source: rtems-tools/rtemstoolkit/python-wrapper.sh

#
# RTEMS Tools Project (http://www.rtems.org/)
# Copyright 2018 Chris Johns (chrisj@rtems.org)
# All rights reserved.
#
# This file is part of the RTEMS Tools package in 'rtems-tools'.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#

#
# This script wraps python finding a suitable version to use.
#
set -e
if test ! -f $PYTHON_CMD; then
  echo "error: RTEMS Toolkit python command not found: $PYTHON_CMD"
  exit 5
fi
for py in python3 python2 python
do
  set +e
  py_cmd=$(command -v $py)
  set -e
  if test -n "$RTEMS_PYTHON_OVERRIDE"; then
    if test "$RTEMS_PYTHON_OVERRIDE" != "$py"; then
      py_cmd=""
    fi
  fi
  if test -n "$py_cmd"; then
    exec $py_cmd $PYTHON_CMD $0 $*
  fi
done
echo "error: RTEMS Toolkit no valid python found"
exit 5