#!/bin/sh
#
# License: MIT (see LICENSE.txt)
# THIS PROGRAM COMES WITH NO WARRANTY
#
# Copyright 2011-2016 Carsten Grohmann
#
# Shell script to start wxGlade
#
# The wxGlade main script is called wxglade.py. It will be searched at
# three places:
#  1. parallel to this script
#  2. in the module directory of the current Python
#  3. in a parallel Python module directory

# search order for Python interpreter
INTERPRETER_LIST="python2 \
                  python2.7 python27 \
                  python2.6 python26 \
                  python2.5 python25 \
                  python2.4 python24 \
                  python"

# Use the binary from PYTHON_BIN, if this environment variable is set
if [ "$PYTHON_BIN" ]; then
  INTERPRETER_LIST="$PYTHON_BIN"
fi

for INTERPRETER in $INTERPRETER_LIST; do
  ${INTERPRETER} -V >/dev/null 2>&1
  if [ $? -ne 0 ]; then
    continue
  fi

  # check if interpreter is for Python 2
  ${INTERPRETER} -V 2>&1 | grep -q "Python 2"
  if [ $? -ne 0 ]; then
    continue
  fi
  
  # Python 2 interpreter found
  PYTHON_BIN=$INTERPRETER

  break
done

if [ ! "$PYTHON_BIN" ]; then
  echo "ERROR: No interpreter for Python 2 found!"
  echo "       Please install Python 2 to run wxGlade!"
  exit 1
fi

# determined current python version
PY_VERSION=$(${PYTHON_BIN} -c 'import sys; print sys.version[:3]')

# determined prefix of the Python module directory structure
if [ -d "/usr/lib/pymodules/python${PY_VERSION}/wxglade" ]; then
  WXG_MODULE_PATH="/usr/lib/pymodules/python${PY_VERSION}/wxglade"
else
  WXG_MODULE_PATH="/usr/lib/python${PY_VERSION}/wxglade"
fi

# search wxglade.py
# dist-packages is only used in Debian and Debian derivates
CURR_DIR=$(dirname "$0")
for DIR in \
   "${CURR_DIR}" \
   "${WXG_MODULE_PATH}" \
   "${CURR_DIR}/../lib/python${PY_VERSION}/site-packages/wxglade" \
   "${CURR_DIR}/../lib/python${PY_VERSION}/dist-packages/wxglade" \
   ; do
  BINARY="${DIR}/wxglade.py"
  if [ -e "${BINARY}" ]; then
    WXG_BINARY="$BINARY"
    break
  fi
done

if [ ! "${WXG_BINARY}" ]; then
  echo "ERROR: wxglade.py not found!"
  exit 1
fi

# exec wxGlade
exec "${PYTHON_BIN}" "${WXG_BINARY}" "$@"