cannot use custom helpers within custom partial about dmd HOT 6 CLOSED

  {{#if ($ xy '==' 'abc')}}
       id: {{id}}
      longname: {{longname}}
      name: {{name}}
  {{/if}}

/**
         * Function to handle generic expressions,
         * can handle arbitrarily many arguments for math, but only one conditional (use subexpressions for nesting)
         *
         * example calls:
         * {{123 '+' 456}}
         * {{#if (7 '-' 3 '===' 4)}}
         * {{false '||' true}}
         * {{#if (2 '+' 3 '>' 4 '||' (7 '/' 3 '<' 6 '&&' (1 '!=' 2)))}}
         * {{> global/svg-icon icon=('graph' + 'line')}}
         *
         * @returns {mixed} returns a result or a boolean, dependant on the call
         */
        $: function () {
          if (arguments.length === 1) {
            return false;
          }
          var options = arguments[arguments.length - 1];
          var equation = Object.keys(arguments).map(x => arguments[x]).slice(0, -1); // ecma 6 transform to array
          // solve simple math
          for (var i = 0; i < equation.length-1 && equation.length >= 3;) {
            if (equation[i] === '+') {
              if (equation[i-1] && equation[i+1]) {
                equation.splice(i-1, 3, (equation[i-1]) + (equation[i+1]));
              } else if (equation[i-1]) {
                equation.splice(i-1, 3, (equation[i-1]));
              } else if (equation[i+1]) {
                equation.splice(i-1, 3, (equation[i+1]));
              } else {
                throw 'Invalid call to function.';
              }
            } else if (equation[i] === '-') {
              equation.splice(i-1, 3, (equation[i-1] || 0) - (equation[i+1] || 0));
            } else if (equation[i] === '*') {
              equation.splice(i-1, 3, (equation[i-1] || 0) * (equation[i+1] || 0));
            } else if (equation[i] === '/') {
              equation.splice(i-1, 3, (equation[i-1] || 0) / (equation[i+1] || 0));
            } else {
              ++i;
            }
          }
          if (equation.length === 3) {
            // compare (remaining) arguments
            if (equation[1] === '===') {
              return equation[0] === equation[2];
            } else if (equation[1] === '==') {
              return equation[0] == equation[2];
            } else if (equation[1] === '!=') {
              return equation[0] != equation[2];
            } else if (equation[1] === '!==') {
              return equation[0] !== equation[2];
            } else if (equation[1] === '<') {
              return equation[0] < equation[2];
            } else if (equation[1] === '<=') {
              return equation[0] <= equation[2];
            } else if (equation[1] === '>') {
              return equation[0] > equation[2];
            } else if (equation[1] === '>=') {
              return equation[0] >= equation[2];
            } else if (equation[1] === '&&') {
              return equation[0] && equation[2];
            } else if (equation[1] === '||') {
              return equation[0] || equation[2];
            } else {
              throw 'Invalid call to function.';
            }
          } else if (equation.length === 2) {
            if (equation[0] === '!') {
              return !equation[1];
            } else if (equation[0] === '-') {
              return -equation[1];
            } else {
              throw 'Invalid call to function.';
            }
          } else if (equation.length === 1) {
            // return value
            return equation[0];
          }
          throw 'Invalid call to function.';
        }

/**
 * API
 * Generates API files out of JSDOC within .js files
 */
gulp.task('build:api', function () {
  const jsdoc2md = require('jsdoc-to-markdown');
  const files = [];

  return gulp.src('./src/_global/production/scripts/**/*.js')
  .pipe(through(function(file, encoding, done) {
    files.push(file.path);
    done(null, file);
  }))
  .on('end', function() {
    files.forEach(function(file) {
      fs.writeFileSync(
        './src/_global/documentation/partials/_doc-helper/api/' + path.basename(file) + '.hbs',
        jsdoc2md.renderSync({
          files: file,
          partial: './src/_global/documentation/partials/_doc-helper/api/jsdocOverrides/*.hbs',
          lang: 'js',
          'no-gfm': true,
          separators: true,
          moduleIndexFormat: 'dl',
          noCache: true,
          configure: './jsdoc.json',
        })
      );
    });
  });
});