Fix cryptography wheels (#5)

Installs Rust
Adds hack to Docker FS so armv6/v7 builds complete successfully.

.github/workflows/docker-build.yaml

@@ -16,22 +16,27 @@ jobs:
             arch_friendly: i386
             hass_arch: i386
             s6_arch: x86
+            rust_arch: i686-unknown-linux-gnu
           - arch: linux/amd64
             arch_friendly: amd64
             hass_arch: amd64
             s6_arch: amd64
+            rust_arch: x86_64-unknown-linux-gnu
           - arch: linux/arm/v6
             arch_friendly: armv6
             hass_arch: armv6
             s6_arch: arm
+            rust_arch: arm-unknown-linux-gnueabi
           - arch: linux/arm/v7
             arch_friendly: armv7
             hass_arch: armv7
             s6_arch: armhf
+            rust_arch: armv7-unknown-linux-gnueabihf
           - arch: linux/arm64
             arch_friendly: arm64
             hass_arch: aarch64
             s6_arch: aarch64
+            rust_arch: aarch64-unknown-linux-gnu
 
     steps:
       - name: Checkout
@@ -45,11 +50,28 @@ jobs:
         with:
           install: true
 
+      # https://github.com/crazy-max/ghaction-docker-buildx/issues/172
+      - name: Hack Docker FS to Build cryptography on armv6/armv7
+        run: |
+          df -h
+          sudo swapon --show
+          sudo dd if=/dev/zero of=/swapfile1 bs=1M count=6K 
+          sudo chmod 600 /swapfile1
+          sudo mkswap /swapfile1
+          sudo swapon /swapfile1
+          sudo swapon --show
+          sudo free -h
+          sudo systemctl stop docker
+          sudo mount -t tmpfs -o size=9G tmpfs /var/lib/docker
+          df -h
+          sudo systemctl start docker
+
       - name: Build
         run: |
           docker build \
             --build-arg HASS_ARCH=${{ matrix.hass_arch }} \
             --build-arg S6_ARCH=${{ matrix.s6_arch }} \
+            --build-arg RUST_ARCH=${{ matrix.rust_arch }} \
             --tag baseimage:ci \
             --platform ${{ matrix.arch }} \
             --progress plain \

Dockerfile

@@ -1,15 +1,18 @@
 # syntax=docker/dockerfile:experimental
 ARG HASS_ARCH=amd64
 ARG S6_ARCH=amd64
+ARG RUST_ARCH=x86_64-unknown-linux-gnu
 
 #####################################################################
 #                                                                   #
 # Build Wheels                                                      #
 #                                                                   #
 #####################################################################
 FROM python:3.8-slim as wheels-builder
+ARG RUST_ARCH
 
 ENV PIP_EXTRA_INDEX_URL=https://www.piwheels.org/simple
+ENV PATH="${PATH}:/root/.cargo/bin"
 
 # Install buildtime packages
 RUN apt-get update \
@@ -22,6 +25,10 @@ RUN apt-get update \
         libffi-dev \
         libssl-dev
 
+RUN curl -o rustup-init https://static.rust-lang.org/rustup/dist/${RUST_ARCH}/rustup-init \
+    && chmod +x rustup-init \
+    && ./rustup-init -y --no-modify-path --profile minimal --default-host ${RUST_ARCH}
+
 WORKDIR /wheels
 RUN git clone https://github.com/hass-emulated-hue/core.git /app \
     && cp /app/requirements.txt requirements.txt