#!/bin/bash
#
# The fingerprint driver migration only repairs a machine an earlier version of
# it left with fprintd and no libfprint; any installed driver is left alone.
# The real package helpers run over a stubbed pacman.

set -euo pipefail

source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"

migration="$ROOT/migrations/1785090473.sh"
scratch=$(mktemp -d)
trap 'rm -rf "$scratch"' EXIT
mkdir -p "$scratch/bin"
export CALL_LOG="$scratch/calls"
export PATH="$scratch/bin:$ROOT/bin:$PATH"

cat > "$scratch/bin/sudo" <<'STUB'
#!/bin/bash
exec "$@"
STUB
# INSTALLED lists the installed package names, one per line; an install adds
# its packages to INSTALLED_LOG so omarchy-pkg-add's follow-up query sees them.
cat > "$scratch/bin/pacman" <<'STUB'
#!/bin/bash
case "$1" in
  -Q)
    if [[ $2 == "--" ]]; then
      shift 2
    else
      shift
    fi
    if grep -qx -- "$1" <<< "${INSTALLED:-}"; then
      :
    else
      grep -qx -- "$1" "$INSTALLED_LOG"
    fi
    ;;
  -S)
    printf 'pacman %s\n' "$*" >> "$CALL_LOG"
    if [[ $4 == "--" ]]; then
      shift 4
      for arg in "$@"; do
        printf '%s\n' "$arg" >> "$INSTALLED_LOG"
      done
    fi
    ;;
  *) printf 'pacman %s\n' "$*" >> "$CALL_LOG" ;;
esac
STUB
chmod +x "$scratch/bin/"*
export INSTALLED_LOG="$scratch/installed"

run_migration() {
  : > "$CALL_LOG"
  : > "$INSTALLED_LOG"
  bash -euo pipefail "$migration" > /dev/null
}

INSTALLED='fprintd' run_migration
grep -qx 'pacman -S --noconfirm --needed -- libfprint-git' "$CALL_LOG" || fail "fprintd without a library gets libfprint-git"
pass "fprintd without a library gets libfprint-git"

INSTALLED=$'libfprint-git\nfprintd' run_migration
[[ ! -s $CALL_LOG ]] || fail "an installed libfprint-git is left alone" "$(<"$CALL_LOG")"
pass "an installed libfprint-git is left alone"

INSTALLED=$'libfprint\nfprintd' run_migration
[[ ! -s $CALL_LOG ]] || fail "an installed stock libfprint is left alone" "$(<"$CALL_LOG")"
pass "an installed stock libfprint is left alone"

INSTALLED='' run_migration
[[ ! -s $CALL_LOG ]] || fail "a machine without fprintd is left alone" "$(<"$CALL_LOG")"
pass "a machine without fprintd is left alone"