Add base loader to resolve git dependencies

1 files changed, 36 insertions, 1 deletions

diff --git a/lib/template.js b/lib/template.js
index 315a373..76bb9ab 100644
--- a/lib/template.js
+++ b/lib/template.js
@@ -1,15 +1,50 @@
 var _ = require("lodash");
 var Q = require("q");
+var path = require("path");
 var nunjucks = require("nunjucks");
 
+var git = require("./utils/git");
+var fs = require("./utils/fs");
 var pkg = require("../package.json");
 
+
+// The loader should handle relative and git url
+var BookLoader = nunjucks.Loader.extend({
+	async: true,
+
+    init: function(book) {
+    	this.book = book;
+    },
+
+    getSource: function(fileurl, callback) {
+    	var that = this;
+
+		git.resolveFile(fileurl)
+		.then(function(filepath) {
+			// Is local file
+			if (!filepath) filepath = path.resolve(that.book.root, fileurl);
+			else that.book.logDebug("resolve from git", fileurl, "to", filepath)
+
+			//  Read file from absolute path
+			return fs.readFile(filepath)
+    		.then(function(source) {
+    			return {
+    				src: source.toString(),
+    				path: filepath
+    			}
+    		});
+		})
+		.nodeify(callback);
+    }
+});
+
+
 var TemplateEngine = function(book) {
 	this.book = book;
 
 	// Nunjucks env
 	this.env = new nunjucks.Environment(
-		new nunjucks.FileSystemLoader(book.root),
+		new BookLoader(book),
 		{
 			// Escaping is done after by the markdown parser
 			autoescape: false