#!/usr/bin/env bash
set -uo pipefail

[ -d "$DCTLENV_ROOT/versions" ] || log_error 'No versions of driftctl installed. Please install one with: dctlenv install [<version>]'

DCTLENV_VERSION_FILE="$(dctlenv-version-file)" \
  && log_debug "DCTLENV_VERSION_FILE retrieved: $DCTLENV_VERSION_FILE" \
  || log_error 'Failed to retrieve DCTLENV_VERSION_FILE'

DCTLENV_VERSION="$(cat "$DCTLENV_VERSION_FILE" 2>/dev/null)" \
  && log_debug "DCTLENV_VERSION specified in DCTLENV_VERSION_FILE: $DCTLENV_VERSION" \
  || log_error "Version could not be resolved (set by $DCTLENV_VERSION_FILE or dctlenv use <version>)"

if [ ! -d "$DCTLENV_ROOT/versions/$DCTLENV_VERSION" ]; then
  log_error "Version '$DCTLENV_VERSION' is not installed (set by $DCTLENV_VERSION_FILE)"
fi

echo $DCTLENV_VERSION