Parse _Sidebar.md line by line

* This supports multiple formats in one file
* If a line doesn't match either format it is copied over instead of throwing an error

src/Site.js

@@ -521,29 +521,31 @@ Site.prototype.addSiteNavToDefaultLayout = function () {
 Site.prototype.parseSidebarFileContent = function (rawSiteNavContent) {
   let siteNavContent = '';
   const doubleSquareBracketsFormatRegex = /\[\[([\w-]*)(\|)?([\w-]*)?\]\]/g;
-  const markdownLinkFormatRegex = /(?:__|[*#])|\[(.*?)\]\(.*?\)/g;
+  const markdownLinkFormatRegex = /\[(.*?)\]\((.*?)\)/g;
   const baseUrlSubst = '{{baseUrl}}';
-  if (rawSiteNavContent.match(doubleSquareBracketsFormatRegex)) {
-    rawSiteNavContent.split('\n').forEach((navLine) => {
+  rawSiteNavContent.split('\n').forEach((navLine) => {
+    if (navLine.match(doubleSquareBracketsFormatRegex)) {
       const navLineGroups = doubleSquareBracketsFormatRegex.exec(navLine);
       const name = navLineGroups[1];
       const link = navLineGroups[2] === undefined ? '' : navLineGroups[3];
       const newNavLine = link === ''
-        ? `[${name}](${baseUrlSubst}/${name}.html)` : `[${name}](${baseUrlSubst}/${link}.html)`;
+        ? `[${name}](${baseUrlSubst}/${name.replace(/\s/g, '-')}.html)`
+        : `[${name}](${baseUrlSubst}/${link.replace(/\s/g, '-')}.html)`;
       const finalNavLine = navLine.replace(doubleSquareBracketsFormatRegex, newNavLine);
       siteNavContent += `${finalNavLine}\n`;
-    });
-  } else if (rawSiteNavContent.match(markdownLinkFormatRegex)) {
-    siteNavContent = rawSiteNavContent;
-    const openingBracketsRegex = /\([.]/g;
-    siteNavContent = siteNavContent.replace(openingBracketsRegex, baseUrlSubst);
-    const closingBracketsRegex = /\)/g;
-    const extSubst = '.html)';
-    siteNavContent = siteNavContent.replace(closingBracketsRegex, extSubst).replace('/.html', '/');
-  } else {
-    return Promise.reject(new Error('The current format in _Sidebar.md is not supported.'
-      + ' A default site navigation menu will be created instead.'));
-  }
+    } else if (navLine.match(markdownLinkFormatRegex)) {
+      const navLineGroups = markdownLinkFormatRegex.exec(navLine);
+      const name = navLineGroups[1];
+      const link = navLineGroups[2];
+      const newNavLine = link === ''
+        ? `[${name}](${baseUrlSubst}/${name.replace(/\s/g, '-')}.html)`
+        : `[${name}](${baseUrlSubst}/${link.replace('./', '').replace(/\s/g, '-')}.html)`;
+      const finalNavLine = navLine.replace(markdownLinkFormatRegex, newNavLine);
+      siteNavContent += `${finalNavLine}\n`;
+    } else {
+      siteNavContent += `${navLine}\n`;
+    }
+  });
   return siteNavContent;
 };