.rubocop.yml
# Commonly used screens these days easily fit more than 80 characters.
Metrics/LineLength:
Max: 120
# Too short methods lead to extraction of single-use methods, which can make
# the code easier to read (by naming things), but can also clutter the class
Metrics/MethodLength:
Max: 20
# The guiding principle of classes is SRP, SRP can't be accurately measured by LoC
Metrics/ClassLength:
Max: 1500
# No space makes the method definition shorter and differentiates
# from a regular assignment.
Style/SpaceAroundEqualsInParameterDefault:
EnforcedStyle: no_space
# We do not need to support Ruby 1.9, so this is good to use.
Style/SymbolArray:
Enabled: true
# Mixing the styles looks just silly.
Style/HashSyntax:
EnforcedStyle: ruby19_no_mixed_keys
# String#% is by far the least verbose and only object oriented variant.
Style/FormatString:
EnforcedStyle: percent
Style/CollectionMethods:
Enabled: true
PreferredMethods:
# inject seems more common in the community.
reduce: "inject"
# Either allow this style or don't. Marking it as safe with parenthesis
# is silly. Let's try to live without them for now.
Style/ParenthesesAroundCondition:
AllowSafeAssignment: false
Lint/AssignmentInCondition:
AllowSafeAssignment: false
# Fail is an alias of raise. Avoid aliases, it's more cognitive load for no gain.
# The argument that fail should be used to abort the program is wrong too,
# there's Kernel#abort for that.
Style/SignalException:
EnforcedStyle: only_raise
Style/SpaceInsideBlockBraces:
# The space here provides no real gain in readability while consuming
# horizontal space that could be used for a better parameter name.
# Also {| differentiates better from a hash than { | does.
SpaceBeforeBlockParameters: false
# No trailing space differentiates better from the block:
# foo} means hash, foo } means block.
Style/SpaceInsideHashLiteralBraces:
EnforcedStyle: no_space
# do / end blocks should be used for side effects,
# methods that run a block for side effects and have
# a useful return value are rare, assign the return
# value to a local variable for those cases.
Style/MethodCalledOnDoEndBlock:
Enabled: true