCE=runner \
+    SYZOJ_JUDGE_SANDBOX_ROOTFS_PATH=/rootfs \
+    SYZOJ_JUDGE_WORKING_DIRECTORY=/tmp/working \
+    SYZOJ_JUDGE_BINARY_DIRECTORY=/tmp/binary \
+    SYZOJ_JUDGE_TESTDATA_PATH=/app/testdata \
+    SYZOJ_JUDGE_DO_NOT_USE_X32_ABI=true
+
+VOLUME ["/app/config", "/app/testdata"]
+
+COPY ./docker-entrypoint.sh /
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["daemon"]

docker-entrypoint.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -e
+
+CMD="$1"
+shift
+
+if [[ "$CMD" == "daemon" ]]; then
+  exec /usr/local/bin/node /app/lib/daemon \
+         -c /app/config/judge-daemon.json \
+         "$@"
+elif [[ "$CMD" == "runner" ]]; then
+  exec /usr/local/bin/node /app/lib/runner \
+         -s /app/config/runner-shared.json \
+         -i "/app/config/runner-instance-${SYZOJ_JUDGE_RUNNER_INSTANCE:-1}.json" \
+         "$@"
+else
+  echo "Unsupport command: $CMD"
+  exit 2
+fi

sandbox-rootfs-url.txt

@@ -0,0 +1 @@
+https://github.com/syzoj/sandbox-rootfs/releases/download/210521/sandbox-rootfs-210521.tar.xz

src/utils.ts

@@ -1,5 +1,4 @@
 import * as fse from 'fs-extra';
-import * as pathLib from 'path';
 import util = require('util');
 import sha256 = require('crypto-js/sha256');
 import nodeStream = require('stream');
@@ -9,10 +8,14 @@ import { exec, execFile } from "child_process";
 const execAsync = (util as any).promisify(exec);
 const execFileAsync = (util as any).promisify(execFile);
 
+function getSystemExecutable(program: string) {
+    return fse.pathExistsSync(`/bin/${program}`) ? `/bin/${program}` : `/usr/bin/${program}`
+}
+
 export async function emptyDir(dirName: string): Promise<void> {
 	for (let i = 0; i < 10; i++) {
 		try {
-			await execAsync("/bin/find . -mindepth 1 -delete", { cwd: dirName });
+			await execAsync(`${getSystemExecutable("find")} . -mindepth 1 -delete`, { cwd: dirName });
 			return;
 		} catch (e) {
 			if (i === 9) throw e;
@@ -23,11 +26,11 @@ export async function emptyDir(dirName: string): Promise<void> {
 }
 
 export async function remove(filename: string): Promise<void> {
-    await execFileAsync("/bin/rm", ["-rf", "--", filename]);
+    await execFileAsync(getSystemExecutable("rm"), ["-rf", "--", filename]);
 }
 
 export async function getFolderSize(dirName: string): Promise<number> {
-    const result = await execAsync("/usr/bin/du -sb . | /usr/bin/cut -f1", { cwd: dirName });
+    const result = await execAsync(`${getSystemExecutable("du")} -sb . | ${getSystemExecutable("cut")} -f1`, { cwd: dirName });
     return Number(result.stdout) || 0;
 }