"""What this build IS — stamped at image build time, not configurable.

Deliberately separate from `config.py`. Those are operator settings, read from
the environment and meant to be changed. These describe the artifact itself and
are baked in by CI (the `FC_VERSION` / `FC_CHANNEL` build args); an operator
setting them by hand is not a supported thing to do, it is just how a value
gets from the build into the running process.

**Absent rather than empty when unknown.** A locally-built image has no version,
and neither did any image predating the field — one spelling of "cannot say",
which every reader already has to handle, instead of a second one to
special-case (note #3127 §7).

**Why this matters more than it used to.** Milestone 318 stopped publishing
version image tags, so a running instance's self-report is now the *only*
answer to "which build is this?" — there is no registry name left to check it
against. A wrong value here has nothing to contradict it. That is why the UI
renders `unknown` rather than a blank or a plausible default: an empty footer
reads as "no version", which is a different and false claim.

The channel lives BESIDE the version and is never folded into it (rule 149).
A `-dev` suffix would be parsed by the extension's comparator as a segment
worth 0, making every dev build compare equal to every other — issue #2993's
exact failure.
"""

import os

FC_VERSION = os.environ.get("FC_VERSION", "").strip()
FC_CHANNEL = os.environ.get("FC_CHANNEL", "").strip()