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45 lines
1.1 KiB
Ruby
45 lines
1.1 KiB
Ruby
# for read Fluent::TextParser::TEMPLATE_REGISTRY
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require "fluent/registry"
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require "fluent/configurable"
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require "fluent/parser"
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class RegexpPreview
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attr_reader :file, :format, :time_format, :regexp
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def initialize(file, format, options = {})
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@file = file
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@format = format
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case format
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when "regexp"
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@regexp = Regexp.new(options[:regexp])
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else
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definition = Fluent::TextParser::TEMPLATE_REGISTRY.lookup(format)
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raise "Unknown format '#{format}'" unless definition
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@regexp = definition.patterns["format"]
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@time_format = options[:time_format] || definition.patterns["format"]
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end
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end
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def matches
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reader = FileReverseReader.new(File.open(file))
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matches = reader.tail.map do |line|
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result = {
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:whole => line,
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:matches => [],
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}
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m = line.match(regexp)
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next result unless m
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m.names.each_with_index do |name, index|
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result[:matches] << {
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key: name,
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matched: m[name],
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pos: m.offset(index + 1),
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}
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end
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result
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end
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matches
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end
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end
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