Add check for performance governor in available governors

Author: AdnanHodzic

auto_cpufreq/core.py

@@ -371,10 +371,14 @@ def deploy_daemon():
 
 
 def deploy_daemon_performance():
-    print("\n" + "-" * 21 + " Deploying auto-cpufreq as a daemon " + "-" * 22 + "\n")
-
-    # ToDo:
-    # add check that performance exists otherwise exit
+    print("\n" + "-" * 21 + " Deploying auto-cpufreq as a daemon (performance) " + "-" * 22 + "\n")
+
+    # check that performance is in scaling_available_governors
+    with open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors") as available_governors:
+        if "performance" not in available_governors.read():
+            print("\"perfomance\" governor is unavailable on this system, run:\n"
+                    "sudo sudo auto-cpufreq --install\n\n"
+                    "to install auto-cpufreq using default \"balanced\" governor.\n")
 
     # deploy cpufreqctl script func call
     cpufreqctl()

bin/auto-cpufreq

@@ -177,10 +177,9 @@ def main(config, daemon, debug, install, install_performance, live, log, monitor
         elif install_performance:
             if os.getenv("PKG_MARKER") == "SNAP":
                 root_check()
-                print("This option is only available on non Snap installs"
-                    "Please refer to: power_helper.py script for more info\n")
+                print("This option is only available on non Snap installs\n"
+                    "Please refer to auto-cpufreq power_helper.py script for more info\n")
             else:
-                print("in performance")
                 root_check()
                 running_daemon()
                 gov_check()
@@ -198,7 +197,6 @@ def main(config, daemon, debug, install, install_performance, live, log, monitor
                 run("snapctl start --enable auto-cpufreq", shell=True)
                 deploy_complete_msg()
             else:
-                print("in install")
                 root_check()
                 running_daemon()
                 gov_check()