fix (FSUpdate): fixes FSUpdate version parsing issue

src/fabscan/lib/util/FSUpdate.py

@@ -17,13 +17,12 @@
 
 def get_build(version):
 
-    if semver.VersionInfo.isvalid(version):
+    if not semver.VersionInfo.isvalid(version):
         raise ValueError('%s is not valid SemVer string' % version)
 
-    verinfo = semver.VersionInfo.parse(version)
-
-    if verinfo['build']:
-        return verinfo['build']
+    verinfo = semver.parse_version_info(version)
+    if verinfo.build:
+        return verinfo.build
     else:
         return "0"
 
@@ -75,8 +74,9 @@ def get_latest_version_tag():
                                 # ignore invalid version number
                                 pass
                             break
-            return latest_version
+            return latest_version.strip()
         except (Exception, urllib.error.URLError) as e:
+            _logger.error(e)
             _logger.exception("Error while getting latest version tag: ")
             return __version__
 
@@ -114,7 +114,6 @@ def upgrade_is_available(current_version, online_lookup_ip):
 
     return is_upgradeable(latest_version, current_version), latest_version
 
-
 def do_upgrade():
     try:
         os.system('nohup bash -c "sudo apt-get update -y && sudo apt-get dist-upgrade -y --only-upgrade -o Dpkg::Options::=\"--force-confnew\" fabscanpi-server" >> /var/log/fabscanpi/upgrade.log')