install sccache in the image

[cbeck88]

Hi, would you take a patch to install sccache in the image? It's pretty useful for making builds faster

cargo install sccache builds sccache from source, which is simple, but it's slower and idk if that is bad for you. We could also download pre-built packages, up to your preference

# Define the sccache version
ARG SCCACHE_VERSION=0.3.0

ENV SCCACHE_URL="https://github.com/mozilla/sccache/releases/download/v${SCCACHE_VERSION}/sccache-v${SCCACHE_VERSION}-x86_64-unknown-linux-musl.tar.gz"
#SCCACHE_URL="https://github.com/mozilla/sccache/releases/download/v${SCCACHE_VERSION}/sccache-v${SCCACHE_VERSION}-aarch64-unknown-linux-musl.tar.gz"

# Install prebuilt sccache based on platform
RUN wget -O sccache.tar.gz $SCCACHE_URL && \
    tar -xzf sccache.tar.gz && \
    mv sccache-v${SCCACHE_VERSION}-*-unknown-linux-musl/sccache /usr/local/bin/ && \
    chmod +x /usr/local/bin/sccache && \
    rm -rf sccache.tar.gz sccache-v${SCCACHE_VERSION}-*-unknown-linux-musl

[clux]

Hey, thanks for this. I think sccache is probably one of those tools that make a lot of sense in this image.

The tradeoff here would mostly be compile times (which are already taking an hour on GHA due to arm)), so my gut feel here is that installing via curl by grabbing the right tarball in each image build from the releases, would probably be the best thing to try. If you're able to try that out, I'd take a patch!

[cbeck88]

this is passing tests for me locally, lmk if it looks okay. thanks

[clux]

Thanks a lot! This looks sensible to me. Happy to include it as is, but two questions in case they are not oversights:

• we are both downloading the binary and cargo installing it? is that intended?
• we seem to be pinning 0.3.0, but see we have 0.8.0 in https://github.com/mozilla/sccache/releases

[cbeck88]

Sorry, that’s a mistake, will fix

[clux]

Thank you. Happy to send this out as is for now.
If you have some usage you could link in the future in this issue or in the README then this would be appreciated!