58 lines
1.6 KiB
Ruby
58 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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# Converts git diff --word-diff=porcelain output to Gitlab::Diff::Line objects
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# see: https://git-scm.com/docs/git-diff#Documentation/git-diff.txt-porcelain
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module Gitlab
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module WordDiff
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class Parser
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include Enumerable
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def parse(lines, diff_file: nil)
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return [] if lines.blank?
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# By returning an Enumerator we make it possible to search for a single line (with #find)
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# without having to instantiate all the others that come after it.
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Enumerator.new do |yielder|
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@chunks = ChunkCollection.new
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@counter = PositionsCounter.new
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lines.each do |line|
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segment = LineProcessor.new(line).extract
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case segment
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when Segments::DiffHunk
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next if segment.first_line?
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counter.set_pos_num(old: segment.pos_old, new: segment.pos_new)
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yielder << build_line(segment.to_s, 'match', parent_file: diff_file)
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when Segments::Chunk
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@chunks.add(segment)
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when Segments::Newline
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yielder << build_line(@chunks.content, nil, parent_file: diff_file).tap { |line| line.set_marker_ranges(@chunks.marker_ranges) }
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@chunks.reset
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counter.increase_pos_num
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end
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end
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end
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end
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private
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attr_reader :counter
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def build_line(content, type, options = {})
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Gitlab::Diff::Line.new(
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content, type,
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counter.line_obj_index, counter.pos_old, counter.pos_new,
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**options).tap do
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counter.increase_obj_index
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end
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end
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end
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end
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end
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