Initial commit with basic functionality

README.md

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+# Crystal
+
+This is a Crystal engine used to launch Crystal apps on [Nanobox](http://nanobox.io). It installs all binaries to run a Crystal app.
+
+# Usage
+To use the Crystal engine, specify `crystal` as your engine in your [boxfile.yml](http://docs.nanobox.io/app-config/boxfile/).
+
+```yaml
+run.config:
+  engine: crystal
+```
+
+## Crystal on Nanobox
+For more information about using Crystal on Nanobox, view the [Crystal guides](http://guides.nanobox.io/crystal/).
+
+## Help & Support
+This is an engine provided by [Nanobox](http://nanobox.io). If you are running into an issue with the engine, feel free to [create a new issue on this project](https://github.com/nanobox-io/nanobox-engine-crystal/issues/new).

Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.configure(2) do |config|
+  config.vm.box     = "ubuntu/trusty64"
+
+  config.vm.provider "virtualbox" do |v|
+    v.customize ["modifyvm", :id, "--memory", "2048", "--ioapic", "on"]
+  end
+
+  config.vm.synced_folder ".", "/vagrant"
+
+  # install docker
+  config.vm.provision "shell", inline: <<-SCRIPT
+    if [[ ! `which docker > /dev/null 2>&1` ]]; then
+      # add docker's gpg key
+      apt-key adv \
+        --keyserver hkp://p80.pool.sks-keyservers.net:80 \
+        --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
+
+      # add the source to our apt sources
+      echo \
+        "deb https://apt.dockerproject.org/repo ubuntu-trusty main \n" \
+          > /etc/apt/sources.list.d/docker.list
+
+      # update the package index
+      apt-get -y update
+
+      # ensure the old repo is purged
+      apt-get -y purge lxc-docker
+
+      # install docker
+      apt-get -y install docker-engine
+    fi
+  SCRIPT
+
+  # start docker
+  config.vm.provision "shell", inline: <<-SCRIPT
+    if [[ ! `service docker status | grep "start/running"` ]]; then
+      # start the docker daemon
+      service docker start
+    fi
+  SCRIPT
+
+  # wait for docker to be running
+  config.vm.provision "shell", inline: <<-SCRIPT
+    echo "Waiting for docker sock file"
+    while [ ! -S /var/run/docker.sock ]; do
+      sleep 1
+    done
+  SCRIPT
+
+  # pull the build image to run tests in
+  config.vm.provision "shell", inline: <<-SCRIPT
+    echo "Pulling the build image"
+    docker pull nanobox/build
+  SCRIPT
+end

bin/boxfile

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+#!/bin/bash
+# -*- mode: bash; tab-width: 2; -*-
+# vim: ts=2 sw=2 ft=bash noet
+
+set -e
+
+cat <<-END
+run.config:
+  cache_dirs:
+    - lib
+    - .shards
+  build_triggers:
+    - shards.yml
+    - shards.lock
+END
+
+exit 0

bin/build

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+#!/bin/bash
+# -*- mode: bash; tab-width: 2; -*-
+# vim: ts=2 sw=2 ft=bash noet
+
+set -e
+
+# source the Nos framework
+. /opt/nanobox/nos/common.sh
+
+# initialize Nos with the original arguments
+nos_init "$@"
+
+# source common lib
+. ${engine_lib_dir}/crystal.sh
+
+# install crystal
+install_runtime_packages
+
+# setup crystal env vars
+setup_crystal_env
+
+# Fetch crystal shards
+fetch_shards
+
+exit 0

bin/cleanup

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+#!/bin/bash
+# -*- mode: bash; tab-width: 2; -*-
+# vim: ts=2 sw=2 ft=bash noet
+
+exit 0

bin/compile

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+#!/bin/bash
+# -*- mode: bash; tab-width: 2; -*-
+# vim: ts=2 sw=2 ft=bash noet
+
+exit 0

bin/release

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+#!/bin/bash
+# -*- mode: bash; tab-width: 2; -*-
+# vim: ts=2 sw=2 ft=bash noet
+
+set -e
+
+# source the Nos framework
+. /opt/nanobox/nos/common.sh
+
+# initialize Nos with the original arguments
+nos_init "$@"
+
+# source common lib
+. ${engine_lib_dir}/crystal.sh
+
+# copy the release into the live code directory
+publish_release
+
+exit 0

files/env.d/LD_LIBRARY_PATH

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+/data/lib:/usr/lib:/usr/local/lib

files/env.d/LIBRARY_PATH

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+/data/lib:/usr/lib:/usr/local/lib

lib/crystal.sh

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+# -*- mode: bash; tab-width: 2; -*-
+# vim: ts=2 sw=2 ft=bash noet
+
+# Copy the code into the live directory which will be used to run the app
+publish_release() {
+  nos_print_bullet "Moving build into live app directory..."
+  rsync -a $(nos_code_dir)/ $(nos_app_dir)
+}
+
+# Determine the crystal runtime to install. This will first check
+# within the Boxfile, then will rely on default_runtime to
+# provide a sensible default
+runtime() {
+  echo $(nos_validate \
+    "$(nos_payload "config_runtime")" \
+    "string" "$(default_runtime)")
+}
+
+# Provide a default crystal version.
+default_runtime() {
+  echo "crystal-0.23"
+}
+
+# Install the crystal runtime along with any dependencies.
+install_runtime_packages() {
+  pkgs=("$(runtime)")
+
+  # add any client dependencies
+  pkgs+=("$(query_dependencies)")
+
+  nos_install ${pkgs[@]}
+}
+
+# Setup environment variables that the crystal compiler
+# and runtime use for building and running the app
+setup_crystal_env() {
+  nos_template_file \
+    "env.d/LD_LIBRARY_PATH" \
+    "$(nos_etc_dir)/env.d/LD_LIBRARY_PATH"
+
+  nos_template_file \
+    "env.d/LIBRARY_PATH" \
+    "$(nos_etc_dir)/env.d/LIBRARY_PATH"
+}
+
+# Uninstall build dependencies
+uninstall_build_packages() {
+  pkgs=()
+
+  # if pkgs isn't empty, let's uninstall what we don't need
+  if [[ ${#pkgs[@]} -gt 0 ]]; then
+    nos_uninstall ${pkgs[@]}
+  fi
+}
+
+# Fetch crystal shards from shard.yml
+fetch_shards() {
+  if [[ -f $(nos_code_dir)/shard.yml ]]; then
+
+    cd $(nos_code_dir)
+    nos_run_process "Fetching crystal shards" \
+      "crystal deps"
+    cd - >/dev/null
+  fi
+}
+
+# compiles a list of dependencies that will need to be installed
+query_dependencies() {
+  deps=()
+
+  # todo: add deps
+
+  echo "${deps[@]}"
+}

travis.yml

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+sudo: required
+
+services:
+  - docker
+
+before_install:
+  - docker pull nanobox/build
+
+script: sudo test/run_all.sh