_SplitLicense _splitLicense()

in tools/licenses/lib/licenses.dart [583:645]

• 62 lines of code
• 34 McCabe index (conditional complexity)

_SplitLicense _splitLicense(String body, { bool verifyResults = true }) {
  final Iterator<_LineRange> lines = _walkLinesForwards(body).iterator;
  if (!lines.moveNext())
    throw 'tried to split empty license';
  int end = 0;
  while (true) {
    final String line = lines.current.value;
    if (line == 'Author:' ||
        line == 'This code is derived from software contributed to Berkeley by' ||
        line == 'The Initial Developer of the Original Code is') {
      if (!lines.moveNext())
        throw 'unexpected end of block instead of author when looking for copyright';
      if (lines.current.value.trim() == '')
        throw 'unexpectedly blank line instead of author when looking for copyright';
      end = lines.current.end;
      if (!lines.moveNext())
        break;
    } else if (line.startsWith('Authors:') || line == 'Other contributors:') {
      if (line != 'Authors:') {
        // assume this line contained an author as well
        end = lines.current.end;
      }
      if (!lines.moveNext())
        throw 'unexpected end of license when reading list of authors while looking for copyright';
      final String firstAuthor = lines.current.value;
      int subindex = 0;
      while (subindex < firstAuthor.length && (firstAuthor[subindex] == ' ' ||
                                               firstAuthor[subindex] == '\t'))
        subindex += 1;
      if (subindex == 0 || subindex > firstAuthor.length)
        throw 'unexpected blank line instead of authors found when looking for copyright';
      end = lines.current.end;
      final String prefix = firstAuthor.substring(0, subindex);
      while (lines.moveNext() && lines.current.value.startsWith(prefix)) {
        final String nextAuthor = lines.current.value.substring(prefix.length);
        if (nextAuthor == '' || nextAuthor[0] == ' ' || nextAuthor[0] == '\t')
          throw 'unexpectedly ragged author list when looking for copyright';
        end = lines.current.end;
      }
      if (lines.current == null)
        break;
    } else if (line.contains(halfCopyrightPattern)) {
      do {
        if (!lines.moveNext())
          throw 'unexpected end of block instead of copyright holder when looking for copyright';
        if (lines.current.value.trim() == '')
          throw 'unexpectedly blank line instead of copyright holder when looking for copyright';
        end = lines.current.end;
      } while (lines.current.value.contains(trailingComma));
      if (!lines.moveNext())
        break;
    } else if (copyrightStatementPatterns.every((RegExp pattern) => !line.contains(pattern))) {
      break;
    } else {
      end = lines.current.end;
      if (!lines.moveNext())
        break;
    }
  }
  if (verifyResults && 'Copyright ('.allMatches(body, end).isNotEmpty && !body.startsWith('If you modify libpng'))
    throw 'the license seems to contain a copyright:\n===copyright===\n${body.substring(0, end)}\n===license===\n${body.substring(end)}\n=========';
  return _SplitLicense(body, end);
}