if I don’t want to build a --static image, what should I copy to a Docker image in order for the binary to work?

I’ve already found something out. It can be done by using alpine + https://github.com/sgerrand/alpine-pkg-glibc

@gklijs @rahul080327 this seems to work (based on Alpine, I don’t know anything about LLVM vs MUSL)

Borkdude@michiel ~/Dropbox/dev/clojure/clj-kondo (master*) $ clj-kondo --lint src
...
linting took 305ms, errors: 0, warnings: 3
Borkdude@michiel ~/Dropbox/dev/clojure/clj-kondo (master*) $ docker run -v $PWD/src:/src borkdude/clj-kondo clj-kondo --lint /src
...
linting took 372ms, errors: 0, warnings: 4

Docker is only slightly slower

This is my Docker image: https://github.com/borkdude/clj-kondo/blob/master/Dockerfile

How large is the image?

30MB

I pushed it here: https://cloud.docker.com/repository/registry-1.docker.io/borkdude/clj-kondo

youre already compiling it here https://github.com/borkdude/clj-kondo/blob/master/Dockerfile#L19 right?

yes, using ubuntu as the base there

okay so the alpine is just to reduce the size

but since I’m not compiling it to a static binary, it needs those libc libraries at the bottom still

yeah

(the reason I’m not compiling to static is that it doesn’t work on Mac and I’d like to keep the script the same - although I could change that)

i guess this is the only solution then. maybe having a static build against musl might reduce it a bit more but i dont anticipate much

the aim here is only to reduce the image size?

linting my whole project takes the same amount of time in Docker as on Mac natively, so I think it’s good now

the last step (from Alpine) is indeed to reduce to size

yeah i dont think there is any other option.

30MB is fine with me, as long as it’s not 200MB or bigger 😉

yep 🙏:skin-tone-3:

im just a bit wary of some perf surprises alpine had for me. but they were long running stuff and hit the GC mostly. this should be okay

that scarred me into using plain debian images 😛

debian slim?

yeah

how big would those images be?

compared to Alpine

maybe some tens of MB

but you wont have stuff like GCC

installing that is a time/space waste again

I’ll keep it in the back of my mind if I run into problems with this

yeah mostly should be fine. i assume clj kondo doesnt allocate multi gigabyte heaps 😛

I hope not 😉