[bug]: upwardPath not found error

[zeina99]

Describe the bug

Whenever trying to launch an upward-js server using the command npx upward-js-server I get an error saying the following:

Error: upwardPath is required
    at createUpwardServer (/home/pwa/node_modules/@magento/upward-js/lib/createUpwardServer.js:47:15)
    at Object.<anonymous> (/home/pwa/node_modules/@magento/upward-js/bin/server:5:40)
    at Module._compile (node:internal/modules/cjs/loader:1155:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1209:10)
    at Module.load (node:internal/modules/cjs/loader:1033:32)
    at Function.Module._load (node:internal/modules/cjs/loader:868:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:22:47

I have already provided the required environment variables in the .env file
UPWARD_JS_UPWARD_PATH=dist/upward.yml
UPWARD_JS_BIND_LOCAL=true

To reproduce

Steps to reproduce the behavior:

1. Create a sample pwa project
2. Setup upward-js variables in the .env file
3. Launch the upward-js server using the command npx upward-js-server
4. Error saying upwardPath is required will show up.

Expected behavior

I expect the upward js server to launch given that the env variables are provided.

Screenshots

If applicable, add screenshots to help explain your problem.

Possible solutions

I did try to debug the issue and check that .env variables set in the file are being read.
In the file /bin/server I added a console.log(config); and this was the output:

[Function: transformer] {
  fromEnv: [Function (anonymous)],
  toEnv: [Function (anonymous)]
}

And this is not the input createUpwardServer() expects in createUpwardServer.js
After manually editing the config object to be

const config = {
    upwardPath: process.env.UPWARD_JS_UPWARD_PATH || './upward.yml',
    bindLocal: process.env.UPWARD_JS_BIND_LOCAL === 'true',
    port: 8000),
    host:  '0.0.0.0',
    logUrl: true
};

Running npx upward-js-server worked!

Debug Report

yarn run v1.22.22
$ buildpack generate-build-report
  ℹ  Generating build report for [email protected]. This may take a moment.

  ℹ  Inspecting Dependencies
    Found 10 @magento dependencies in yarn.lock
    @magento/pwa-buildpack @ 11.4.3
    @magento/upward-js @ 5.3.2
    @adobe/apollo-link-mutation-queue @ 1.0.2
    @magento/babel-preset-peregrine @ 1.2.2
    @magento/eslint-config @ 1.5.3
    @magento/pagebuilder @ 8.2.1
    @magento/peregrine @ 13.2.1
    @magento/pwa-theme-venia @ 1.4.0
    @magento/upward-security-headers @ 1.0.11
    @magento/venia-ui @ 10.3.0

  ℹ  Inspecting Magento Backend
Browserslist: caniuse-lite is outdated. Please run:
  npx update-browserslist-db@latest
  Why you should do it regularly: https://github.com/browserslist/update-db#readme
Intercept custom JS done
Intercept custom CSS done
    Not using sample backend.
    Backend is UP!

  ℹ  Inspecting System
    OS: #78~20.04.1-Ubuntu SMP Wed Oct 9 22:05:22 UTC 2024
    Node Version: v16.18.1
    NPM Version: 8.19.2

Please complete the following device information:

• Device [e.g. iPhone6, PC, Mac, Pixel3]:
• Browser [e.g. Chrome, Safari]:
• Browser Version [e.g. 22]:
• Magento Version [e.g Adobe Commerce 2.4]:

Please let us know what packages this bug is in regards to:

• venia-concept
• venia-ui
• pwa-buildpack
• peregrine
• pwa-devdocs
• upward-js
• upward-spec
• create-pwa

[m2-assistant]

Hi @zeina99. Thank you for your report.
To speed up processing of this issue, make sure that you provided sufficient information.
Add a comment to assign the issue: @magento I am working on this

---

Join Magento Community Engineering Slack and ask your questions in #github channel.