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rustfs/scripts/check_migration_gate_count.sh
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Zhengchao An b9e5e818a9 ci: fix migration-gate count guard failing on every PR (nextest JSON counting) (#4686)
ci: count migration-gate tests via nextest JSON, not human-format indentation

The count-floor guard (#4673) parsed nextest's human list format with
grep -c '^    '. CI's newer nextest emits a different indentation, so the
count collapsed to 0 and the gate failed on every PR based on current
main (first observed on #4683, then #4674/#4677/#4680). Count via
--message-format json + jq instead, which is stable across versions, and
fail loudly if the JSON shape ever changes.
2026-07-10 22:19:17 +08:00

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#!/usr/bin/env bash
# Count-floor guard for the migration-critical test gate (backlog#1153 infra-12).
#
# ci.yml's migration gate selects tests BY NAME SUBSTRING. A rename that drops
# a test out of the filter silently thins the gate — potentially to zero —
# without any CI signal (this is how the layered gate died when #878 closed).
# This script owns the filter expression so the count check and the test run
# cannot drift, and fails fast when the number of selected tests drops below
# the committed floor in .config/migration-gate-floor.txt.
#
# NAMING CONVENTION DEPENDENCY: migration-gate tests are matched by these
# reserved name substrings:
#
# data_movement, rebalance, decommission, source_cleanup, delete_marker
#
# Renaming a test away from all of these substrings removes it from the gate.
# The floor equals the exact selected-test count at the time it was last
# committed, so ANY reduction fails CI. To shrink the gate intentionally
# (test removed or consciously renamed), update the floor file in the same PR
# so the reduction is visible in the diff. Adding tests never requires a floor
# bump (the floor is a lower bound), but bumping it keeps the guard tight.
#
# Per-pattern floors are deliberately omitted: with an exact-count total floor,
# a single test dropping out of any pattern already fails the check, so
# per-pattern bookkeeping would add churn without detection power.
#
# Usage:
# scripts/check_migration_gate_count.sh # count check + run the gate
# scripts/check_migration_gate_count.sh check # count check only
# scripts/check_migration_gate_count.sh run # run the gate only
set -euo pipefail
cd "$(dirname "$0")/.."
# Single source of truth for the migration-gate filter. ci.yml must invoke
# this script instead of inlining the expression.
MIGRATION_GATE_FILTER='test(data_movement) or test(rebalance) or test(decommission) or test(source_cleanup) or test(delete_marker)'
FLOOR_FILE=".config/migration-gate-floor.txt"
mode="${1:-all}"
case "$mode" in
all | check | run) ;;
*)
echo "usage: $0 [all|check|run]" >&2
exit 2
;;
esac
if [[ "$mode" == "all" || "$mode" == "check" ]]; then
floor="$(grep -Ev '^[[:space:]]*(#|$)' "$FLOOR_FILE" | head -n1 | tr -d '[:space:]')"
if ! [[ "$floor" =~ ^[0-9]+$ ]]; then
echo "error: $FLOOR_FILE does not contain a numeric floor (got: '$floor')" >&2
exit 1
fi
# Count via the structured JSON listing, not the human format: the
# human format's indentation varies across nextest versions (CI's newer
# nextest emitted a layout where no line matched '^ ', collapsing the
# count to 0 and failing every PR). A nextest failure aborts via set -e
# with its stderr visible; a JSON schema change makes jq fail loudly
# rather than silently passing.
count="$(cargo nextest list -p rustfs-ecstore --lib -E "$MIGRATION_GATE_FILTER" --message-format json \
| jq '[."rust-suites"[].testcases[] | select(."filter-match".status == "matches")] | length')"
if ! [[ "$count" =~ ^[0-9]+$ ]]; then
echo "error: could not parse nextest JSON listing (got count: '$count')" >&2
exit 1
fi
if ((count < floor)); then
echo "error: migration gate selects $count tests, below the committed floor of $floor." >&2
echo "" >&2
echo "The gate matches tests by name substring (data_movement / rebalance /" >&2
echo "decommission / source_cleanup / delete_marker). A rename or removal has" >&2
echo "thinned the selection. Either restore the test names, or — if the" >&2
echo "reduction is intentional — update $FLOOR_FILE in this PR so the" >&2
echo "gate change is explicit and reviewable." >&2
exit 1
fi
echo "migration gate count OK: $count selected tests (floor: $floor)"
fi
if [[ "$mode" == "all" || "$mode" == "run" ]]; then
cargo nextest run -p rustfs-ecstore --lib -E "$MIGRATION_GATE_FILTER"
fi