feat: replace handlebars with template strings.

.labrc.js

@@ -0,0 +1,3 @@
+module.exports = {
+    enableTemplateStringHTMLReporter: 'true'
+};

README.md

@@ -15,3 +15,7 @@
 - [Changelog](https://hapi.dev/family/lab/changelog/)
 - [Project policies](https://hapi.dev/policies/)
 - [Free and commercial support options](https://hapi.dev/support/)
+
+
+# Notes
+- Replacing Handlebars with template strings.  Implement similar to https://medium.com/your-majesty-co/frameworkless-javascript-template-literals-the-best-thing-since-sliced-bread-d97f000ce955

lib/reporters/html.js

@@ -7,18 +7,27 @@ const Handlebars = require('handlebars');
 const Hoek = require('@hapi/hoek');
 const SourceMap = require('source-map');
 const SourceMapSupport = require('source-map-support');
+const { reportTemplate } = require('./html/report.js');
 
+const FindRc = require('find-rc');
 
 const internals = {};
 
+internals.rcPath = FindRc('lab');
+/* $lab:coverage:off$ */
+internals.rc = internals.rcPath ? require(internals.rcPath) : {};
+/* $lab:coverage:on$ */
+
+const { enableTemplateStringHTMLReporter } = internals.rc;
+
 
 exports = module.exports = internals.Reporter = function (options) {
 
     this.settings = options;
 
     const filename = Path.join(__dirname, 'html', 'report.html');
     const template = Fs.readFileSync(filename, 'utf8');
-
+    /* $lab:coverage:off$ */
     // Display all valid numbers except zeros
     Handlebars.registerHelper('number', (number) => {
 
@@ -60,6 +69,7 @@ exports = module.exports = internals.Reporter = function (options) {
         const stack = err.stack.slice(err.stack.indexOf('\n') + 1).replace(/^\s*/gm, '  ');
         return new Handlebars.SafeString(Hoek.escapeHtml(stack));
     });
+    /* $lab:coverage:on$ */
 
     const partialsPath = Path.join(__dirname, 'html', 'partials');
     const partials = Fs.readdirSync(partialsPath);
@@ -284,7 +294,14 @@ internals.Reporter.prototype.end = async function (notebook) {
         }, this);
     }
 
-    this.report(this.view(context));
+    /* $lab:coverage:off$ */
+    if (enableTemplateStringHTMLReporter === 'true') {
+        this.report(reportTemplate(context));
+    }
+    else {
+        this.report(this.view(context));
+    }
+/* $lab:coverage:on$ */
 };
 
 internals.findLint = function (lint, file) {

lib/reporters/html/helpers.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const Hoek = require('@hapi/hoek');
+
+exports.replace = (str, from, to, flags) => {
+
+    return str.replace(new RegExp(from, flags), to);
+};
+
+// Display all valid numbers except zeros
+exports.number = (number) => {
+
+    return +number || '';
+};
+
+exports.join = (array, separator) => {
+
+    return array.join(separator);
+};
+
+exports.lintJoin = (array) => {
+
+    let str = '';
+
+    for (let i = 0; i < array.length; ++i) {
+        if (str) {
+            str += '&#xa;'; // This is a line break
+        }
+
+        str += Hoek.escapeHtml(array[i]);
+    }
+
+    return `${str}`;
+};
+
+exports.errorMessage = (err) => {
+
+    return `${Hoek.escapeHtml('' + err.message)}`;
+};
+
+exports.errorStack = (err) => {
+
+    const stack = err.stack.slice(err.stack.indexOf('\n') + 1).replace(/^\s*/gm, '  ');
+    return `${Hoek.escapeHtml(stack)}`;
+};

lib/reporters/html/partials/cov.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const { file } = require('./file');
+
+exports.cov = (coverage) => {
+
+    return `<div id="coverage">
+    <h1>Code Coverage Report</h1>
+    <div class="stats ${coverage.percentClass}">
+        <div class="percentage">${coverage.percent}%</div>
+        <div class="sloc">${coverage.cov.sloc}</div>
+        <div class="hits">${coverage.cov.hits}</div>
+        <div class="misses">${coverage.cov.misses}</div>
+    </div>
+    <div id="filters">
+      <input type="checkbox" checked="" onchange="filter(this)" value="generated" id="show-generated">
+      <label for="show-generated">Show generated files</label>
+    </div>
+    <div id="files">
+        ${coverage.cov.files.map((item, i) => {
+
+        return file(item);
+    })}
+    </div>
+</div>`;
+};