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fix(nextjs): handle missing varlock binary on serverless platforms #651

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Merged
theoephraim merged 1 commit into from
Apr 23, 2026
+14 −6
Merged

fix(nextjs): handle missing varlock binary on serverless platforms #651

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5 changes: 5 additions & 0 deletions .bumpy/fix-nextjs-vercel-584.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@varlock/nextjs-integration": patch
---

bundle varlock into next-env-compat and skip CLI exec at runtime on serverless platforms
15 changes: 9 additions & 6 deletions packages/integrations/nextjs/src/next-env-compat.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -329,9 +329,9 @@ export function loadEnvConfig(
const cleanEnv = { ...initialEnv };
delete cleanEnv.DEBUG_VARLOCK;
const varlockLoadedEnvStr = execSyncVarlock(`load --format json-full --env ${envFromNextCommand}`, {
showLogsOnError: true,
// Never use exitOnError here — we handle all error cases in the catch block
// below, including the "binary not found" case on serverless platforms.
// We handle all error display and exit logic ourselves in the catch block
// so we can silently defer on serverless platforms where the binary is missing.
showLogsOnError: false,
exitOnError: false,
env: cleanEnv as any,
});
Expand Down Expand Up @@ -362,10 +362,13 @@ export function loadEnvConfig(
process.exit(1);
}

// showLogsOnError already printed the formatted CLI output above,
// so we only add a short note here (err.message duplicates stderr)
// eslint-disable-next-line no-console
// For real errors (validation failures, etc.) show the CLI output
/* eslint-disable no-console */
const errAny = err as any;
if (errAny.stdout) console.log(errAny.stdout.toString());
if (errAny.stderr) console.error(errAny.stderr.toString());
console.error('[varlock] ⚠️ failed to load env — see error above');
/* eslint-enable no-console */

// In a build, we want to fail hard so broken env doesn't get deployed
if (!dev) {
Expand Down
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