module Gitlab module Conflict class File include Gitlab::Routing.url_helpers include IconsHelper class MissingResolution < StandardError end CONTEXT_LINES = 3 attr_reader :merge_file_result, :their_path, :our_path, :our_mode, :merge_request, :repository def initialize(merge_file_result, conflict, merge_request:) @merge_file_result = merge_file_result @their_path = conflict[:theirs][:path] @our_path = conflict[:ours][:path] @our_mode = conflict[:ours][:mode] @merge_request = merge_request @repository = merge_request.project.repository @match_line_headers = {} end # Array of Gitlab::Diff::Line objects def lines @lines ||= Gitlab::Conflict::Parser.new.parse(merge_file_result[:data], our_path: our_path, their_path: their_path, parent_file: self) end def resolve_lines(resolution) section_id = nil lines.map do |line| unless line.type section_id = nil next line end section_id ||= line_code(line) case resolution[section_id] when 'head' next unless line.type == 'new' when 'origin' next unless line.type == 'old' else raise MissingResolution, "Missing resolution for section ID: #{section_id}" end line end.compact end def highlight_lines! their_file = lines.reject { |line| line.type == 'new' }.map(&:text).join("\n") our_file = lines.reject { |line| line.type == 'old' }.map(&:text).join("\n") their_highlight = Gitlab::Highlight.highlight(their_path, their_file, repository: repository).lines our_highlight = Gitlab::Highlight.highlight(our_path, our_file, repository: repository).lines lines.each do |line| if line.type == 'old' line.rich_text = their_highlight[line.old_line - 1].try(:html_safe) else line.rich_text = our_highlight[line.new_line - 1].try(:html_safe) end end end def sections return @sections if @sections chunked_lines = lines.chunk { |line| line.type.nil? }.to_a match_line = nil sections_count = chunked_lines.size @sections = chunked_lines.flat_map.with_index do |(no_conflict, lines), i| section = nil # We need to reduce context sections to CONTEXT_LINES. Conflict sections are # always shown in full. if no_conflict conflict_before = i > 0 conflict_after = (sections_count - i) > 1 if conflict_before && conflict_after # Create a gap in a long context section. if lines.length > CONTEXT_LINES * 2 head_lines = lines.first(CONTEXT_LINES) tail_lines = lines.last(CONTEXT_LINES) # Ensure any existing match line has text for all lines up to the last # line of its context. update_match_line_text(match_line, head_lines.last) # Insert a new match line after the created gap. match_line = create_match_line(tail_lines.first) section = [ { conflict: false, lines: head_lines }, { conflict: false, lines: tail_lines.unshift(match_line) } ] end elsif conflict_after tail_lines = lines.last(CONTEXT_LINES) # Create a gap and insert a match line at the start. if lines.length > tail_lines.length match_line = create_match_line(tail_lines.first) tail_lines.unshift(match_line) end lines = tail_lines elsif conflict_before # We're at the end of the file (no conflicts after), so just remove extra # trailing lines. lines = lines.first(CONTEXT_LINES) end end # We want to update the match line's text every time unless we've already # created a gap and its corresponding match line. update_match_line_text(match_line, lines.last) unless section section ||= { conflict: !no_conflict, lines: lines } section[:id] = line_code(lines.first) unless no_conflict section end end def line_code(line) Gitlab::Diff::LineCode.generate(our_path, line.new_pos, line.old_pos) end def create_match_line(line) Gitlab::Diff::Line.new('', 'match', line.index, line.old_pos, line.new_pos) end # Any line beginning with a letter, an underscore, or a dollar can be used in a # match line header. Only context sections can contain match lines, as match lines # have to exist in both versions of the file. def find_match_line_header(index) return @match_line_headers[index] if @match_line_headers.key?(index) @match_line_headers[index] = begin if index >= 0 line = lines[index] if line.type.nil? && line.text.match(/\A[A-Za-z$_]/) " #{line.text}" else find_match_line_header(index - 1) end end end end # Set the match line's text for the current line. A match line takes its start # position and context header (where present) from itself, and its end position from # the line passed in. def update_match_line_text(match_line, line) return unless match_line header = find_match_line_header(match_line.index - 1) match_line.text = "@@ -#{match_line.old_pos},#{line.old_pos} +#{match_line.new_pos},#{line.new_pos} @@#{header}" end def as_json(opts = nil) { old_path: their_path, new_path: our_path, blob_icon: file_type_icon_class('file', our_mode, our_path), blob_path: namespace_project_blob_path(merge_request.project.namespace, merge_request.project, ::File.join(merge_request.diff_refs.head_sha, our_path)), sections: sections } end # Don't try to print merge_request or repository. def inspect instance_variables = [:merge_file_result, :their_path, :our_path, :our_mode].map do |instance_variable| value = instance_variable_get("@#{instance_variable}") "#{instance_variable}=\"#{value}\"" end "#<#{self.class} #{instance_variables.join(' ')}>" end end end end