Initialize SvelteKit project with Yarn

[alecandido]

Describe the bug
I was not able to initialize with yarn, i.e. the command yarn create svelte@next foo is failing.

To Reproduce

• yarn: 2.4.1
• node: v16.1.0

Then run yarn create svelte@next foo.

Expected behavior
Initialize the same way of npm init svelte@next foo

Stacktraces

yarn output

➤ YN0000: ┌ Resolution step
➤ YN0000: └ Completed in 1s 638ms
➤ YN0000: ┌ Fetch step
➤ YN0000: └ Completed
➤ YN0000: ┌ Link step
➤ YN0000: └ Completed
➤ YN0000: Done in 1s 699ms
(node:66799) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.

(Use node --trace-warnings ... to show where the warning was created)

/home/alessandro/.yarn/berry/cache/create-svelte-npm-2.0.0-next.71-3c988c4861-7.zip/node_modules/create-svelte/bin.js:2

import fs from 'fs';
^^^^^^

SyntaxError: Cannot use import statement outside a module

at Object.compileFunction (node:vm:355:18)

at wrapSafe (node:internal/modules/cjs/loader:1039:15)

at Module._compile (node:internal/modules/cjs/loader:1073:27)

at Object.Module.extensions..js (node:internal/modules/cjs/loader:1138:10)

at Module.load (node:internal/modules/cjs/loader:989:32)

at Function.external_module.Module._load (/tmp/xfs-14e6a52a/dlx-66788/.pnp.js:4968:14)

at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)

at node:internal/main/run_main_module:17:47

Severity
I have found a workaround and I can still use npm, so low.

Additional context
I found a workaround: searching on stackoverflow I found a related question and somewhere else (I don't remember where, most likely in yarn documentation) I get the second bit of the equation and the two things together made the command working:

1. add immediately a package.json

{
   "type": "module"
}

2. add the following line in .yarnrc.yml

nodeLinker: "node-modules"

I actually don't know how bad is what I'm doing, it looks to me that I'm able to revert the two tricks right after, and I hope the thing should not be incompatible overall. But I just know this way it's running, and doing what expected.

[benmccann]

We don't support Yarn and recommend against using it: https://kit.svelte.dev/faq#integrations

[alecandido]

Sorry to have opened another PR, keep searching I even found an older issue #993, unfortunately I just found workarounds before the disclaimer... (at least the former workaround fully works at the time of writing)

I will follow the advice and drop yarn for svelte.