Unable to use add_key for multiple keys

[timgraham]

According to the makenemo help text it should be possible to add multiple keys using the following syntax:
./makenemo add_key "key_iomput key_mpp_mpi"

This results in the following error message (although makenemo continues to build the configuration without adding the keys):
./makenemo: line 203: [: key_iomput: binary operator expected

[timgraham]

I think this can be fixed by changing line 203 from:

[ ! -z $2 ] && { list_add_key=$2; export ${list_add_key}; }

to

[ ! -z "$2" ] && { list_add_key=$2; export ${list_add_key}; }

Similarly for line 208. I'm testing the change now.

[timgraham]

The above syntax doesn't work if " " is passed as the argument. It ends up printing out all environment variables.

Instead the test needs to be:

[[ ! "$2" =~ ^\ +$ ]] && { list_add_key=$2; export ${list_add_key}; }

This checks that the string is not null and contains characters other than white space.

I've fixed this at r5142