fix(arborist): use omit when checking ideal tree engine, centralize shouldOmit logic #8372
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owlstronaut
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fixes #8369
fixes #6805
Fix: Skip engine validation for omitted dependencies
Problem
When running
npm install --omit=dev, npm incorrectly validates engine requirements for devDependencies that won't be installed, causing unnecessary install failures. For example, a project with devDependencies requiring Node >=20.6.0 would fail to install on Node 18.x even when using--omit=dev.Solution
Modified Arborist's engine validation to skip checking omitted dependencies. Added a centralized
shouldOmit()method to the Node class and updated#checkEngineAndPlatform()to respect omit flags. Nownpm install --omit=devsucceeds when devDependencies have incompatible engine requirements, while still validating engines for dependencies that will actually be installed.Changes
lib/node.js: AddedshouldOmit()method for consistent omit logiclib/arborist/build-ideal-tree.js: Skip engine checks for omitted dependencieslib/arborist/reify.js,lib/audit-report.js: Use centralized omit logic