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chore(producer): shim __filename/__dirname in the CJS banner #1553

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Merged
miguel-heygen merged 2 commits into from
Jun 22, 2026
Merged

chore(producer): shim __filename/__dirname in the CJS banner #1553

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cd4308b
chore(producer): shim __filename/__dirname in the CJS banner
miguel-heygen Jun 18, 2026
31fcadf
chore(producer): use a template literal for the CJS banner (review nit)
miguel-heygen Jun 20, 2026
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3 changes: 3 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -144,3 +144,6 @@ hyperframes-bench/
tmp/
# Studio-generated preview thumbnails
.thumbnails/

# Local editor settings
.zed/
18 changes: 13 additions & 5 deletions packages/producer/build.mjs
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Expand Up @@ -15,12 +15,20 @@ 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".
// The banner provides a real `require` (via createRequire) plus the CJS-only
// `__filename`/`__dirname` globals so esbuild's CJS interop works in ESM output.
// Without `require`, bundled CJS deps (recast, yauzl, etc.) that call
// require("fs") throw "Dynamic require of 'fs' is not supported"; without the
// dirname shims, deps like wawoff2 throw "__dirname is not defined in ES module".
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 __cjsFileURLToPath } from 'url';",
"import { dirname as __cjsDirname } from 'path';",
"const require = __cjsRequire(import.meta.url);",
"const __filename = __cjsFileURLToPath(import.meta.url);",
"const __dirname = __cjsDirname(__filename);",
].join(" "),
};

const workspaceAliasPlugin = {
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