snapcraft file refinement

snap/snapcraft.yaml

@@ -1,6 +1,6 @@
 name: auto-cpufreq
 base: core18
-version: '1.0' # just for humans, typically '1.2+git' or '1.3.2'
+version: '1.0'
 summary: Automatic CPU speed & power optimizer for Linux
 description: |
   Automatic CPU speed & power optimizer for Linux based on active
@@ -8,12 +8,11 @@ description: |
   Ultimately allowing you to improve battery life without making
   any compromises.
 
-grade: devel # must be 'stable' to release into candidate/stable channels
-confinement: devmode # use 'strict' once you have the right plugs and slots
+grade: stable
+confinement: classic
 
 parts:
   auto-cpufreq:
-    # See 'snapcraft plugins'
     plugin: python
     python-version: python3
     source: .
@@ -37,5 +36,4 @@ apps:
       LC_ALL: C.UTF-8
       LANG: C.UTF-8
       PKG_MARKER: SNAP
-    daemon: simple
-    
+    daemon: simple

source/core.py

@@ -321,7 +321,7 @@ def sysinfo():
 
     # get distro information in snap env.
     if os.getenv("PKG_MARKER") == "SNAP":
-        searchfile = open("/var/lib/snapd/hostfs/etc/os-release", "r")
+        searchfile = open("/usr/lib/os-release", "r")
         for line in searchfile:
             if line.startswith('NAME='):
                 distro = line[5:line.find('$')].strip("\"")