Add create and migrate command to release binary

It is needed to setup the database in production.

lib/release_tasks.ex

+defmodule Gaja.ReleaseTasks do
+  @start_apps [
+    :crypto,
+    :ssl,
+    :postgrex,
+    :ecto,
+    :ecto_sql # If using Ecto 3.0 or higher
+  ]
+
+  @repos Application.get_env(:gaja, :ecto_repos, [])
+
+  def create(_argv) do
+    run_db_create()
+  end
+
+  def migrate(_argv) do
+    start_services()
+    run_migrations()
+    stop_services()
+  end
+
+  def seed(_argv) do
+    start_services()
+
+    run_migrations()
+
+    run_seeds()
+
+    stop_services()
+  end
+
+  defp start_services do
+    IO.puts("Starting dependencies..")
+    # Start apps necessary for executing migrations
+    Enum.each(@start_apps, &Application.ensure_all_started/1)
+
+    # Start the Repo(s) for app
+    IO.puts("Starting repos..")
+    
+    # pool_size can be 1 for ecto < 3.0
+    Enum.each(@repos, & &1.start_link(pool_size: 2))
+  end
+
+  defp stop_services do
+    IO.puts("Success!")
+    :init.stop()
+  end
+
+  defp run_db_create do
+	Enum.each(@repos, &run_db_create_for/1)
+  end
+
+  defp run_db_create_for(repo) do
+	case repo.__adapter__.storage_up(repo.config) do
+      :ok ->
+		IO.puts "The database for #{inspect repo} has been created"
+      {:error, :already_up} ->
+		IO.puts "The database for #{inspect repo} has already been created"
+      {:error, term} when is_binary(term) ->
+        IO.puts "The database for #{inspect repo} couldn't be created: #{term}"
+      {:error, term} ->
+        IO.puts "The database for #{inspect repo} couldn't be created: #{inspect term}"
+    end
+  end
+
+  defp run_migrations do
+	Enum.each(@repos, &run_migrations_for/1)
+  end
+
+  defp run_migrations_for(repo) do
+    app = Keyword.get(repo.config(), :otp_app)
+    IO.puts("Running migrations for #{app}")
+    migrations_path = priv_path_for(repo, "migrations")
+    Ecto.Migrator.run(repo, migrations_path, :up, all: true)
+  end
+
+  defp run_seeds do
+    Enum.each(@repos, &run_seeds_for/1)
+  end
+
+  defp run_seeds_for(repo) do
+    # Run the seed script if it exists
+    seed_script = priv_path_for(repo, "seeds.exs")
+
+    if File.exists?(seed_script) do
+      IO.puts("Running seed script..")
+      Code.eval_file(seed_script)
+    end
+  end
+
+  defp priv_path_for(repo, filename) do
+    app = Keyword.get(repo.config(), :otp_app)
+
+    repo_underscore =
+      repo
+      |> Module.split()
+      |> List.last()
+      |> Macro.underscore()
+
+    priv_dir = "#{:code.priv_dir(app)}"
+
+    Path.join([priv_dir, repo_underscore, filename])
+  end
+end

mix.exs

@@ -47,7 +47,7 @@ defmodule Gaja.Mixfile do
       {:phauxth, "~> 2.1"},
       {:dialyxir, "~> 0.5", only: [:dev], runtime: false},
       {:credo, "~> 1.0.0", only: [:dev, :test], runtime: false},
-	  {:distillery, "~> 2.0"}
+      {:distillery, "~> 2.1.1"}
     ]
   end
 

mix.lock

@@ -3,6 +3,7 @@
   "artificery": {:hex, :artificery, "0.4.2", "3ded6e29e13113af52811c72f414d1e88f711410cac1b619ab3a2666bbd7efd4", [:mix], [], "hexpm"},
   "bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [:mix], [], "hexpm"},
   "comeonin": {:hex, :comeonin, "5.1.2", "fbbbbbfcf0f0e9900c0336d16c8d462edf838ba1759577e29cc5fbd7c28a4540", [:mix], [], "hexpm"},
+  "confex": {:hex, :confex, "3.4.0", "8b1c3cc7a93320291abb31223a178df19d7f722ee816c05a8070c8c9a054560d", [:mix], [], "hexpm"},
   "connection": {:hex, :connection, "1.0.4", "a1cae72211f0eef17705aaededacac3eb30e6625b04a6117c1b2db6ace7d5976", [:mix], [], "hexpm"},
   "cowboy": {:hex, :cowboy, "2.6.3", "99aa50e94e685557cad82e704457336a453d4abcb77839ad22dbe71f311fcc06", [:rebar3], [{:cowlib, "~> 2.7.3", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, "~> 1.7.1", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm"},
   "cowlib": {:hex, :cowlib, "2.7.3", "a7ffcd0917e6d50b4d5fb28e9e2085a0ceb3c97dea310505f7460ff5ed764ce9", [:rebar3], [], "hexpm"},
@@ -10,7 +11,7 @@
   "db_connection": {:hex, :db_connection, "2.1.1", "a51e8a2ee54ef2ae6ec41a668c85787ed40cb8944928c191280fe34c15b76ae5", [:mix], [{:connection, "~> 1.0.2", [hex: :connection, repo: "hexpm", optional: false]}], "hexpm"},
   "decimal": {:hex, :decimal, "1.8.0", "ca462e0d885f09a1c5a342dbd7c1dcf27ea63548c65a65e67334f4b61803822e", [:mix], [], "hexpm"},
   "dialyxir": {:hex, :dialyxir, "0.5.1", "b331b091720fd93e878137add264bac4f644e1ddae07a70bf7062c7862c4b952", [:mix], [], "hexpm"},
-  "distillery": {:hex, :distillery, "2.0.14", "25fc1cdad06282334dbf4a11b6e869cc002855c4e11825157498491df2eed594", [:mix], [{:artificery, "~> 0.2", [hex: :artificery, repo: "hexpm", optional: false]}], "hexpm"},
+  "distillery": {:hex, :distillery, "2.1.1", "f9332afc2eec8a1a2b86f22429e068ef35f84a93ea1718265e740d90dd367814", [:mix], [{:artificery, "~> 0.2", [hex: :artificery, repo: "hexpm", optional: false]}], "hexpm"},
   "ecto": {:hex, :ecto, "3.1.7", "fa21d06ef56cdc2fdaa62574e8c3ba34a2751d44ea34c30bc65f0728421043e5", [:mix], [{:decimal, "~> 1.6", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm"},
   "ecto_sql": {:hex, :ecto_sql, "3.1.6", "1e80e30d16138a729c717f73dcb938590bcdb3a4502f3012414d0cbb261045d8", [:mix], [{:db_connection, "~> 2.0", [hex: :db_connection, repo: "hexpm", optional: false]}, {:ecto, "~> 3.1.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:mariaex, "~> 0.9.1", [hex: :mariaex, repo: "hexpm", optional: true]}, {:myxql, "~> 0.2.0", [hex: :myxql, repo: "hexpm", optional: true]}, {:postgrex, "~> 0.14.0 or ~> 0.15.0", [hex: :postgrex, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm"},
   "elixir_make": {:hex, :elixir_make, "0.6.0", "38349f3e29aff4864352084fc736fa7fa0f2995a819a737554f7ebd28b85aaab", [:mix], [], "hexpm"},

rel/commands/create.sh

+release_ctl eval --mfa "Gaja.ReleaseTasks.create/1" --argv -- "$@"

rel/commands/migrate.sh

+release_ctl eval --mfa "Gaja.ReleaseTasks.migrate/1" --argv -- "$@"

rel/config.exs

-# Import all plugins from `rel/plugins`
-# They can then be used by adding `plugin MyPlugin` to
 # either an environment, or release definition, where
 # `MyPlugin` is the name of the plugin module.
 ~w(rel plugins *.exs)
@@ -7,10 +5,10 @@
 |> Path.wildcard()
 |> Enum.map(&Code.eval_file(&1))
 
-use Mix.Releases.Config,
-    # This sets the default release built by `mix release`
+use Distillery.Releases.Config,
+    # This sets the default release built by `mix distillery.release`
     default_release: :default,
-    # This sets the default environment used by `mix release`
+    # This sets the default environment used by `mix distillery.release`
     default_environment: Mix.env()
 
 # For a full list of config options for both releases
@@ -31,19 +29,19 @@ environment :dev do
   # dev mode.
   set dev_mode: true
   set include_erts: false
-  set cookie: :"fv!fA=nxKrNd0d<{o=|tZL~~%(<}eS>lp!GxNTil4B[Z3V5BUA.%:izGt{MBBpd]"
+  set cookie: :"3u(=d?XK@~45*o`)I1sSqXhySfsw}~v9gN<c.{>jTKuz!Gd}0N6HB9&nvn.L3VTh"
 end
 
 environment :prod do
   set include_erts: true
   set include_src: false
-  set cookie: :"5wRa:HSYu2Cx/U:tKOfS7q}$}$2o%F3<fd@9_GG/$aU[{h761~4^$l:L]qJ51xvx"
+  set cookie: :"z|gSg$h&{.o6b_XixQY72wdES|v4Jif`3}=>dRwS/Ch|E&6<gZNOtes:bG_niq.2"
   set vm_args: "rel/vm.args"
 end
 
 # You may define one or more releases in this file.
 # If you have not set a default release, or selected one
-# when running `mix release`, the first release in the file
+# when running `mix distillery.release`, the first release in the file
 # will be used by default
 
 release :gaja do
@@ -51,5 +49,9 @@ release :gaja do
   set applications: [
     :runtime_tools
   ]
+  set commands: [
+    create: "rel/commands/create.sh",
+    migrate: "rel/commands/migrate.sh"
+  ]
 end