webpack 5/laravel-mix 6 support

Author: AdrianMrn

src/index.ts

@@ -4,6 +4,7 @@ import { AxiosError } from 'axios';
 import fs = require('fs');
 const { default: axios } = require('axios'); // Temporary replacement for `import * as axios from 'axios';` while https://github.com/axios/axios/issues/1975 isn't in a release
 import { flareLog, uuidv4, removeQuery } from './util';
+import path = require('path');
 
 type PluginOptions = {
     key: string;
@@ -72,7 +73,7 @@ class FlareWebpackPluginSourcemap {
                         console.error(error);
                     }
 
-                    compilation.warnings.push(`@flareapp/flare-webpack-plugin-sourcemap: ${error.message}`);
+                    compilation.warnings.push(`@flareapp/flare-webpack-plugin-sourcemap: ${error.message || error}`);
                     cb();
                 });
         };
@@ -115,13 +116,11 @@ class FlareWebpackPluginSourcemap {
 
             if (!sourcemaps.length) {
                 return reject(
-                    `No sourcemap files were found. Make sure sourcemaps are being generated by adding this line to your webpack config: devtool: "hidden-source-map".
-                    If you don't want to upload your sourcemaps to your server, you can add the "removeSourcemaps: true" config option to the Flare webpack plugin.
-                    Laravel Mix' versioning is currently broken with "removeSourcemaps" enabled.`
+                    `No sourcemap files were found. Make sure sourcemaps are being generated by adding this line to your webpack config: devtool: "hidden-source-map". If you don't want to upload your sourcemaps to your server, you can add the "removeSourcemaps: true" config option to the Flare webpack plugin. Laravel Mix' versioning is currently broken with "removeSourcemaps" enabled.`
                 );
             }
 
-            Promise.all(sourcemaps.map(sourcemap => this.uploadSourcemap(sourcemap)))
+            Promise.all(sourcemaps.map((sourcemap) => this.uploadSourcemap(sourcemap)))
                 .then(() => {
                     flareLog('Successfully uploaded sourcemaps to Flare.');
 
@@ -151,11 +150,14 @@ class FlareWebpackPluginSourcemap {
         }
 
         return chunks.reduce((sourcemaps, currentChunk) => {
-            const filename = currentChunk.files.find(file => /\.js/.test(file));
-            const sourcemapPath = currentChunk.files.find(file => /\.js\.map/.test(file));
+            const filename = currentChunk.files.find((file) => /\.js/.test(file));
+            // @ts-expect-error
+            const sourcemapPath = (currentChunk.auxiliaryFiles || currentChunk.files).find((file) =>
+                /\.js\.map/.test(file)
+            );
 
             if (filename && sourcemapPath) {
-                const sourcemapLocation = removeQuery(compiler.outputFileSystem.join(outputPath, sourcemapPath));
+                const sourcemapLocation = removeQuery(path.join(outputPath, sourcemapPath));
 
                 this.sourcemapPaths.push(sourcemapLocation);
 
@@ -203,7 +205,7 @@ class FlareWebpackPluginSourcemap {
     }
 
     removeAllSourcemaps() {
-        this.sourcemapPaths.forEach(path => {
+        this.sourcemapPaths.forEach((path) => {
             try {
                 console.log('removing', path);
                 fs.unlinkSync(path);