Add an Alpine Vagrant configuration

This closes #221

Rakefile

@@ -51,7 +51,14 @@ task :binary => :compile do
 end
 
 namespace :build do
-  ['x86_64-linux', 'x86-linux', 'armhf-linux', 'x86_64-freebsd-10', 'x86_64-freebsd-11'].each do |arch|
+  [
+    'x86_64-linux',
+    'x86-linux',
+    'armhf-linux',
+    'x86_64-freebsd-10',
+    'x86_64-freebsd-11',
+    'x86_64-linux-musl'
+  ].each do |arch|
     desc "build binary gem for #{arch}"
     task arch do
       arch_dir = Pathname(__FILE__).dirname.join("release/#{arch}")

release/x86_64-linux-musl/Dockerfile

@@ -0,0 +1,20 @@
+FROM alpine:3.5
+
+MAINTAINER Andrew Cutler <andrew@panubo.com>
+
+RUN apk update && \
+    apk add sudo bash git openssh rsync && \
+    mkdir -p ~root/.ssh /etc/authorized_keys && chmod 700 ~root/.ssh/ && \
+    sed -i -e 's@^AuthorizedKeysFile.*@@g' /etc/ssh/sshd_config  && \
+    echo -e "Port 22\n" >> /etc/ssh/sshd_config && \
+    echo -e "vagrant ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers && \
+    cp -a /etc/ssh /etc/ssh.cache && \
+    rm -rf /var/cache/apk/*
+
+EXPOSE 22
+
+COPY entry.sh /entry.sh
+
+ENTRYPOINT ["/entry.sh"]
+
+CMD ["/usr/sbin/sshd", "-D", "-f", "/etc/ssh/sshd_config"]

release/x86_64-linux-musl/Vagrantfile

@@ -0,0 +1,83 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure("2") do |config|
+  # ENV['VAGRANT_DEFAULT_PROVIDER'] = 'docker'
+
+  # The most common configuration options are documented and commented below.
+  # For a complete reference, please see the online documentation at
+  # https://docs.vagrantup.com.
+
+  # Every Vagrant development environment requires a box. You can search for
+  # boxes at https://atlas.hashicorp.com/search.
+  # config.vm.box = "base"
+
+  # Disable automatic box update checking. If you disable this, then
+  # boxes will only be checked for updates when the user runs
+  # `vagrant box outdated`. This is not recommended.
+  # config.vm.box_check_update = false
+
+  # Create a forwarded port mapping which allows access to a specific port
+  # within the machine from a port on the host machine. In the example below,
+  # accessing "localhost:8080" will access port 80 on the guest machine.
+  # config.vm.network "forwarded_port", guest: 80, host: 8080
+
+  # Create a private network, which allows host-only access to the machine
+  # using a specific IP.
+  # config.vm.network "private_network", ip: "192.168.33.10"
+
+  # Create a public network, which generally matched to bridged network.
+  # Bridged networks make the machine appear as another physical device on
+  # your network.
+  # config.vm.network "public_network"
+
+  # Share an additional folder to the guest VM. The first argument is
+  # the path on the host to the actual folder. The second argument is
+  # the path on the guest to mount the folder. And the optional third
+  # argument is a set of non-required options.
+  # config.vm.synced_folder "../data", "/vagrant_data"
+  config.vm.synced_folder "../..", "/libv8"
+
+  # Provider-specific configuration so you can fine-tune various
+  # backing providers for Vagrant. These expose provider-specific options.
+  # Example for VirtualBox:
+  #
+  # config.vm.provider "virtualbox" do |vb|
+  #   # Display the VirtualBox GUI when booting the machine
+  #   vb.gui = true
+  #
+  #   # Customize the amount of memory on the VM:
+  #   vb.memory = "1024"
+  # end
+  #
+  # View the documentation for the provider you are using for more
+  # information on available options.
+
+  config.vm.provider "docker" do |d|
+    d.build_dir = "."
+    d.has_ssh = true
+  end
+
+  # Define a Vagrant Push strategy for pushing to Atlas. Other push strategies
+  # such as FTP and Heroku are also available. See the documentation at
+  # https://docs.vagrantup.com/v2/push/atlas.html for more information.
+  # config.push.define "atlas" do |push|
+  #   push.app = "YOUR_ATLAS_USERNAME/YOUR_APPLICATION_NAME"
+  # end
+
+  # Enable provisioning with a shell script. Additional provisioners such as
+  # Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
+  # documentation for more information about their specific syntax and use.
+  # config.vm.provision "shell", inline: <<-SHELL
+  #   apt-get update
+  #   apt-get install -y apache2
+  # SHELL
+
+  config.vm.provision "shell", inline: <<-SHELL
+    apk add --update alpine-sdk binutils-gold linux-headers ruby ruby-dev ruby-bundler python
+  SHELL
+end

release/x86_64-linux-musl/entry.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+set -e
+
+[ "$DEBUG" == 'true' ] && set -x
+
+DAEMON=sshd
+
+# Copy default config from cache
+if [ ! "$(ls -A /etc/ssh)" ]; then
+   cp -a /etc/ssh.cache/* /etc/ssh/
+fi
+
+# Generate Host keys, if required
+if ! ls /etc/ssh/ssh_host_* 1> /dev/null 2>&1; then
+    ssh-keygen -A
+fi
+
+# Fix permissions, if writable
+if [ -w ~/.ssh ]; then
+    chown root:root ~/.ssh && chmod 700 ~/.ssh/
+fi
+if [ -w ~/.ssh/authorized_keys ]; then
+    chown root:root ~/.ssh/authorized_keys
+    chmod 600 ~/.ssh/authorized_keys
+fi
+if [ -w /etc/authorized_keys ]; then
+    chown root:root /etc/authorized_keys
+    chmod 755 /etc/authorized_keys
+    find /etc/authorized_keys/ -type f -exec chmod 644 {} \;
+fi
+
+# Create vagrant user if missing
+if ! ls /home/vagrant 1> /dev/null 2>&1; then
+        addgroup vagrant
+        adduser -D -G vagrant -s '/bin/bash' vagrant
+        (echo vagrant; echo vagrant) | passwd vagrant
+        mkdir /home/vagrant/.ssh
+        echo 'ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== vagrant insecure public key' > /home/vagrant/.ssh/authorized_keys
+        chmod -R 0700 /home/vagrant/.ssh
+        chown -R vagrant:vagrant /home/vagrant/.ssh
+fi
+
+# Update MOTD
+if [ -v MOTD ]; then
+    echo -e "$MOTD" > /etc/motd
+fi
+
+stop() {
+    echo "Received SIGINT or SIGTERM. Shutting down $DAEMON"
+    # Get PID
+    pid=$(cat /var/run/$DAEMON/$DAEMON.pid)
+    # Set TERM
+    kill -SIGTERM "${pid}"
+    # Wait for exit
+    wait "${pid}"
+    # All done.
+    echo "Done."
+}
+
+echo "Running $@"
+if [ "$(basename $1)" == "$DAEMON" ]; then
+    trap stop SIGINT SIGTERM
+    $@ &
+    pid="$!"
+    mkdir -p /var/run/$DAEMON && echo "${pid}" > /var/run/$DAEMON/$DAEMON.pid
+    wait "${pid}" && exit $?
+else
+    exec "$@"
+fi