module Git::Parsers::Diff::Patch::PatchMetadataParser

Source

# File lib/git/parsers/diff.rb, line 595
def apply_file_mode(type, mode)
  case type
  when 'new'
    @current_file[:dst_mode] = mode
    @current_file[:src_path] = nil
  when 'deleted'
    @current_file[:src_mode] = mode
    @current_file[:dst_path] = nil
  end
end

Applies source or destination mode updates based on file operation type

@param type [String] operation type (‘’new’‘ or `’deleted’‘)

@param mode [String] file mode from patch metadata

@return [void]

detect_type_change ()

Source

# File lib/git/parsers/diff.rb, line 577
def detect_type_change
  src_mode = @current_file[:src_mode]
  dst_mode = @current_file[:dst_mode]
  return unless src_mode && dst_mode

  # Type change occurs when the file type bits differ (e.g., 100644 vs 120000)
  # The first 3 digits represent the file type
  @current_file[:status] = :type_changed if src_mode[0, 3] != dst_mode[0, 3]
end

Marks the current entry as a type change when type bits differ

@return [void]

parse_metadata_line (line)

Source

# File lib/git/parsers/diff.rb, line 517
def parse_metadata_line(line)
  try_parse_index(line)
  try_parse_file_mode(line)
  try_parse_old_new_mode(line)
  try_parse_rename(line)
  try_parse_similarity(line)
  try_mark_binary(line)
end

Parses a metadata line for the current patch file

@param line [String] a metadata line from the patch block

@return [void]

try_mark_binary (line)

Source

# File lib/git/parsers/diff.rb, line 657
def try_mark_binary(line)
  @current_file[:binary] = true if line.match?(BINARY_PATTERN) || line.match?(GIT_BINARY_PATCH_PATTERN)
end

Marks the current file as binary when binary markers are present

@param line [String] a metadata line from the patch block

@return [Boolean, nil] true when binary metadata is detected

try_parse_file_mode (line)

Source

# File lib/git/parsers/diff.rb, line 549
def try_parse_file_mode(line)
  return unless (match = line.match(FILE_MODE_PATTERN))

  type, mode = match.captures
  @current_file[:status] = PATCH_STATUS_MAP.fetch(type, :modified)
  apply_file_mode(type, mode)
end

Parses file creation and deletion mode lines

@param line [String] a metadata line from the patch block

@return [void]

try_parse_index (line)

Source

# File lib/git/parsers/diff.rb, line 532
def try_parse_index(line)
  return unless (match = line.match(INDEX_PATTERN))

  @current_file[:src_sha] = match[1]
  @current_file[:dst_sha] = match[2]
  return unless (mode = match[3]&.strip)
  return unless @current_file[:src_mode].nil? && @current_file[:dst_mode].nil?

  @current_file[:src_mode] = @current_file[:dst_mode] = mode
end

Parses index metadata and updates mode defaults when present

@param line [String] a metadata line from the patch block

@return [void]

try_parse_old_new_mode (line)

Source

# File lib/git/parsers/diff.rb, line 563
def try_parse_old_new_mode(line)
  if (match = line.match(OLD_MODE_PATTERN))
    @current_file[:src_mode] = match[1]
    detect_type_change
  elsif (match = line.match(NEW_MODE_PATTERN))
    @current_file[:dst_mode] = match[1]
    detect_type_change
  end
end

Parses old/new mode lines and detects type changes

@param line [String] a metadata line from the patch block

@return [void]

try_parse_rename (line)

Source

# File lib/git/parsers/diff.rb, line 612
def try_parse_rename(line)
  try_parse_rename_or_copy(line, RENAME_FROM_PATTERN, RENAME_TO_PATTERN, :renamed) ||
    try_parse_rename_or_copy(line, COPY_FROM_PATTERN, COPY_TO_PATTERN, :copied)
end

Parses rename or copy metadata for the current patch file

@param line [String] a metadata line from the patch block

@return [Symbol, nil] parsed status when a rename or copy line matches

try_parse_rename_or_copy (line, from_pattern, to_pattern, status)

Source

# File lib/git/parsers/diff.rb, line 629
def try_parse_rename_or_copy(line, from_pattern, to_pattern, status)
  if (match = line.match(from_pattern))
    @current_file[:src_path] = Diff.unescape_path(match[1])
    @current_file[:status] = status
  elsif (match = line.match(to_pattern))
    @current_file[:dst_path] = Diff.unescape_path(match[1])
    @current_file[:status] = status
  end
end

Parses one side of rename or copy metadata

@param line [String] a metadata line from the patch block

@param from_pattern [Regexp] pattern for source path lines

@param to_pattern [Regexp] pattern for destination path lines

@param status [Symbol] status to set when a pattern matches

@return [Symbol, nil] the assigned status when matched

try_parse_similarity (line)

Source

# File lib/git/parsers/diff.rb, line 645
def try_parse_similarity(line)
  return unless (match = line.match(SIMILARITY_PATTERN))

  @current_file[:similarity] = match[1].to_i
end

Parses similarity index metadata

@param line [String] a metadata line from the patch block

@return [Integer, nil] parsed similarity percentage when matched