Access error for cache in Node 15 Docker container

[Jwashton]

When running Snowpack inside a NodeJS 15 Docker container running on a Linux host, I get errors like these on page load:

[snowpack] Cache Error: Error: EACCES: permission denied, mkdir '/root/.cache/snowpack/build-cache-2.7/tmp'

Here is a repo with a minimal reproducible example. Snowpack is the only dependency, no other plugins needed. The only asset we're serving is a single HTML page. I've provided a script with the exact Docker flags I'm using.

I've noticed this error does not appear if any of the following are true:

1. If I switch back to a Node 14 image
2. If I use Podman instead of Docker
3. If I run this container on a MacOS host instead of a Linux host.

A coworker of mine first brought this to my attention. I don't know what flavor of Linux he's using as his Docker host (I think maybe Debian?), but I can reliably reproduce this issue with

• Fedora 33
• Docker 20.10.2
• Snowpack 3.0.13
• NodeJS 15.10.0

Is there anything else I can do or provide to shed some light on this issue?

P.S. Thank you for all the work you do on Snowpack. I've recently started using it, and have very much enjoyed the experience.

[nojaf]

I'm having the same problem, is there a way to change that .cache folder to another path?
My information:

• Ubuntu 20.04.2 LTS
• Docker version 19.03.15, build 99e3ed8919
• Snowpack 3.0.13
• NodeJS 15.11.0

[jonaspetersorensen]

I got the same problem for Node v16 in a docker container.

If I run snowpack dev (via npm script) then it will always result with the following error
[snowpack] EACCES: permission denied, unlink '/root/.cache/snowpack/8c069df52082beee3c95ca17836fb8e2/build/[email protected]'

If I use Node v14 (docker) then it works fine.