feat: enrich events by auto-populating user.id#1661
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Generate a stable per-installation UUID and use it as the default `user.id` when the SDK user has no explicit id set. The UUID is persisted in `<db>/installation_id` alongside the DSN public key so that changing DSNs rotates the id, and is stamped onto events at scope-apply time without mutating the user-provided scope. Close: #1324 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Initialize scope->user to an empty object so the null state is reserved for explicit sentry_remove_user(). At event apply, skip user enrichment entirely when scope->user is null (removed). Guard the two sites that previously fell through on is_null(scope->user) against leaking an empty object into events / crash-recovery payloads. Use installation_id as the session distinct_id fallback when user has no explicit id. Drops the previous email/username fallback chain to align with sentry-java/sentry-cocoa and the session spec requirement that did be stable for the session lifetime. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Centralize the "user.id or installation_id" resolution so both the event and session call sites share the same helper. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The helper mutated its user argument, which leaked out through sentry_set_user (caller's value) and sentry__session_sync_user (scope->user). Revert the helper and inline both sites again. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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mujacica
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May 4, 2026
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Generate a stable per-installation UUID and use it as the default
user.idwhen the SDK user has no explicit ID set. The UUID is persisted in<db>/installation_idalongside the DSN public key so that changing DSNs rotates the ID, and is stamped onto events at scope-apply time without mutating the user-provided scope.Sentry uses
user.idto compute the number of users impacted by an issue (distinct from event counts); this gives developers that metric out of the box. DSN scoping keeps it privacy-conscious — the ID is not a stable identity across installations. Matchessentry-android,sentry-cocoa, andsentry-dotnet.Note:
sentry_value_new_user[_n]now preserves an explicit empty-stringidinstead of dropping it; onlyNULLskips the field. This lets the new auto-ID enrichment distinguish "no ID set" vs. "ID explicitly empty".Close: #1324