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@startuml
  |initialize|
  start
  :scenario manager setup;
  note right
    * guess scenario dir
    * detect last used scenario
  end note
  #LightGrey:--list-scenarios>
  :get config file;
  note right
    One of the following in this order
    # **CONFIG_FILE**
    # **--scenario** or **-S** in installer arguments
    # previous scenarios
    # any available scenario if there is *just one*
    # select scenario if installer is in interactive mode
  end note

  if (no config file?)
    stop
  endif

  :load configuration;
  note right
    * load configuration
    * merge defaults
    * save configuration
    * load answer file
    * setup kafo dirs
    * setup hooks
    * setup key-value store
  end note

  #greenyellow:**pre_migrations**|
  note right: here the 6.1 configs get turned into 6.2 scenarios

  :load configuration;
  note right: if migrations requested reload

  :execute scenario migrations;

  #LightGrey:--migrations-only>
  :load configuration;
  note right: if any migration was applied

  if (previous scenario != current scenario) then (scenario\nchanged)
    #LightGrey:--compare-scenarios>
    :load previous scenario;
    :run scenario migrations
     on previous scenario;
    :migrate data from previous scenario
    configuration to the current one;
    :load configuration;
  endif

  :clamp init;

  #Greenyellow:**boot**|

  :define installer options;
  :pre-parse ARGV to finish installer configuration;

  #Greenyellow:**init**|

  :load defaults from puppet;
  #Greenyellow:**pre_values**|
  :load values from answer file;
  :load values from previous answer file;
  note right: if previous scenraio != current scenario

  :update help with default values;
  |execute|
  :parse values from CLI arguments;

  :init progress bar;

  #LightBlue:**run system checks**>
  #Greenyellow:**pre_validations**|

  if (interactive?) then (yes)
    :run wizard;
  else
    :run validations;
  endif

  #Greenyellow:**pre_commit**|

  :save answers;
  note right: unless noop or dont-save-answers
  :save current scenario as the last used one;
  note right: unless noop or dont-save-answers

  #Greenyellow:**pre**|

  :setup HieraConfigurer and save configs;

  #Gold:run puppet;
  repeat
    :parse puppet output;
    :update installer logs;
    :update progress bar;
  repeat while (puppet runs?)

  #Greenyellow:**post**|

  stop
@enduml