bearhub/NAMESPACE_MIGRATION.md

Namespace Migration (bauh -> bearhub)

This document defines the technical migration strategy for moving the Python package namespace from bauh to bearhub safely.

Last updated: 2026-06-27 (M3 merged on GitHub main; Phase D partial; release tag pending).

Current State

Area	Status
Project identity	bearhub (PyPI name, binaries, AUR, docs, desktop files)
Version source	bearhub/__init__.py (pyproject.toml → bearhub.__version__)
Entry points	Flipped — bearhub, bearhub-tray, bearhub-cli target bearhub.*
Runtime implementation	Native under bearhub/ — api/*, commons/*, gems/*, view/*, app shell, CLI
Legacy bauh/ tree	Compatibility re-export shims only (+ bauh/view/resources/ fallback data)
gems/ backends	AppImage, Flatpak, Web, Arch/AUR — all under bearhub/gems/
Gem loader	Native bearhub/view/core/gems.py (dual-root scan + import fallback)
Tests	159 unit tests, all passing (CI: Python 3.11, 3.12)
Compatibility shims	bauh/* re-exports bearhub.*; on main, documented in CHANGELOG.md [Unreleased]
GitHub main vs release tag	Migration on main; latest tag 0.10.7-bearhub.6 is behind main
AUR stable	0.10.7-11 builds tarball from tag 0.10.7-bearhub.6 until next release

Progress Overview (~95 % of M3 — Phase B complete, Phase D in progress)

Phase A  [████████████████████] 100 %  skeleton + wrappers
Phase B  [████████████████████] 100 %  all runtime modules native under `bearhub/` (shims in `bauh/`)
Phase C  [████████████████████] 100 %  entry points on bearhub.*
Phase D  [██████████░░░░░░░░░░]  50 %  version flip done; full shim removal after stable release

Native vs Shim Modules

Native (implemented in bearhub/):

• App shell: app_main.py, manage.py, tray.py, context.py, stylesheet.py, app_args.py, app.py
• CLI: cli/*
• api/*, commons/*, gems/*
• view/util/*, view/core/*, view/qt/*
• view/util/resource.py prefers bearhub/view/resources, falls back to bauh/view/resources

Legacy bauh/ tree (compatibility shims only):

• bauh/api/*, bauh/commons/*, bauh/gems/*, bauh/view/* — all re-export from bearhub.*
• bauh/app.py, bauh/stylesheet.py, bauh/context.py (partial) — thin redirects to bearhub

Still only in bauh/ (shim-only, pending removal):

• bauh/__init__.py, bauh/stylesheet.py, bauh/app*.py, bauh/context.py, bauh/manage.py, bauh/tray.py
• bauh/api/*, bauh/commons/*, bauh/gems/*, bauh/view/* — re-export shims
• bauh/view/resources/ — legacy resource fallback (still in MANIFEST.in)

Dead upstream backends (only __pycache__ left, no .py sources):

• bauh/gems/debian/, bauh/gems/snap/ — skip migration; remove cache dirs during M4 cleanup.

Migration Goals

• Make bearhub the canonical Python namespace.
• Keep temporary compatibility for legacy bauh imports.
• Avoid breaking AUR/PyPI/runtime while migration is in progress.
• Complete gems/ migration before starting M6 (Qt6) to avoid dual refactors.

Phase Plan

Phase A: Introduce target namespace skeleton — DONE

• Add bearhub/ package wrappers that delegate to bauh/.
• Add native resource tree at bearhub/view/resources/.
• Add desktop integration under bearhub/desktop/.
• Keep behavior unchanged during wrapper phase.

Phase B: Move core modules — DONE

Original order (adjusted based on actual progress):

Step	Module group	Status	Notes
B.1	CLI + app entry	Done	bearhub/app_main.py, cli/app_main.py, manage.py, tray.py
B.2	context, stylesheet, view/core/config, view/util/resource	Done	Native implementations
B.3	api, commons	Done	Native under bearhub/; bauh/api + bauh/commons are shims
B.4	view/util	Done	Native under bearhub/view/util/; bauh/view/util are shims
B.5	view/core	Done	Native under bearhub/view/core/; bauh/view/core are shims
B.6	view/qt	Done	Native under bearhub/view/qt/; bauh/view/qt are shims
B.7	gems/	Done	G.1–G.4 complete

Rules (unchanged):

• Move one group at a time.
• After each move, keep compatibility imports in bauh/.
• Run smoke test after every slice: start, search, install, uninstall, update.
• One release per backend migration slice is acceptable (0.10.7-bearhub.N).

Phase C: Flip entry points — DONE

# pyproject.toml / setup.py
bearhub = "bearhub.app:main"
bearhub-tray = "bearhub.app:tray"
bearhub-cli = "bearhub.cli.app:main"

Legacy redirect: bauh/app.py re-exports from bearhub.app_main.

Compatibility window: keep bauh import path until Phase D (target: one stable release after full Phase B).

Phase D: Remove legacy compatibility — IN PROGRESS

Prerequisites:

• All Phase B groups moved (no from bauh in bearhub/ runtime paths).
• One stable release cycle (bearhub + bearhub-git) without namespace regressions.
• Changelog documents shim removal.

Completed (2026-06-27):

1. __version__ / __app_name__ canonical in bearhub/__init__.py
2. bauh/__init__.py → shim re-exporting from bearhub
3. bauh/stylesheet.py → shim re-exporting from bearhub.stylesheet
4. pyproject.toml → version = {attr = "bearhub.__version__"}
5. setup.py → APP_PACKAGE = 'bearhub', package_data only under bearhub
6. Tests: tests/test_namespace_phase_d.py

Remaining (after one stable release):

1. Delete bauh/* compatibility re-export shims (or reduce to minimal stub package).
2. Remove legacy bauh/view/resources from MANIFEST.in once fallback is no longer needed.
3. Remove provides=('bauh') from AUR after deprecation window.
4. Drop bauh package from find_packages / wheel entirely.

Target full removal: earliest 0.10.8 stable (after validated release on current shims).

---

Gems Migration Plan — DONE (G.1–G.4)

All active gem backends now live under bearhub/gems/. The native loader at bearhub/view/core/gems.py:

1. Scans {ROOT_DIR}/gems where ROOT_DIR comes from bearhub.
2. Imports bearhub.gems.{name}.controller (with bauh.gems.* fallback during the shim window).
3. Loads per-gem locale files from {gem}/resources/locale.
4. Uses FORBIDDEN_GEMS_FILE = f'/etc/{__app_name__}/gems.forbidden' with bearhub.__app_name__.

bauh/view/core/gems.py is a compatibility shim only. See slice notes below for historical move order.

Recommended migration order

Migrate smallest / best-tested backends first; leave Arch (largest, most critical) for last.

PR	Backend	Files	Tests	Risk	Rationale
G.1	Loader + AppImage	10 + gems.py	4 tests	Low	Done — smallest backend; validates loader changes
G.2	Flatpak	10	11 tests	Low–medium	Done — good test coverage; no pacman coupling
G.3	Web	12	14 tests	Medium	Done — optional deps (lxml, bs4); node/nativefier paths
G.4	Arch/AUR	28	67 tests	High	Done — primary backend; most internal cross-imports

Per-slice checklist (repeat for G.1–G.4)

1. Move source tree

git mv bauh/gems/<backend> bearhub/gems/<backend>

2. Update imports inside moved files

Replace namespace references:

bauh.gems.<backend>     →  bearhub.gems.<backend>
bauh.api.*              →  bearhub.api.*      (or keep bauh.* via wrappers during transition)
bauh.commons.*          →  bearhub.commons.*
bauh.view.util.*        →  bearhub.view.util.*
from bauh import ...    →  from bearhub import ...

3. Add compatibility shims in bauh/gems/<backend>/

# bauh/gems/<backend>/__init__.py  (and per-module stubs as needed)
from bearhub.gems.<backend> import *  # noqa: F401,F403

4. Update gem loader (G.1 only, then verify each slice)

Native bearhub/view/core/gems.py must:

• Import ROOT_DIR from bearhub (not bauh).
• Scan os.path.join(ROOT_DIR, 'gems').
• Import bearhub.gems.{name}.controller (with fallback to bauh.gems.{name}.controller during transition if needed).
• Keep FORBIDDEN_GEMS_FILE = f'/etc/{__app_name__}/gems.forbidden' using bearhub.__app_name__.

5. Update packaging metadata

In pyproject.toml and setup.py, add/update:

"bearhub": [
    ...
    "gems/*/resources/img/*",
    "gems/*/resources/locale/*",
]

6. Update tests

Prefer from bearhub.gems.<backend>... in test imports. Keep one compatibility test per backend verifying import bauh.gems.<backend> still works until Phase D.

7. Verify

python -m unittest discover -s tests -p "test_*.py" -v
bearhub-cli --version
bearhub --help          # offscreen if no display

G.1 detailed steps (first slice) — DONE

Completed 2026-06-27.

Moved: bauh/gems/appimage/ → bearhub/gems/appimage/ (resources included)

Rewritten natively:

• bearhub/view/core/gems.py — scans bearhub/gems/ first, falls back to bauh/gems/; imports bearhub.gems.*.controller with bauh.* fallback
• bauh/view/core/gems.py — compatibility shim → bearhub.view.core.gems

Compatibility shims added:

• bauh/gems/appimage/*.py → re-export from bearhub.gems.appimage.*
• Extra bearhub/api/abstract/* and bearhub/commons/* wrappers required by AppImage imports

Tests: tests/gems/appimage/test_util.py (canonical import), tests/gems/appimage/test_namespace.py (compat + loader)

Result: AppImage canonical under bearhub/gems/appimage/; loader established for subsequent backends.

G.2 detailed steps (second slice) — DONE

Completed 2026-06-27.

Moved: bauh/gems/flatpak/ → bearhub/gems/flatpak/ (resources included)

Compatibility shims: bauh/gems/flatpak/*.py → re-export from bearhub.gems.flatpak.*

Additional wrappers: bearhub/api/exception.py, bearhub/api/abstract/cache.py, bearhub/commons/suggestions.py, bearhub/commons/util.py

Tests: flatpak tests switched to bearhub.* imports; tests/gems/flatpak/test_namespace.py added

Result: Flatpak canonical under bearhub/gems/flatpak/.

G.3 detailed steps (third slice) — DONE

Completed 2026-06-27.

Moved: bauh/gems/web/ → bearhub/gems/web/ (resources included)

Compatibility shims: bauh/gems/web/*.py → re-export from bearhub.gems.web.*

Additional wrappers: bearhub/api/abstract/download.py, bearhub/commons/view_utils.py

Tests: web tests switched to bearhub.* imports/patch targets; tests/gems/web/test_namespace.py added

Result: Web canonical under bearhub/gems/web/.

G.4 detailed steps (fourth slice) — DONE

Completed 2026-06-27.

Moved: bauh/gems/arch/ → bearhub/gems/arch/ (28 Python modules + resources)

Compatibility shims: bauh/gems/arch/*.py → re-export from bearhub.gems.arch.*

Additional wrappers: bearhub/commons/category.py

Tests: all tests/gems/arch/* switched to bearhub.* imports/patch targets; tests/gems/arch/test_namespace.py added

Result: All active gem backends canonical under bearhub/gems/ (Phase B.7 complete).

B.3/B.4 slice: native api/ + commons/ — DONE

Completed 2026-06-27.

Moved: bauh/api/ → bearhub/api/ (14 modules), bauh/commons/ → bearhub/commons/ (15 modules)

Compatibility shims: bauh/api/*.py, bauh/commons/*.py → re-export from bearhub.*

Tests: tests/common/*, tests/api/abstract/* switched to bearhub.*; tests/api/test_namespace.py added

Result: bearhub.api and bearhub.commons are canonical.

B.4 slice: native view/util/ — DONE

Completed 2026-06-27.

Moved: bauh/view/util/{cache,disk,logs,translation,util}.py → bearhub/view/util/

Kept native: bearhub/view/util/resource.py (Bearhub-first resource resolver with bauh fallback)

Compatibility shims: bauh/view/util/*.py → re-export from bearhub.view.util.*

Tests: tests/view/util/test_namespace.py added

Result: bearhub.view.util is canonical (resource.py Bearhub-first with bauh fallback).

B.5 slice: native view/core/ — DONE

Completed 2026-06-27.

Moved: bauh/view/core/{controller,downloader,settings,suggestions,timeshift,tray_client,update}.py → bearhub/view/core/

Already native: config.py, gems.py

Compatibility shims: bauh/view/core/*.py → re-export from bearhub.view.core.*

Tests: tests/view/core/test_namespace.py added

Result: bearhub.view.core is canonical (except config/gems, already native).

B.6 slice: native view/qt/ — DONE

Completed 2026-06-27.

Moved: all 18 modules from bauh/view/qt/ → bearhub/view/qt/

Key import updates: bearhub.context, bearhub.stylesheet, bearhub.view.core/*, bearhub.view.util/*

Compatibility shims: bauh/view/qt/*.py → re-export from bearhub.view.qt.*

Tests: tests/view/qt/test_namespace.py added

Result: Phase B complete — all runtime logic is native under bearhub/. Remaining M3 work is Phase D (shim removal after one stable release).

G.4 Arch-specific notes

Arch has the most cross-module imports (~31 files) and the most tests. Additional care:

• worker.py has a lazy import of ArchManager — preserve pattern.
• CUSTOM_MAKEPKG_FILE, ARCH_CONFIG_DIR, pacman integration — smoke-test install/uninstall on a real Arch system or VM.
• Locale files under gems/arch/resources/locale/ must ship in package_data.
• Run full arch test suite: python -m unittest discover -s tests/gems/arch -v.

Phase B completion summary

Phase B (B.1–B.7) is complete as of 2026-06-27. All runtime modules are native under bearhub/; bauh/ holds re-export shims only.

Next (Phase D): ship one stable release on current shims, then remove bauh/* compatibility tree per checklist above. Do not start M6 (Qt6) until M3 is tagged and stable — see docs/qt6-migration.md.

---

Compatibility Policy

During migration, both imports should work:

import bearhub
import bauh          # temporary — deprecated

• bearhub is canonical for all new code and entry points.
• bauh is a compatibility path only; do not add new bauh imports.
• bearhub/__init__.py currently delegates __version__ to bauh — fix in Phase D.
• User config/cache paths use __app_name__ (bearhub); legacy bauh dirs are auto-migrated via bauh/api/paths.py.

Verification Checklist

Run after every migration slice:

• python -m unittest discover -s tests -p "test_*.py" passes
• python -m py_compile on changed modules
• bearhub --version prints expected version
• bearhub-cli --help works
• GUI smoke test (if display available): start → search → list installed apps
• Backend-specific smoke test for migrated gem (install/uninstall dry-run or test env)
• pip install -e . succeeds
• AUR bearhub and bearhub-git PKGBUILDs build (maintainer check)
• No new user-facing bauh labels in changed UI paths
• Changelog entry under [Unreleased] or next bearhub.N tag

Related Documents

• ROADMAP.md — milestones M1–M6 (M1 identity/branding still open)
• docs/qt6-migration.md — Qt6 inventory under bearhub/view/qt/* and bearhub/view/core/*
• CHANGELOG.md — [Unreleased] on main (Phase B + partial Phase D); tagged 0.10.7-bearhub.4 … .6
• packaging/aur/README.md — AUR publish workflow (GitHub ≠ AUR)
• AGENTS.md — local AI/maintainer handoff (gitignored, not on GitHub)