bootstrap

#!/usr/bin/env bash

set -e
trap "exit 1" INT

: ${VIRTUALENV_NAME:="mesos-cli"}

# If we already have a virtual environment activates,
# bail out and advise the user to deactivate.
OLD_VIRTUAL_ENV=${VIRTUAL_ENV}
if [ "${OLD_VIRTUAL_ENV}" != "" ]; then
    echo "Please deactivate your current virtual environment in order to continue!"
    exit 1
fi

# Verify that python 2.7, pip, and virtualenv are installed.
PYTHON=$(which python) || true
PIP=$(which pip) || true
VIRTUALENV=$(which virtualenv) || true
if [ "${PYTHON}" = "" ] || [ "${PIP}" = "" ] || [ "${VIRTUALENV}" = "" ]; then
  echo "You must have python, pip, and virtualenv installed in order to continue..."
  exit 1
fi
PYTHON_MAJOR=$(python -c 'import sys; print sys.version_info[0]')
PYTHON_MINOR=$(python -c 'import sys; print sys.version_info[1]')
if [ "${PYTHON_MAJOR}" != "2" ] || [ "${PYTHON_MINOR}" != "7" ]; then
  echo "You must be running python 2.7.x in order to continue..."
  exit 1
fi

# Set up a virtual environment for the CLI
export VIRTUALENV_NAME=$(pwd)/.virtualenv

virtualenv --python=$(which python) \
           --clear \
           --no-site-packages \
           --prompt="(mesos-cli) " \
           ${VIRTUALENV_NAME} || true

source ${VIRTUALENV_NAME}/bin/activate
SITE_PACKAGES=$(python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
echo "$(pwd)/lib" > ${SITE_PACKAGES}/_virtualenv_path_extensions.pth
pip install --upgrade pip
pip install -r pip-requirements.txt
deactivate

# Add custom postactivate / predeactivate scripts to add / remove
# the bin directory of this project to the current path in the
# virtual environment (as well as setup bash auto completion).
cat > ${VIRTUALENV_NAME}/bin/postactivate << EOF
#!/usr/bin/env bash
PROJECT_BIN="${PWD}/bin"
PATH="\${PROJECT_BIN}:\${PATH}"

EOF
cat mesos.bash_completion >> ${VIRTUALENV_NAME}/bin/postactivate

cat > ${VIRTUALENV_NAME}/bin/predeactivate << EOF
#!/usr/bin/env bash
PROJECT_BIN="${PWD}/bin"
PATH=\${PATH/":\${PROJECT_BIN}"/}
PATH=\${PATH/"\${PROJECT_BIN}:"/}

complete -r mesos
EOF

# Print some info about the sucess of the installation.
echo ""
echo "Setup complete!"
echo ""
echo "To begin working, simply activate your virtual"
echo "environment and deactivate it when you are done."
echo ""
echo "    $ source activate"
echo "    $ mesos <command> [<args>...]"
echo "    $ source deactivate"
echo ""