#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""test_gate_decoys.py — can this gate be fooled by a LABEL? (R-421)
The controller half of the decoy sweep. Rationale, and the four failure shapes it hunts, are in
`felhom.eu/scripts/test_gate_decoys.py` and `documentation/audits/AUDIT-gate-decoys-2026-09-01.md`.
TWO HOLES THIS FILE PINS, both measured on 2026-09-01 and both fixed the same day:
* **Six gates decided their SCOPE with `os.listdir`**, one directory level. No template
subdirectory existed, so every one was green and correct — and would have stayed green the
moment anyone added `templates/partials/`, which is an ordinary act. `mojibake` and `docker-v`
already used `os.walk` and caught the same planted file, which is the control that proved the
cause was the listing and not the decoy.
* **`debug-routes` and `app-row-dedup` matched text inside COMMENTS.** A dispatcher case left in a
commented-out block counted as a live handler — which is R-400's original defect reached through
the one door its own gate could not see.
Run from `controller/`: python3 scripts/test_gate_decoys.py
Exit 0 all decoys rejected · 1 a decoy passed.
"""
import io
import os
import re
import subprocess
import sys
HERE = os.path.dirname(os.path.abspath(__file__))
CTRL = os.path.dirname(HERE)
TPL = os.path.join(CTRL, "internal", "web", "templates")
SUB = os.path.join(TPL, "partials")
# ── WHAT THIS FILE COVERS ────────────────────────────────────────────────────────────────────────
# AST-parsed by felhom.eu/scripts/decoy_coverage_gate.py. See that file for why it is a declaration
# and not a grep.
COVERS = {
"emoji": "an emoji in templates/partials/ (scope was os.listdir)",
"native-confirm": "a native confirm() in templates/partials/",
"app-row-dedup": "hand-rolled row markup in partials/, AND a commented-out partial call",
"template-id": "a JS reference to a missing id, in partials/",
"secret-markup": "a secret templated into markup, in partials/",
"retrieval-promise": "an unregistered retrieval promise, in partials/",
"mojibake": "CONTROL: already walked; proves the planted file is really reachable",
"debug-routes": "a live dispatcher case commented out - the button survives, the handler dies",
"golden-notice": "R-410 in the other direction: an empty dir must not count as a bake",
}
fails = []
ran = 0
def gate(script):
p = subprocess.run([sys.executable, os.path.join("scripts", script)],
cwd=CTRL, capture_output=True, text=True)
return p.returncode, p.stdout + p.stderr
def in_subdir(name, script, content):
"""Plant a template one directory down and assert the gate still sees it."""
global ran
ran += 1
made = not os.path.isdir(SUB)
if made:
os.makedirs(SUB)
f = os.path.join(SUB, "decoy.html")
io.open(f, "w", encoding="utf-8").write(content)
try:
rc, out = gate(script)
finally:
os.remove(f)
if made and os.path.isdir(SUB) and not os.listdir(SUB):
os.rmdir(SUB)
if rc == 0:
fails.append("%s: a planted template in templates/partials/ PASSED — the gate's scope is a "
"directory listing, not the set of templates (R-421)\n%s" % (name, out[-400:]))
else:
print(" ok %-20s sees templates at any depth" % name)
def swapped(name, script, path, transform, expect="convict"):
global ran
ran += 1
b = io.open(path, encoding="utf-8").read()
try:
io.open(path, "w", encoding="utf-8").write(transform(b))
rc, out = gate(script)
finally:
io.open(path, "w", encoding="utf-8").write(b)
if (rc != 0) != (expect == "convict"):
fails.append("%s: rc=%d, expected %s\n%s" % (name, rc, expect, out[-400:]))
else:
print(" ok %-20s %s" % (name, "decoy rejected" if expect == "convict" else "genuine accepted"))
print("decoys — felhom-controller")
# --- SCOPE: the six listdir gates, each with content that actually triggers it -----------------
in_subdir("emoji", "emoji_gate.py", u"
\n")
# --- CONTROL: two gates already walked. If these ever fail, the decoy is wrong, not the gate ----
in_subdir("mojibake (CONTROL)", "mojibake_gate.py", u"
árvÃztuquotrÅ‘
\n")
# --- COMMENTS ARE NOT CODE (R-421) -------------------------------------------------------------
DISPATCH = os.path.join(CTRL, "internal", "web", "handler_debug.go")
DEBUG_TPL = os.path.join(CTRL, "internal", "web", "templates", "debug.html")
def _comment_out_a_real_case(src):
"""Take a LIVE dispatcher case and comment it out. The button stays; the handler dies."""
m = re.search(r'^(\s*)(case subpath == "[A-Za-z0-9/_-]+".*:)$', src, re.M)
assert m, "no dispatcher case found — the decoy cannot be built"
return src[:m.start()] + m.group(1) + "// " + m.group(2) + src[m.end():]
swapped("debug-routes/comment", "debug_route_gate.py", DISPATCH, _comment_out_a_real_case)
def _comment_out_the_partial(src):
return re.sub(r'(\{\{template "app_list_row".*?\}\})', r'', src)
swapped("app-row-dedup/comment", "app_row_dedup_gate.py",
os.path.join(TPL, "dashboard.html"), _comment_out_the_partial)
# --- golden-notice: R-410's decoy, in the other direction. It is ADVISORY, so rc is never the ---
# --- question — what it COUNTED is. ---
ran += 1
EV = os.path.join(os.path.dirname(os.path.dirname(CTRL)), "felhom.eu", "documentation", "tests",
"golden-9.9.9-2026-01-01")
if os.path.isdir(os.path.dirname(EV)):
os.makedirs(EV)
try:
p = subprocess.run([sys.executable, os.path.join("scripts", "golden_notice.py"),
os.path.dirname(CTRL)], cwd=CTRL, capture_output=True, text=True)
out = p.stdout + p.stderr
finally:
os.rmdir(EV)
if "9.9.9" in out and "NOT counted" not in out:
fails.append("golden-notice: an EMPTY directory was counted as a bake (R-410 regressed)")
else:
print(" ok %-20s empty dir not counted as a bake" % "golden-notice")
else:
print(" -- %-20s SKIPPED: no felhom.eu sibling clone" % "golden-notice")
print()
if fails:
for f in fails:
print("FAIL: %s" % f)
sys.exit(1)
print("all %d controller decoys behaved — labels do not satisfy these gates" % ran)