omsagent_shim.sh

#!/usr/bin/env bash

# The entry point for the OMS extension through which the correct python version (if any) is used to invoke omsagent.py.
# We default to python2 and always invoke with the versioned python command to accomodate the RHEL 8+ python strategy.
# Control arguments passed to the shim are redirected to omsagent.py without validation.

COMMAND="./omsagent.py"
PYTHON=""
ARG="$@"

function find_python() {
    local python_exec_command=$1

    if command -v python2 >/dev/null 2>&1 ; then
        eval ${python_exec_command}="python2"
    elif command -v python3 >/dev/null 2>&1 ; then
        eval ${python_exec_command}="python3"
    fi
}

find_python PYTHON

if [ -z "$PYTHON" ]
then
    echo "No Python interpreter found, which is an OMS extension dependency. Please install either Python 2 or 3." >&2
    exit 52 # Missing Dependency
else
    ${PYTHON} --version 2>&1
fi

PYTHONPATH=${PYTHONPATH} ${PYTHON} ${COMMAND} ${ARG}
exit $?