Failed to run a compiled nest app

[xyber-nova]

Version: Deno 2.2.4

With default nest.js template. Only changed main.js as

import { NestFactory } from '@nestjs/core';
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);

  const swaggerConfig = new DocumentBuilder()
    .setTitle('Backend API')
    .setDescription('The Backend')
    .setVersion('0.0.1-alpha.1')
    .build();

  const documentFactory = () => SwaggerModule.createDocument(app, swaggerConfig)

  SwaggerModule.setup('docs', app, documentFactory);

  await app.listen(process.env.PORT ?? 3000);
}
bootstrap();

and tsconfig.json

{
  "compilerOptions": {
    "module": "ES2022",
    "moduleResolution": "bundler",
    "declaration": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "target": "ES2023",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "incremental": true,
    "skipLibCheck": true,
    "strictNullChecks": true,
    "forceConsistentCasingInFileNames": true,
    "noImplicitAny": false,
    "strictBindCallApply": false,
    "noFallthroughCasesInSwitch": false
  }
}

How to Replication

1. run command deno run build
2. run command deno compile --unstable-sloppy-imports -A --include dist/ --output dist.bin dist/main.js
3. execute dist.bin
4. try to open the swagger ui

Note

I can get the expected behavior when use deno dist/main.ts, but unexpected when use binary.

[dsherret]

Can you add the error you get or what goes wrong?

[xyber-nova]

here are error messages.

error: Uncaught (in promise) TypeError: Cannot read properties of null (reading 'toUTCString')
    var modified = stat.mtime.toUTCString()
                              ^
    at SendStream.setHeader (file:///tmp/deno-compile-dist.bin/node_modules/.deno/[email protected]/node_modules/send/index.js:759:31)
    at SendStream.send (file:///tmp/deno-compile-dist.bin/node_modules/.deno/[email protected]/node_modules/send/index.js:509:8)
    at onstat (file:///tmp/deno-compile-dist.bin/node_modules/.deno/[email protected]/node_modules/send/index.js:616:10)
    at Deno.stat.then.denoErrorToNodeError.syscall (ext:deno_node/_fs/_fs_stat.ts:151:32)
    at eventLoopTick (ext:core/01_core.js:177:7)

the error may because fs.stat cannot be used in self contained executable?

// file:///tmp/deno-compile-dist.bin/node_modules/.deno/[email protected]/node_modules/send/index.js:616:10
  fs.stat(path, function onstat (err, stat) {
    var pathEndsWithSep = path[path.length - 1] === sep
    if (err && err.code === 'ENOENT' && !extname(path) && !pathEndsWithSep) {
      // not found, check extensions
      return next(err)
    }
    if (err) return self.onStatError(err)
    if (stat.isDirectory()) return self.redirect(path)
    if (pathEndsWithSep) return self.error(404)
    self.emit('file', path, stat)
    self.send(path, stat)
  })

[xyber-nova]

most the information not contained to the executable file.

// debug information from the executable file
stat Stats {
  dev: 0,
  ino: 0,
  mode: 0,
  nlink: 0,
  uid: 0,
  gid: 0,
  rdev: 0,
  size: 154985,
  blksize: 0,
  blocks: 0,
  mtime: null,
  atime: null,
  birthtime: null,
  mtimeMs: null,
  atimeMs: null,
  birthtimeMs: null,
  isFile: [Function: isFile],
  isDirectory: [Function: isDirectory],
  isSymbolicLink: [Function: isSymbolicLink],
  isBlockDevice: [Function: isBlockDevice],
  isFIFO: [Function: isFIFO],
  isCharacterDevice: [Function: isCharacterDevice],
  isSocket: [Function: isSocket],
  ctime: null,
  ctimeMs: null
}

// normally run
stat Stats {
  dev: 2080,
  ino: 815699,
  mode: 33188,
  nlink: 2,
  uid: 1000,
  gid: 1000,
  rdev: 0,
  size: 154985,
  blksize: 4096,
  blocks: 304,
  mtime: 1985-10-26T08:15:00.000Z,
  atime: 2025-03-20T16:02:40.530Z,
  birthtime: 2025-03-20T16:02:40.330Z,
  mtimeMs: 499162500000,
  atimeMs: 1742486560530,
  birthtimeMs: 1742486560330,
  isFile: [Function: isFile],
  isDirectory: [Function: isDirectory],
  isSymbolicLink: [Function: isSymbolicLink],
  isBlockDevice: [Function: isBlockDevice],
  isFIFO: [Function: isFIFO],
  isCharacterDevice: [Function: isCharacterDevice],
  isSocket: [Function: isSocket],
  ctime: 2025-03-20T16:02:40.000Z,
  ctimeMs: 1742486560000
}

[dsherret]

Thank you. It helps to see what the error is because that often gives an idea on what the fix is.

In this case, probably these values should be hardcoded with the date that the compiled executable was made:

deno/cli/rt/file_system.rs

Lines 1257 to 1260 in 60b502d

	atime: None,
	birthtime: None,
	mtime: None,
	ctime: None,

[xyber-nova]

yes. And according the definition of fs.Stats, it should be a number. null value is a unexpected behavior.

I think I can create a PR to fix it.

[dsherret]

I think I can create a PR to fix it.

That would be helpful. Thanks!

I think as a quick fix we could just use std::sync::OnceLock and store the first accessed time, but ideally we could just store the time in

deno/cli/lib/standalone/binary.rs

Line 75 in 60b502d

pub struct Metadata {

then surface that there.

[xyber-nova]

I think I can create a PR to fix it.

That would be helpful. Thanks!

I think as a quick fix we could just use std::sync::OnceLock and store the first accessed time, but ideally we could just store the time in

deno/cli/lib/standalone/binary.rs

Line 75 in 60b502d

pub struct Metadata {

then surface that there.

yeah. I think we can storage a metadata called build_time in the binary file, and surface them in FsStats of VfsFiles.

Also I think deno can add a interface in stdlib to get compile-time data like env! macro in rust. It maybe useful when identity informations of backend application in production I thought.

[xyber-nova]

For convenience, I will use Box::leak to create a globally OnceLock<&'static Metadata> static variable and use it.