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apk decides whether to upgrade from the version string alone. Three recipes
pin an upstream version -- anvil-moonraker on ${MOONRAKER_VERSION#v},
anvil-klipper on the pinned commit, anvil-helixscreen on its tag -- and each
ships a payload/ of ours beside that upstream tree. Our half changes without
the string moving, so the feed serves new bytes under the name every printer
already holds and `apk upgrade` finds nothing to do. #16 did exactly that to
moonraker.conf, the file that moves Moonraker's config to
/usr/data/anvil-data/config.
PKG_RELEASE is that string's other half, and it is the release date now:
pkg_release_stamp, monotone, with the same-day letter as a trailing digit so
20260827b sorts between 20260827 and 20260828. Nobody has to notice that a
payload changed, which is the only version of this that holds.
PKG_STAMP_EXTRA="$(pkg_payload_hash)" is not this and reads as though it were.
It hashes payload/ so the BUILD rebuilds; it says nothing to a printer. All
three recipes had it, and all three would have shipped stale.
test_recipe_layout.py makes it the rule for recipes added later: a pinned
recipe with a payload/ must take pkg_release_stamp, and the failure names the
recipe and the line to write.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>