When bash is started non-interactively, to run a shell script, for example, it looks
       for the variable BASH_ENV in the environment, expands its value if it appears there,
       and uses the expanded value as the name of a file to read and execute.  Bash behaves
       as if the following command were executed:
              if [ -n "$BASH_ENV" ]; then . "$BASH_ENV"; fi
       but the value of the PATH variable is not used to search for the file name.