Deploy Phoenix Elixir by mina

deploy.rb

require 'mina/bundler'
require 'mina/git'
require 'mina/rbenv'

set :domain, 'your_domain.com'
set :deploy_to, '/home/deployer/app_name'
set :repository, 'git@github.com:user_name/app_name'
set :branch,  ENV["brunch"] || 'master'

set :app_name, "app_name"
set :shared_paths, %w(
  config/prod.secret.exs
  node_modules
  bower_components
  deps
  rel
  _build
)

set :user, 'deployer'
set :forward_agent, true
#set :identity_file, '~/.ssh/id_rsa.pem'
set :log_path, "#{deploy_to}/#{current_path}/rel/#{app_name}/log"

task :environment do
  queue %[source ~/.asdf/asdf.sh]
  queue %[export PATH=$HOME/.asdf/bin:$HOME/.asdf/shims:$PATH]
  queue %[export MIX_ENV=prod]
end

task :setup => :environment do
  queue %[mkdir -p "#{deploy_to}/#{shared_path}/node_modules"]
  queue %[mkdir -p "#{deploy_to}/#{shared_path}/bower_components"]
  queue %[mkdir -p "#{deploy_to}/#{shared_path}/deps"]
  queue %[mkdir -p "#{deploy_to}/#{shared_path}/_build"]
  queue %[mkdir -p "#{deploy_to}/#{shared_path}/rel"]
  queue %[mkdir -p "#{deploy_to}/#{shared_path}/config"]
  queue %[touch "#{deploy_to}/#{shared_path}/config/prod.secret.exs"]
  
  queue %[ if ! asdf plugin-list | grep erlang; then asdf plugin-add erlang https://github.com/HashNuke/asdf-erlang.git; fi]
  queue %[ if ! asdf plugin-list | grep elixir; then asdf plugin-add elixir https://github.com/HashNuke/asdf-elixir.git; fi]
  queue %[ erlang_version=$(awk '/erlang/ { print $2 }' .tool-versions) && asdf install erlang ${erlang_version} ]
  queue %[ elixir_version=$(awk '/elixir/ { print $2 }' .tool-versions) && asdf install elixir ${elixir_version} ]
  queue %[ nodejs_version=$(awk '/nodejs/ { print $2 }' .tool-versions) && asdf install nodejs ${nodejs_version} ]
end

desc "Deploys the current version to the server."
task :deploy => :environment do
  deploy do
    invoke :'git:clone'
    invoke :'deploy:link_shared_paths'

    queue %[mix local.hex --force]
    queue %[mix local.rebar --force]
    queue %[mix deps.get --production]

    queue %[npm install]
    queue %[$(npm bin)/bower install]
    queue %[$(npm bin)/brunch build --production]
    queue %[mix phoenix.digest]

    queue %[mix do compile, release]
    queue %[mix ecto.migrate]
    #queue %[mix run sitemaps.exs]

    to :launch do
      invoke :'elixir:stop'
      invoke :'elixir:start'
    end

    to :clean do
      queue 'echo "Failed deployment"'
    end
  end
end

namespace :elixir do
  desc "start"
  task :start do
    queue "echo 'Elixir #{cmd}'"
    queue "cd #{deploy_to}/#{current_path}/rel/#{app_name}/bin && ./#{app_name} start"
  end

  desc "stop"
  task :stop do
    queue "echo 'Elixir stop'"
    queue "cd #{deploy_to}/#{current_path}/rel/#{app_name}/bin && ./#{app_name} stop"
  end

  desc "restart"
  task :restart do
    queue "echo 'Elixir restart'"
    queue "cd #{deploy_to}/#{current_path}/rel/#{app_name}/bin && ./#{app_name} restart"
  end

  desc "ping"
  task :ping do
    queue "echo 'Elixir ping'"
    queue "cd #{deploy_to}/#{current_path}/rel/#{app_name}/bin && ./#{app_name} ping"
  end
end

desc "Show logs"
task :logs do
  queue 'echo "Contents of the log file are as follows:"'
  queue "tail -n 100 -f `/bin/ls -1td #{log_path}/*| /usr/bin/head -n1`"
end