Resolve relative links to GitHub repo, fixes #6

Useful for linking to blobs and other files …

lib/generate/template.js

@@ -38,7 +38,10 @@ var initTemplate = function(options) {
 
         // Parse sections
         .then(function(markdown) {
-            return parse.page(markdown);
+            return parse.page(markdown, {
+                repo: options.locals.githubId,
+                dir: path.dirname(_input) || '/'
+            });
         })
 
         //Calcul template

lib/parse/page.js

@@ -46,19 +46,22 @@ function sectionType(nodes, idx) {
 }
 
 // Render a section using our custom renderer
-function render(section) {
+function render(section, _options) {
     // marked's Render expects this, we don't use it yet
     section.links = {};
 
     // Build options using defaults and our custom renderer
     var options = _.extend({}, marked.defaults, {
-        renderer: renderer()
+        renderer: renderer(null, _options)
     });
 
     return marked.parser(section, options);
 }
 
-function parsePage(src) {
+function parsePage(src, options) {
+    options = options || {};
+
+    // Lex file
     var nodes = marked.lexer(src);
 
     return _.chain(splitSections(nodes))
@@ -113,7 +116,7 @@ function parsePage(src) {
         return {
             id: id,
             type: section.type,
-            content: render(section)
+            content: render(section, options)
         };
     })
     .value();

lib/parse/renderer.js

@@ -1,14 +1,18 @@
 var url = require('url');
 var inherits = require('util').inherits;
 
+var path = require('path');
+
 var marked = require('marked');
 
 
-function GitBookRenderer(options) {
+function GitBookRenderer(options, extra_options) {
     if(!(this instanceof GitBookRenderer)) {
-        return new GitBookRenderer(options);
+        return new GitBookRenderer(options, extra_options);
     }
     GitBookRenderer.super_.call(this, options);
+
+    this._extra_options = extra_options;
 }
 inherits(GitBookRenderer, marked.Renderer);
 
@@ -39,6 +43,16 @@ GitBookRenderer.prototype.link = function(href, title, text) {
     // Parsed version of the url
     var parsed = url.parse(href);
 
+    var o = this._extra_options;
+    // Relative link, rewrite it to point to github repo
+    if(parsed.path[0] != '/' && o && o.repo && o.dir) {
+        href = 'https://github.com/' + o.repo + '/blob' + path.normalize(path.join(
+            '/',
+            o.dir,
+            href
+        ));
+        parsed = url.parse(href);
+    }
 
     // Generate HTML for link
     var out = '<a href="' + href + '"';