89 lines
2.5 KiB
Ruby
89 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Git
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module Conflict
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class Parser
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UnresolvableError = Class.new(StandardError)
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UnmergeableFile = Class.new(UnresolvableError)
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# Recoverable errors - the conflict can be resolved in an editor, but not with
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# sections.
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ParserError = Class.new(StandardError)
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UnexpectedDelimiter = Class.new(ParserError)
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MissingEndDelimiter = Class.new(ParserError)
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class << self
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def parse(text, our_path:, their_path:, parent_file: nil)
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validate_text!(text)
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line_obj_index = 0
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line_old = 1
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line_new = 1
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type = nil
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lines = []
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conflict_start = "<<<<<<< #{our_path}"
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conflict_middle = '======='
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conflict_end = ">>>>>>> #{their_path}"
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text.each_line.map do |line|
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full_line = line.delete("\n")
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if full_line == conflict_start
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validate_delimiter!(type.nil?)
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type = 'new'
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elsif full_line == conflict_middle
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validate_delimiter!(type == 'new')
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type = 'old'
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elsif full_line == conflict_end
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validate_delimiter!(type == 'old')
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type = nil
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elsif line[0] == '\\'
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type = 'nonewline'
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lines << {
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full_line: full_line,
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type: type,
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line_obj_index: line_obj_index,
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line_old: line_old,
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line_new: line_new
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}
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else
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lines << {
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full_line: full_line,
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type: type,
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line_obj_index: line_obj_index,
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line_old: line_old,
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line_new: line_new
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}
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line_old += 1 if type != 'new'
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line_new += 1 if type != 'old'
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line_obj_index += 1
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end
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end
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raise MissingEndDelimiter unless type.nil?
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lines
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end
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private
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def validate_text!(text)
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raise UnmergeableFile if text.blank? # Typically a binary file
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raise UnmergeableFile if text.length > 200.kilobytes
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end
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def validate_delimiter!(condition)
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raise UnexpectedDelimiter unless condition
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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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end
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