Use a more recent Rubocop and fix offenses

Change-Id: I7474b4c43eeb4d161b66b859c6cb705f5eacb2ce

.rubocop.yml

@@ -4,8 +4,7 @@
 # - submit the change in the code_generator
 
 AllCops:
-  TargetRubyVersion: 2.4
-
+  TargetRubyVersion: 2.7
 
 # This requires to alphabetically sort Gem's requirements
 Bundler/OrderedGems:
@@ -17,7 +16,7 @@ Style/FrozenStringLiteralComment:
   Enabled: false
 
 ### Disable line length constraint
-Metrics/LineLength:
+Layout/LineLength:
   Max: 180
 # Because we're not in the 80s anymore.
 # Based on data from http://sideeffect.kr/popularconvention#ruby
@@ -45,7 +44,7 @@ Style/TrailingCommaInHashLiteral:
 #   }
 #
 ### Align hashes as a table
-Layout/AlignHash:
+Layout/HashAlignment:
   EnforcedColonStyle: table
   EnforcedHashRocketStyle: key
 # When dealing with long key names, it is easier to read hashes in colon
@@ -98,11 +97,6 @@ Style/FormatString:
 Style/MultilineBlockChain:
   Enabled: false
 
-# We ain't serving subseconds requests. Forcing to use tr instead of gsub will
-# be annoying without much value
-Performance/StringReplacement:
-  Enabled: false
-
 # We don't write documentation there at the moment
 Style/Documentation:
   Enabled: false

Gemfile

@@ -17,4 +17,4 @@ group :ec2 do
 end
 
 # Other gems should go after this comment
-gem 'rubocop', '=0.61.1'
+gem 'rubocop', '=1.29.1'

attributes/default.rb

@@ -1,4 +1,3 @@
-
 default['mariadb']['database']['name'] = 'librenms'
 default['mariadb']['user_librenms']['username'] = 'librenms'
 default['mariadb']['user_librenms']['password'] = 'default'
@@ -31,7 +30,7 @@
 default['librenms']['env']['DB_DATABASE'] = node['mariadb']['database']['name']
 default['librenms']['env']['DB_USERNAME'] = node['mariadb']['user_librenms']['username']
 default['librenms']['env']['DB_PASSWORD'] = node['mariadb']['user_librenms']['password']
-default['librenms']['env']['APP_URL'] = 'http://' + node['librenms']['web']['name'] + '/'
+default['librenms']['env']['APP_URL'] = "http://#{node['librenms']['web']['name']}/"
 
 # snmpd
 default['librenms']['snmp']['community'] = 'public'

metadata.rb

@@ -3,7 +3,7 @@
 maintainer_email '[email protected]'
 license          'Apache-2.0'
 description      'Installs/Configures librenms'
-long_description 'This cookbook installs and configure LibreNMS along with the required components (Apache and MySQL). LibreNMS is an autodiscovering PHP/MySQL-based network monitoring system.'
+long_description 'Installs and configures LibreNMS along with the required components (Apache and MySQL). LibreNMS is an autodiscovering PHP/MySQL-based network monitoring system.'
 issues_url       'https://github.com/criteo-cookbooks/librenms/issues'
 source_url       'https://github.com/criteo-cookbooks/librenms'
 version          '0.2.29'

recipes/default.rb

@@ -242,8 +242,8 @@
   # enforce right permissions
 
   facl dir do
-    group   :'' => 'rwx'
-    default :group => { :'' => 'rwx' }
+    group   '': 'rwx'
+    default group: { '': 'rwx' }
     recurse true
   end
 end