Update BLZ data + add Ruby 3.4 support

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ jobs:
   validate:
     strategy:
       matrix:
-        ruby-version: ["2.7", "3.0", "3.1", "3.2"]
+        ruby-version: ["3.1", "3.2", "3.3", "3.4"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3

.rubocop.yml

@@ -1,54 +1,8 @@
 inherit_from: .rubocop_todo.yml
+
 inherit_gem:
   gc_ruboconfig: rubocop.yml
-require: rubocop-rails
 
 AllCops:
   TargetRubyVersion: 3.2
-
-# Limit lines to 90 characters.
-Layout/LineLength:
-  Max: 90
-
-Metrics/ClassLength:
-  Max: 400
-
-# Avoid single-line methods.
-Style/SingleLineMethods:
-  AllowIfMethodIsEmpty: true
-
-# Wants underscores in all large numbers. Pain in the ass for things like
-# unix timestamps.
-Style/NumericLiterals:
-  Enabled: false
-
-# Wants you to use the same argument names for every reduce. This seems kinda
-# naff compared to naming them semantically
-Style/SingleLineBlockParams:
-  Enabled: false
-
-Style/SignalException:
-  EnforcedStyle: 'only_raise'
-
-# Wants to exclude accents from comments
-Style/AsciiComments:
-  Enabled: false
-
-# Configuration parameters: CountComments.
-Metrics/MethodLength:
-  Max: 25
-
-# Configuration parameters: CountComments.
-Metrics/ModuleLength:
-  Max: 400
-
-Layout/DotPosition:
-  EnforcedStyle: 'trailing'
-
-# Wants to to lock to Ruby 2.4 as specified here but as this is a public gem
-# this is quite aggressive.
-Gemspec/RequiredRubyVersion:
-  Enabled: false
-
-Rails/Blank:
-  Enabled: false
+  NewCops: enable

.rubocop_todo.yml

@@ -1,77 +1,69 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2020-08-25 10:15:35 UTC using RuboCop version 0.89.1.
+# on 2025-01-23 15:25:02 UTC using RuboCop version 1.71.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 8
-# Configuration parameters: IgnoredMethods.
-Metrics/AbcSize:
-  Max: 25
-
-# Offense count: 2
-# Configuration parameters: IgnoredMethods.
-Metrics/CyclomaticComplexity:
-  Max: 8
+# Offense count: 1
+# Configuration parameters: Severity, Include.
+# Include: **/*.gemspec
+Gemspec/RequiredRubyVersion:
+  Exclude:
+    - 'ibandit.gemspec'
 
 # Offense count: 1
-# Configuration parameters: EnforcedStyleForLeadingUnderscores.
-# SupportedStylesForLeadingUnderscores: disallowed, required, optional
-Naming/MemoizedInstanceVariableName:
+# Configuration parameters: LengthThreshold.
+Metrics/CollectionLiteralLength:
   Exclude:
-    - 'lib/ibandit/sweden/bank_lookup.rb'
+    - 'lib/ibandit/german_details_converter.rb'
 
 # Offense count: 1
 # Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
-# AllowedNames: at, by, db, id, in, io, ip, of, on, os, pp, to
+# AllowedNames: as, at, by, cc, db, id, if, in, io, ip, of, on, os, pp, to
 Naming/MethodParameterName:
   Exclude:
     - 'lib/ibandit/german_details_converter.rb'
 
 # Offense count: 1
+# Configuration parameters: IgnoredMetadata.
 RSpec/DescribeClass:
   Exclude:
+    - '**/spec/features/**/*'
+    - '**/spec/requests/**/*'
+    - '**/spec/routing/**/*'
+    - '**/spec/system/**/*'
+    - '**/spec/views/**/*'
     - 'spec/ibandit/structure_spec.rb'
 
 # Offense count: 1
-# Configuration parameters: Max.
+# Configuration parameters: CountAsOne.
 RSpec/ExampleLength:
-  Exclude:
-    - 'spec/ibandit/iban_spec.rb'
+  Max: 6
 
 # Offense count: 1
 RSpec/ExpectInHook:
   Exclude:
     - 'spec/ibandit/german_details_converter_spec.rb'
 
-# Offense count: 12
+# Offense count: 15
 RSpec/MultipleExpectations:
   Max: 2
 
-# Offense count: 182
-# Configuration parameters: AllowSubject.
-RSpec/MultipleMemoizedHelpers:
-  Max: 7
-
-# Offense count: 20
-# Configuration parameters: IgnoreSharedExamples.
+# Offense count: 26
+# Configuration parameters: EnforcedStyle, IgnoreSharedExamples.
+# SupportedStyles: always, named_only
 RSpec/NamedSubject:
   Exclude:
     - 'spec/ibandit/iban_spec.rb'
 
-# Offense count: 368
+# Offense count: 177
+# Configuration parameters: AllowedGroups.
 RSpec/NestedGroups:
-  Max: 6
-
-# Offense count: 18
-RSpec/ScatteredSetup:
-  Exclude:
-    - 'spec/ibandit/iban_assembler_spec.rb'
-    - 'spec/ibandit/iban_spec.rb'
+  Max: 5
 
-# Offense count: 13
+# Offense count: 37
 RSpec/SubjectStub:
   Exclude:
     - 'spec/ibandit/iban_spec.rb'

.ruby-version

@@ -1 +1 @@
-3.2.2
+3.4.1

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## 1.22.0 - January 22, 2025
 
+- Remove support for Ruby < 3.1, add support for Ruby >= 3.4
+- Update BLZ2 data - BLZ_20241209
 - Update IBAN structures for `BE`, `ES`, `XK`.
 - Add partial support for `SO`, `NI`, `FK`, `OM`, `YE` IBANs.
 

Gemfile

@@ -3,3 +3,13 @@
 source 'https://rubygems.org'
 
 gemspec
+
+group :development, :test do
+  gem "gc_ruboconfig", "~> 5.0"
+  gem "nokogiri", "~> 1.6"
+  gem "pry", "~> 0.13"
+  gem "pry-byebug", "~> 3.10"
+  gem "rspec", "~> 3.12"
+  gem "rspec-its", "~> 1.2"
+  gem "sax-machine", "~> 1.3"
+end

bin/build_german_iban_rules.rb

@@ -1,42 +1,44 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Script for parsing the Bankleitzahl file (BLZ2.xml) from the Deutsche Bundesbank.
+require "yaml"
+require "sax-machine"
+
+class BLZRecord
+  include SAXMachine
+  element "BLZ", as: :bank_code
+  element "Merkmal", as: :primary_record
+  element "PruefZiffMeth", as: :check_digit_rule
+  element "IBANRegel", as: :iban_rule
+end
 
-# Script for parsing the Bankleitzahl file (BLZ2.txt) from the Deutsche
-# Bundesbank.
-require 'yaml'
-
-BLZ_FIELDS = {
-  bank_code:           { position: 0, length: 8 },
-  primary_record:      { position: 8, length: 1 },
-  check_digit_rule:    { position: 150, length: 2 },
-  iban_rule:           { position: 168, length: 6 }
-}.freeze
-
-def parse_line(line)
-  BLZ_FIELDS.each_with_object({}) do |(field, details), hash|
-    hash[field] = line.slice(details[:position], details[:length])
-  end
+class BLZFile
+  include SAXMachine
+  elements "BLZEintrag", as: :records, class: BLZRecord
 end
 
 def get_iban_rules(blz2_file)
-  blz2_file.each_with_object({}) do |line, hash|
-    bank_details = parse_line(line)
-
-    next if bank_details.delete(:primary_record) == '2'
+  BLZFile.parse(blz2_file).records.each_with_object({}) do |bank_details, hash|
+    next if bank_details.primary_record == "2"
 
-    hash[bank_details.delete(:bank_code)] = bank_details
+    hash[bank_details.bank_code] = {
+      check_digit_rule: bank_details.check_digit_rule,
+      iban_rule: bank_details.iban_rule,
+    }
   end
 end
 
 # Only parse the files if this file is run as an executable (not required in,
 # as it is in the specs)
 if __FILE__ == $PROGRAM_NAME
-  blz2_file = File.open(File.expand_path('../../data/raw/BLZ2.txt', __FILE__))
+  blz2_file = File.read(File.expand_path("../data/raw/BLZ2.xml", __dir__))
   iban_rules = get_iban_rules(blz2_file)
 
   output_file_path = File.expand_path(
-    '../../data/german_iban_rules.yml',
-    __FILE__
+    "../data/german_iban_rules.yml",
+    __dir__,
   )
 
-  File.open(output_file_path, 'w') { |f| f.write(iban_rules.to_yaml) }
+  File.open(output_file_path, "w") { |f| f.write(iban_rules.to_yaml) }
 end