Docout

Docout is a multi-purpose documentation tool. Parse function docs and meta and implement one or more formatters to use the data to generate files like API specifications, onboarding guides, etc. Files will be automatically updated every time the app compiles, so you just need to save changes once.

The following were the main goals and inspiration for this library:

• Run during compilation phase (like PhoenixSwagger)
• Use native Elixir doc API (like OpenApiSpex Controller syntax)
• Support multiple output formats (like Bureaucrat)

For more information about the rationale behind the project, or to contact me about the project, see https://elixirforum.com/t/docout-flexible-documentation-generator/45227

Installation

1. Add {:docout, github: "tfwright/docout", branch: "main", runtime: false} to your app's deps

2. Add :docout to your app's compiler list

Basic usage

1. Add a module that uses Docout and implements the format/1 function:

defmodule MyDocFormatter do
  use Docout

  def format(_doc_list) do
    """
    My docs!
    """
  end

2. Add the following to your app's compile time config (config.exs):

config :docout,
  app_name: :your_app,
  formatters: [MyDocFormatter]

3. Add docout: true to any module's metadata to include its function docs in the list passed to the format function.

That's it! Now when your app compiles, Docout will write a file with the output of your formatter to /docs/[underscored module name].

Note: Docout itself has been configured to use the Docout.Demo.Formatter formatter to generate docs/demo.md.

Advanced usage

Configure where the doc file is written

``` defmodule MyDocFormatter do use Docout, output_path: "other_dir/mydocs.html" end ```

output_path should be a path relative to your app's root

Select which formatters should process a module

defmodule MyModule do
  @moduledoc docout: [XFormatter, YFormatter]
end

Customize parsing

In order to simplify formatting logic, you might want to change how Docout preprocesses the docs for a module. Set the value of the parse_function option to any 2 arity function reference to be invoked instead of Docout.parse/2

defmodule MyDocFormatter do
  # this formatter doesn't care about the module being documented
  use Docout, parse_function: fn mod, docs -> docs end
end

Only compile in specific environments

# mix.exs
def project do
  # ...
  compilers: Mix.compilers() ++ compilers(Mix.env())
  # ...
end

# ...

defp compilers(:dev), do: [:docout]
defp compilers(_), do: []