Create a repo swift-docker-base for swift track

Exercism Building Exercism
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As I knew, one of the problems with the current swift-test-runner is its large docker image size (~1 GB). There have been some attempts to address this issue.

As a proof of concept, I tried to reduce the size and achieved about a 40% reduction to 630 MB by removing libs and binaries that don’t seem necessary for Exercism’s needs.

The idea is simple: take the original swift Dockerfile and edit it to keep number of docker layers small as possible.

    && tar -xzf swift.tar.gz --directory / --strip-components=1 \
    && rm \
        /usr/lib/liblldb.so* \
        /usr/lib/libsourcekitdInProc.so \
        /usr/lib/libswiftDemangle.so \
        /usr/lib/libSwiftSourceKitClientPlugin.so \
        /usr/lib/libSwiftSourceKitPlugin.so \
        /usr/bin/docc \
        /usr/bin/lld \
        /usr/bin/lldb \
        /usr/bin/lldb-argdumper \
        /usr/bin/lldb-dap \
        /usr/bin/lldb-server \
        /usr/bin/sourcekit-lsp \
        /usr/bin/swift-format \
        /usr/bin/swift-plugin-server \
        /usr/bin/wasmkit \
    && rm -r \
        /usr/lib/swift_static \
        /usr/lib/swift/embedded \

Removing all of this still allowed me to build and test a single package, although I haven’t tested it across the full spectrum of exercises.

Could this be considered a significant improvement? Who would be interested in helping to create a repository for it like nim-docker-base?

2 Likes
2

@Meatball I’m really sorry to bother you again, but I honestly don’t know who else I could ask for advice.

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Sorry been quite busy, so havn’t had the time to look at the forum (so pinging me is often a good solution). But yes I think this could be relevant to have a docker-image-base. @iHiD, could you take a look at this.

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@ErikSchierboom may also be able to help

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GitHub - exercism/swift-docker-base has been created. The Swift team has write permissions

3 Likes
6

Thanks a lot, will create a PR in a couple of days with suggested changes.

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PR is created. Final size is ~413 MB

2 Likes
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@ErikSchierboom, Could you please add the required secret keys and bots to the GitHub repository when you have a moment?

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Done! Secrets added.

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Thank you! Could you please also rerun failed deploy and sync labels CI jobs? They should be available to be triggered from web interface.

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The sync labels script fails due to:

unable to load manifest: open .github/labels.yml: no such file or directory

I think the best way to fix this is to copy this file from another repo.

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I’ve fixed the deploy workflow.

1 Like
13

This two PR’s need attention:

Please review and merge.