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modelcontextprotocol--pytho…/.github/actions/conformance/run-client.sh
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

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#!/bin/bash
# Run a client conformance suite, re-verifying unexpected failures solo.
# Concurrent suite runs on a 2-vCPU runner can push scenarios with real-time
# waits past tolerance; solo, a real failure fails again while a contention
# artifact passes. Failures that only reproduce under concurrency are excused.
set -uo pipefail
: "${CONFORMANCE_PKG:?set CONFORMANCE_PKG (pinned in .github/workflows/conformance.yml)}"
# One attempt: a solo failure on the quiet runner disproves the contention
# hypothesis; a second try would be the blind retry this script avoids.
SOLO_ATTEMPTS="${CONFORMANCE_SOLO_ATTEMPTS:-1}"
# Relative args resolve from the repo root; same contract as run-server.sh.
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR/../../.." || exit 1
log="$(mktemp)"
trap 'rm -f "$log"' EXIT
npx --yes "$CONFORMANCE_PKG" client "$@" 2>&1 | tee "$log"
rc=${PIPESTATUS[0]}
if [ "$rc" -eq 0 ]; then
exit 0
fi
plain="$(sed 's/\x1b\[[0-9;]*m//g' "$log")"
# If the harness's summary wording changes, the list comes up empty and the
# original exit code passes through - never a false green.
mapfile -t scenarios < <(
printf '%s\n' "$plain" |
sed -n '/^Unexpected failures (not in baseline):$/,/^$/p' |
sed -n 's/^ ✗ //p'
)
if [ "${#scenarios[@]}" -eq 0 ]; then
exit "$rc"
fi
for scenario in "${scenarios[@]}"; do
if ! [[ "$scenario" =~ ^[A-Za-z0-9/_-]+$ ]]; then
echo "Extracted unexpected-failure name '${scenario}' does not look like a scenario name; passing the suite failure through." >&2
exit "$rc"
fi
done
# A stale baseline entry is a configuration error a solo rerun cannot excuse.
# Here-string, not a pipe: grep -q quitting early would SIGPIPE printf and,
# under pipefail, skip this guard exactly when the pattern is present.
if grep -q '^Stale baseline entries' <<<"$plain"; then
echo "Suite also reported stale baseline entries; not retrying." >&2
exit "$rc"
fi
# Drop the suite-only flags: --scenario replaces --suite, and solo runs are
# judged directly rather than against the baseline.
rerun_args=()
output_dir=""
skip_next=0
expect_output_dir=0
for arg in "$@"; do
if [ "$skip_next" -eq 1 ]; then
if [ "$expect_output_dir" -eq 1 ]; then
output_dir="$arg"
fi
skip_next=0
expect_output_dir=0
continue
fi
case "$arg" in
--output-dir)
skip_next=1
expect_output_dir=1
;;
--suite | --expected-failures) skip_next=1 ;;
--output-dir=*) output_dir="${arg#--output-dir=}" ;;
--suite=* | --expected-failures=*) ;;
*) rerun_args+=("$arg") ;;
esac
done
if [ -n "$output_dir" ]; then
rerun_args+=(--output-dir "${output_dir}-solo")
fi
for scenario in "${scenarios[@]}"; do
passed=0
for attempt in $(seq 1 "$SOLO_ATTEMPTS"); do
echo ""
echo "Re-running '${scenario}' solo (attempt ${attempt}/${SOLO_ATTEMPTS})..."
if npx --yes "$CONFORMANCE_PKG" client --scenario "$scenario" "${rerun_args[@]}"; then
passed=1
break
fi
done
if [ "$passed" -ne 1 ]; then
echo "'${scenario}' still fails when run alone: real failure, not suite contention." >&2
exit 1
fi
done
if [ -n "$output_dir" ]; then
mkdir -p "$output_dir"
printf '%s\n' "${scenarios[@]}" > "$output_dir/FLAKE_RESCUED"
fi
echo "All ${#scenarios[@]} unexpected failure(s) passed when re-run solo; the suite failures were parallel-run contention."
exit 0