mirror of
https://github.com/kuhyx/testsAndMisc.git
synced 2026-11-13 18:30:47 +01:00
Krzysztof Rudnicki
8e24ff093f
On 2026-07-30 a kernel upgrade left the machine in systemd emergency mode on three consecutive boots. The upgrade replaced /usr/lib/modules/<old> with <new>, but the new kernel never reached the ESP, so the firmware kept booting the OLD vmlinuz whose module tree had just been deleted. Nothing modular could load after pivot-root — including vfat, which meant /boot itself could not be mounted, local-fs.target failed, and systemd dropped to an emergency shell. pacman reported the transaction as successful. Root cause: pacman-git with ParallelDownloads > 1 segfaults every forked alpm hook child, silently skipping 90-mkinitcpio-install and depmod. boot-repair is self-contained (no repo libs — it must run in the emergency shell) and fully offline (missing modules are recovered from /var/cache/pacman/pkg). It repairs by default; --dry-run inspects. It detects and fixes: read-only root, noauto/nofail fstab drift, orphaned kernel files shadowing an unmounted ESP, unloadable vfat, unmounted ESP, missing modules.dep, ESP kernel != installed tree, stale initramfs, and ParallelDownloads > 1. Two pacman hooks make the failure impossible rather than merely recoverable: 05-boot-mounted-guard aborts a kernel transaction when the ESP is unmounted (AbortOnFail), and 99-boot-autorepair fixes ESP drift after the transaction, before the machine is ever rebooted. Safety: a module tree counts as usable only if it has BOTH vmlinuz and kernel/, so the metadata-only wreckage this bug leaves — which sorts newer — is never chosen as the target. Files under /boot are deleted only while it is not a mountpoint AND contains no EFI/ or loader/; deleting after mounting would destroy the real kernel. Verified: - 31/31 fixture tests (--root against throwaway trees, no privileges) - 11/11 reversible live tests on the real machine: unmounted the real ESP, planted shadow files, confirmed they were deleted and the ESP then mounted with EFI/, loader/ and kernel 7.1.5-arch1-2 intact - Gate proven against a real transaction with the ESP unmounted: "failed to commit transaction", no packages upgraded, nothing written - shellcheck + shfmt clean, pre-commit passing Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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| .github | ||
| .hippo | ||
| .vscode | ||
| bucket_catch | ||
| docs | ||
| kcd2_dice_solver | ||
| linux_configuration | ||
| meta | ||
| phone_focus_mode | ||
| python_pkg | ||
| third_party/agent-skills | ||
| .copilotignore | ||
| .fvmrc | ||
| .gitignore | ||
| .pre-commit-config.yaml | ||
| .prettierignore | ||
| CLAUDE.md | ||
| DESIGN_AUDIT_TODO.md | ||
| lint_python.sh | ||
| pyproject.toml | ||
| README.md | ||
| requirements.txt | ||
| run.sh | ||
testsAndMisc
A collection of personal projects, scripts, and experiments — from a GPS-based phone focus tool to Linux/Arch automation, with CI, linting, and pre-commit hooks across the board.
Highlights
Phone Focus Mode
Location-based app restriction for rooted Android. Automatically disables non-whitelisted apps within 500 m of home using ADB + Magisk. Features Haversine distance calculation, hysteresis to prevent toggling, fail-safe unlock, and state persistence. Bash, Android ADB.
Linux Configuration
Automated Arch Linux setup: fresh-install scripts, i3 window manager config, LaTeX environment, and system tests. Includes documentation and test result logging.
Scripts
Utility scripts for development workflows — build file validation, secret detection, and custom makepkg helpers.
Repository Layout
| Path | Description |
|---|---|
python_pkg/ |
Python packages (each maintained subpackage lives here) |
linux_configuration/ |
Arch Linux setup, i3 config, system maintenance scripts |
phone_focus_mode/ |
GPS-based Android focus enforcer |
scripts/ |
Workspace-level helper scripts and pre-commit hooks |
docs/ |
Reference docs and historical reports |
third_party/ |
Vendored upstream skills/agents |
meta/ |
Repo-wide tooling: pyproject.toml, requirements.txt, .pre-commit-config.yaml, run.sh, lint_python.sh, .fvmrc. Symlinked into the repo root so tools that auto-discover from root keep working. |
Archived / unmaintained projects live in the sibling repository
testsAndMisc-archive.
Tooling
- Python linting: Ruff with all rules enabled (see
meta/pyproject.toml) - Dependencies:
pip install -r meta/requirements.txt(combined runtime + dev) - CI: GitHub Actions — lint, build, and test on push
- Testing: pytest (Python), custom shell-based test harness for scripts