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|
#! /bin/sh
#!buildShellBin prepend-path=coreutils:which
#
# NAME
# deref - dereference a name or path, showing all intermediaries
#
# SYNOPSIS
# deref [OPTION]... NAME...
#
# DESCRIPTION
#
#
# --show=asis, --show=as-is
# When encountering relative file names, show them as-is.
# This is the default behavior.
#
# --show=all
# When encountering relative file names, show them as-is
# and additionally show their absolute file name.
#
# --show=abs, --show=absolute
# When encountering relative file names, show their absolute
# file name.
#
set -efu
showname=asis
case $1 in
(--show=asis|--show=as-is|--show=all|--show=abs|--show=absolute)
showname=${1#--show=}
shift
;;
(-*)
echo "$0: bad argument: $1" >&2
exit 1
;;
esac
showname() {
if test -L "$1" || test -e "$1"; then
case $1 in
/*)
ls -d --color "$1"
;;
*)
case $showname in
asis|as-is)
ls -d --color "$1"
;;
abs|absolute)
ls -d --color "$(realpath -sm "$1")"
;;
all)
echo "$(ls -d --color "$1")=$(ls -d --color "$(realpath -sm "$1")")"
;;
esac
;;
esac
else
printf '[31m%s[m' "$name"
fi
}
pwd=$PWD
for name; do
cd "$pwd"
path=
sep=
if ! test -L "$name" && ! test -e "$name"; then
if which=$(which "$name" 2>/dev/null); then
path=$name
sep=' ⇒ '
name=$which
fi
fi
while test -L "$name"; do
cd "$(dirname "$name")"
path=${path+$path$sep}$(showname "$name")
sep=' → '
name=$(readlink "$name")
done
path=${path+$path$sep}$(showname "$name")
echo "$path"
done
|
