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fix: support Vite plugins adding a server entry #14351

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fix: support Vite plugins adding a server entry #14351

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fix: support Vite plugins adding a server entry
brillout Sep 18, 2025
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brillout Sep 18, 2025
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1 change: 1 addition & 0 deletions contributors.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,7 @@
- briankb
- BrianT1414
- Bricklou
- brillout
- brockross
- brookslybrand
- brophdawg11
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7 changes: 6 additions & 1 deletion packages/react-router-dev/vite/plugin.ts
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Expand Up @@ -3540,7 +3540,12 @@ export async function getEnvironmentOptionsResolvers(
: viteUserConfig.build?.rollupOptions?.input) ??
virtual.serverBuild.id,
output: {
entryFileNames: serverBuildFile,
entryFileNames({ name }) {
return name === "virtual_react-router/server-build"
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@pcattori pcattori Sep 18, 2025 •
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For onlookers: our server build virtual module (virtual:react-router/server-build) gets sanitized via Rollup's sanitizeFilename which replaces the : with _

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Looks like some tests are failing because the name ends up being server-build rather than virtual_react-router/server-build

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@pcattori pcattori Sep 18, 2025 •
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@brillout was virtual_react-router/server-build working for you? I just changed it to server-build and now most tests are passing for me locally. Trying to figure out when we should expect virtual_react-router/server-build vs just `server-build.

Suggested change
return name === "virtual_react-router/server-build"
return name === "server-build"

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Yes, in the reproduction I linked to, the name is virtual_react-router/server-build. Maybe name === "server-build" || name === "virtual_react-router/server-build" or name.endsWith("server-build") then?

Btw. I guess this change should also be applied to other entryFileNames usage. I just did the minimal amount of changes to fix the reproduction. (I'm inclined to think it's better the React Router team takes over the PR.)

? serverBuildFile
: // Rollup's default
"[name].js";
},
format: serverModuleFormat,
},
},
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