Fix engine detection on old Qwant iOS versions. #1541

	name: Validate regular Expressions

	on:
	pull_request:
	push:
	branches: [ master ]

	permissions:
	contents: read

	jobs:
	regex:
	name: Validate regular expressions
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Ruby
	uses: ruby/[email protected]
	with:
	ruby-version: '3.1'
	bundler-cache: true
	- name: Validate regular expressions
	run: \|
	cat <<- EOF > validate-regular-expressions.rb
	require "yaml"

	RegexSyntaxError = Class.new(StandardError)

	module Warning
	extend self

	def warn(message)
	raise RegexSyntaxError, message.gsub(/\A.+\.rb:\d+: warning: /, '').gsub(/\n$/, "")
	end
	end

	def find_regexes(object)
	result = []
	object.each { \|key, value\|
	if key == "regex"
	result.push(value)
	else
	if key.is_a?(Hash) \|\| key.is_a?(Array)
	result.push(*find_regexes(key))
	end
	if value.is_a?(Hash) \|\| value.is_a?(Array)
	result.push(*find_regexes(value))
	end
	end
	}
	return result
	end

	success = true

	Dir["regexes/*/.yml"].each do \|file\|
	data = YAML.load_file(file)

	print "Checking file #{file}... "

	warnings = []
	regexes = 0

	find_regexes(data).each do \|regex_string\|
	regexes += 1
	Regexp.new(regex_string, Regexp::IGNORECASE)
	rescue RegexSyntaxError => e
	success = false
	warnings << "'#{regex_string}', warning: #{e.message}"
	end

	if warnings.any?
	print "err\n\n"
	warnings.each { puts " " + _1 }
	puts "\n"
	else
	print "found #{regexes} regular expressions, all ok\n"
	end
	rescue
	print "could not find regular expressions\n"
	end

	success \|\| exit(1)
	EOF

	ruby validate-regular-expressions.rb

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