#!/bin/bash

# ============================================================================
# Run only the tests related to files changed vs HEAD (staged, unstaged and
# untracked). Quiet: failures plus a one-line summary. Falls back to the full
# suite when a change cannot be mapped to tests. Generated by repo_contract.
# ============================================================================

set -euo pipefail

cd "$(git rev-parse --show-toplevel)"
CHANGED=()
while IFS= read -r f; do
    [[ -n "$f" && -e "$f" ]] && CHANGED+=("$f")
done < <({ git diff --name-only HEAD 2>/dev/null || true; git ls-files --others --exclude-standard; } | sort -u)

# cargo cannot map files to tests without extra tooling: any rust change runs the suite.
if ! printf '%s\n' "${CHANGED[@]:-}" | grep -qE '\.rs$|Cargo\.(toml|lock)$'; then
    echo "no rust changes: nothing to test"; exit 0
fi
cargo test --quiet