Code for step 1

Author: akoutmos

.formatter.exs

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+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

.gitignore

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+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+elixir_popularity-*.tar
+

README.md

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+# ElixirPopularity
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `elixir_popularity` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:elixir_popularity, "~> 0.1.0"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at [https://hexdocs.pm/elixir_popularity](https://hexdocs.pm/elixir_popularity).
+

lib/elixir_popularity.ex

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+defmodule ElixirPopularity do
+  @moduledoc """
+  Documentation for ElixirPopularity.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> ElixirPopularity.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end

lib/elixir_popularity/application.ex

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+defmodule ElixirPopularity.Application do
+  # See https://hexdocs.pm/elixir/Application.html
+  # for more information on OTP Applications
+  @moduledoc false
+
+  use Application
+
+  def start(_type, _args) do
+    children = [
+      # Starts a worker by calling: ElixirPopularity.Worker.start_link(arg)
+      # {ElixirPopularity.Worker, arg}
+    ]
+
+    # See https://hexdocs.pm/elixir/Supervisor.html
+    # for other strategies and supported options
+    opts = [strategy: :one_for_one, name: ElixirPopularity.Supervisor]
+    Supervisor.start_link(children, opts)
+  end
+end

mix.exs

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+defmodule ElixirPopularity.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :elixir_popularity,
+      version: "0.1.0",
+      elixir: "~> 1.9",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger],
+      mod: {ElixirPopularity.Application, []}
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:jason, "~> 1.1.2"},
+      {:httpoison, "~> 1.6.1"},
+      {:broadway, "~> 0.4.0"},
+      {:broadway_rabbitmq, "~> 0.4.0"},
+      {:ecto_sql, "~> 3.0"},
+      {:postgrex, ">= 0.0.0"},
+      {:gen_rmq, "~> 2.3.0"}
+    ]
+  end
+end

mix.lock

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+%{
+  "amqp": {:hex, :amqp, "1.1.0", "86bbea4f4d21b2941d98af1260bdd5ce94978678eb96059eb3065d506970cc16", [:mix], [{:amqp_client, "~> 3.7.9", [hex: :amqp_client, repo: "hexpm", optional: false]}, {:goldrush, "~> 0.1.0", [hex: :goldrush, repo: "hexpm", optional: false]}, {:jsx, "~> 2.9", [hex: :jsx, repo: "hexpm", optional: false]}, {:lager, "~> 3.6.5", [hex: :lager, repo: "hexpm", optional: false]}, {:rabbit_common, "~> 3.7.9", [hex: :rabbit_common, repo: "hexpm", optional: false]}, {:ranch, "~> 1.6.2", [hex: :ranch, repo: "hexpm", optional: false]}, {:ranch_proxy_protocol, "~> 2.1.1", [hex: :ranch_proxy_protocol, repo: "hexpm", optional: false]}, {:recon, "~> 2.3.6", [hex: :recon, repo: "hexpm", optional: false]}], "hexpm"},
+  "amqp_client": {:hex, :amqp_client, "3.7.9", "ebef998500c31d4954e882868806258a9cebf01dd6c76804b1a2efdb454753fc", [:make, :rebar3], [{:rabbit_common, "3.7.9", [hex: :rabbit_common, repo: "hexpm", optional: false]}], "hexpm"},
+  "broadway": {:hex, :broadway, "0.4.0", "b8daf580baed44347a9690449f9d8d7a308c1ca086648397d1a88eea893d047e", [:mix], [{:gen_stage, "~> 0.14", [hex: :gen_stage, repo: "hexpm", optional: false]}], "hexpm"},
+  "broadway_rabbitmq": {:hex, :broadway_rabbitmq, "0.4.0", "5e43ab4d7a0c95521db5368f4b4f7776b732bd0558fb0c55fe424e51d48aafb3", [:mix], [{:amqp, "~> 1.1", [hex: :amqp, repo: "hexpm", optional: false]}, {:broadway, "~> 0.4.0", [hex: :broadway, repo: "hexpm", optional: false]}], "hexpm"},
+  "certifi": {:hex, :certifi, "2.5.1", "867ce347f7c7d78563450a18a6a28a8090331e77fa02380b4a21962a65d36ee5", [:rebar3], [{:parse_trans, "~>3.3", [hex: :parse_trans, repo: "hexpm", optional: false]}], "hexpm"},
+  "connection": {:hex, :connection, "1.0.4", "a1cae72211f0eef17705aaededacac3eb30e6625b04a6117c1b2db6ace7d5976", [:mix], [], "hexpm"},
+  "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"},
+  "ecto": {:hex, :ecto, "3.2.5", "76c864b77948a479e18e69cc1d0f0f4ee7cced1148ffe6a093ff91eba644f0b5", [: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, "3.2.1", "4eed4100cbb2abcff10c46660d6613693807bf64f1b865f414daccf762d3758d", [:mix], [{:db_connection, "~> 2.1", [hex: :db_connection, repo: "hexpm", optional: false]}, {:ecto, "~> 3.2.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:myxql, "~> 0.2.0", [hex: :myxql, repo: "hexpm", optional: true]}, {:postgrex, "~> 0.15.0", [hex: :postgrex, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm"},
+  "gen_rmq": {:hex, :gen_rmq, "2.3.0", "f7dfaf355f0edeae29b0b97af216d9c02c9469c3f868370e29640afb631d13a7", [:mix], [{:amqp, "~> 1.1", [hex: :amqp, repo: "hexpm", optional: false]}], "hexpm"},
+  "gen_stage": {:hex, :gen_stage, "0.14.3", "d0c66f1c87faa301c1a85a809a3ee9097a4264b2edf7644bf5c123237ef732bf", [:mix], [], "hexpm"},
+  "goldrush": {:hex, :goldrush, "0.1.9", "f06e5d5f1277da5c413e84d5a2924174182fb108dabb39d5ec548b27424cd106", [:rebar3], [], "hexpm"},
+  "hackney": {:hex, :hackney, "1.15.2", "07e33c794f8f8964ee86cebec1a8ed88db5070e52e904b8f12209773c1036085", [:rebar3], [{:certifi, "2.5.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "6.0.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "1.0.1", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "1.1.5", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm"},
+  "httpoison": {:hex, :httpoison, "1.6.2", "ace7c8d3a361cebccbed19c283c349b3d26991eff73a1eaaa8abae2e3c8089b6", [:mix], [{:hackney, "~> 1.15 and >= 1.15.2", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm"},
+  "idna": {:hex, :idna, "6.0.0", "689c46cbcdf3524c44d5f3dde8001f364cd7608a99556d8fbd8239a5798d4c10", [:rebar3], [{:unicode_util_compat, "0.4.1", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm"},
+  "jason": {:hex, :jason, "1.1.2", "b03dedea67a99223a2eaf9f1264ce37154564de899fd3d8b9a21b1a6fd64afe7", [:mix], [{:decimal, "~> 1.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm"},
+  "jsx": {:hex, :jsx, "2.9.0", "d2f6e5f069c00266cad52fb15d87c428579ea4d7d73a33669e12679e203329dd", [:mix, :rebar3], [], "hexpm"},
+  "lager": {:hex, :lager, "3.6.5", "831910109f3fcb503debf658ca0538836b348c58bfbf349a6d48228096ce9040", [:rebar3], [{:goldrush, "0.1.9", [hex: :goldrush, repo: "hexpm", optional: false]}], "hexpm"},
+  "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm"},
+  "mimerl": {:hex, :mimerl, "1.2.0", "67e2d3f571088d5cfd3e550c383094b47159f3eee8ffa08e64106cdf5e981be3", [:rebar3], [], "hexpm"},
+  "parse_trans": {:hex, :parse_trans, "3.3.0", "09765507a3c7590a784615cfd421d101aec25098d50b89d7aa1d66646bc571c1", [:rebar3], [], "hexpm"},
+  "postgrex": {:hex, :postgrex, "0.15.1", "23ce3417de70f4c0e9e7419ad85bdabcc6860a6925fe2c6f3b1b5b1e8e47bf2f", [:mix], [{:connection, "~> 1.0", [hex: :connection, repo: "hexpm", optional: false]}, {:db_connection, "~> 2.1", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.5", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm"},
+  "rabbit_common": {:hex, :rabbit_common, "3.7.9", "542d2eb8ef8f76e5346b30665604d8d63b8d5cf47d1878243cec44d1642c4435", [:make, :rebar3], [{:jsx, "2.9.0", [hex: :jsx, repo: "hexpm", optional: false]}, {:lager, "3.6.5", [hex: :lager, repo: "hexpm", optional: false]}, {:ranch, "1.6.2", [hex: :ranch, repo: "hexpm", optional: false]}, {:ranch_proxy_protocol, "2.1.1", [hex: :ranch_proxy_protocol, repo: "hexpm", optional: false]}, {:recon, "2.3.6", [hex: :recon, repo: "hexpm", optional: false]}], "hexpm"},
+  "ranch": {:hex, :ranch, "1.6.2", "6db93c78f411ee033dbb18ba8234c5574883acb9a75af0fb90a9b82ea46afa00", [:rebar3], [], "hexpm"},
+  "ranch_proxy_protocol": {:hex, :ranch_proxy_protocol, "2.1.1", "3c4723327166d2d63c0405f4914e2e471c6de362cc844e9b203af5763e7c9d25", [:rebar3], [{:ranch, "1.6.2", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm"},
+  "recon": {:hex, :recon, "2.3.6", "2bcad0cf621fb277cabbb6413159cd3aa30265c2dee42c968697988b30108604", [:rebar3], [], "hexpm"},
+  "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.5", "6eaf7ad16cb568bb01753dbbd7a95ff8b91c7979482b95f38443fe2c8852a79b", [:make, :mix, :rebar3], [], "hexpm"},
+  "telemetry": {:hex, :telemetry, "0.4.0", "8339bee3fa8b91cb84d14c2935f8ecf399ccd87301ad6da6b71c09553834b2ab", [:rebar3], [], "hexpm"},
+  "unicode_util_compat": {:hex, :unicode_util_compat, "0.4.1", "d869e4c68901dd9531385bb0c8c40444ebf624e60b6962d95952775cac5e90cd", [:rebar3], [], "hexpm"},
+}

test/elixir_popularity_test.exs

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+defmodule ElixirPopularityTest do
+  use ExUnit.Case
+  doctest ElixirPopularity
+
+  test "greets the world" do
+    assert ElixirPopularity.hello() == :world
+  end
+end

test/test_helper.exs

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+ExUnit.start()