Officially tired of aliasing `Repo` and importing `Ecto.Query` by hand every IEx session

new_phoenix_dot_iex.exs

#!/usr/bin/env elixir

ecto_import = "import Ecto.Query, only: [from: 2]"

mixexs =
  Path.join(["mix.exs"])
  |> File.read!

namespace =
  Regex.run(~r{defmodule\s+(\w+)\.}, mixexs)
  |> List.last

repo_alias = "alias #{namespace}.Repo"

models =
  Enum.map Path.wildcard("web/models/*.ex"), fn m ->
    Regex.run(~r{models/(\w+).ex}, m)
    |> List.last
    |> String.split("_")
    |> Enum.map(& String.capitalize &1)
    |> Enum.join("")
  end

aliases =
  models
  |> Enum.map(& "alias #{namespace}.#{&1}")
  |> Enum.join("\n")

iexexs_txt = "#{ecto_import}\n\n#{repo_alias}\n\n#{aliases}\n"

Path.join([".iex.exs"])
|> File.write(iexexs_txt, [:append])

usage

$ cd ~/elixir/hello_phoenix

$ head -1 mix.exs
defmodule HelloPhoenix.Mixfile do

$ tree web/models
web/models
├── comment.ex
├── post.ex
└── user.ex

$ curl -o new_phoenix_dot_iex.exs -L http://git.io/vCNRt
$ elixir new_phoenix_dot_iex.exs

$ cat .iex.exs
import Ecto.Query, only: [from: 2]

alias HelloPhoenix.Repo

alias HelloPhoenix.Comment
alias HelloPhoenix.Post
alias HelloPhoenix.User

$ iex -S mix
iex(1)> Repo.all from u in User, select: u

[debug] SELECT u0."id", u0."name", u0."inserted_at", u0."updated_at" FROM "users" AS u0 [] OK query=68.9ms queue=2.2ms

[%HelloPhoenix.User{__meta__: #Ecto.Schema.Metadata<:loaded>, id: 1,
inserted_at: #Ecto.DateTime<2015-10-18T07:19:31Z>, name: "Brad",
updated_at: #Ecto.DateTime<2015-10-18T07:19:31Z>}]