#!/bin/sh
set -u

root="$(git rev-parse --show-toplevel)"
tools="$root/.cache/flake-tools/bin"
status=0
swift="$(git diff --cached --name-only --diff-filter=ACMR -- '*.swift')"

if [ -n "$swift" ]; then
  if [ -x "$tools/swiftformat" ] && [ -x "$tools/swiftlint" ]; then
    snapshot="$(mktemp -d)"
    trap 'rm -rf "$snapshot"' EXIT
    printf '%s\n' "$swift" .swiftformat .swiftlint.yml .swift-version | git checkout-index --prefix="$snapshot/" --stdin
    sources="$(printf '%s\n' "$swift" | grep '^Sources/' || true)"
    (
      cd "$snapshot" || exit 1
      printf '%s\n' "$swift" | tr '\n' '\0' | xargs -0 "$tools/swiftformat" --lint --quiet || exit 1
      if [ -n "$sources" ]; then
        printf '%s\n' "$sources" | tr '\n' '\0' | xargs -0 "$tools/swiftlint" lint --quiet --force-exclude || exit 1
      fi
    ) || status=1
  else
    echo "pre-commit: skipping SwiftFormat and SwiftLint, run make setup-tools to enable them" >&2
  fi
fi

if ! git diff --cached --quiet -- Scripts/dev-tools.env; then
  pins="$(mktemp)"
  git show :Scripts/dev-tools.env > "$pins"
  python3 "$root/Scripts/check-pinned-downloads.py" "$pins" ||
    echo "pre-commit: warning, ci and make setup will fail until the pinned download above is public" >&2
  rm -f "$pins"
fi

exit "$status"