private void execute()

in freemarker-docgen-core/src/main/java/org/freemarker/docgen/core/PrintTextWithDocgenSubstitutionsDirective.java [152:199]
43 lines of code
8 McCabe index (conditional complexity)

        private void execute() throws TemplateException, IOException {
            int lastUnprintedIdx = 0;
            parseText: while (true) {
                cursor = findNextDocgenTagStart(lastUnprintedIdx);
                if (cursor == -1) {
                    break parseText;
                } else {
                    lastDocgenTagStart = cursor;
                }

                HTMLOutputFormat.INSTANCE.output(text.substring(lastUnprintedIdx, cursor), out);
                lastUnprintedIdx = cursor;

                cursor += DOCGEN_TAG_START.length();
                skipRequiredToken(".");
                String subvarName = fetchRequiredVariableName();

                if (Transform.VAR_CUSTOM_VARIABLES.equals(subvarName)) {
                    skipRequiredToken(".");
                    String customVarName = fetchRequiredVariableName();
                    skipRequiredToken(DOCGEN_TAG_END);
                    lastUnprintedIdx = cursor;

                    insertCustomVariable(customVarName);
                } else if (INSERT_FILE.directiveName.equals(subvarName)) {
                    InsertDirectiveArgs args = fetchInsertDirectiveArgs(subvarName, INSERT_FILE);
                    lastUnprintedIdx = cursor;
                    insertFile(args);
                } else if (INSERT_WITH_OUTPUT.directiveName.equals(subvarName)) {
                    InsertDirectiveArgs args = fetchInsertDirectiveArgs(subvarName, INSERT_WITH_OUTPUT);
                    lastUnprintedIdx = cursor;
                    insertCommandAndOutput(INSERT_WITH_OUTPUT, args);
                } else if (CHECK_COMMAND.directiveName.equals(subvarName)) {
                    InsertDirectiveArgs args = fetchInsertDirectiveArgs(subvarName, CHECK_COMMAND);
                    lastUnprintedIdx = cursor;
                    insertCommandAndOutput(CHECK_COMMAND, args);
                } else if (subvarName.equals(WD)) {
                    throw new TemplateException(
                            "The " + WD + " docgen subvariable can only be used in the nested content of Docgen "
                                    + "directives that specify a command to run.", env);
                } else {
                    throw new TemplateException(
                            "Unsupported docgen subvariable " + StringUtil.jQuote(subvarName) + ".", env);
                }

            }
            HTMLOutputFormat.INSTANCE.output(text.substring(lastUnprintedIdx, text.length()), out);
        }