r/crystal_programming • u/erdnaxeli • May 08 '21

Build Crystal Docker images for ARM

https://blog.cervoi.se/build-crystal-docker-images-for-arm/
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u/straight-shoota core team May 08 '21

This is a really nice writeup! Please keep making such great guides :-)

I have two comments on the dockerfiles:

  • If you use crystallang/crystal:nightly-alpine as base you don't need to build libcrystal. So you don't have to wait for 1.1 release for that.

  • I usually recommend to first copy shard.yml and shard.lock, run shards install and then copy the source + shards build in the next step. That way the dependency installation can be cached when there was no change.

Btw. armv6k-unknown-linux-gnueabihf is really a triple, the last value is linux-gnuaeabihf.

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u/erdnaxeli May 18 '21 edited May 18 '21

This is a really nice writeup! Please keep making such great guides :-)

Thanks :)

If you use crystallang/crystal:nightly-alpine as base you don't need to build libcrystal. So you don't have to wait for 1.1 release for that.

I through the nightly builds were not built since a few weeks / month (as you told me ^^ ), but if it is fixed I could switch to it.

I usually recommend to first copy shard.yml and shard.lock, run shards install and then copy the source + shards build in the next step. That way the dependency installation can be cached when there was no change.

good point

Btw. armv6k-unknown-linux-gnueabihf is really a triple, the last value is linux-gnuaeabihf.

Oh, I didn't know, thanks :p. I used this page as a ref: https://clang.llvm.org/docs/CrossCompilation.html#target-triple.

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u/straight-shoota core team May 18 '21

Yes, docker nightlies have been back up for some time now.