#!/usr/bin/awk -f

# 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.


# dessv [filepaths...]
#
# Convert lines of Space(s)-Separated Values (SSV) into lines of Tab-Separated
# Values (TSV).


# ignore leading UTF-8 BOMs on the first line of each input, when present
FNR == 1 { gsub(/^\xef\xbb\xbf/, "") }

# ignore trailing carriage-returns before emitting lines; keep flushing
# output-buffer for each line, in case input lines come in `stutters`,
# as when piping live activity logs, for example
{
    gsub(/\r$/, "")
    for (i = 1; i <= NF; i++) {
        if (i > 1) printf "\t"
        printf "%s", $i
    }
    printf "\n"; fflush()
}