Unexpected identifier

[webian]

Hi, I'm new to postcss and I have a problem with a grunt.js that, using postcss+autoprefixer should prefix css but it doesn't.

Trying to find out the cause I ended to simply run:
npm i -D postcss postcss-cli
and then:
npx postcss
and it returns only:
Unexpected identifier

Please, what could I do to better debug this issue?

[webian]

More info:
postcss@8.3.8
postcss-cli@9.0.0

uname -a
Linux Acer 5.4.72-microsoft-standard-WSL2 #1 SMP Wed Oct 28 23:40:43 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

npm -v
6.14.4

[RyanZim]

Only Unexpected identifier; no stack trace or anything?

[webian]

Yes, only that.

[gerardcanal]

I am getting the same error on a scheduled CI run:

/usr/lib/node_modules/postcss-cli/index.js:3
import fs from 'fs-extra'
       ^^

SyntaxError: Unexpected identifier
    at Module._compile (internal/modules/cjs/loader.js:723:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)
Error: Process completed with exit code 1.

It was running well last week so I understand this was introduced recently (#401 apparently). I am not sure if I'm missing dependencies, I tried to install the ESM package with no luck (but I don't have much experience with node).

[RyanZim]

What Node version are you running (both of you)?

[gerardcanal]

That was a good point, I was running node 10 and just realised the logs had a deprecation warning, I completely missed that one! It is fixed now (currently on version 14).

[webian]

Thank you @gerardcanal for the idea. I was running node 10 (default for Ubuntu 20.04) and I updated it to 14 using NodeSource PPA and the problem is solved.

[RyanZim]

Yep, postcss-cli v9 requires Node 12 or higher, otherwise, you will get this error.