+ local clean keep move verbose result all to_bk
+ setopt extended_glob
+ keep=1
+ while getopts ":hacmrv" opt; do
+ case $opt in
+ a) (( all++ ));;
+ c) unset move clean && (( ++keep ));;
+ m) unset keep clean && (( ++move ));;
+ r) unset move keep && (( ++clean ));;
+ v) verbose="-v";;
+ h) cat <<__EOF0__
+bk [-hcmv] FILE [FILE ...]
+bk -r [-av] [FILE [FILE ...]]
+Backup a file or folder in place and append the timestamp
+Remove backups of a file or folder, or all backups in the current directory
+
+Usage:
+-h Display this help text
+-c Keep the file/folder as is, create a copy backup using cp(1) (default)
+-m Move the file/folder, using mv(1)
+-r Remove backups of the specified file or directory, using rm(1). If none
+ is provided, remove all backups in the current directory.
+-a Remove all (even hidden) backups.
+-v Verbose
+
+The -c, -r and -m options are mutually exclusive. If specified at the same time,
+the last one is used.
+
+The return code is the sum of all cp/mv/rm return codes.
+__EOF0__
+return 0;;
+ \?) bk -h >&2; return 1;;
+ esac
+ done
+ shift "$((OPTIND-1))"
+ if (( keep > 0 )); then
+ if islinux || isfreebsd; then
+ for to_bk in "$@"; do
+ cp $verbose -a "${to_bk%/}" "${to_bk%/}_$current_date"
+ (( result += $? ))
+ done
+ else
+ for to_bk in "$@"; do
+ cp $verbose -pR "${to_bk%/}" "${to_bk%/}_$current_date"
+ (( result += $? ))
+ done
+ fi
+ elif (( move > 0 )); then
+ while (( $# > 0 )); do
+ mv $verbose "${1%/}" "${1%/}_$current_date"
+ (( result += $? ))
+ shift
+ done
+ elif (( clean > 0 )); then
+ if (( $# > 0 )); then
+ for to_bk in "$@"; do
+ rm $verbose -rf "${to_bk%/}"_[0-9](#c4,)-(0[0-9]|1[0-2])-([0-2][0-9]|3[0-1])T([0-1][0-9]|2[0-3])(:[0-5][0-9])(#c2)Z
+ (( result += $? ))
+ done
+ else
+ if (( all > 0 )); then
+ rm $verbose -rf *_[0-9](#c4,)-(0[0-9]|1[0-2])-([0-2][0-9]|3[0-1])T([0-1][0-9]|2[0-3])(:[0-5][0-9])(#c2)Z(D)