Install missing reader libraries on first start

A freshly flashed device needed manual pip work before the reader would
start. It now checks its dependencies, installs whatever is missing, and
carries on.

- bootstrap.py: import check, pip invocation, and a re-check that does not
  trust pip's exit code alone. Installs nothing when the libraries are
  already present, so a normal start does no network work.
- --wheel-dir installs from local wheels with --no-index, for devices with
  no internet. --no-install-deps opts out entirely.
- Outside a venv pip gets --break-system-packages, which Debian and
  Raspberry Pi OS require before touching the system Python.
- reload_library() re-imports rdm6300 when it was installed at runtime, since
  the module-level import already ran and failed.
- A failed install reports exit 2 and the exact manual command rather than
  raising; stdout is flushed so the explanation is not printed after the
  error when piped.

This commit is contained in:

scheianu

2026-10-01 15:40:56 +03:00

parent 576f22268f

commit eaf3f394fc

8 changed files with 452 additions and 13 deletions

									
										pyproject.toml
									
		+1
		-1
	
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				@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"

				[project]

				name = "rdm-card-reader"

				version = "0.2.0"

				version = "0.3.0"

				description = "RDM6300 / EM4100 RFID card reader: prints card events, or serves them over HTTP so a web app can authenticate a card tap."

				readme = "README.md"

				requires-python = ">=3.8"