Render indent for standalone partials

lib/handlebars/compiler/compiler.js

@@ -217,7 +217,7 @@ Compiler.prototype = {
       this.opcode('push', 'depth0');
     }
 
-    this.opcode('invokePartial', partialName.name);
+    this.opcode('invokePartial', partialName.name, partial.indent || '');
     this.opcode('append');
   },
 

lib/handlebars/compiler/javascript-compiler.js

@@ -596,8 +596,8 @@ JavaScriptCompiler.prototype = {
   //
   // This operation pops off a context, invokes a partial with that context,
   // and pushes the result of the invocation back.
-  invokePartial: function(name) {
-    var params = [this.nameLookup('partials', name, 'partial'), "'" + name + "'", this.popStack(), this.popStack(), "helpers", "partials"];
+  invokePartial: function(name, indent) {
+    var params = [this.nameLookup('partials', name, 'partial'), "'" + indent + "'", "'" + name + "'", this.popStack(), this.popStack(), "helpers", "partials"];
 
     if (this.options.data) {
       params.push("data");

lib/handlebars/runtime.js

@@ -31,18 +31,31 @@ export function template(templateSpec, env) {
   // for external users to override these as psuedo-supported APIs.
   env.VM.checkRevision(templateSpec.compiler);
 
-  var invokePartialWrapper = function(partial, name, context, hash, helpers, partials, data) {
+  var invokePartialWrapper = function(partial, indent, name, context, hash, helpers, partials, data) {
     if (hash) {
       context = Utils.extend({}, context, hash);
     }
 
     var result = env.VM.invokePartial.call(this, partial, name, context, helpers, partials, data);
-    if (result != null) { return result; }
 
-    if (env.compile) {
+    if (result == null && env.compile) {
       var options = { helpers: helpers, partials: partials, data: data };
       partials[name] = env.compile(partial, { data: data !== undefined }, env);
-      return partials[name](context, options);
+      result = partials[name](context, options);
+    }
+    if (result != null) {
+      if (indent) {
+        var lines = result.split('\n');
+        for (var i = 0, l = lines.length; i < l; i++) {
+          if (!lines[i] && i + 1 === l) {
+            break;
+          }
+
+          lines[i] = indent + lines[i];
+        }
+        result = lines.join('\n');
+      }
+      return result;
     } else {
       throw new Exception("The partial " + name + " could not be compiled when running in runtime-only mode");
     }