piston/cli/commands/execute.js

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const fs = require('fs');
const path = require('path');
const chalk = require('chalk');
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const WebSocket = require('ws');
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const SIGNALS = [
'SIGABRT',
'SIGALRM',
'SIGBUS',
'SIGCHLD',
'SIGCLD',
'SIGCONT',
'SIGEMT',
'SIGFPE',
'SIGHUP',
'SIGILL',
'SIGINFO',
'SIGINT',
'SIGIO',
'SIGIOT',
'SIGLOST',
'SIGPIPE',
'SIGPOLL',
'SIGPROF',
'SIGPWR',
'SIGQUIT',
'SIGSEGV',
'SIGSTKFLT',
'SIGTSTP',
'SIGSYS',
'SIGTERM',
'SIGTRAP',
'SIGTTIN',
'SIGTTOU',
'SIGUNUSED',
'SIGURG',
'SIGUSR1',
'SIGUSR2',
'SIGVTALRM',
'SIGXCPU',
'SIGXFSZ',
'SIGWINCH',
];
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exports.command = ['execute <language> <file> [args..]'];
exports.aliases = ['run'];
exports.describe = 'Executes file with the specified runner';
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exports.builder = {
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language_version: {
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string: true,
desc: 'Set the version of the language to use',
alias: ['l'],
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default: '*',
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},
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stdin: {
boolean: true,
desc: 'Read input from stdin and pass to executor',
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alias: ['i'],
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},
run_timeout: {
alias: ['rt', 'r'],
number: true,
desc: 'Milliseconds before killing run process',
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default: 3000,
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},
compile_timeout: {
alias: ['ct', 'c'],
number: true,
desc: 'Milliseconds before killing compile process',
default: 10000,
},
files: {
alias: ['f'],
array: true,
desc: 'Additional files to add',
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},
interactive: {
boolean: true,
alias: ['t'],
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desc: 'Run interactively using WebSocket transport',
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},
status: {
boolean: true,
alias: ['s'],
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desc: 'Output additional status to stderr',
},
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};
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async function handle_interactive(files, argv) {
const ws = new WebSocket(
argv.pistonUrl.replace('http', 'ws') + '/api/v2/connect'
);
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const log_message =
process.stderr.isTTY && argv.status ? console.error : () => {};
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process.on('exit', () => {
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ws.close();
process.stdin.end();
process.stdin.destroy();
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process.exit();
});
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for (const signal of SIGNALS) {
process.on(signal, () => {
ws.send(JSON.stringify({ type: 'signal', signal }));
});
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}
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ws.on('open', () => {
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const request = {
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type: 'init',
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language: argv.language,
version: argv['language_version'],
files: files,
args: argv.args,
compile_timeout: argv.ct,
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run_timeout: argv.rt,
};
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ws.send(JSON.stringify(request));
log_message(chalk.white.bold('Connected'));
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process.stdin.resume();
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process.stdin.on('data', data => {
ws.send(
JSON.stringify({
type: 'data',
stream: 'stdin',
data: data.toString(),
})
);
});
});
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ws.on('close', (code, reason) => {
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log_message(
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chalk.white.bold('Disconnected: '),
chalk.white.bold('Reason: '),
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chalk.yellow(`"${reason}"`),
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chalk.white.bold('Code: '),
chalk.yellow(`"${code}"`)
);
process.stdin.pause();
});
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ws.on('message', function (data) {
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const msg = JSON.parse(data);
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switch (msg.type) {
case 'runtime':
log_message(
chalk.bold.white('Runtime:'),
chalk.yellow(`${msg.language} ${msg.version}`)
);
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break;
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case 'stage':
log_message(
chalk.bold.white('Stage:'),
chalk.yellow(msg.stage)
);
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break;
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case 'data':
if (msg.stream == 'stdout') process.stdout.write(msg.data);
else if (msg.stream == 'stderr') process.stderr.write(msg.data);
else log_message(chalk.bold.red(`(${msg.stream}) `), msg.data);
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break;
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case 'exit':
if (msg.signal === null)
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log_message(
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chalk.white.bold('Stage'),
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chalk.yellow(msg.stage),
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chalk.white.bold('exited with code'),
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chalk.yellow(msg.code)
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);
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else
log_message(
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chalk.white.bold('Stage'),
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chalk.yellow(msg.stage),
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chalk.white.bold('exited with signal'),
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chalk.yellow(msg.signal)
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);
break;
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default:
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log_message(chalk.red.bold('Unknown message:'), msg);
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}
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});
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}
async function run_non_interactively(files, argv) {
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const stdin =
(argv.stdin &&
(await new Promise((resolve, _) => {
let data = '';
process.stdin.on('data', d => (data += d));
process.stdin.on('end', _ => resolve(data));
}))) ||
'';
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const request = {
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language: argv.language,
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version: argv['language_version'],
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files: files,
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args: argv.args,
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stdin,
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compile_timeout: argv.ct,
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run_timeout: argv.rt,
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};
let { data: response } = await argv.axios.post('/api/v2/execute', request);
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const step = (name, ctx) => {
console.log(chalk.bold(`== ${name} ==`));
if (ctx.stdout) {
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console.log(chalk.bold(`STDOUT`));
console.log(ctx.stdout.replace(/\n/g, '\n '));
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}
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if (ctx.stderr) {
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console.log(chalk.bold(`STDERR`));
console.log(ctx.stderr.replace(/\n/g, '\n '));
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}
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if (ctx.code) {
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console.log(
chalk.bold(`Exit Code:`),
chalk.bold[ctx.code > 0 ? 'red' : 'green'](ctx.code)
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);
}
if (ctx.signal) {
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console.log(chalk.bold(`Signal:`), chalk.bold.yellow(ctx.signal));
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}
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};
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if (response.compile) {
step('Compile', response.compile);
}
step('Run', response.run);
}
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exports.handler = async argv => {
const files = [...(argv.files || []), argv.file].map(file_path => {
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const buffer = fs.readFileSync(file_path);
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const encoding =
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(buffer
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.toString()
.split('')
.some(x => x.charCodeAt(0) >= 128) &&
'base64') ||
'utf8';
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return {
name: path.basename(file_path),
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content: buffer.toString(encoding),
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encoding,
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};
});
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if (argv.interactive) await handle_interactive(files, argv);
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else await run_non_interactively(files, argv);
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};