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be82958af5
The shell pointed HERMES_PYTHON at the bare pm-pinned interpreter and reached the uv2nix site-packages only through PYTHONPATH. Every consumer that replaces PYTHONPATH (Ink's gateway bootstrap, image attachments, run_tests.sh's env -i) got an interpreter with no dependencies, so 'hermes --tui' in the shell failed with 'No module named ruamel'. devVenv re-homes uv2nix's editable venv onto the pinned interpreter: a real pyvenv.cfg whose home is the lock's python, devPython's site-packages, and console scripts re-shebanged onto it. HERMES_PYTHON, VIRTUAL_ENV, python, pytest and pm are now one interpreter and the shell sets no PYTHONPATH. The shipped package and the shell share one tool list: runtimeDeps takes ripgrep and ffmpeg from pm/lock.json too. Reverts the run_tests.sh PYTHONPATH passthrough, which leaked a caller's PYTHONPATH into every HERMES_PYTHON run. The dev-venv-self-contained check runs the venv under env -i.
41 lines
1.2 KiB
Nix
41 lines
1.2 KiB
Nix
# Nix uses the Python family pinned by PM, not a second version constant.
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{
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lib,
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pkgs,
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}:
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let
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pythonFamily =
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lockfile:
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let
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version = (builtins.fromJSON (builtins.readFile lockfile)).packages.python.version;
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parts = builtins.match "([0-9]+)\\.([0-9]+)(\\..*)?" version;
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in
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if parts == null then
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throw "packages.python.version '${version}' is not a Python <major>.<minor> version — cannot derive the Nix interpreter from it"
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else
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builtins.elemAt parts 0 + "." + builtins.elemAt parts 1;
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# Select pkgs.python3NN by family ("3.14" -> pkgs.python314). A missing
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# lookup throws; there is no default interpreter to fall back to.
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selectPython =
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family: packageSet:
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let
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name = "python" + lib.replaceStrings [ "." ] [ "" ] family;
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interp = packageSet.${name} or null;
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in
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if interp == null then
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throw "package set does not provide ${name}, but pm/lock.json pins Python ${family} — update the nixpkgs input; Nix will not silently substitute another Python"
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else
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interp;
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lockfile = ../pm/lock.json;
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family = pythonFamily lockfile;
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in
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{
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inherit pythonFamily selectPython;
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inherit family;
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interpreter = selectPython family pkgs;
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}
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