Add GitHub Actions CI rules (#70)

* Prepare Dockerfile for GitHub Actions

* Add Action

* Add CI rules

* Move docker files into the docker directory to prevent fetching build artifacts

* Cache Docker layers

Co-authored-by: aanper <mail@s3f.ru>

docker/Dockerfile

@@ -0,0 +1,26 @@
+FROM ubuntu:18.04
+
+RUN apt-get update && \
+    apt install -y --no-install-recommends \
+        make \
+        gcc-arm-none-eabi \
+        binutils-arm-none-eabi \
+        libnewlib-arm-none-eabi \
+        autoconf \
+        automake \
+        libtool \
+        curl \
+        wget \
+        g++ \
+        unzip \
+        build-essential \
+        python \
+        python-pip \
+        libstdc++-arm-none-eabi-newlib \
+        libclang-10-dev && \
+    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --profile=minimal --target thumbv7em-none-eabi thumbv7em-none-eabihf
+
+COPY entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

docker/entrypoint.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# A hack for GitHub Actions to not install Rust twice
+if [ "$HOME" != "/root" ]; then
+    ln -sf /root/.rustup "$HOME/.rustup"
+    ln -sf /root/.cargo "$HOME/.cargo"
+fi
+
+PATH="$HOME/.cargo/bin:${PATH}"
+
+if [ -z "$1" ]; then
+    bash
+else
+    echo "Running $1"
+    set -ex
+    bash -c "$1"
+fi