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I've got this example:
[nir]$ cat a.cfg
--arg1 $(./get.sh variable)
[nir]$ cat get.sh
echo "${1}-info"
[nir]$ cat a.sh
arg=$(cat a.cfg)
echo "$arg"
[nir]$ ./a.sh
--arg1 $(./get.sh variable)
I want the a.sh to return --arg variable-info. the end result is to switch the echo with a real command that takes a.cfg, parse it, and send it as the arguments.
You could have in a.sh:
eval '
arg=$(cat << EOF
'"$(cat a.cfg)"'
EOF
)'
printf '%s\n' "$arg"
Which tells the shell to evaluate this shell code:
arg=$(cat << EOF
--arg1 $(./get.sh variable)
EOF
)
And the $(...) will be expanded as it's inside a here-document with unquoted delimiter.
./get.sh variable in the main script. thanks though.
a.shanda.cfgdon't take any arguments. That's not what you're looking for, but it's hard to tell which parts of the whole thing here can't be modified (e.g. because they're actually third-party commands). I would probably approach that by changinga.cfgto a script that outputs the required stuff, so you'd usearg=$(otherscript.sh)instead ofarg=$(cat otherfile). Running code in there is going to be the end result anyway.