Binaryen on transform (#2832)

* Expose binaryen instance on transform * Fix invalid import in generated output

Author: mattjohnsonpint

cli/index.d.ts

@@ -240,14 +240,18 @@ export function createMemoryStream(fn?: (chunk: Uint8Array | string) => void): M
 /** Compatible TypeScript compiler options for syntax highlighting etc. */
 export const tscOptions: Record<string,unknown>;
 
-import { Program, Parser, Module } from "../src";
+import binaryen from "../lib/binaryen";
+import { Program, Parser } from "../src";
 
 /** Compiler transform base class. */
 export abstract class Transform {
 
  /** Program reference. */
  readonly program: Program;
 
+ /** Binaryen reference. */
+ readonly binaryen: typeof binaryen;
+
  /** Base directory. */
  readonly baseDir: string;
 
@@ -276,5 +280,5 @@ export abstract class Transform {
  afterInitialize?(program: Program): void | Promise<void>;
 
  /** Called when compilation is complete, before the module is being validated. */
- afterCompile?(module: Module): void | Promise<void>;
+ afterCompile?(module: binaryen.Module): void | Promise<void>;
 }

cli/index.js

@@ -450,6 +450,7 @@ export async function main(argv, options) {
  if (typeof transform === "function") {
  Object.assign(transform.prototype, {
  program,
+ binaryen,
  baseDir,
  stdout,
  stderr,

scripts/build-dts.js

@@ -373,9 +373,13 @@ export function generateCli() {
  prefix,
  stdout,
  resolveModuleImport: ({ importedModuleId, currentModuleId }) => {
- return currentModuleId == "cli/index" && importedModuleId == "../src"
- ? prefix + "/src/index"
- : null;
+ if (currentModuleId == "cli/index" && importedModuleId == "../src")
+ return prefix + "/src/index";
+
+ if (importedModuleId == "binaryen")
+ return "binaryen";
+
+ return null;
  },
  });