pants

#!/bin/bash
# ==================================================================================================
# Copyright 2011 Twitter, Inc.
# --------------------------------------------------------------------------------------------------
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this work except in compliance with the License.
# You may obtain a copy of the License in the LICENSE file, or at:
#
#  http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==================================================================================================

MY_DIR=$(dirname $0)
VIRTUAL_PYTHON=$MY_DIR/.python/bootstrap

PANTS_EXE=$MY_DIR/src/python/twitter/pants/bin/pants_exe.py

PANTS_BOOTSTRAP_ARGS=${PANTS_BOOTSTRAP_ARGS:-''}

MARKDOWN_EGG=$MY_DIR/3rdparty/python/Markdown-2.1.1-py2.6.egg
PYGMENTS_EGG=$MY_DIR/3rdparty/python/Pygments-1.4-py2.6.egg
PYSTACHE_EGG=$MY_DIR/3rdparty/python/pystache-0.5.3-py2.6.egg
PYTHON_DAEMON_EGG=$MY_DIR/3rdparty/python/python_daemon-1.5.5-py2.6.egg

function run_pants_bare() {
  source $VIRTUAL_PYTHON/bin/activate
  PYTHONPATH=$MARKDOWN_EGG:$PYGMENTS_EGG:$PYSTACHE_EGG:$PYTHON_DAEMON_EGG:$MY_DIR/src/python \
    python $PANTS_BOOTSTRAP_ARGS $PANTS_EXE "$@"
  result=$?
  deactivate
  return $((result))
}

if [ ! -e $VIRTUAL_PYTHON/bin/python ]; then
  $MY_DIR/build-support/python/setup.sh
  rc=$?
  if [[ $rc != 0 ]]; then
    echo "Unable to bootstrap a sane Python virtual environment for pants!"
    rm -rf $VIRTUAL_PYTHON
    exit $rc
  fi
  source $VIRTUAL_PYTHON/bin/activate
  deactivate
fi

if [ -z "${PANTS_DEV}" -a ! -e $MY_DIR/pants.pex ]; then
  run_pants_bare src/python/twitter/pants:pants
  if [ ! -e $MY_DIR/dist/pants.pex ]; then
    echo "Unable to build pants!  Cannot continue!"
    exit 1
  else
    mv $MY_DIR/dist/pants.pex $MY_DIR/pants.pex
    cp $MY_DIR/pants.pex $VIRTUAL_PYTHON/pants.pex
  fi
fi

if [ ! -z "${PANTS_DEV}" ]; then
  # TODO(John Sirois): ideally this would just use pants.pex to run the pants target in py mode:
  # ./pants.pex py src/python/twitter/pants "$@"
  echo "*** running pants in dev mode from $PANTS_EXE ***" 1>&2
  run_pants_bare "$@"
  exit $ret
else
  ${MY_DIR}/pants.pex "$@"
fi