trash

#!/bin/bash

# trash
# A script similar to the recycle bin feature on windows platforms.
# It moves files/directorys to a defined directory instead of removing them from the filesystem.
# If you really want to get rid of them, you can use the trash-empty command.

# Version:  0.42
# Build:    2022-12-12
# Author:   Heiko Barth
# Licence:  Beer-Ware (See: https://en.wikipedia.org/wiki/Beerware)

APP=${0##*/}
VER=0.42

set -ueo pipefail

if [ -z "${TRASHDIR:-}" ]; then
	echo 'Error: $TRASHDIR is not set.'
	echo
	exit 1
fi >&2

[ $# -eq 0 ] && {
	echo "$APP $VER"
	echo
	echo "A script similar to the recycle bin feature on windows platforms."
	echo "It moves files/directorys to a defined directory instead of removing them from the filesystem."
	echo "If you really want to get rid of them, you can use the trash-empty command."
	echo
	echo "Syntax: $APP <directory/file> [<another directory/file>]"
	echo
	echo "Syntax: $APP-empty [options]"
	echo
	echo "Empty trash:                             $APP-empty"
	echo "Shred some file types and empty trash:   $APP-empty txt jpg"
	echo "Shred all files and empty trash:         $APP-empty --shred"
	exit 1
} >&2

checkBinarys() {
	local i
	for i in "$@"; do
		hash "$i" 2>/dev/null || {
			echo "Error: Binary '$i' is missing."
			echo
			exit 1
		} >&2
	done
}
checkBinarys "basename" "date" "mkdir" "mv" "stat"

# shellcheck disable=SC2174
mkdir -p -m 700 "$TRASHDIR" 2> /dev/null || {
	echo "Error: Failed to create directory '$TRASHDIR'."
	echo
	exit 1
} >&2

# Set your desired date format; See 'man date' for details
TODAY=$(date +%Y-%m-%d)
TRASHTODAY="$TRASHDIR/$TODAY"

# Create target directory
# shellcheck disable=SC2174
mkdir -p -m 700 "$TRASHTODAY" 2> /dev/null || {
	echo "Error: Failed to create directory '$TRASHTODAY'."
	echo
	exit 1
} >&2

FAIL=0
for i in "$@"; do
	# Abort if file does not exist and is no symbolic link (there can be symbolic links pointing to files that does not exist)
	if [ ! -e "$i" ] && [ "$(stat -c %F "$i" 2>/dev/null)" != "symbolic link" ]; then
		echo "Error: File/Directory '$i' does not exist." >&2
		FAIL=1
		continue
	fi

	# basename of file or directory
	# ${i##*/} returns empty string for "directory/"
	NAME=$(basename "$i")

	# If target exist, find an alternate name
	MAX=500
	if [ -e "$TRASHTODAY/$NAME" ] || [ -h "$TRASHTODAY/$NAME" ]; then
		j=0
		while :; do
			((++j))
			if [ ! -e "$TRASHTODAY/$NAME.$j" ] && [ ! -h "$TRASHTODAY/$NAME.$j" ]; then
				NAME="$NAME.$j"
				break
			fi
			if ((j == MAX)); then
				echo "Warning: '$TRASHTODAY/$NAME' already exists."
				echo "Error: Could not find an alternative target name. Gave up, after $MAX iterations: $TRASHTODAY/$NAME.$j"
				echo "Error: File '$i' not moved."
				FAIL=1
				continue
			fi
		done
	fi

	mv "$i" "$TRASHTODAY/$NAME" || {
		echo "Error: Failed to move '$i' --> '$TRASHTODAY/$NAME.$j'"
		FAIL=1
	} >&2
done

[ $FAIL -eq 1 ] && echo
exit $FAIL