bash-mapfile-shim is a shim for the mapfile command in bash versions 4+.
Currently, only options -d and -t are supported.
source mapfile.bash in your .bashrc and use the mapfile function.
mapfile will use the existing mapfile command on bash 4+.
You can also call the function directly by calling mapfile_function.
It should behave like the mapfile command.
Currently, only options -d and -t are supported.
There is also an unused mapfile_IFS function that isn't used by the shim.
It works similar to word splitting where empty lines are not included
in the array if DELIM is whitespace (space, tab, newline) or null.