Gruntfile to allow Lunr to work on a standard goHugo setup, some problems with multiline YAML variables.

gistfile1.txt

/*
Originale here:
https://gist.github.com/sebz/efddfc8fdcb6b480f567
*/
// var toml = require("toml"); 
var yaml = require("yamljs");
var S = require("string");

var CONTENT_PATH_PREFIX = "website/content";
var OUTPUT_FILE = "website/static/assets/js/lunr/PagesIndex.json";
var FMSEP = '---'; // other option '+++'

module.exports = function(grunt) {

    grunt.registerTask("lunr-index", function() {

        grunt.log.writeln("Build pages index");

        var indexPages = function() {
            var pagesIndex = [];
            grunt.file.recurse(CONTENT_PATH_PREFIX, function(abspath, rootdir, subdir, filename) {
                grunt.verbose.writeln("Parse file:",abspath);
                pagesIndex.push(processFile(abspath, filename));
            });

            return pagesIndex;
        };

        var processFile = function(abspath, filename) {
            var pageIndex;

            if (S(filename).endsWith(".html")) {
                pageIndex = processHTMLFile(abspath, filename);
            } else {
                pageIndex = processMDFile(abspath, filename);
            }

            return pageIndex;
        };

        var processHTMLFile = function(abspath, filename) {
            var content = grunt.file.read(abspath);
            var pageName = S(filename).chompRight(".html").s;
            var href = S(abspath)
                .chompLeft(CONTENT_PATH_PREFIX).s;
            return {
                title: pageName,
                href: href,
                content: S(content).trim().stripTags().stripPunctuation().s
            };
        };

        var processMDFile = function(abspath, filename) {
            var content = grunt.file.read(abspath);
            var pageIndex;
            // First separate the Front Matter from the content and parse it
            content = content.split(FMSEP);
            var frontMatter;
            var title = 'Mintlayer Page';
            try {
                // frontMatter = toml.parse(content[1].trim());
                frontMatter = yaml.parse(content[1].trim());
                // console.log( 'abspath', abspath );
                // console.log( 'title', frontMatter.title );
            } catch (e) {
                
                console.log( 'abspath', abspath );
                console.log(e.message);
            }
            

            var href = S(abspath).chompLeft(CONTENT_PATH_PREFIX).chompRight(".md").s;
            // href for index.md files stops at the folder name
            if (filename === "index.md") {
                href = S(abspath).chompLeft(CONTENT_PATH_PREFIX).chompRight(filename).s;
            }

            // Build Lunr index for this page
            if( frontMatter.hasOwnProperty('title') ) {
                tmptitle = frontMatter.title;
            } else {
               console.log( 'no title in: ', abspath ); 
            }
            
            pageIndex = {
                // title: frontMatter.title,
                title: tmptitle,
                tags: frontMatter.tags,
                href: href,
                content: S(content[2]).trim().stripTags().stripPunctuation().s
            };

            return pageIndex;
        };

        grunt.file.write(OUTPUT_FILE , JSON.stringify(indexPages()));
        grunt.log.ok("Index built");
    });
};