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# frozen_string_literal: true
# Script to generate the Error class name map in:
# lib/yard/handlers/c/base.rb
require 'open-uri'
require 'stringio'
desc 'Update the error class names map'
task :update_error_map do
ERROR_C_URL = 'https://raw.githubusercontent.com/ruby/ruby/master/error.c'
INIT_MATCH = /void\s+Init_Exception\(void\)\s*\{(.+?)^\}/m
NAME_MATCH = /(\w+)\s*=\s*rb_define_class\("([^"]+)"/
$stderr.puts "Downloading #{ERROR_C_URL} ..."
content = open(ERROR_C_URL) { |io| io.read }
$stderr.puts "Extracting class names ..."
init_source = content.match(INIT_MATCH).captures.first
map = init_source.scan(NAME_MATCH).sort_by { |key, value| key }
$stderr.puts "Generating new lookup table ..."
indent = ' ' * 4
source = StringIO.new
source.puts "#{indent}ERROR_CLASS_NAMES = {"
map.each do |variable, name|
source.puts "#{indent} '#{variable}' => '#{name}',"
end
source.puts "#{indent}}"
$stderr.puts source.string
$stderr.puts "Patching 'lib/yard/handlers/c/base.rb' ..."
CLASS_NAME_MAP_MATCH = /^\s+ERROR_CLASS_NAMES = {[^}]+}/
PROJECT_PATH = File.expand_path('..', __dir__)
C_BASE_HANDLER = File.join(PROJECT_PATH, 'lib/yard/handlers/c/base.rb')
File.open(C_BASE_HANDLER, 'r+') { |file|
content = file.read
# .rstrip is added to avoid adding new empty lines due to the new lines
# added by `.puts` when building the string.
content.gsub!(CLASS_NAME_MAP_MATCH, source.string.rstrip)
file.rewind
file.truncate(0)
file.write(content)
}
$stderr.puts "Done!"
end
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