commit a6776fdca8e03041d39d7d39da0aba3f441909ef
Author: Joakim Nylén <me@jnylen.nu>
Date:   Thu Apr 11 23:39:59 2019 +0200

    First commit

diff --git a/.formatter.exs b/.formatter.exs
new file mode 100644
index 0000000..d2cda26
--- /dev/null
+++ b/.formatter.exs
@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..54511ad
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,26 @@
+# 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").
+xler-*.tar
+
+/priv
+/.elixir_ls
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..25f16e9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,53 @@
+# Xler
+
+Xler uses the Calamine Rust library to get contents of Excel files.
+
+**Calamine supports:**
+
+- excel (xls, xlsx, xlsm, xlsb, xla, xlam)
+- opendocument spreadsheets (ods)
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `xler` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:xler, "~> 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/xler](https://hexdocs.pm/xler).
+
+## Worksheets
+
+To get the worksheets of a file you use:
+
+```elixir
+Xler.worksheets("filename.xls")
+```
+
+and it will return as a tuple:
+
+```elixir
+{:ok, ["Sheet 1"]}
+```
+
+## Parse
+
+To get the data of a worksheet you use:
+
+```elixir
+Xler.parse("filename.xls", "Sheet 1")
+```
+
+and it will return as a tuple:
+
+```elixir
+{:ok, [["Date", "Time"]]}
+```
diff --git a/config/config.exs b/config/config.exs
new file mode 100644
index 0000000..70c1dba
--- /dev/null
+++ b/config/config.exs
@@ -0,0 +1,30 @@
+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+# This configuration is loaded before any dependency and is restricted
+# to this project. If another project depends on this project, this
+# file won't be loaded nor affect the parent project. For this reason,
+# if you want to provide default values for your application for
+# third-party users, it should be done in your "mix.exs" file.
+
+# You can configure your application as:
+#
+#     config :xler, key: :value
+#
+# and access this configuration in your application as:
+#
+#     Application.get_env(:xler, :key)
+#
+# You can also configure a third-party app:
+#
+#     config :logger, level: :info
+#
+
+# It is also possible to import configuration files, relative to this
+# directory. For example, you can emulate configuration per environment
+# by uncommenting the line below and defining dev.exs, test.exs and such.
+# Configuration from the imported file will override the ones defined
+# here (which is why it is important to import them last).
+#
+#     import_config "#{Mix.env()}.exs"
diff --git a/lib/xler.ex b/lib/xler.ex
new file mode 100644
index 0000000..8327c89
--- /dev/null
+++ b/lib/xler.ex
@@ -0,0 +1,31 @@
+defmodule Xler do
+  alias Xler.Native
+
+  @moduledoc """
+  Documentation for Xler.
+  """
+
+  @doc """
+  Show the available worksheets for file.
+
+  ## Examples
+
+      iex> Xler.worksheets("file.xls")
+      {:ok, ["Sheet 1"]}
+
+  """
+  def worksheets(filename), do: filename |> Native.worksheets()
+
+  @doc """
+  Parses a specific worksheet from a file
+
+  Returns an list (of rows) with a list of columns
+
+  ## Examples
+
+      iex> Xler.parse("file.xls", "Sheet 1")
+      {:ok, [["Date", "Text"]]}
+
+  """
+  def parse(filename, worksheet), do: filename |> Native.parse(worksheet)
+end
diff --git a/lib/xler/native.ex b/lib/xler/native.ex
new file mode 100644
index 0000000..f478144
--- /dev/null
+++ b/lib/xler/native.ex
@@ -0,0 +1,8 @@
+defmodule Xler.Native do
+  use Rustler, otp_app: :xler, crate: :xler_native
+
+  def parse(_filename, _worksheet), do: error()
+  def worksheets(_filename), do: error()
+
+  defp error, do: :erlang.nif_error(:nif_not_loaded)
+end
diff --git a/mix.exs b/mix.exs
new file mode 100644
index 0000000..4a82d03
--- /dev/null
+++ b/mix.exs
@@ -0,0 +1,29 @@
+defmodule Xler.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :xler,
+      version: "0.1.0",
+      elixir: "~> 1.8",
+      start_permanent: Mix.env() == :prod,
+      compilers: [:rustler] ++ Mix.compilers(),
+      rustler_crates: [xler_native: []],
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:rustler, "~> 0.20.0"}
+    ]
+  end
+end
diff --git a/mix.lock b/mix.lock
new file mode 100644
index 0000000..e6ee391
--- /dev/null
+++ b/mix.lock
@@ -0,0 +1,3 @@
+%{
+  "rustler": {:hex, :rustler, "0.20.0", "6b2cc8149700a7b1df2226dbe273ec1f9449318cad3bd3b5b68125a4cf1f438b", [:mix], [], "hexpm"},
+}
diff --git a/native/xler_native/Cargo.lock b/native/xler_native/Cargo.lock
new file mode 100644
index 0000000..485c306
--- /dev/null
+++ b/native/xler_native/Cargo.lock
@@ -0,0 +1,388 @@
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diff --git a/native/xler_native/Cargo.toml b/native/xler_native/Cargo.toml
new file mode 100644
index 0000000..062483d
--- /dev/null
+++ b/native/xler_native/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "xler_native"
+version = "0.1.0"
+authors = []
+
+[lib]
+name = "xler_native"
+path = "src/lib.rs"
+crate-type = ["dylib"]
+
+[dependencies]
+rustler = "0.20.0"
+rustler_codegen = "0.20.0"
+lazy_static = "1.0"
+calamine = "0.15.4"
\ No newline at end of file
diff --git a/native/xler_native/README.md b/native/xler_native/README.md
new file mode 100644
index 0000000..c1e1e16
--- /dev/null
+++ b/native/xler_native/README.md
@@ -0,0 +1,22 @@
+# Nif for Elixir.Xler.Native
+
+## To build the NIF module:
+
+- Make sure your projects `mix.exs` has the `:rustler` compiler listed in the `project` function: `compilers: [:rustler] ++ Mix.compilers()` If there already is a `:compilers` list, you should append `:rustler` to it.
+- Add your crate to the `rustler_crates` attribute in the `project function. [See here](https://hexdocs.pm/rustler/basics.html#crate-configuration).
+- Your NIF will now build along with your project.
+
+## To load the NIF:
+
+```elixir
+defmodule Xler.Native do
+    use Rustler, otp_app: <otp-app>, crate: "xler_native"
+
+    # When your NIF is loaded, it will override this function.
+    def add(_a, _b), do: :erlang.nif_error(:nif_not_loaded)
+end
+```
+
+## Examples
+
+[This](https://github.com/hansihe/NifIo) is a complete example of a NIF written in Rust.
diff --git a/native/xler_native/src/lib.rs b/native/xler_native/src/lib.rs
new file mode 100644
index 0000000..2fab42b
--- /dev/null
+++ b/native/xler_native/src/lib.rs
@@ -0,0 +1,76 @@
+#[macro_use] extern crate rustler;
+#[macro_use] extern crate rustler_codegen;
+#[macro_use] extern crate lazy_static;
+extern crate calamine;
+
+use rustler::{Env, NifResult, Encoder, Term};
+use calamine::{Reader, open_workbook_auto};
+use calamine::Error as CaError;
+
+mod atoms {
+    rustler_atoms! {
+        atom ok;
+        atom error;
+
+        // Posix
+        atom enoent; // File does not exist
+        atom eacces; // Permission denied
+        atom epipe;  // Broken pipe
+        atom eexist; // File exists
+    }
+}
+
+rustler_export_nifs! {
+    "Elixir.Xler.Native",
+    [("parse", 2, parse),
+    ("worksheets", 1, worksheets)],
+    None
+}
+
+fn io_error_to_term<'a>(env: Env<'a>, err: &CaError) -> Term<'a> {
+    let error = match err {
+        _ => format!("{}", err).encode(env),
+    };
+
+    (atoms::error(), error).encode(env)
+}
+
+fn worksheets<'a>(env: Env<'a>, args: &[Term<'a>]) -> NifResult<Term<'a>> {
+    let filename: String = args[0].decode()?;
+
+    match open_workbook_auto(&filename) {
+        Err(ref error) => return Ok(io_error_to_term(env, error)),
+        Ok(ref inner) => Ok((atoms::ok(), inner.sheet_names().to_owned()).encode(env)),
+    }
+}
+
+
+fn parse<'a>(env: Env<'a>, args: &[Term<'a>]) -> NifResult<Term<'a>> {
+    let filename: String = try!(args[0].decode());
+    let sheetname: String = try!(args[1].decode());
+
+    let mut excel = match open_workbook_auto(&filename) {
+        Err(ref error) => return Ok(io_error_to_term(env, error)),
+        Ok(inner) => inner,
+    };
+
+    if let Some(Ok(range)) = excel.worksheet_range(&sheetname) {
+        let row: Vec<(Vec<String>)> = range
+                        .rows()
+                        .into_iter()
+                        .enumerate()
+                        .map(|(_i, col)| 
+                            col
+                            .iter()
+                            .map(|c|
+                                c.to_string()
+                            )
+                            .collect::<Vec<_>>()
+                        )
+                        .collect::<Vec<_>>();
+        
+        Ok((atoms::ok(), row.encode(env)).encode(env))
+    } else {
+        Ok((atoms::error(), "Couldnt find the worksheet").encode(env))
+    }
+}
\ No newline at end of file
diff --git a/test/test_helper.exs b/test/test_helper.exs
new file mode 100644
index 0000000..869559e
--- /dev/null
+++ b/test/test_helper.exs
@@ -0,0 +1 @@
+ExUnit.start()
diff --git a/test/xler_test.exs b/test/xler_test.exs
new file mode 100644
index 0000000..d413949
--- /dev/null
+++ b/test/xler_test.exs
@@ -0,0 +1,8 @@
+defmodule XlerTest do
+  use ExUnit.Case
+  doctest Xler
+
+  test "greets the world" do
+    assert Xler.hello() == :world
+  end
+end