set -e

if [[ -z "$COMMON_SH_SOURCED" ]]; then

COMMON_SH_SOURCED=1

export TEST_ROOT=$(realpath ${TMPDIR:-/tmp}/nix-test)/${TEST_NAME:-default}
export NIX_STORE_DIR
if ! NIX_STORE_DIR=$(readlink -f $TEST_ROOT/store 2> /dev/null); then
    # Maybe the build directory is symlinked.
    export NIX_IGNORE_SYMLINK_STORE=1
    NIX_STORE_DIR=$TEST_ROOT/store
fi
export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
export NIX_STATE_DIR=$TEST_ROOT/var/nix
export NIX_CONF_DIR=$TEST_ROOT/etc
export NIX_DAEMON_SOCKET_PATH=$TEST_ROOT/dSocket
unset NIX_USER_CONF_FILES
export _NIX_TEST_SHARED=$TEST_ROOT/shared
if [[ -n $NIX_STORE ]]; then
    export _NIX_TEST_NO_SANDBOX=1
fi
export _NIX_IN_TEST=$TEST_ROOT/shared
export _NIX_TEST_NO_LSOF=1
export NIX_REMOTE=$NIX_REMOTE_
unset NIX_PATH
export TEST_HOME=$TEST_ROOT/test-home
export HOME=$TEST_HOME
unset XDG_CONFIG_HOME
unset XDG_CONFIG_DIRS
unset XDG_CACHE_HOME
mkdir -p $TEST_HOME

export PATH=@bindir@:$PATH
if [[ -n "${NIX_CLIENT_PACKAGE:-}" ]]; then
  export PATH="$NIX_CLIENT_PACKAGE/bin":$PATH
fi
DAEMON_PATH="$PATH"
if [[ -n "${NIX_DAEMON_PACKAGE:-}" ]]; then
  DAEMON_PATH="${NIX_DAEMON_PACKAGE}/bin:$DAEMON_PATH"
fi
coreutils=@coreutils@

export dot=@dot@
export SHELL="@bash@"
export PAGER=cat
export busybox="@sandbox_shell@"

export version=@PACKAGE_VERSION@
export system=@system@

export IMPURE_VAR1=foo
export IMPURE_VAR2=bar

cacheDir=$TEST_ROOT/binary-cache

readLink() {
    ls -l "$1" | sed 's/.*->\ //'
}

clearProfiles() {
    profiles="$NIX_STATE_DIR"/profiles
    rm -rf $profiles
}

clearStore() {
    echo "clearing store..."
    chmod -R +w "$NIX_STORE_DIR"
    rm -rf "$NIX_STORE_DIR"
    mkdir "$NIX_STORE_DIR"
    rm -rf "$NIX_STATE_DIR"
    mkdir "$NIX_STATE_DIR"
    clearProfiles
}

clearCache() {
    rm -rf "$cacheDir"
}

clearCacheCache() {
    rm -f $TEST_HOME/.cache/nix/binary-cache*
}

startDaemon() {
    # Don’t start the daemon twice, as this would just make it loop indefinitely
    if [[ "$NIX_REMOTE" == daemon ]]; then
      return
    fi
    # Start the daemon, wait for the socket to appear.  !!!
    # ‘nix-daemon’ should have an option to fork into the background.
    rm -f $NIX_DAEMON_SOCKET_PATH
    PATH=$DAEMON_PATH nix daemon &
    for ((i = 0; i < 30; i++)); do
        if [[ -S $NIX_DAEMON_SOCKET_PATH ]]; then break; fi
        sleep 1
    done
    pidDaemon=$!
    trap "killDaemon" EXIT
    export NIX_REMOTE=daemon
}

killDaemon() {
    kill $pidDaemon
    for i in {0.10}; do
        kill -0 $pidDaemon || break
        sleep 1
    done
    kill -9 $pidDaemon || true
    wait $pidDaemon || true
    trap "" EXIT
}

restartDaemon() {
  [[ -z "${pidDaemon:-}" ]] && return 0

  killDaemon
  unset NIX_REMOTE
  startDaemon
}

if [[ $(uname) == Linux ]] && [[ -L /proc/self/ns/user ]] && unshare --user true; then
    _canUseSandbox=1
fi

isDaemonNewer () {
  [[ -n "${NIX_DAEMON_PACKAGE:-}" ]] || return 0
  local requiredVersion="$1"
  local daemonVersion=$($NIX_DAEMON_PACKAGE/bin/nix-daemon --version | cut -d' ' -f3)
  [[ $(nix eval --expr "builtins.compareVersions ''$daemonVersion'' ''$requiredVersion''") -ge 0 ]]
}

requireDaemonNewerThan () {
  isDaemonNewer "$1" || exit 99
}

canUseSandbox() {
    if [[ ! $_canUseSandbox ]]; then
        echo "Sandboxing not supported, skipping this test..."
        return 1
    fi

    return 0
}

fail() {
    echo "$1"
    exit 1
}

expect() {
    local expected res
    expected="$1"
    shift
    set +e
    "$@"
    res="$?"
    set -e
    [[ $res -eq $expected ]]
}

needLocalStore() {
  if [[ "$NIX_REMOTE" == "daemon" ]]; then
    echo "Can’t run through the daemon ($1), skipping this test..."
    return 99
  fi
}

# Just to make it easy to find which tests should be fixed
buggyNeedLocalStore () {
  needLocalStore
}

set -x

if [[ -n "${NIX_DAEMON_PACKAGE:-}" ]]; then
    startDaemon
fi

fi # COMMON_SH_SOURCED
