[RFC] 0017 Incremental Build - #1036
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- determineBuildSignature: add read-only taskUtil parameter, note the specVersion >= 5.0 requirement for custom tasks, correct the fallback description, and demote the watched-file-paths bullet to an open question cross-linked to Watch Mode. - Build Signature: list @ui5/builder and @ui5/fs versions and the aggregated determineBuildSignature contributions as additional inputs. - Server Integration: add a Background Cache Validation subsection covering the explicit post-cycle validation pass and the four operational states (IDLE / BUILDING / VALIDATING / STALE).
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The server concept covered source-change rebuilds but not changes to the files that define the project graph (ui5.yaml/--config, package.json, workspace config, dependency-definition file), which need a fresh graph rather than a rebuild. Add a "Reacting to Project-Definition Changes" section under Server Integration: a Supervisor owns the stable socket and re-creates the serving stack on a settled definition change, building the new stack before tearing down the old one, suspending reader serving on the leading edge, and recovering a degraded server through bounded re-resolve attempts. Add an "Embedding UI5 Middleware in an External Server" section for the serveMiddleware() API that the same assembly/listener separation enables. Note that live-reload clients survive a definition-change swap, and reframe the watch-mode cache-invalidation open questions to separate watching definition files (graph re-resolve) from watching build-signature contributors like tsconfig.json (different cache).
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This is a work in progress and there is ongoing team-internal discussion.
Publishing the current state of discussion and linking the PoC here:
JIRA: CPOUI5FOUNDATION-941