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Task cache: no way to exclude a specific env var from env-enumeration fingerprints — inherited OLDPWD thrashes warm hits

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Seit 11.8.2026.

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Beschreibung

pending triage

Summary

When a task's config chain enumerates the environment, cooperative tracking records the enumerated env vars into the task-cache fingerprint — including shell bookkeeping like OLDPWD that has no build meaning. OLDPWD changes with whichever directory the shell cd-ed into the repo from, so an otherwise-identical vp run build warm hit thrashes across shells and entry paths.

Repro sketch

Laravel app built through laravel-vite-plugin (its config chain reads .env and enumerates process.env), driven by vp run build:

  1. vp run --filter ./apps-web/<app> build twice — the second run is a full cache hit.
  2. Re-enter the repo from a different parent directory (so the shell exports a different OLDPWD) and run the same command — cache miss, with the env fingerprint as the only change.

Observed on vite-plus 0.2.2 and unchanged as of 0.2.7 (our pinned version). The v0.2.8 release notes list no related change.

What we tried

We could not find a vp-side config that excludes a specific env var from an enumeration-sourced record: untrackedEnv and negated env patterns (env: ['!OLDPWD']) did not suppress it in our testing (investigated during the same caching work as #1894 / #1774).

Workaround

Our monorepo CLI bootstrap does delete process.env.OLDPWD before spawning any vp subprocess. It works, but it only protects invocations that go through the wrapper — plain vp calls still thrash.

Ask

A first-class way to exclude named env vars from cooperative-tracking fingerprints, the way input globs filter file inputs — e.g. untrackedEnv: ['OLDPWD'] (or env: ['!OLDPWD']) applying to enumeration-sourced records, not just direct reads. A reasonable complement would be default-excluding well-known shell bookkeeping vars (OLDPWD, _, SHLVL) that can never carry build meaning.

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