LuckyTemplate::Fileable

An interface for a file

Simple example using IO:

class Hello
  include LuckyTemplate::Fileable

  def to_file(io : IO) : Nil
    io << "hello"
  end
end

Example using ECR templates:

require "ecr"

class Hello
  include LuckyTemplate::Fileable

  def to_file(io : IO) : Nil
    to_s(io)
  end

  ECR.def_to_s "hello.ecr"
end

Example using Process to run envsubst:

class Hello
  include LuckyTemplate::Fileable

  def to_file(io : IO) : Nil
    input = IO::Memory.new("Hello $NAME!")
    Process.run(
      command: "envsubst",
      input: input,
      output: io,
      env: {
        "NAME" => "World",
      }
    )
  end
end