If yarn is not installed, npm create @metamask/snap my-first-snap causes Error: Init Error: Failed to install dependencies.

[vorburger]

For ChainSafe/filsnap#258 :

https://docs.metamask.io/snaps/get-started/quickstart/

as well as https://docs.metamask.io/snaps/get-started/install-snaps/

mention npm or yarn. I'm in a noob in this space, and initially had only NPM but not Yarn installed on my system,

and when I first did as the documentation instructs one to, it didn't work:

$ npm create @metamask/snap my-first-snap
Need to install the following packages:
  @metamask/create-snap@0.34.0-flask.1
Ok to proceed? (y) y
npm WARN deprecated querystring@0.2.0: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated webextension-polyfill-ts@0.25.0: This project has moved to @types/webextension-polyfill
npm WARN deprecated webextension-polyfill-ts@0.22.0: This project has moved to @types/webextension-polyfill
Preparing /home/vorburger/git/github.com/vorburger/LearningMetaMaskSnap/my-first-snap...
Cloning template...
Installing dependencies...
/bin/sh: line 1: yarn: command not found
/home/vorburger/.npm/_npx/93b2e831f912ce78/node_modules/@metamask/create-snap/dist/cmds/init/initUtils.js:118
        throw new Error('Init Error: Failed to install dependencies.');
              ^

Error: Init Error: Failed to install dependencies.
    at yarnInstall (/home/vorburger/.npm/_npx/93b2e831f912ce78/node_modules/@metamask/create-snap/dist/cmds/init/initUtils.js:118:15)
    at initHandler (/home/vorburger/.npm/_npx/93b2e831f912ce78/node_modules/@metamask/create-snap/dist/cmds/init/initHandler.js:50:33)
    at async Object.init [as handler] (/home/vorburger/.npm/_npx/93b2e831f912ce78/node_modules/@metamask/create-snap/dist/cmds/init/index.js:27:5)

Node.js v18.16.0
npm ERR! code 1
npm ERR! path /home/vorburger/git/github.com/vorburger/LearningMetaMaskSnap
npm ERR! command failed
npm ERR! command sh -c create-snap my-first-snap

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/vorburger/.npm/_logs/2023-06-04T21_43_23_531Z-debug-0.log

I'm new to this space, but ... if one needs Yarn anyway, and it doesn't "just work" having only NPM, then...

... what's the point documenting both? Wouldn't it be simpler and less confusing to only mention Yarn directly?

[martinrhan]

I installed yarn the same error is still occuring