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kevinveenbirkenbachandClaude Opus 4.7
f722e676ca
Rename the third flag returned by lookup('service', ...) from 'needed'
to 'required' across code, tests and design docs. Same semantics: True
when some deployed app has the service with both enabled: true AND
shared: true, directly or transitively through its own enabled service
dependencies.
The new name reads as a contract ("this service is required by a real
consumer") rather than a suggestion ("something needs it"), which
matches the stricter-than-enabled semantic the flag already carries.
Touchpoints:
- plugins/lookup/service.py: _is_service_needed → _is_service_required,
any_needed var, dict key in _compute_flags, docstring rationale.
- roles/sys-utils-service-loader/tasks/main.yml: caller switched to
.required.
- roles/web-app-wordpress/config/main.yml + tasks/plugins/wp-discourse.yml:
wp-discourse plugin gate uses lookup('service', 'discourse').required;
compose.services.discourse declared as shared-service dependency so
the service loader auto-loads web-app-discourse when inventory sets
enabled: true. The legacy include_tasks: utils/load_app.yml in
plugins/wp-discourse.yml is removed — the service loader now handles
it.
- tests/unit/plugins/lookup/test_service.py: 25 assertions and 6 test
method names renamed (test_needed_* → test_required_*,
test_transitive_needed_resolved,
test_direct_provider_is_not_needed_without_shared_flag).
- tests/integration/services/test_transitive_dependencies.py: one
assertion renamed.
- docs/contributing/design/services/base.md: Lookup-Plugins section
replaces the 'needed' bullet with an expanded 'required' entry that
documents when consumers should gate on it and why plain enabled is
not enough.
Also moves wordpress-app-specific keys (title, max_upload_size,
plugins) under compose.services.wordpress to match the convention
the other role keys already follow, and updates vars/main.yml lookup
paths accordingly.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Design 🎨
This directory contains contributor guidance for code design and implementation. Its scope is architecture, service wiring, coding principles, exceptions, and the boundaries that shape maintainable changes.