It's not possible to install not sidecar plugin via devfile v2

[svor]

Describe the bug

If extensions.json file contains plugins which are not sidecar for example dbaeumer.vscode-eslint, they won't be installed in the workspace.

Che version

7.38@latest

Steps to reproduce

Try to start the forkspace form this sample https://github.com/svor/web-nodejs-sample/tree/noplugins.
The content of extensions.json is

{
    // See https://go.microsoft.com/fwlink/?LinkId=827846
    // for the documentation about the extensions.json format
    "recommendations": [
        "dbaeumer.vscode-eslint"
    ]
}

Expected behavior

The plugins should be installed

Runtime

OpenShift

Screenshots

No response

Installation method

chectl/next

Environment

Linux

Eclipse Che Logs

No response

Additional context

No response

[benoitf]

from what I see,

1. download script is not analyzing the theia component now as this one is inside a plug-in
2. it fails on empty array of attribute vscode-extensions so it tries to curl tons of dummy files

[l0rd]

@svor this looks critical to me. I have set severity/P1.

[benoitf]

fixed