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Juan Garibay
fc6fe5e5df
The Python block gates on `command -v pytest`, so it only runs when pytest is
on PATH. Installing a project's tools into a virtualenv is the norm rather
than the exception, so in practice the hook printed
[ECC pre-push] Python project detected but pytest is not installed. Skipping.
while standing in a directory with `.venv/bin/pytest` in it, and pushed.
The failure mode is worse than not having the hook. A skip line reads like a
pass: the push succeeds, the output looks healthy, and nothing indicates the
gate declined to gate. A repository can sit behind it for months believing
its tests run on every push. Found on a project with 893 tests, none of which
the hook had ever executed.
`resolve_pytest` now looks, in order, at `ECC_PYTEST_CMD`, `$VIRTUAL_ENV`,
`.venv`, `venv`, `env`, `uv run` when a `uv.lock` is present, `poetry run`
when a `poetry.lock` is, and finally PATH. Each candidate is confirmed by
importing pytest rather than by the path existing, so a half-built venv falls
through to the next one instead of failing the push.
Two deliberate choices:
The log line names the command it resolved -- `Running: .venv/bin/python -m
pytest -q` -- so which interpreter ran is visible in the push output rather
than inferred. When nothing resolves, the message says where it looked and
names `ECC_PYTEST_CMD`, instead of asserting pytest is not installed when it
may well be.
`uv run` passes `--no-sync` so the hook cannot mutate the developer's
environment on its way to running the tests.
Behaviour change worth flagging for the release note: on any Python project
with a working virtualenv this hook now actually runs the suite, and will
block a push whose tests fail. That is the intent, but it is new behaviour
for every such repository, and `ECC_SKIP_PREPUSH=1` remains the escape.
Verified on two real repositories: a uv/venv Python project (resolves
`.venv/bin/python -m pytest`, 893 tests, exits 0; exits 1 when the suite
fails) and a Node project (unchanged, still runs lint/typecheck/test/build).