rudimentary parallel parse

scripts/build/options.mjs

@@ -4,7 +4,7 @@ import os from "os";
 const ci = ["1", "true"].includes(process.env.CI ?? "");
 
 const parsed = minimist(process.argv.slice(2), {
-    boolean: ["dirty", "light", "colors", "lkg", "soft", "fix", "failed", "keepFailed", "force", "built", "ci", "bundle", "typecheck", "lint", "coverage"],
+    boolean: ["dirty", "light", "colors", "lkg", "soft", "fix", "failed", "keepFailed", "force", "built", "ci", "bundle", "typecheck", "lint", "coverage", "structs"],
     string: ["browser", "tests", "break", "host", "reporter", "stackTraceLimit", "timeout", "shards", "shardId"],
     alias: {
         /* eslint-disable quote-props */
@@ -43,6 +43,7 @@ const parsed = minimist(process.argv.slice(2), {
         typecheck: true,
         lint: true,
         coverage: false,
+        structs: false,
     }
 });
 
@@ -57,6 +58,12 @@ if (!options.bundle && !options.typecheck) {
     throw new Error("--no-typecheck cannot be passed when bundling is disabled");
 }
 
+// TODO(rbuckton): remove this when esbuild supports `using` and decorators.
+if (options.structs) {
+    options.bundle = false;
+    options.lkg = true;
+}
+
 export default options;
 
 
@@ -90,5 +97,6 @@ export default options;
  * @property {boolean} typecheck
  * @property {boolean} lint
  * @property {boolean} coverage
+ * @property {boolean} structs
  */
 void 0;

scripts/build/tests.mjs

@@ -35,6 +35,7 @@ export async function runConsoleTests(runJs, defaultReporter, runInParallel, opt
     const shards = +cmdLineOptions.shards || undefined;
     const shardId = +cmdLineOptions.shardId || undefined;
     const coverage = cmdLineOptions.coverage;
+    const structs = cmdLineOptions.structs;
     if (!cmdLineOptions.dirty) {
         if (options.watching) {
             console.log(chalk.yellowBright(`[watch] cleaning test directories...`));
@@ -119,6 +120,12 @@ export async function runConsoleTests(runJs, defaultReporter, runInParallel, opt
         args.push(runJs);
     }
 
+    if (structs) {
+        args.unshift("--harmony-struct");
+        args.unshift("--shared-string-table");
+        args.unshift("--enable-source-map");
+    }
+
     /** @type {number | undefined} */
     let errorStatus;
 

scripts/dtsBundler.mjs

@@ -331,7 +331,7 @@ function verifyMatchingSymbols(decl) {
  * @param {ts.Symbol} moduleSymbol
  */
 function emitAsNamespace(name, moduleSymbol) {
-    assert(moduleSymbol.flags & ts.SymbolFlags.ValueModule, "moduleSymbol is not a module");
+    assert(moduleSymbol.flags & ts.SymbolFlags.ValueModule, `moduleSymbol '${moduleSymbol.name}' is not a module, was a ${ts.Debug.formatSymbolFlags(moduleSymbol.flags)} instead`);
 
     scopeStack.push(new Map());
     const currentScope = scopeStack[scopeStack.length - 1];