Cannot open file `app_engine_key.proto` after build with esbuild

[giangm9]

I was making a Google AppEngine project. I use the google app datastore as the following code

import { Datastore } from "@google-cloud/datastore";

then bundle using https://esbuild.github.io/
After that, an error occurred

  + node --enable-source-maps server.js dev
Error: ENOENT: no such file or directory, open '/home/gl/protos/app_engine_key.proto'
    at Object.openSync (fs.js:476:3)
    at Object.readFileSync (fs.js:377:35)

Environment details

• OS: Ubuntu 20.0 (wsl)
• Node.js version: 14
• npm version: 6.14.10
• @google-cloud/datastore version: 6.3.1

Steps to reproduce

1. esbuild src/server/index.tsx --minify --bundle --jsx-factory=h --log-level=error --color=true --sourcemap --platform=node --outfile=server.js
2. node --enable-source-maps server.js dev

[stephenplusplus]

Hi @giangm9. Thank you for reporting, and sorry for the delay. This module, and others that we use in our client libraries, require .proto files. These are included with the module in the published npm package. From the module's source files, the proto files are located with Node's built-in directory traversing mechanisms, such as the magic variable __dirname. That becomes an issue with esbuild, because when it bundles all of the source code files into one, it removes the directory hierarchy that our modules expect to exist.

Unfortunately, I'm not very familiar with esbuild-- do you know if there's a way to work around this type of problem?

[stephenplusplus]

@bcoe do you know if we are able to support this type of use?

[bcoe]

@alexander-fenster @summer-ji-eng is this a use case that's supported now, by virtue of us shipping JSON versions of protos files (am I imagining that we made this change?).

[agektmr]

I'm bumping into this exact issue. I'm using webpack + typescript.
I copied /protos/app_engine_key.proto separately to the project root folder, but no luck.
I imagine my webpack configuration lacks something but I'm not too familiar with how it works.
Any advice?

[agektmr]

I just realized I don't need to bundle server side code. Please ignore my question.

[crwilcox]

@bcoe @alexander-fenster ?