It would be nice if you could list supported versions of Swift someplace. I was able to glean that the 4.2.x that you support is 4.2.3 by going here but it was non-obvious.

I just wasn't up on what point release Swift 4.2 was at, is all.

This adds support for build and run image variants. It also deprecates images that do not include build or run in the tag (more on this below).

For example:

• Adds wlisac/raspberrypi3-swift:5.0.1-build
• Adds wlisac/raspberrypi3-swift:5.0.1-run
• Deprecates: wlisac/raspberrypi3-swift:5.0.1

The build variant includes the Swift compiler, Swift Package Manager, and other tools needed to build and run a Swift app from source.

The run variant is much lighter-weight, does not include the Swift compiler, and is designed to run an already built Swift app.

The build and run image variants can be used together in a multi-stage Dockerfile to produce a smaller image that's ready for deployment.

For example, from the balena-swift-hello-world sample project:

# Dockerfile for Raspberry Pi 3

# The build container for building the Swift app from source
FROM wlisac/raspberrypi3-swift:5.0.1-build AS build

WORKDIR /app

COPY . ./

RUN swift build --jobs 1

# The run container that will go to devices
FROM wlisac/raspberrypi3-swift:5.0.1-run

WORKDIR /app

COPY --from=build /app/.build/debug/Hello .

CMD ["./Hello"]

Using a multi-stage build with the build and run image variants can significantly reduce the size of the final deployment image. On average, the build images are ~1.3GB and the run images are ~250MB.

This change is inspired by the recent work on the swift-docker repo to add official slim Swift images: https://github.com/apple/swift-docker/pull/140

This also gets this project closer aligned with official balena base images that include build and run variants: https://www.balena.io/docs/reference/base-images/base-images/#run-vs-build

The previous images in this repo without build or run in the tag are deprecated as part of a longer term plan to closer align with balena's official base images. The images without build or run in the tag were more like build images, but balena's images default to run images when build or run is not specified.

This adds Swift 5.5.1 Dockerfiles for aarch64 devices 🎉

• aarch64 images use the Swift 5.5.1 release from futurejones/swift-arm64

Note: armv6 and armv7 builds are not yet available from uraimo/buildSwiftOnARM. Images for armv6 and armv7 will remain on Swift 5.1 for now.

This adds Swift 5.1 Dockerfiles for armv6, armv7, and aarch64 devices.

• armv6 and armv7 images use the Swift 5.1 release from uraimo/buildSwiftOnARM
• aarch64 images use the Swift 5.1 release from futurejones/swift-arm64

This updates the aarch64 Swift 5.0.1 images to use a patched Swift binary that was released today by @futurejones: https://github.com/futurejones/swift-arm64/releases/tag/v5.0.1-RELEASE

This "patched" version includes the -j / --jobs build option to limit the number of threads used by the Swift Package Manager. See more details about this option at https://github.com/apple/swift-package-manager/pull/2127.

Using this option is recommended when building on Raspberry Pi hardware:

swift build --jobs 1

The armv7 and armv6 based images for Swift 5.0.1 already included this patch: https://github.com/uraimo/buildSwiftOnARM/releases/tag/5.0.1

This fixes a mistake where only architecture-based build image variants were starting from balena's build image variant. The device-based images were starting from the default run variant. Now all build variants correctly start from the balena build variant.

This also unifies how the base image is specified for both run and build variants and updates the CLI automation to handle these changes.

Uses aarch64 5.0.1 release from futurejones: https://github.com/futurejones/swift-arm64/releases/tag/v5.0.1-RELEASE

32 bit 5.0.1 binaries are not currently available from uraimo, so keeping 5.0 as the latest release on the readme to avoid an inconsistency between 32/64 bit.

Images pushed to Docker Hub

Device default images: wlisac/generic-aarch64-swift:5.0.1 wlisac/raspberrypi3-64-swift:5.0.1

Device images with OS variants: wlisac/generic-aarch64-ubuntu-swift:5.0.1-bionic wlisac/generic-aarch64-ubuntu-swift:5.0.1-xenial

wlisac/raspberrypi3-64-ubuntu-swift:5.0.1-bionic wlisac/raspberrypi3-64-ubuntu-swift:5.0.1-xenial

Architecture base images: wlisac/aarch64-ubuntu-swift:5.0.1-bionic wlisac/aarch64-ubuntu-swift:5.0.1-xenial

I don't know how hard would it be to provide 5.2 images, and definitely I wouldn't expect 5.3 nightlies to be uploaded regularly, but at least it would make sense to maintain a Dockerfile for 5.3 if possible, similarly to what upstream does here.