run.sh

#! /bin/bash

## source: https://stackoverflow.com/a/21189044
function parse_yaml {
   local prefix=$2
   local s='[[:space:]]*' w='[a-zA-Z0-9_]*' fs=$(echo @|tr @ '\034')
   sed -ne "s|^\($s\):|\1|" \
        -e "s|^\($s\)\($w\)$s:$s[\"']\(.*\)[\"']$s\$|\1$fs\2$fs\3|p" \
        -e "s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p"  $1 |
   awk -F$fs '{
      indent = length($1)/2;
      vname[indent] = $2;
      for (i in vname) {if (i > indent) {delete vname[i]}}
      if (length($3) > 0) {
         vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
         printf("%s%s%s=\"%s\"\n", "'$prefix'",vn, $2, $3);
      }
   }'
}


function debug_variables {
   # todo: test printenv/env and consider grepping by prefix
   # https://stackoverflow.com/questions/1305237/how-to-list-variables-declared-in-script-in-bash
   echo "cooling type: $cooling_type"
   echo "cooling pump speed: $cooling_pump_speed"
   echo "cooling fan speed: $cooling_fan_speed"
   echo "cooling color: $cooling_color"
   echo "controller type: $controller_type"
   echo "controller fan sync: $controller_fan_sync_speed"
   echo "controller fan 1: $controller_fan1_speed"
   echo "controller fan 2: $controller_fan2_speed"
   echo "controller fan 3: $controller_fan3_speed"
   echo "controller fan 4: $controller_fan4_speed"
   echo "controller fan 5: $controller_fan5_speed"
   echo "controller fan 6: $controller_fan6_speed"
}

## bandaid, improve with todo
function unset_optional_variables {
   echo "unsetting all variables"
   unset $cooling_type
   unset cooling_pump_speed
   unset cooling_fan_speed
   unset cooling_color
   unset controller_type
   unset controller_fan_sync_speed
   unset controller_fan1_speed
   unset controller_fan2_speed
   unset controller_fan3_speed
   unset controller_fan4_speed
   unset controller_fan5_speed
   unset controller_fan6_speed
}

function configure_liquidctl {
   liquidctl initialize all

   ### AIO cooling (optional now, but requires pump speed when used)   
   if [ ! -z "$cooling_type" ]; then
      liquidctl --match $cooling_type list

      echo "cooling pump: $cooling_pump_speed"
      liquidctl --match $cooling_type set pump speed $cooling_pump_speed

      if [ ! -z "$cooling_fan_speed" ]; then
         echo "cooling fan: $cooling_fan_speed"
         liquidctl --match $cooling_type set fan speed $cooling_fan_speed
      fi

      if [ ! -z "$cooling_color" ]; then
         echo "cooling color: $cooling_color"
         liquidctl --match $cooling_type $cooling_color
      fi
   fi

   ## controller (optional)
   if [ ! -z "$controller_type" ]; then
      liquidctl --match $controller_type list

      if [ ! -z "$controller_fan_sync_speed" ]; then         
         echo "controller sync fan: $controller_fan_sync_speed"
         liquidctl --match $controller_type set sync speed $controller_fan_sync_speed
      else 

         if [ ! -z "$controller_fan1_speed" ]; then
            echo "controller fan1: $controller_fan1_speed"
            liquidctl --match $controller_type set fan1 speed $controller_fan1_speed
         fi

         if [ ! -z "$controller_fan2_speed" ]; then
            echo "controller fan2: $controller_fan2_speed"
            liquidctl --match $controller_type set fan2 speed $controller_fan2_speed
         fi

         if [ ! -z "$controller_fan3_speed" ]; then
            echo "controller fan3: $controller_fan3_speed"
            liquidctl --match $controller_type set fan3 speed $controller_fan3_speed
         fi

         if [ ! -z "$controller_fan4_speed" ]; then
            echo "controller fan4: $controller_fan4_speed"
            liquidctl --match $controller_type set fan4 speed $controller_fan4_speed
         fi

         if [ ! -z "$controller_fan5_speed" ]; then
            echo "controller fan5: $controller_fan5_speed"
            liquidctl --match $controller_type set fan5 speed $controller_fan5_speed
         fi

         if [ ! -z "$controller_fan6_speed" ]; then
            echo "controller fan6: $controller_fan6_speed"
            liquidctl --match $controller_type set fan6 speed $controller_fan6_speed
         fi
      fi
   fi
}


eval $(parse_yaml /app/config.yaml)
if [ ! -z "$SCRIPT_DEBUG" ]; then
   echo "initial:"
   debug_variables
fi
configure_liquidctl

inotifywait -q -m -e close_write /app/config.yaml |
while read -r filename event; do
  echo "file changed"
   if [ ! -z "$SCRIPT_DEBUG" ]; then
      echo "cached:"
      debug_variables
   fi
   
  unset_optional_variables

   if [ ! -z "$SCRIPT_DEBUG" ]; then
      echo "cleared:"
      debug_variables
   fi

  eval $(parse_yaml /app/config.yaml)

   if [ ! -z "$SCRIPT_DEBUG" ]; then
      echo "reload:"
      debug_variables
   fi

  configure_liquidctl
done