Fixes an issue with the "Dynamix System Temperature" plugin, adding "bus" line to sensors.conf

fix_dynamix_temp

#!/bin/bash
#
# version 1.0
# latest version: https://gist.github.com/ljm42/d3132eab72661d0fd725f86f3ed13f65
#
# This is a user script that modifies the "Dynamix System Temperature" plugin version 2020.06.20
# so that it works on systems that require a "bus" line to be added to sensors.conf
#
# NOTE: Once the plugin itself has been updated to generate the "bus" line, you should uninstall this script
#
# To Install:
# * Install the "Dynamix System Temperature" plugin
# * Install the "User Scripts" plugin
# * Go to Settings -> Userscripts
#   * Add New Script with name "fix_dynamix_temp"
#   * Click on the cog/wheel next to "fix_dynamix_temp" and choose Edit Script
#   * Copy/paste this into the box, replacing whatever is there. Hit Save Changes
#   * Set the script to run "At First Array Start Only" and press Apply
#   * Press Run Script to run it now
# * Go to Settings -> System Temp
#   * Press Detect, then Save
#   * Press Rescan, configure your sensors and Apply. 
#     Note: You MUST hit apply, so if needed make a dummy change and change it back to enable the Apply button
#
# To Uninstall:
# * You should do this after upgrading to a version of the "Dynamix System Temperature" plugin that handles the "bus" line
# * Go to Settings -> Userscripts
#   * Click on the cog/wheel next to "fix_dynamix_temp" and choose Delete Script
# * Note: If you did not upgrade to a newer version of "Dynamix System Temperature" plugin 
#   but just want to undo this script, you need to reboot now to get back to the default plugin
# * Go to Settings -> System Temp
#   * Press Detect, then Save
#   * Now configure your sensors and Apply. This will remove any customizations from this user script.
#     Note: You MUST hit apply, so if needed make a dummy change and change it back to enable the Apply button
#
### BEGIN SCRIPT ###

# calculate the "bus" line for sensors.conf per man file: https://linux.die.net/man/5/sensors3.conf
# NOTE: if multiple exist this will only pick up the last one.
for FILE in /sys/class/i2c-adapter/i2c-*; do
  BUSNUM=${FILE##*/}
  ADAPTER=$(cat "${FILE}/name")
  LINE="bus \"${BUSNUM}\" \"${ADAPTER}\""
  # echo $LINE
done

# bail if we couldn't determine the bus
[[ -z "$LINE" ]] && echo "nothing to do, bus was not found" && exit 1

echo "bus found: ${LINE}"
echo "---"

# Ensure "Dynamix System Temperature" plugin version 2020.06.20 is installed
[[ ! -e "/boot/config/plugins/dynamix.system.temp.plg" ]] && echo "nothing to do, 'Dynamix System Temperature' plugin not installed" && exit 1
if ! ( grep -q '!ENTITY version   "2020.06.20"' "/boot/config/plugins/dynamix.system.temp.plg" ); then
 echo "This user script only works with the 2020.06.20 version of the 'Dynamix System Temperature' plugin"
 exit 1
fi

echo '"Dynamix System Temperature" plugin version 2020.06.20 found'
echo "---"

# Modify the "Dynamix System Temperature" plugin, customizing it for this particular system
# Once the plugin is modified, any new sesnsors.conf file it generates will include the "bus" line
#
PAGE="/usr/local/emhttp/plugins/dynamix.system.temp/TempSettings.page"
if [[ -f "$PAGE" ]]; then
  # dynamix.system.temp is installed
  if ! ( grep -q "${LINE}" ${PAGE} ); then
    # only modify this file once
    # add "bus" to script that generates sensors.conf
    echo "editing ${PAGE}"
    FINDLINE='\$content = "# sensors\\n"'
    NEWLINE='\$content .= "# bus added by fix_dynamix_temp user script\\n";\n'
    NEWLINE+="\$content .= '${LINE}'.\"\\\n\";"
    sed -i "/${FINDLINE}/a ${NEWLINE}" $PAGE 
  fi
  echo "${PAGE} contains:"
  grep -A 2 "# sensors" $PAGE
  echo "---"
fi

# If there is an existing sensors.conf file, modify it
# 
PAGE="/etc/sensors.d/sensors.conf"
if [[ -f "$PAGE" ]]; then
  # there is an existing sensors.conf file
  if ! ( grep -q "${LINE}" ${PAGE} ); then
    # only modify this file once
    # add "bus" to existing sensors.conf
    echo "editing ${PAGE}"
    FINDLINE='\# sensors'
    NEWLINE="# bus added directly by fix_dynamix_temp user script\n${LINE}"
    sed -i "/${FINDLINE}/a ${NEWLINE}" $PAGE 
  fi
  echo "${PAGE} contains:"
  grep -A 2 "# sensors" $PAGE
  echo "---"
fi

output=$(sensors -A 2>&1)

echo "sensors -A"
echo "${output}"
echo "---"

if [[ "${output}" =~ "Error" ]]; then
  echo "something still isn't right, investigate the error above" && exit 1
fi

echo "No errors detected, go to Settings -> System Temp and configure your settings"