palace-util

Small, dependency-light utilities shared across Palace Project Python packages. Lives in the palace.util namespace.

This package exists so that the handful of cross-cutting helpers that every Palace package needs — a common exception hierarchy, timezone-aware datetime handling, a standardized LoggerMixin — can be depended on without pulling in the heavier palace-manager application. Packages that need only these primitives depend on palace-util directly; palace-manager is also just a consumer.

Scope

palace-util sits at the bottom of the Palace dependency graph: other Palace packages depend on palace-util; palace-util depends on no other Palace package.

If a utility is only useful inside the Palace Manager application, it does not belong here — keep it in src/palace/manager/util/. Candidates for palace-util should be:

Reusable outside the manager application (e.g., by other Palace services, CLI tools, or by future extracted packages like palace-opds).
Runtime-dependency-light — stdlib-only is the ideal, and in the rare case a third-party library is justified it must be tiny and widely-used. Consumers of palace-util should be able to add it to their pyproject.toml without materially growing their install footprint.
No intra-Palace dependencies.
Stable enough that the wider ecosystem can rely on it without expecting frequent breaking changes.

Development

This package is a uv workspace member of the main circulation repository. Work on it from the repo root — uv sync picks up all workspace members automatically; tox -e py312-docker runs the full test suite. Tests for this package live at the repository root under tests/palace_util/ (workspace-member tests are kept under the root tests/ tree so they share the repo's pytest fixtures and conftest plugins).

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