Use the resolve() function for more package managers

[willeccles]

At the moment, only xbps uses this, but presumably this would be useful for any other PM with a from command.

The function:

cpm/cpm

Lines 151 to 156 in 68ff9eb

	# resolve symlinks in path to file (may or may not work for a directory, but
	# I doubt there's a need for that anyway)
	resolve() {
	cd -P "${1%/*}" 2>/dev/null || PWD="${1%/*}"
	printf '%s\n' "${PWD}/${1##*/}"
	}

The usage:

cpm/cpm

Line 316 in 68ff9eb

from) xbps-query -o "$(resolve "$1")";;

This is adjacent to #51, which should be an addition to the resolve() function.

[eepykate]

No good solution to use this and support multiple arguments, this is only needed on xbps, and it would just be a downgrade to force single arguments elsewhere.