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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
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