BullMQ fails to build with Bun about bun HOT 5 OPEN

I ran into this error too, the BullMQ method that @Curetix mentions seems to hold a clue; the method's comment references a discussion on stack overflow which states;

Node publishes all the module search paths to module.paths. We can traverse these and pick the first one that resolves.

It would appear that Bun follows this behavior only when running.
When building/compiling the 'module' global seems to be replaced somehow, which suggests to me it may not be recognized or set as a global.

A simple test file confirms this;

// index.ts
console.log(module.paths);

When launched with bun run this will produce an array output.
When built via bun build --target bun --outfile out.js index.ts and subsequently run via bun run out.js this produces undefined.

@knajjars I suggest you change the title of your bug report so to something like module.paths not set when using bun build - surely there will be modules other than BullMQ suffering from this bug.

EDIT: There seems to be a bit more to it; apparently this is caused by BullMQ using the module.paths to dynamically load Lua files onto the Redis instance, which would hide these files from the Bun bundler. These would need to be turned into assets by the bundler somehow.

from bun.

I'm getting the same error from a bundled BullMQ server script. Running the TS file directly works fine, but building (with target bun) and then running it throws ReferenceError: Can't find variable: module_script_loader.

Seems to be caused by this function, which gets bundled to this:

var getPkgJsonDir = function() {
  for (const modPath of module_script_loader.paths || []) {
    try {
      const prospectivePkgJsonDir = path3.dirname(modPath);
      fs2.accessSync(modPath, fs2.constants.F_OK);
      return prospectivePkgJsonDir;
    } catch (e) {
    }
  }
  return "";
};

from bun.

Any news on this ?

from bun.

Same error

from bun.

Using --compile I get:

ReferenceError: Can't find variable: module_script_loader
      at getPkgJsonDir (/$bunfs/root/cli:46442:25)
      at new ScriptLoader (/$bunfs/root/cli:46509:21)
      at /$bunfs/root/cli:46722:20

from bun.