fix(loader): get rid of webpack--version

Webpack versions util cause some troubles, so this fix should cover them

BREAKING CHANGE:
delete get-webpack-version.js

ISSUES CLOSED: #437, #417

examples/base-webpack.config.js

@@ -1,8 +1,5 @@
 const path = require('path');
 const packageName = require('../package.json').name;
-const { getWebpackVersion } = require('../lib/utils');
-
-const webpackVersion = getWebpackVersion();
 
 const config = {
   output: {
@@ -24,8 +21,4 @@ const config = {
   }
 };
 
-if (webpackVersion >= 4) {
-  config.mode = 'development';
-}
-
 module.exports = config;

lib/plugin.js

@@ -9,8 +9,7 @@ const {
   MappedList,
   replaceInModuleSource,
   replaceSpritePlaceholder,
-  getMatchedRule,
-  getWebpackVersion
+  getMatchedRule
 } = require('./utils');
 
 const defaultConfig = {
@@ -77,11 +76,11 @@ class SVGSpritePlugin {
           compilation.hooks
             .afterOptimizeChunks
             .tap(NAMESPACE, () => this.afterOptimizeChunks(compilation));
-          if (!getWebpackVersion.IS_5) {
-            compilation.hooks
-              .optimizeExtractedChunks
-              .tap(NAMESPACE, chunks => this.optimizeExtractedChunks(chunks));
-          }
+
+          compilation.hooks
+            .optimizeExtractedChunks
+            .tap(NAMESPACE, chunks => this.optimizeExtractedChunks(chunks));
+
           compilation.hooks
             .additionalAssets
             .tapPromise(NAMESPACE, () => {

lib/utils/get-matched-rule.js

@@ -1,14 +1,11 @@
 /* eslint-disable global-require */
-const getWebpackVersion = require('./get-webpack-version');
 
 let getMatchedRule = null;
 
-if (getWebpackVersion.IS_5) {
-  // webpack5 and upper
-  getMatchedRule = require('./get-matched-rule-5');
-} else {
-  // webpack4 and lower
+try {
   getMatchedRule = require('./get-matched-rule-4');
+} catch (e) {
+  getMatchedRule = require('./get-matched-rule-5');
 }
 
 module.exports = getMatchedRule;

lib/utils/index.js

@@ -4,7 +4,6 @@ module.exports.generateSpritePlaceholder = require('./generate-sprite-placeholde
 module.exports.getAllModules = require('./get-all-modules');
 // module.exports.getLoaderOptions = require('./get-loader-options');
 module.exports.getModuleChunk = require('./get-module-chunk');
-module.exports.getWebpackVersion = require('./get-webpack-version');
 module.exports.getMatchedRule = require('./get-matched-rule');
 module.exports.isModuleShouldBeExtracted = require('./is-module-should-be-extracted');
 module.exports.interpolate = require('./interpolate');

package.json

@@ -100,9 +100,9 @@
     "release:dry-run": "standard-version --no-verify",
     "test": "mocha test/*.test.js",
     "test:all": "yarn test:webpack-2 && yarn test:webpack-3 && yarn test:webpack-4",
-    "test:webpack-2": "yarn env webpack-2 && yarn test",
-    "test:webpack-3": "yarn env webpack-3 && yarn test",
-    "test:webpack-4": "yarn env webpack-4 && yarn test",
+    "test:webpack-2": "yarn env webpack-2 && env WEBPACK_VERSION=2 yarn test",
+    "test:webpack-3": "yarn env webpack-3 && env WEBPACK_VERSION=3 yarn test",
+    "test:webpack-4": "yarn env webpack-4 && env WEBPACK_VERSION=4 yarn test",
     "upload-coverage": "codeclimate-test-reporter < coverage/lcov.info"
   }
 }

test/loader.test.js

@@ -3,7 +3,6 @@ const webpack = require('webpack');
 const HtmlPlugin = require('html-webpack-plugin');
 
 const { isWebpack1 } = require('../lib/utils');
-const webpackVersion = require('../lib/utils/get-webpack-version');
 const { loaderPath, fixturesPath } = require('./_config');
 const {
   rule,
@@ -75,7 +74,7 @@ describe('loader and plugin', () => {
 
       it('should warn if there is remaining loaders in extract mode', async () => {
         const v4Config = {};
-        if (webpackVersion.IS_4) {
+        if (process.env.WEBPACK_VERSION === '4') {
           v4Config.mode = 'development';
           v4Config.devtool = false;
         }
@@ -212,7 +211,7 @@ describe('loader and plugin', () => {
         const extractor = extractPlugin('[name].css', { allChunks: true });
 
         const v4Config = {};
-        if (webpackVersion.IS_4) {
+        if (process.env.WEBPACK_VERSION === '4') {
           v4Config.mode = 'development';
           v4Config.devtool = false;
         }
@@ -244,8 +243,8 @@ describe('loader and plugin', () => {
         assets['entry2.css'].source().should.contain('entry2.svg');
       });
 
-      if (!webpackVersion.IS_4) {
-        it('should work in combination with CommonsChunkPlugin', async () => {
+      it('should work in combination with CommonsChunkPlugin', async () => {
+        try {
           const extractor = extractPlugin('[name].css');
           const { assets } = await compile({
             context: path.resolve(fixturesPath, 'extract-text-webpack-plugin/with-commons-chunk-plugin'),
@@ -268,8 +267,10 @@ describe('loader and plugin', () => {
           });
 
           assets['common.css'].source().should.contain('common.svg');
-        });
-      }
+        } catch (e) {
+          e.message.should.contain('webpack.optimize.CommonsChunkPlugin has been removed');
+        }
+      });
     });
 
     describe('html-loader interop', () => {
@@ -318,7 +319,7 @@ describe('loader and plugin', () => {
     });
 
     // webpack 3 scope hoisting interop
-    if (webpackVersion.IS_3) {
+    if (process.env.WEBPACK_VERSION === '3') {
       // eslint-disable-next-line global-require,import/no-unresolved
       const ModuleConcatenationPlugin = require('webpack/lib/optimize/ModuleConcatenationPlugin');
 
@@ -429,7 +430,7 @@ describe('loader and plugin', () => {
       const spriteFilename = defaultSpriteFilename;
 
       const v4Config = {};
-      if (webpackVersion.IS_4) {
+      if (process.env.WEBPACK_VERSION === '4') {
         v4Config.mode = 'development';
         v4Config.devtool = false;
       }
@@ -451,7 +452,7 @@ describe('loader and plugin', () => {
       const spriteFilename = defaultSpriteFilename;
 
       const v4Config = {};
-      if (webpackVersion.IS_4) {
+      if (process.env.WEBPACK_VERSION === '4') {
         v4Config.mode = 'development';
         v4Config.devtool = false;
       }