From 3789b8962d278db515ecc596971643b71178250e Mon Sep 17 00:00:00 2001
From: Aliaksei Ladyha <aliaksei_ladyha@epam.com>
Date: Tue, 5 Nov 2019 11:07:02 +0300
Subject: [PATCH] add option to skip dynamic chunks

---
 README.md                      |  5 ++++-
 source/chunks plugin.js        | 21 ++++++++++++++++++---
 source/client configuration.js |  8 ++++++--
 3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index 06561f2..e76aff8 100755
--- a/README.md
+++ b/README.md
@@ -296,7 +296,10 @@ const configuration = clientConfiguration(baseConfiguration, settings, {
 	silent: true,
 
 	// By default, chunk_info_filename is `webpack-chunks.json`
-	chunk_info_filename: 'submodule-webpack-chunks.json'
+	chunk_info_filename: 'submodule-webpack-chunks.json',
+
+	// Will not inlcude chunks that are not required for initial page load. ( dynamicly imported, etc. )
+	skipDynamicChunks: false
 }
 ```
 
diff --git a/source/chunks plugin.js b/source/chunks plugin.js
index dd6fced..87ac00c 100644
--- a/source/chunks plugin.js	
+++ b/source/chunks plugin.js	
@@ -25,7 +25,7 @@ ChunkFileNamesPlugin.prototype.apply = function(compiler)
 
 // Generates chunk filename info
 // (`assets_base_url` will be prepended to chunk file names)
-function filename_info(json, assets_base_url)
+function filename_info(json, assets_base_url, options)
 {
 	const assets_by_chunk = json.assetsByChunkName
 
@@ -53,8 +53,23 @@ function filename_info(json, assets_base_url)
 			.map(name => assets_base_url + name)
 	}
 
+	// leave only initial ( non dynamic ) chunks
+	function filterNonInitialChunks(chunkName) {
+		const chunkObj = json.chunks.find(chunkObj => chunkObj.names && chunkObj.names[0] === chunkName);
+		return chunkObj && chunkObj.initial;
+	}
+
+	function hasInitialChunks() {
+		return !!(json.chunks && json.chunks.length && json.chunks.find(chunkObj => chunkObj.initial));
+	}
+
+	let chunkNames = Object.keys(assets_by_chunk);
+	if (hasInitialChunks() && options.skipDynamicChunks) {
+		chunkNames = chunkNames.filter(filterNonInitialChunks);
+	}
+
 	// for each chunk name ("main", "common", ...)
-	Object.keys(assets_by_chunk).forEach(function(name)
+	chunkNames.forEach(function(name)
 	{
 		// log.debug(`getting javascript and styles for chunk "${name}"`)
 
@@ -118,5 +133,5 @@ function writeChunkFileNames(stats, options, webpack_configuration)
 	const output_file_path = chunk_info_file_path(webpack_configuration, options.chunk_info_filename)
 
 	// Write chunk filename info to disk
-	fs.outputFileSync(output_file_path, JSON.stringify(filename_info(json, assets_base_url)))
+	fs.outputFileSync(output_file_path, JSON.stringify(filename_info(json, assets_base_url, options)))
 }
diff --git a/source/client configuration.js b/source/client configuration.js
index e207193..70bf26c 100644
--- a/source/client configuration.js	
+++ b/source/client configuration.js	
@@ -29,7 +29,11 @@ export default function client_configuration(webpack_configuration, settings, op
 		// because `webpack-dev-server` seems to alter it
 		// by changing the already predefined `.output.path`.
 		//
-		new chunks_plugin(clone(configuration), { silent: settings.silent, chunk_info_filename: settings.chunk_info_filename })
+		new chunks_plugin(clone(configuration), {
+			silent: settings.silent,
+			chunk_info_filename: settings.chunk_info_filename,
+			skipDynamicChunks: settings.skipDynamicChunks || false
+		})
 	)
 
 	// CSS bundle filename (if specified)
@@ -228,4 +232,4 @@ function generate_extract_css_loaders(after_style_loader, development, extract_c
 	}
 
 	return extract_css_loaders
-}
\ No newline at end of file
+}