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fix: detect Turbopack builds and set TURBOPACK env accordingly #1056

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fix: detect Turbopack builds and set TURBOPACK env accordingly #1056

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24 changes: 20 additions & 4 deletions packages/open-next/src/build/patch/patches/patchEnvVar.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import { createPatchCode } from "../astCodePatcher.js";
import type { CodePatcher } from "../codePatcher";
import { createPatchCode, patchCode } from "../astCodePatcher.js";
import type { CodePatcher, PatchCodeFn } from "../codePatcher.js";

/**
* Creates a rule to replace `process.env.${envVar}` by `value` in the condition of if statements
Expand All @@ -21,6 +21,22 @@ fix:
'${value}'
`;

function isTurbopackBuild(tracedFiles: string[]): boolean {
const hasTurboRuntime = tracedFiles.some((file) =>
/-turbo[.-].*\.runtime\.(prod|dev)\.js$/.test(file),
);
const hasNonTurboRuntime = tracedFiles.some(
(file) =>
/\.runtime\.(prod|dev)\.js$/.test(file) && !/-turbo[.-]/.test(file),
);
return hasTurboRuntime && !hasNonTurboRuntime;
}

const createTurbopackPatch: PatchCodeFn = async ({ code, tracedFiles }) => {
const value = isTurbopackBuild(tracedFiles) ? "true" : "false";
return patchCode(code, envVarRuleCreator("TURBOPACK", value));
};

export const patchEnvVars: CodePatcher = {
name: "patch-env-vars",
patches: [
Expand All @@ -39,12 +55,12 @@ export const patchEnvVars: CodePatcher = {
contentFilter: /process\.env\.NODE_ENV/,
patchCode: createPatchCode(envVarRuleCreator("NODE_ENV", '"production"')),
},
// This patch will set `TURBOPACK` env to false to avoid loading turbopack related deps at runtime
// Turbopack builds only include *-turbo.runtime.prod.js files, so we detect and set accordingly
{
versions: ">=15.0.0",
pathFilter: /module\.compiled\.js$/,
contentFilter: /process\.env\.TURBOPACK/,
patchCode: createPatchCode(envVarRuleCreator("TURBOPACK", "false")),
patchCode: createTurbopackPatch,
},
],
};
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