ap

#!/bin/bash
# @Function
# convert to Absolute Path.
#
# @Usage
#   # print Absolute Path of current directory.
#   $ ./ap
#   # print Absolute Path of arguments.
#   $ ./ap a.txt ../dir1/b.txt
#
# @online-doc https://github.com/oldratlee/useful-scripts/blob/dev-2.x/docs/shell.md#-ap-and-rp
# @author Jerry Lee (oldratlee at gmail dot com)
set -eEuo pipefail

READLINK_CMD=readlink
if command -v greadlink > /dev/null; then
    READLINK_CMD=greadlink
fi

[ $# -eq 0 ] && files=(.) || files=("$@")

for f in "${files[@]}"; do
    ! [ -e "$f" ] && {
        echo "$f does not exists!"
        continue
    }
    $READLINK_CMD -f "$f"
done