Helper script for finding unused files

bin/vs_base_find_used_files.js

@@ -0,0 +1,24 @@
+// @ts-check
+
+const { dirname } = require("path");
+const ts = require("typescript");
+
+function findUnusedSymbols(
+  /** @type string */ tsconfigPath
+) {
+  // Initialize a program using the project's tsconfig.json
+  const configFile = ts.readConfigFile(tsconfigPath, ts.sys.readFile);
+  const parsedConfig = ts.parseJsonConfigFileContent(configFile.config, ts.sys, dirname(tsconfigPath));
+
+  // Initialize a program with the parsed configuration
+  const program = ts.createProgram(parsedConfig.fileNames, {
+    ...parsedConfig.options,
+    noUnusedLocals: true
+  });
+  const sourceFiles = program.getSourceFiles();
+  const usedBaseSourceFiles = sourceFiles.filter(e => e.fileName.includes('src/vs/base/'));
+  console.log('Source files used in src/vs/base/:', usedBaseSourceFiles.map(e => e.fileName.replace(/^.+\/src\//, 'src/')).sort((a, b) => a.localeCompare(b)));
+}
+
+// Example usage
+findUnusedSymbols("./src/browser/tsconfig.json");