#!/bin/sh

# The MIT License (MIT)
#
# Copyright © 2020-2025 pacman64
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


# sf [options...] [folders...]
#
# Show Files (and folders), coloring folders and links, using ANSI styles to
# make things easier to scan/read.
#
# The only options are those for `systemctl status`, as well as any of `-h`,
# `--h`, `-help`, or `--help`, to show this help message.


case "$1" in
    -h|--h|-help|--help)
        awk '/^# +sf /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
        exit 0
    ;;
esac

gap=0

for arg in "${@:-.}"; do
    [ "${gap}" -gt 0 ] && printf "\n"
    printf "\e[7m%s\e[0m\n\n" "$(realpath "${arg}")"
    gap=1

    ls -al --file-type --color=never --time-style iso "${arg}" | awk '
        BEGIN {
            drep = "\x1b[38;2;0;135;255m\x1b[48;2;228;228;228m&\x1b[0m"
            lrep = "\x1b[38;2;0;135;95m\x1b[48;2;228;228;228m&\x1b[0m"
        }

        (NR - 1) % 5 == 1 && NR > 1 { print "" }

        {
            gsub(/^(d[rwx-]+)/, drep)
            gsub(/^(l[rwx-]+)/, lrep)
            printf "%6d  %s\n", NR - 1, $0; fflush()
        }
    '
done |

# (re)style all long-enough digit-runs/numbers in lines
awk '
{
    line = $0

    # restyle digit-runs which are longer than 3
    while (match(line, /[0-9]{4,}/)) {
        len = RLENGTH
        lead = len % 3
        alt = lead > 0

        printf "%s", substr(line, 1, RSTART + lead - 1)
        line = substr(line, RSTART + lead)
        len -= lead

        while (len > 0) {
            if (alt == 1) {
                printf "\x1b[38;2;168;168;168m%s\x1b[0m", substr(line, 1, 3)
            } else {
                printf "%s", substr(line, 1, 3)
            }

            alt = 1 - alt
            line = substr(line, 4)
            len -= 3
        }
    }

    printf "%s\n", line; fflush()
}
' |

less -JMKiCRS