added coretemp.sh to i3block_shell scripts collection

README.md

@@ -29,6 +29,7 @@ None standard Python dependencies:
 
 ## i3block_shell
 A bunch of simple bash scripts to be called via i3blocks.
+* **coretemp.sh** Echos average temperature of all CPU cores by parsing output of `sensors` from package *lm_sensors*
 * **date.sh**: Echos the current date
     * on left click: uses notify-send to print current three month calendar
 * **df.sh**: Echos current diskfree level of the root partition

i3block_shell/coretemp.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# print temp for i3 blocks
+# reads output from sensors command
+
+all_sensors=$(sensors | grep -E "Core [0-9]" | awk '{print $3}' \
+    | cut -d'.' -f 1 | sed 's/+//g')
+
+# build array
+sensors_arr=()
+while IFS= read -r line; do
+    sensors_arr+=("$line")
+done <<< "$all_sensors"
+
+# calc average
+cores="${#sensors_arr[@]}"
+sum_cores=$(IFS=+; echo "$((${sensors_arr[*]}))")
+temp=$(( sum_cores / cores ))
+
+# split based on temp
+if [[ $temp -le 60 ]]; then
+    printmain="  $temp°C"
+    printsmall=""
+    printcolor=""
+elif [[ $temp -gt 60 ]] && [[ $temp -lt 75 ]]; then
+    printmain="  $temp°C"
+    printsmall=""
+    printcolor="#FFFF00"
+elif [[ $temp -ge 75 ]]; then
+    printmain="  $temp°C"
+    printsmall=""
+    printcolor="#FF0000"
+else
+    printcolor=""
+fi
+
+echo "$printmain"
+echo "$printsmall"
+echo "$printcolor"
+
+##
+exit 0