sneak f1189a00e3 Enable depguard so a non-test file cannot import test support ...

Test-support code exists to hand a test privileges the program itself
must never have, so it must not be compiled into the shipped binary.
depguard now states that rule: in files that are neither tests nor
inside a package whose directory name ends in test, the denied imports
are refused.

depguard matches an import path against a list of prefixes, so it
cannot be told "any path whose last segment ends in test". A repo's own
test-support packages therefore have to be named one at a time under
deny, by full import path, and the policy paragraph now says that list
is the one part of the vendored copy a repo may extend.

Requested by sneak on
sneak/homoicon#1029 to replace a
per-repository check written as a Go test.

Model: opus-5

2026-09-06 01:23:30 +00:00

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