Dynamic Diagrams

Mix.install([{:kino, "~> 0.7.0"}])

Section

defmodule GraphvizEx do
  def new(source) do
    {body, _} =
      System.shell("echo '#{source}' | /usr/local/bin/dot -Tpng", stderr_to_stdout: true)

    Kino.Image.new(body, :png)
  end
end

defmodule PlantUmlEx do
  def new(source) do
    {body, _} =
      System.shell("echo '#{source}' | /usr/local/bin/plantuml -p", stderr_to_stdout: true)

    Kino.Image.new(body, :png)
  end
end

data = """
digraph architecture {
  rankdir=LR;

  subgraph client_side_apps {
      front_end -> {auth_api, my_app_api};
      extension -> {auth_api, my_app_api};
      
      {rank=same; front_end, extension, auth_api};
  }
  
  subgraph api_gateways {
      my_app_api -> {photos_ms, chats_ms, friends_ms};
  }
  
  subgraph microservices {
      photos_ms -> {database};
      chats_ms -> {database, cache};
      friends_ms -> {database, facebook_api};
  }
}
"""

GraphvizEx.new(data)

PlantUmlEx.new("""
@startuml

Title "This is an activity diagram"

Actor A
Database B

A -> B: send
@enduml
""")