Add dependencies referenced by posthtml-include (#1355)

src/transforms/posthtml.js

@@ -24,7 +24,17 @@ async function getConfig(asset) {
   }
 
   config = Object.assign({}, config);
-  config.plugins = await loadPlugins(config.plugins, asset.name);
+  const plugins = config.plugins;
+  if (typeof plugins === 'object') {
+    const depConfig = {
+      addDependencyTo: {
+        addDependency: name =>
+          asset.addDependency(name, {includedInParent: true})
+      }
+    };
+    Object.keys(plugins).forEach(p => Object.assign(plugins[p], depConfig));
+  }
+  config.plugins = await loadPlugins(plugins, asset.name);
   config.skipParse = true;
   return config;
 }

test/html.js

@@ -102,6 +102,16 @@ describe('html', function() {
     });
   });
 
+  it('should add dependencies referenced by posthtml-include', async () => {
+    const b = await bundle(
+      __dirname + '/integration/posthtml-assets/index.html'
+    );
+    const asset = b.assets.values().next().value;
+    const other = __dirname + '/integration/posthtml-assets/other.html';
+    assert(asset.dependencies.has(other));
+    assert(asset.dependencies.get(other).includedInParent);
+  });
+
   it('should insert sibling CSS bundles for JS files in the HEAD', async function() {
     let b = await bundle(__dirname + '/integration/html-css/index.html');