Improve meta tags for books

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/generate/template.js b/lib/generate/template.js
new file mode 100644
index 0000000..a4ac4fd
--- /dev/null
+++ b/lib/generate/template.js
@@ -0,0 +1,47 @@
+var path = require("path");
+var swig = require('swig');
+var hljs = require('highlight.js');
+
+var pkg = require('../../package.json');
+
+swig.setDefaults({
+    locals: {
+        gitbook: {
+            version: pkg.version
+        }
+    }
+});
+
+// Swig filter for returning the count of lines in a code section
+swig.setFilter('lines', function(content) {
+    return content.split('\n').length;
+});
+
+// Swig filter for returning a link to the associated html file of a markdown file
+swig.setFilter('mdLink', function(link) {
+    var link = link.replace(".md", ".html");
+    if (link == "README.html") link = "index.html";
+    return link;
+});
+
+
+// Swig filter: highlight coloration
+swig.setFilter('code', function(code, lang) {
+    try {
+        return hljs.highlight(lang, code).value;
+    } catch(e) {
+        return hljs.highlightAuto(code).value;
+    }
+});
+
+// Convert a level into a deep level
+swig.setFilter('lvl', function(lvl) {
+    return lvl.split(".").length;
+});
+
+// Join path
+swig.setFilter('pathJoin', function(base, _path) {
+    return path.join(base, _path);
+});
+
+module.exports = swig;