#!/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.


# showrun [options...] [command...] [args...]
#
# SHOW a command as a highlighted line of text, then RUN it.
#
# The options are, available both in single and double-dash versions
#
#   -h        show this help message
#   -help     show this help message
#
#   -e        merge stderr into main output
#   -err      merge stderr into main output
#   -error    merge stderr into main output


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

merge_stderr=0
less_options='-MKiCRS --header=1'
for arg in "$@"; do
    case "${arg}" in
        -e|--e|-err|--err|-error|--error|-errors|--errors)
            merge_stderr=1
            shift
        ;;
        -n|--n|-N|--N)
            less_options="${less_options} -N"
            shift
        ;;
        *)
            break
        ;;
    esac
done

[ "$1" = "--" ] && shift

if [ $# -eq 0 ]; then
    awk '/^# +showrun /, /^$/ { gsub(/^# ?/, ""); print }' "$0" >&2
    exit 0
fi

if [ "${merge_stderr}" -eq 0 ]; then
    { printf "\e[7m%s\e[0m\n" "$*"; "$@"; }
else
    { printf "\e[7m%s\e[0m\n" "$*"; "$@" 2>&1; }
fi | less "${less_options}"