Add Overcommit to prevent committing substandard code

.overcommit.yml

@@ -0,0 +1,33 @@
+# Use this file to configure the Overcommit hooks you wish to use. This will
+# extend the default configuration defined in:
+# https://github.com/sds/overcommit/blob/master/config/default.yml
+#
+# At the topmost level of this YAML file is a key representing type of hook
+# being run (e.g. pre-commit, commit-msg, etc.). Within each type you can
+# customize each hook, such as whether to only run it on certain files (via
+# `include`), whether to only display output if it fails (via `quiet`), etc.
+#
+# For a complete list of hooks, see:
+# https://github.com/sds/overcommit/tree/master/lib/overcommit/hook
+#
+# For a complete list of options that you can use to customize hooks, see:
+# https://github.com/sds/overcommit#configuration
+#
+# Uncomment the following lines to make the configuration take effect.
+
+PreCommit:
+  RuboCop:
+    enabled: true
+    on_warn: fail # Treat all warnings as failures
+
+  TrailingWhitespace:
+    enabled: true
+    exclude:
+      - '**/db/structure.sql' # Ignore trailing whitespace in generated files
+
+#PostCheckout:
+#  ALL: # Special hook name that customizes all hooks of this type
+#    quiet: true # Change all post-checkout hooks to only display output on failure
+#
+#  IndexTags:
+#    enabled: true # Generate a tags file with `ctags` each time HEAD changes

bin/setup

@@ -5,4 +5,10 @@ set -vx
 
 bundle install
 
-# Do any other automated setup that you need to do here
+if ! which overcommit >/dev/null; then
+  echo 'The gem overcommit is not installed. It is necessary to lint the git history through git hooks.'
+  echo 'Please install overcommit and run this script again.'
+  exit 1
+fi
+
+overcommit --install

nostr.gemspec

@@ -31,6 +31,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.add_development_dependency 'overcommit', '~> 0.59'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.12'
   spec.add_development_dependency 'rubocop', '~> 1.42'