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fix(producer): shim CJS __dirname / __filename in ESM banner #1445

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ukimsanov wants to merge 1 commit into from
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fix(producer): shim CJS __dirname / __filename in ESM banner #1445

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14 changes: 9 additions & 5 deletions packages/producer/build.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -15,12 +15,16 @@ mkdirSync("dist", { recursive: true });

const scriptDir = dirname(fileURLToPath(import.meta.url));

// The banner provides a real `require` function via createRequire so that
// esbuild's CJS interop (__require) works correctly in ESM output.
// Without this, bundled CJS deps (recast, yauzl, etc.) that call
// require("fs") throw "Dynamic require of 'fs' is not supported".
// Shim `require` + `__dirname` / `__filename` for bundled CJS deps that expect them in ESM scope.
const cjsBanner = {
js: "import { createRequire as __cjsRequire } from 'module'; const require = __cjsRequire(import.meta.url);",
js: [
"import { createRequire as __cjsRequire } from 'module';",
"import { fileURLToPath as __fileURLToPath } from 'url';",
"import { dirname as __pathDirname } from 'path';",
"const require = __cjsRequire(import.meta.url);",
"const __filename = __fileURLToPath(import.meta.url);",
"const __dirname = __pathDirname(__filename);",
].join(" "),
};

const workspaceAliasPlugin = {
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