A appendOptions()

in src/main/java/org/apache/commons/cli/HelpFormatter.java [417:488]
64 lines of code
20 McCabe index (conditional complexity)

    <A extends Appendable> A appendOptions(final A sb, final int width, final Options options, final int leftPad, final int descPad) throws IOException {
        final String lpad = createPadding(leftPad);
        final String dpad = createPadding(descPad);
        // first create list containing only <lpad>-a,--aaa where
        // -a is opt and --aaa is long opt; in parallel look for
        // the longest opt string this list will be then used to
        // sort options ascending
        int max = 0;
        final int maxSince = showSince ? determineMaxSinceLength(options) + leftPad : 0;
        final List<StringBuilder> prefixList = new ArrayList<>();
        final List<Option> optList = options.helpOptions();
        if (getOptionComparator() != null) {
            Collections.sort(optList, getOptionComparator());
        }
        for (final Option option : optList) {
            final StringBuilder optBuf = new StringBuilder();
            if (option.getOpt() == null) {
                optBuf.append(lpad).append("   ").append(getLongOptPrefix()).append(option.getLongOpt());
            } else {
                optBuf.append(lpad).append(getOptPrefix()).append(option.getOpt());
                if (option.hasLongOpt()) {
                    optBuf.append(',').append(getLongOptPrefix()).append(option.getLongOpt());
                }
            }
            if (option.hasArg()) {
                final String argName = option.getArgName();
                if (argName != null && argName.isEmpty()) {
                    // if the option has a blank argname
                    optBuf.append(' ');
                } else {
                    optBuf.append(option.hasLongOpt() ? longOptSeparator : " ");
                    optBuf.append("<").append(argName != null ? option.getArgName() : getArgName()).append(">");
                }
            }

            prefixList.add(optBuf);
            max = Math.max(optBuf.length() + maxSince, max);
        }
        final int nextLineTabStop = max + descPad;
        if (showSince) {
            final StringBuilder optHeader = new StringBuilder(HEADER_OPTIONS).append(createPadding(max - maxSince - HEADER_OPTIONS.length() + leftPad))
                    .append(HEADER_SINCE);
            optHeader.append(createPadding(max - optHeader.length())).append(lpad).append(HEADER_DESCRIPTION);
            appendWrappedText(sb, width, nextLineTabStop, optHeader.toString());
            sb.append(getNewLine());
        }

        int x = 0;
        for (final Iterator<Option> it = optList.iterator(); it.hasNext();) {
            final Option option = it.next();
            final StringBuilder optBuf = new StringBuilder(prefixList.get(x++).toString());
            if (optBuf.length() < max) {
                optBuf.append(createPadding(max - maxSince - optBuf.length()));
                if (showSince) {
                    optBuf.append(lpad).append(option.getSince() == null ? "-" : option.getSince());
                }
                optBuf.append(createPadding(max - optBuf.length()));
            }
            optBuf.append(dpad);

            if (deprecatedFormatFunction != null && option.isDeprecated()) {
                optBuf.append(deprecatedFormatFunction.apply(option).trim());
            } else if (option.getDescription() != null) {
                optBuf.append(option.getDescription());
            }
            appendWrappedText(sb, width, nextLineTabStop, optBuf.toString());
            if (it.hasNext()) {
                sb.append(getNewLine());
            }
        }
        return sb;
    }