Generate LICENCE.txt on build

.config/webpack/webpack.config.ts

@@ -10,9 +10,10 @@ import ESLintPlugin from 'eslint-webpack-plugin';
 import ForkTsCheckerWebpackPlugin from 'fork-ts-checker-webpack-plugin';
 import LiveReloadPlugin from 'webpack-livereload-plugin';
 import path from 'path';
+import WebpackHookPlugin from 'webpack-hook-plugin';
 import ReplaceInFileWebpackPlugin from 'replace-in-file-webpack-plugin';
-import { Configuration } from 'webpack';
 
+import { Configuration } from 'webpack';
 import { getPackageJson, getPluginJson, hasReadme, getEntries, isWSL } from './utils';
 import { SOURCE_DIR, DIST_DIR } from './constants';
 
@@ -195,6 +196,9 @@ const config = async (env): Promise<Configuration> => {
             }),
           ]
         : []),
+      new WebpackHookPlugin({
+          onBuildEnd: ['node generate-licenses.js']
+      })
     ],
 
     resolve: {

generate-licenses.js

@@ -0,0 +1,33 @@
+const fs = require('fs');
+const path = require('path');
+const { execSync } = require('child_process');
+
+// Run license-checker to generate a JSON file
+execSync('license-checker --json --production > licenses.json', { stdio: 'inherit' });
+
+// Read the licenses.json file
+const licensesFilePath = path.join(__dirname, 'licenses.json');
+const licensesData = JSON.parse(fs.readFileSync(licensesFilePath, 'utf8'));
+
+// Extract unique licenses and packages
+const licensesSet = new Set();
+const packages = [];
+
+for (const [packageName, licenseInfo] of Object.entries(licensesData)) {
+    const license = licenseInfo.licenses || 'Unknown';
+    licensesSet.add(license);
+    packages.push(`${packageName}; ${license}`);
+}
+
+// Convert sets to arrays and sort them
+const licenses = Array.from(licensesSet).sort();
+const sortedPackages = packages.sort();
+
+// Generate the output string
+const output = `Licences:\n${licenses.join('\n')}\n\nPackages:\n${sortedPackages.join('\n')}`;
+
+// Write the output to a file
+const outputFilePath = path.join(__dirname, 'dist/LICENCES.txt');
+fs.writeFileSync(outputFilePath, output, 'utf8');
+
+console.log('License information has been written to licenses-output.txt');