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Contents
# coding: utf-8
module I18n::Tasks::KeyPatternMatching
extend self
MATCH_NOTHING = /\z\A/
# one regex to match any
def compile_patterns_re(key_patterns)
if key_patterns.blank?
# match nothing
MATCH_NOTHING
else
/(?:#{ key_patterns.map { |p| compile_key_pattern p } * '|' })/m
end
end
# convert pattern to regex
# In patterns:
# * is like .* in regexs
# : matches a single key
# {a, b.c} match any in set, can use : and *, match is captured
def compile_key_pattern(key_pattern)
return key_pattern if key_pattern.is_a?(Regexp)
/\A#{key_pattern_re_body(key_pattern)}\z/
end
def key_pattern_re_body(key_pattern)
key_pattern.
gsub(/\./, '\.').
gsub(/\*/, '.*').
gsub(/:/, '(?<=^|\.)[^.]+?(?=\.|$)').
gsub(/\{(.*?)}/) { "(#{$1.strip.gsub /\s*,\s*/, '|'})" }
end
def key_match_pattern(k)
@key_match_pattern ||= {}
@key_match_pattern[k] ||= begin
"#{k.gsub(KEY_INTERPOLATION_RE, ':')}#{':' if k.end_with?('.')}"
end
end
# @return true if the key looks like an expression
KEY_INTERPOLATION_RE = /(?:\#{.*?}|\*+|\:+)/.freeze
def key_expression?(k)
@key_is_expr ||= {}
if @key_is_expr[k].nil?
@key_is_expr[k] = (k =~ KEY_INTERPOLATION_RE || k.end_with?('.'))
end
@key_is_expr[k]
end
end
Version data entries
17 entries across 17 versions & 1 rubygems