Fix generator deprecation warning being shown for each call

1 files changed, 10 insertions, 6 deletions

diff --git a/lib/template/index.js b/lib/template/index.js
index 410c2f5..9a5d92f 100644
--- a/lib/template/index.js
+++ b/lib/template/index.js
@@ -63,6 +63,13 @@ function TemplateEngine(output) {
     // Add default blocks and filters
     this.addBlocks(defaultBlocks);
     this.addFilters(defaultFilters);
+
+    // Build context for this book with depreacted fields
+    this.ctx = {
+        book: this.book,
+        output: this.output
+    };
+    error.deprecateField(this.ctx, 'generator', this.output.name, '"generator" property is deprecated, use "output.generator" instead');
 }
 
 // Bind a function to a context
@@ -71,12 +78,9 @@ TemplateEngine.prototype.bindContext = function(func) {
     var that = this;
 
     return function() {
-        var ctx = {
-            ctx: this.ctx,
-            book: that.book,
-            output: that.output
-        };
-        error.deprecateField(ctx, 'generator', that.output.name, '"generator" property is deprecated, use "output.generator" instead');
+        var ctx = _.extend({
+            ctx: this.ctx
+        }, that.ctx);
 
         return func.apply(ctx, arguments);
     };