[rush] Fix sync-back when dependencies move to devDependencies#5811
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iclanton merged 3 commits intoJun 7, 2026
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'rush update' failed to sync back the corrected pnpm-lock.yaml when a dependency moved to devDependencies because isWorkspaceProjectModifiedAsync would unconditionally fall through to the 'dependencies' section if a package was missing from 'devDependencies'. This fall-through is now gated on the new set regularDependencyNames to support legitimate dual-declarations while correctly detecting when a dependency has been moved out of the 'dependencies' section.
ericprestemon
requested review from
apostolisms,
bmiddha,
dmichon-msft,
iclanton,
jxanthony and
octogonz
as code owners
iclanton
approved these changes
Jun 7, 2026
…ync_2026-05-29-12-00.json Co-authored-by: Ian Clanton-Thuon <iclanton@users.noreply.github.com>
…ync_2026-05-29-12-00.json Co-authored-by: Ian Clanton-Thuon <iclanton@users.noreply.github.com>
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Summary
When a project dependency is moved from
dependenciestodevDependencies,rush updatewould correctly update the temporary lockfile but fail to sync it back tocommon/config/rush/. This left the repository with a stale committed lockfile despite the install appearing to succeed.Details
The root cause was an unconditional fall-through in
isWorkspaceProjectModifiedAsync(the PNPM v8+ logic path). When checking a project'sdevDependencies, if a package was missing from the lockfile'sdevDependenciessection, the code would automatically check thedependenciessection instead.While this fall-through is necessary to support dual-declarations (which PNPM collapses into the
dependenciessection of the lockfile), it was also masking the case where a package had been moved out of the regulardependenciessection entirely.The fix introduces a
regularDependencyNamesset for the project and gates the fall-through on membership in that set. This preserves support for dual-declared packages while correctly identifying a stale lockfile when a package has been moved todevDependencies.How it was tested
PnpmShrinkwrapFile.test.ts.stale-dev-in-dependencies.yamlthat simulates a lockfile where a moved dependency is still incorrectly listed in thedependenciessection.rush-libtest suite to ensure no regressions in other lockfile sync scenarios.