Improved power_helper snap package detection

Author: AdnanHodzic

README.md

@@ -86,7 +86,7 @@ This can be done by running: `sudo python3 power_helper.py --gnome_power_disable
 
 After auto-cpufreq git repo has been cloned (`git clone https://github.com/AdnanHodzic/auto-cpufreq.git`), navagiate to directory where `power_helper.py` script resides by running: `cd auto-cpufreq/auto_cpufreq`
 
-After this step, all necessary changes will still be made automatically. However, if you wish to perform additonal "manual" settings this can be done by following instrucitons explained in next step.
+After this step, all necessary changes will still be made automatically. However, if you wish to perform additonal "manual" settings this can be done by following instructions explained in next step.
 
 ### 2: auto-cpufreq config file
 

auto_cpufreq/power_helper.py

@@ -33,6 +33,8 @@ def does_command_exists(cmd):
 bluetoothctl_exists = does_command_exists("bluetoothctl")
 tlp_stat_exists = does_command_exists("tlp-stat")
 powerprofilesctl_exists = does_command_exists("powerprofilesctl")
+snap_check = os.system("snap list | grep auto-cpufreq >/dev/null 2>&1")
+
 
 # detect if gnome power profile service is running
 if os.getenv("PKG_MARKER") != "SNAP":
@@ -281,7 +283,8 @@ def gnome_power_svc_disable_ext(ctx, power_selection):
     if systemctl_exists:
         # 0 is active
         if gnome_power_status != 0:
-            if os.getenv("PKG_MARKER") == "SNAP":
+            # 0 is success (snap package is installed)
+            if snap_check == 0:
                 print("Power Profiles Daemon is already disabled, re-enable by running:\n"
                         "sudo python3 power_helper.py --gnome_power_enable\n"
                         "\nfollowed by running:\n"
@@ -296,7 +299,8 @@ def gnome_power_svc_disable_ext(ctx, power_selection):
 
         # set balanced profile if its running before disabling it
         if gnome_power_status == 0 and powerprofilesctl_exists:
-            if os.getenv("PKG_MARKER") == "SNAP":
+            # 0 is success (snap package is installed)
+            if snap_check == 0:
                 print("Using profile: ", gnome_power_disable)
                 call(["powerprofilesctl", "set", gnome_power_disable])