I need some help in getting my first open source project running - node.js

Question

I needed some help in getting my first open source project that I want to work on to run on my machine. I have a 2018 MacBook Pro 15” running Big Sur 11.1 (20C69). I am using VS Code as my IDE. I have forked and cloned the repository for my project.
I have followed the instructions on how to get the app to run here:
https://github.com/bancodobrasil/stop-analyzing-embed
Here are the instructions on how to contribute:
https://github.com/bancodobrasil/stop-analyzing-embed/blob/master/CONTRIBUTING.md
This is the issue I have been assigned, and I am going to work on:
https://github.com/bancodobrasil/stop-analyzing-embed/issues/72
I have first run “npm install” and then “npm run dev”.
Here are the errors I get in terminal:
The default interactive shell is now zsh.
To update your account to use zsh, please run chsh -s /bin/zsh.
For more details, please visit https://support.apple.com/kb/HT208050.
ShoaibKhansMBP:stop-analyzing-embed shoaibkhan$ cd app
ShoaibKhansMBP:app shoaibkhan$ npm install
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: stop-analyzing-embed#0.2.0
npm ERR! Found: react#16.13.1
npm ERR! node_modules/react
npm ERR! react#"^16.13.1" from the root project
npm ERR! peer react#">=16.9.0" from #testing-library/react-hooks#3.3.0
npm ERR! node_modules/#testing-library/react-hooks
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer react#"17.0.1" from react-test-renderer#17.0.1
npm ERR! node_modules/react-test-renderer
npm ERR! peer react-test-renderer#">=16.9.0" from #testing-library/react-hooks#3.3.0
npm ERR! node_modules/#testing-library/react-hooks
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See /Users/shoaibkhan/.npm/eresolve-report.txt for a full report.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/shoaibkhan/.npm/_logs/2021-01-26T14_56_13_324Z-debug.log
ShoaibKhansMBP:app shoaibkhan$ npm run dev
stop-analyzing-embed#0.2.0 dev
REACT_APP_BACKEND_URL=http://localhost:8008 yarn start
sh: yarn: command not found
npm ERR! code 127
npm ERR! path /Users/shoaibkhan/Documents/Treehouse/Open Source Projects/stop-analyzing-embed/app
npm ERR! command failed
npm ERR! command sh -c REACT_APP_BACKEND_URL=http://localhost:8008 yarn start
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/shoaibkhan/.npm/_logs/2021-01-26T14_56_33_589Z-debug.log
ShoaibKhansMBP:app shoaibkhan$
Can someone please help me to get this running.
Thanks,
Shoaib Kamal Khan

Answer 1

The error message tells us that yarn is not installed. Looking at the dev script inside the package.json we can see the actual command that is run:
"dev": "REACT_APP_BACKEND_URL=http://localhost:8008 yarn start",
The problem is that it's not listed as a (dev-) dependency in the package.json (you might want to create a PR for that), hence you don't get it installed when doing npm i .
To fix this and install yarn, you should run the following:
npm i -D yarn or install it globally using npm i -g yarn.