Docker updates for v3.8

[andrew-danieli-fj]

Hi,

Even though I use the standalone version on a daily basis, I sometimes experiment with pandoc using the docker images available on Docker Hub. I was wondering when v3.8 will be available as a prebuilt Docker image, and if there were plans to make the nightly build version available as a Docker Image, for testing bug fixes.

[tarleb]

The static and alpine Docker images have already been updated earlier this week and can be pulled from Docker Hub and from the GitHub Container Registry. However, images for Ubuntu are still work in progress. See pandoc/dockerfiles#300.

About nightly builds: pandoc is recognized by Docker as an official Open Source Organization, which gives us access to useful tools, including the Docker Build Cloud. That allows us to build pandoc images for both, amd64 and arm64. However, our build-times are limited to 400 minutes per month. Building all images for a release consumes around 90-100 minutes. So we can do no more than 4 full releases each month. Everything above fortnightly builds is therefore out of the question.

We could setup weekly or even nightly builds using just GitHub Actions, but this would limit us to amd64 images. Factoring in that each such build consumes resources and thus leaves an environmental footprint, I opted to refrained from doing that. The benefit doesn't seem to justify the costs and the effort to set it up.

[cagix]

That allows us to build pandoc images for both, amd64 and arm64.

it seems, just the ubuntu images are available in amd64 and arm64, alpine is only available as amd64 image on docker hub. so folks working on a raspberry pi or mac would need the ubuntu image.

is there a chance to build the alpine image for arm64 as well?

[tarleb]

Only the addon images that bundle LaTeX are amd64-only. The pandoc/minimal, /core, and typst images should have arm64 support. That's because TeXLive doesn't ship the binaries necessary for arm64.

[cagix]

Only the addon images that bundle LaTeX are amd64-only. The pandoc/minimal, /core, and typst images should have arm64 support. That's because TeXLive doesn't ship the binaries necessary for arm64.

but pandoc/extra-ubuntu with texlive is available in arm64?

[tarleb]

Right, I should have been more specific: TeXLive doesn't offer musl-libc arm64 binaries.