# shellcheck shell=sh

# This function takes no arguments
# It tries to determine the name of this file in a programatic way.
_get_sourced_filename() {
    # shellcheck disable=SC3054,SC2296 # non-POSIX array access and bad '(' are guarded
    if [ -n "${BASH_SOURCE+x}" ] && [ -n "${BASH_SOURCE[0]}" ]; then
        # shellcheck disable=SC3054 # non-POSIX array access is guarded
        basename "${BASH_SOURCE[0]}"
    elif [ -n "${ZSH_NAME+x}" ] && [ -n "${(%):-%x}" ]; then
        # in zsh use prompt-style expansion to introspect the same information
        # see http://stackoverflow.com/questions/9901210/bash-source0-equivalent-in-zsh
        # shellcheck disable=SC2296  # bad '(' is guarded
        basename "${(%):-%x}"
    else
        echo "UNKNOWN FILE"
    fi
}

# The arguments to this are space separated environment
#  variable names. The value in CONDA_BACKUP_ is restore
#  and the CONDA_BACKUP_ is removed.
_tc_deactivation() {
  local thing
  local from
  local to

  from="CONDA_BACKUP_"
  to=""

  for thing in "$@"; do
    case "${thing}" in
      *,*)
        thing="${thing%%,*}"
        ;;
      *)
        ;;
    esac
    eval oldval="\${${from}$thing:-}"
    if [ -n "${oldval:-}" ]; then
      eval export "${to}'${thing}'=\"${oldval}\""
    else
      eval unset '${to}${thing}'
    fi
    eval unset '${from}${thing}'
  done
  return 0
}

if [ "@IS_WIN@" = "1" ]; then
  CONDA_PREFIX=$(echo "${CONDA_PREFIX:-}" | sed 's,\\,\/,g')
fi

if [ "${CONDA_BUILD:-0}" = "1" ]; then
  if [ -f /tmp/old-env-$$.txt ]; then
    rm -f /tmp/old-env-$$.txt || true
  fi
  env > /tmp/old-env-$$.txt
fi

_tc_deactivation \
  "GFORTRAN" \
  "F95" \
  "FC" \
  "F77" \
  "F90" \
  "FC_FOR_BUILD" \
  "FFLAGS" \
  "FORTRANFLAGS" \
  "DEBUG_FFLAGS" \
  "DEBUG_FORTRANFLAGS" \

if [ $? -ne 0 ]; then
  echo "ERROR: $(_get_sourced_filename) failed, see above for details"
else
  if [ "${CONDA_BUILD:-0}" = "1" ]; then
    if [ -f /tmp/new-env-$$.txt ]; then
      rm -f /tmp/new-env-$$.txt || true
    fi
    env > /tmp/new-env-$$.txt

    echo "INFO: $(_get_sourced_filename) made the following environmental changes:"
    diff -U 0 -rN /tmp/old-env-$$.txt /tmp/new-env-$$.txt | tail -n +4 | grep "^-.*\|^+.*" | grep -v "CONDA_BACKUP_" | sort
    rm -f /tmp/old-env-$$.txt /tmp/new-env-$$.txt || true
  fi
fi

if [ "@IS_WIN@" = "1" ]; then
  CONDA_PREFIX=$(echo "${CONDA_PREFIX:-}" | sed 's,\/,\\,g')
fi