gottfrois

###############################
# Stage wkhtmltopdf
FROM madnight/docker-alpine-wkhtmltopdf as wkhtmltopdf

######################
# Stage: ruby
FROM ruby:2.5.1-alpine3.7 as ruby
LABEL description="Base ruby image used by other stages"

######################

gottfrois

"""
query ListRecords($first: Int){
  records(first: $first) {
    edges {
      node {
        id
      }
    }
  }
}

gottfrois

defmodule MyApp.StreamPaginator do
  def stream(query, args \\ %{first: 100}) do
    init = fn -> end
    next = fn -> end
    stop = fn -> end
    
    Stream.resource(init, next, stop)
  end
end

gottfrois

defmodule MyApp.StreamPaginator do
  def stream(query, args \\ %{first: 100}) do
    init = fn -> request(query, args) end
    next = fn -> nil end
    stop = fn -> nil end

    Stream.resource(init, next, stop)
  end

  defp request(query, args) do

gottfrois

defmodule MyApp.StreamPaginator do
  def stream(query, args \\ %{first: 100}) do
    # ...
    next = &next/1
    
    # ...
  end
  
  # ...

gottfrois

defmodule MyApp.StreamPaginator do
  def stream(query, args \\ %{first: 100}) do
    init = fn -> request(query, args) end
    next = &next/1
    stop = &Function.identity/1

    Stream.resource(init, next, stop)
  end

  defp request(query, args) do

gottfrois

defp next({nil, _query, _args} = acc), do: {:halt, acc}
defp next({%{"hasNextPage" => false}, _query, _args} = acc), do: {:halt, acc}

gottfrois

query {
  records(first: 100) {
    pageInfo {
      hasNextPage
      endCursor
    }
    edges {
      node {
        id
      }

gottfrois

FROM ruby:2.5.1-alpine3.7

WORKDIR /home/app

RUN apk add --update --no-cache \
   build-base \
   libxml2-dev \
   libxslt-dev \
   nodejs \
   tzdata

gottfrois

###############################
# Stage wkhtmltopdf
FROM madnight/docker-alpine-wkhtmltopdf as wkhtmltopdf