docker-compose binary generator

Dockerfile

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+# Dockerfile to build docker-compose for aarch64
+FROM arm64v8/python:3.6.5-stretch
+
+# Add env
+ENV LANG C.UTF-8
+
+# Enable cross-build for aarch64
+COPY ./vendor/qemu-bin /usr/bin/
+RUN [ "cross-build-start" ]
+
+# Set the versions
+ENV DOCKER_COMPOSE_VER 1.21.2
+# docker-compose requires pyinstaller 3.3.1 (check github.com/docker/compose/requirements-build.txt)
+# If this changes, you may need to modify the version of "six" below
+ENV PYINSTALLER_VER 3.3.1
+# "six" is needed for PyInstaller. v1.11.0 is the latest as of PyInstaller 3.3.1
+ENV SIX_VER 1.11.0
+
+# Install dependencies
+# RUN apt-get update && apt-get install -y
+RUN pip install six==$SIX_VER
+
+# Compile the pyinstaller "bootloader"
+# https://pyinstaller.readthedocs.io/en/stable/bootloader-building.html
+WORKDIR /build/pyinstallerbootloader
+RUN curl -fsSL https://github.com/pyinstaller/pyinstaller/releases/download/v$PYINSTALLER_VER/PyInstaller-$PYINSTALLER_VER.tar.gz | tar xvz >/dev/null \
+    && cd PyInstaller*/bootloader \
+    && python3 ./waf all
+
+# Clone docker-compose
+WORKDIR /build/dockercompose
+RUN git clone https://github.com/docker/compose.git . \
+    && git checkout $DOCKER_COMPOSE_VER
+
+# Run the build steps (taken from github.com/docker/compose/script/build/linux-entrypoint)
+RUN mkdir ./dist \
+    && pip install -q -r requirements.txt -r requirements-build.txt \
+    && ./script/build/write-git-sha \
+    && pyinstaller docker-compose.spec \
+    && mv dist/docker-compose ./docker-compose-$(uname -s)-$(uname -m)
+
+# Disable cross-build for aarch64
+# Note: don't disable this, since we want to run this container on x86_64, not aarch64
+# RUN [ "cross-build-end" ]
+
+# Copy out the generated binary
+VOLUME /dist
+CMD cp docker-compose-* /dist

README.md

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-# docker-compose-aarch64
-generate a docker-compose binary for aarch64 / arm64
+# docker-compose binaries for aarch64
+
+This repository contains helpers to build a docker-compose binary for aarch64/arm64. This project exists because, currently, docker-compose [releases](https://github.com/docker/compose/releases) do not include an aarch64 binary.
+
+## To build
+
+You may wish to edit the docker-compose version inside the Dockerfile. Then:
+
+```bash
+docker build . -t docker-compose-aarch64-builder
+docker run --rm -v "$(pwd)":/dist docker-compose-aarch64-builder
+# this will generate a `docker-compose-Linux-aarch64` in "$(pwd)"
+```
+

vendor/get-qemu-bin.sh

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+#!/bin/bash
+# Script to generate a qemu binary for an arm64 target
+set -euo pipefail
+
+# Set the target platform
+#TARGET="arm"
+TARGET="arm64"
+
+# Get the destination
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+DEST="$SCRIPT_DIR/qemu-bin/"
+
+# Empty out the destination
+rm -r "$DEST" || true
+
+# Clone the resin patcher
+cd "$(mktemp -d)"
+git clone --depth 1 https://github.com/resin-io-projects/armv7hf-debian-qemu.git
+cd armv7hf-debian-qemu
+
+# Clean out the stuff we're about to build, then copy over the rest
+rm bin/qemu-arm-static
+md5 bin/resin-xbuild
+rm bin/resin-xbuild
+cp -a bin/ "$DEST"
+
+# Build the binary and copy it over
+# TBH, I don't know why we need to rebuild this binary... After a lot of experimentation,
+# I found out that the binary shipped with the git repo (as of Apr 11 2018, Latest commit d4a214f on Jul 2, 2017)
+# doesn't work in an aarch64 host. ?????
+GOOS=linux GOARCH=amd64 ./build.sh
+cp resin-xbuild "$DEST"
+
+# Get qemu
+case "$TARGET" in
+    "arm64")
+        curl -L https://github.com/resin-io/qemu/releases/download/v2.9.0%2Bresin1/qemu-2.9.0.resin1-aarch64.tar.gz | tar xzf -
+        ;;
+    "arm")
+        curl -L https://github.com/resin-io/qemu/releases/download/v2.9.0%2Bresin1/qemu-2.9.0.resin1-arm.tar.gz | tar xzf -
+        ;;
+    *)
+        echo "Unknown target $TARGET"
+        exit 1
+        ;;
+esac
+
+# Copy qemu
+cp qemu*/* "$DEST"
+
+echo -e "\n\n"
+echo "================================"
+echo "Successfully built for $TARGET!"
+echo "================================"

vendor/qemu-bin/cross-build-end

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+resin-xbuild

vendor/qemu-bin/cross-build-start

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+resin-xbuild

vendor/qemu-bin/sh.real

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+sh