fix: snaps read index error

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [0.4.2]
+### Fixes:
+- [Snaps read index error](https://github.com/vinifmor/fpakman/issues/30)
+
 ## [0.4.1] - 2019-07-25
 ### Improvements
 - retrieving some Snaps data (icon, description and confinement) through Ubuntu API instead of Snap Store

fpakman/__init__.py

@@ -1,4 +1,4 @@
-__version__ = '0.4.1'
+__version__ = '0.4.2'
 __app_name__ = 'fpakman'
 
 import os

fpakman/core/snap/snap.py

@@ -39,8 +39,8 @@ def app_str_to_json(app: str) -> dict:
         'version': app_data[1],
         'rev': app_data[2],
         'tracking': app_data[3],
-        'publisher': app_data[4],
-        'notes': app_data[5]
+        'publisher': app_data[4] if len(app_data) >= 5 else None,
+        'notes': app_data[5] if len(app_data) >= 6 else None
     }
 
     app_json.update(get_info(app_json['name'], ('summary', 'type', 'description')))