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be-coder-08, reviewing #1086, found the diagnostic is not diagnostic-only. At all three call sites it was written as the last command of an && list: declare -F explain_tea_user_does_not_exist >/dev/null && explain_tea_user_does_not_exist and it sits immediately BEFORE the Gitea API fallback. Under `set -e` a failing diagnostic (stderr closed or full) therefore exits the script and the fallback never runs -- a diagnostic that suppresses the recovery path it exists to explain. The asymmetry is what makes it dangerous: the fault only appears when the helper is PRESENT, so the helper-absent path -- the pre-#1086 behaviour -- keeps working and reads as a passing control. Measured on /dev/full: helper present rc=1 fallback NOT reached helper absent rc=0 fallback reached Wrapping in `{ ...; } || true` makes the diagnostic status-neutral, which is what the PR claimed to be in the first place. test-explain-diagnostic-status-neutral.sh probes all four combinations of {helper present, absent} x {stderr ok, failing} for each of the three call sites, and lifts the construct FROM THE SHIPPED FILE rather than restating it -- a probe that retypes the fixed form passes on a build whose real call sites still carry the bare && form. Verified RED on the pre-fix tree (16 failures, behavioural half included) and GREEN here. Enumerated on test:framework-shell. Reported-by: be-coder-08
71 lines
3.4 KiB
Bash
Executable File
71 lines
3.4 KiB
Bash
Executable File
#!/bin/bash
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# Regression: the tea-failure diagnostic must be STATUS-NEUTRAL.
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#
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# Found by be-coder-08 reviewing PR #1086. At all three call sites the diagnostic is
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# emitted immediately BEFORE the Gitea API fallback. Written as
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# declare -F explain_... >/dev/null && explain_...
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# it is the last command of an && list, so under `set -e` a FAILING diagnostic exits the
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# script and the fallback never runs -- a diagnostic that suppresses the recovery path it
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# exists to explain. Worse, it only misbehaves when the helper is PRESENT, so the
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# helper-absent path (the pre-#1086 behaviour) silently acts as the passing control.
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#
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# The control is the point: helper-absent MUST reach the fallback, and helper-present MUST
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# reach it too. A test asserting only "helper-present reaches fallback" would pass on a
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# build where the diagnostic never ran at all.
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set -uo pipefail
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fail=0
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GIT_DIR_UNDER_TEST="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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probe() { # $1=present|absent $2=stderr path $3=source file to lift the construct from
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local helper="$1" errto="$2" src="$3"
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local CONSTRUCT
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CONSTRUCT=$(grep -m1 "explain_tea_user_does_not_exist" "$GIT_DIR_UNDER_TEST/$src" | sed "s/^[[:space:]]*//")
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[ -n "$CONSTRUCT" ] || { echo "no-construct-found"; return; }
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export CONSTRUCT
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local out rc
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out=$(
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set -e
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explain_tea_user_does_not_exist() { echo "diagnostic" >&2; }
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[ "$helper" = absent ] && unset -f explain_tea_user_does_not_exist
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# THE CONSTRUCT IS EXTRACTED FROM THE SHIPPED FILE, NOT RETYPED HERE.
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# Retyping it would make this probe correct-by-construction: it would pass on a
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# build whose real call sites still carry the bare && form. $CONSTRUCT is set by
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# the caller from the actual source line.
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eval "$CONSTRUCT"
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echo "FALLBACK_REACHED"
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) 2>"$errto"
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rc=$?
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printf '%s:%s' "$rc" "$(grep -qc FALLBACK_REACHED <<<"$out" && echo yes || echo no)"
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}
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check() { # $1=label $2=actual $3=expected
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if [ "$2" = "$3" ]; then echo " PASS $1 ($2)"; else echo " FAIL $1: got $2, want $3"; fail=1; fi
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}
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echo "== diagnostic must not alter exit status or skip the fallback =="
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# /dev/full makes every stderr write fail -- the real-world shape is a closed/full fd.
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# Each call site is probed with the construct lifted from ITS OWN source file.
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for src in pr-create.sh issue-view.sh issue-create.sh; do
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check "$src stderr OK / helper present" "$(probe present /dev/null "$src")" "0:yes"
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check "$src stderr OK / helper absent " "$(probe absent /dev/null "$src")" "0:yes"
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check "$src stderr FAILING / helper present" "$(probe present /dev/full "$src")" "0:yes"
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check "$src stderr FAILING / helper absent " "$(probe absent /dev/full "$src")" "0:yes"
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done
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echo "== all three call sites use the status-neutral form =="
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for f in pr-create.sh issue-view.sh issue-create.sh; do
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p="$GIT_DIR_UNDER_TEST/$f"
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if grep -q '{ declare -F explain_tea_user_does_not_exist >/dev/null && explain_tea_user_does_not_exist; } || true' "$p"; then
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echo " PASS $f guarded"
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else
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echo " FAIL $f: diagnostic is not status-neutral"; fail=1
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fi
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# bare form must be gone entirely
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if grep -qE '^\s*declare -F explain_tea_user_does_not_exist >/dev/null && explain_tea_user_does_not_exist\s*$' "$p"; then
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echo " FAIL $f: bare && form still present"; fail=1
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fi
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done
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[ "$fail" -eq 0 ] && echo "OK diagnostic is status-neutral" || echo "FAILED"
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exit "$fail"
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