Hi, I’m trying to resolve a

require(…)

problem. Seems like it’s probably a bundling problem specific to sst or esbuild, and it’s beyond my skill-set so far… so any help would be awesome.   I have some code running in a lambda configured using the

sst.Queue

construct. It is calling a library that uses

proxy-agent

under the hood, loaded via

require('proxy-agent');

. This library has a transitive dependency on

vm2

(to run the PAC file, I assume).   When run with unit tests, this library call runs fine. When run under

npx sst start

, the

require

call fails like this:  

Error: ENOENT: no such file or directory, open '/Users/asquithea/repos/deploy-controller/.sst/artifacts/aff14e6d/src/handlers/contextify.js'
   at Object.openSync (node:fs:585:3)
   at Object.readFileSync (node:fs:453:35)
   at loadAndCompileScript (/Users/asquithea/repos/deploy-controller/node_modules/vm2/lib/main.js:49:18)
   at node_modules/vm2/lib/main.js (/Users/asquithea/repos/deploy-controller/node_modules/vm2/lib/main.js:76:20)
   at __require (/Users/asquithea/repos/deploy-controller/.sst/artifacts/aff14e6d/src/handlers/command.js:26:44)
   at node_modules/vm2/index.js (/Users/asquithea/repos/deploy-controller/node_modules/vm2/index.js:3:18)
   at __require (/Users/asquithea/repos/deploy-controller/.sst/artifacts/aff14e6d/src/handlers/command.js:26:44)
   at node_modules/degenerator/dist/src/index.js (/Users/asquithea/repos/deploy-controller/node_modules/degenerator/src/index.ts:6:1)
   at __require (/Users/asquithea/repos/deploy-controller/.sst/artifacts/aff14e6d/src/handlers/command.js:26:44)
   at node_modules/pac-resolver/dist/index.js (/Users/asquithea/repos/deploy-controller/node_modules/pac-resolver/src/index.ts:3:1)

  The

artifacts

directory contains only the compiled lambda (

command.ts

->

command.js

).  

contextify.js

is part of the

vm2

library, which tries to load it dynamically, like this:

contextifyScript: loadAndCompileScript(`${__dirname}/contextify.js`, '(function(require, host) { ', '\n})'),

  So this looks like a bundling problem: I guess the

vm2

library assumes a standard

node_modules

structure.  I see there are some control options for bundling in the construct, but at this point I don’t really know what I’m doing. Is this similar enough to someone else’s problem that you can offer any advice? TIA.

Not too experienced in debugging this type of issue myself - but maybe this

nodeModules

bundling option will help: https://docs.serverless-stack.com/constructs/Function#nodemodules

Success! I tried using the

copyFiles

option initially. That appears to put the file in the desired location when running

npx sst build

but not with

npx sst start

. However adding

proxy-agent

to the

node_modules

option does appear to have solved the problem. Many thx. 🌟