Feature Request: Encoding capabilities

[lud]

Hello,

I am trying to generate some github config files with Elixir. To do so I use a YAML template (too keep newlines and comments), but I have to inject bits of data inside.

For now I use JSON:

jobs:
  verify:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        elixir: <%= json @matrix_elixir %>
        otp: <%= json @matrix_otp %>
        exclude: <%= json @matrix_exclude %>

To have better output capabilities, would you like to consider:

• Allowing a fun/1 to be given as sort maps, in addition to boolean values. That function would return a term that would be used with Enum.sort_by/2. For instance:

  # version first, then jobs, then sort by key
  sorter = fn
    {:version, _} -> {0, 1}
    {:jobs, _} ->    {0, 2}
    {k, _} ->        {1, k}
  end
  Ymlr.document!(data, sort_maps: sorter)

• Provide a function to encode a document without the --- and starting at some arbitrary indentation level:

  # version first, then jobs, then sort by key
  def yaml(data, indent) do
    Ymlr.value!(data, start_indent: indent)
  end

  jobs:
    verify:
      runs-on: ubuntu-latest
  
      strategy:
        matrix:
          elixir: 
            <%= yaml @matrix_elixir, 5 %>
          otp: 
            <%= yaml @matrix_otp, 5 %>
          exclude: 
            <%= yaml @matrix_exclude, 5 %>

What do you think about that?