Build within Dockerfile

[lcmgh]

Hi!

Could I utilize Cachepot to build within a Dockerfile with help of a buildx mounted directory?

Or should I rather rely on something like https://github.com/LukeMathWalker/cargo-chef?

Thanks for your input

[drahnr]

I think this needs some more detail on the exact use case to spell out a recommendation on your specific use case.

[lcmgh]

Usecase: Improve build time of Docker based Rust builds.

So what I understand:

cargo chef:

• caches compiled dependencies
• need to rebuild all dependencies if a single dependency changes
• Caching is limited to Docker builds and scoped to a single project

cachepot

• Caches single compiled binaries
• Caching can be utilised across several projects
• Assumption: Works also within Docker builds by using a mount buildx flag: RUN --mount=type=cache,target=$CACHEPOT_DIR cargo build

I have not verified the latter due to general buildx problems in my environment. I expect that I could enhance build time by utilising both tools.

[drahnr]

So you want to run cachepot from within your docker container by mounting both the cache dir of cachepot and the cachepot binary itself? If so, yes, that would work.

[lcmgh]

Cool. I would install the cachepot binary within the Dockerfile and then use the cache dir of cachepot as buildx mounted directory.