reitzig/texlogparser

# frozen_string_literal: true
 
class TexLogParser
  # Matches messages of this form:
  #
  #     Package tocbasic Info: omitting babel extension for `toc'
  #     (tocbasic)             because of feature `nobabel' available
  #     (tocbasic)             for `toc' on input line 132.
  #
  # **Note:** Fails to pick up the fill message if lines get broken badly, e.g. in `000_pdf_fl.log:634`.
  class PrefixedMultiLinePattern
    include LogParser::RegExpPattern
 
    # Creates a new instance.
    def initialize
      super(/(Package|Class|\w+TeX)\s+(?:(\w+)\s+)?(Warning|Error|Info|Message)/,
            { pattern: ->(m) { /^\s*\(#{m[2]}\)/ }, # BROKEN_BY_LINEBREAKS
              until: :mismatch,
              inclusive: false })
    end
 
    # (see LogParser::RegExpPattern#read)
Assignment Branch Condition size for read is too high. [19.87/15]
    def read(lines)
      # @type [Message] msg
      # @type [Int] consumed
      msg, consumed = super(lines)
 
      case @start_match[3]
      when 'Error'
        msg.level = :error
      when 'Warning'
        msg.level = :warning
      when 'Info', 'Message'
        msg.level = :info
      else
        # TODO: abort?
        Logger.debug 'Unhandled message type!'
      end
 
      # source file from scope, parser does it
 
      # BROKEN_BY_LINEBREAKS
      # TODO: may be split across lines --> remove whitespace before extracting
      suffix_match = /on input line\s+(\d+)(?:\.\s*)?\z/.match(msg.message)
      unless suffix_match.nil?
        line = suffix_match[1].to_i
        msg.source_lines = { from: line, to: line }
      end
 
      # Remove uninformative line prefixes (e.g. `(tocbasic)`)
Favor modifier `unless` usage when having a single-line body. Another good alternative is the usage of control flow `&&`/`||`.
      unless @start_match[2].nil?
        msg.message.gsub!(@ending[:pattern][@start_match], ' ' * (@start_match[2].length + 2))
      end
 
      [msg, consumed]
    end
  end
end