start elixir conversion

9 files changed, 112 insertions, 0 deletions

diff --git a/apps/util/.formatter.exs b/apps/util/.formatter.exs
new file mode 100644
index 0000000..d2cda26
--- /dev/null
+++ b/apps/util/.formatter.exs
@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]
diff --git a/apps/util/.gitignore b/apps/util/.gitignore
new file mode 100644
index 0000000..d8dbee4
--- /dev/null
+++ b/apps/util/.gitignore
@@ -0,0 +1,24 @@
+# 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").
+util-*.tar
+
diff --git a/apps/util/README.md b/apps/util/README.md
new file mode 100644
index 0000000..4b69d4c
--- /dev/null
+++ b/apps/util/README.md
@@ -0,0 +1,21 @@
+# Thulani.Util
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `util` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:util, "~> 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/util](https://hexdocs.pm/util).
+
diff --git a/apps/util/lib/thulani/util.ex b/apps/util/lib/thulani/util.ex
new file mode 100644
index 0000000..fad5e39
--- /dev/null
+++ b/apps/util/lib/thulani/util.ex
@@ -0,0 +1,2 @@
+defmodule Thulani.Util do
+end
diff --git a/apps/util/lib/thulani/util/compose.ex b/apps/util/lib/thulani/util/compose.ex
new file mode 100644
index 0000000..cd4435e
--- /dev/null
+++ b/apps/util/lib/thulani/util/compose.ex
@@ -0,0 +1,13 @@
+defmodule Thulani.Util.Compose do
+  import Thulani.Util.Curry
+
+  def f <|> g, do: compose(f, g)
+
+  def compose(f, g) when is_function(g) do
+    fn arg -> compose(curry(f), curry(g).(arg)) end
+  end
+
+  def compose(f, arg) do
+    f.(arg)
+  end
+end
diff --git a/apps/util/lib/thulani/util/curry.ex b/apps/util/lib/thulani/util/curry.ex
new file mode 100644
index 0000000..b03afab
--- /dev/null
+++ b/apps/util/lib/thulani/util/curry.ex
@@ -0,0 +1,16 @@
+defmodule Thulani.Util.Curry do
+  @moduledoc false
+
+  def curry(f) do
+    {_, arity} = :erlang.fun_info(f, :arity)
+    curry(f, arity, [])
+  end
+
+  defp curry(f, 0, args) do
+    apply(f, Enum.reverse(args))
+  end
+
+  defp curry(f, arity, args) do
+    fn arg -> curry(f, arity - 1, [arg | args]) end
+  end
+end
diff --git a/apps/util/mix.exs b/apps/util/mix.exs
new file mode 100644
index 0000000..a0caff9
--- /dev/null
+++ b/apps/util/mix.exs
@@ -0,0 +1,27 @@
+defmodule Thulani.Util.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :util,
+      version: "0.1.0",
+      build_path: "../../_build",
+      config_path: "../../config/config.exs",
+      deps_path: "../../deps",
+      lockfile: "../../mix.lock",
+      elixir: "~> 1.9",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  defp deps do
+    []
+  end
+end
diff --git a/apps/util/test/test_helper.exs b/apps/util/test/test_helper.exs
new file mode 100644
index 0000000..869559e
--- /dev/null
+++ b/apps/util/test/test_helper.exs
@@ -0,0 +1 @@
+ExUnit.start()
diff --git a/apps/util/test/thulani/util_test.exs b/apps/util/test/thulani/util_test.exs
new file mode 100644
index 0000000..9246f40
--- /dev/null
+++ b/apps/util/test/thulani/util_test.exs
@@ -0,0 +1,4 @@
+defmodule Thulani.UtilTest do
+  use ExUnit.Case
+  doctest Thulani.Util
+end