Using a static, not random filename for the _tmp_shared entry

This small, internal change was causing the final output code to be
*slightly* different.

Author: weaverryan

lib/config-generator.js

@@ -48,6 +48,7 @@ const path = require('path');
 const stringEscaper = require('./utils/string-escaper');
 const crypto = require('crypto');
 const logger = require('./logger');
+const os = require('os');
 
 class ConfigGenerator {
     /**
@@ -131,14 +132,19 @@ class ConfigGenerator {
              *
              * See shared-entry-concat-plugin.js for more details.
              */
-            const tmpFileObject = tmp.fileSync();
+            const staticHashKey = crypto
+                .createHash('md4')
+                .update(this.webpackConfig.outputPath)
+                .digest('hex')
+                .slice(0, 8);
+            const tmpFilename = path.join(os.tmpdir(), '_webpack_encore_tmp_module' + staticHashKey + '.js');
             const pathToRequire = path.resolve(this.webpackConfig.getContext(), this.webpackConfig.sharedCommonsEntryFile);
             fs.writeFileSync(
-                tmpFileObject.name,
+                tmpFilename,
                 `require('${stringEscaper(pathToRequire)}')`
             );
 
-            entry[sharedEntryTmpName] = tmpFileObject.name;
+            entry[sharedEntryTmpName] = tmpFilename;
         }
 
         if (this.webpackConfig.copyFilesConfigs.length > 0) {

lib/webpack/shared-entry-concat-plugin.js

@@ -9,7 +9,6 @@
 
 'use strict';
 
-const fs = require('fs');
 const sharedEntryTmpName = require('../utils/sharedEntryTmpName');
 const RawSource = require('webpack-sources/lib/RawSource');