#!/bin/echo You are not supposed to run this file.

# Copyright 2022, FOSS-VG Developers and Contributers
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# version 3 along with this program.
# If not, see https://www.gnu.org/licenses/agpl-3.0.en.html

if [ "$(tr '[:upper:]' '[:lower:]' <<< $SINGLE)" = "yes" ]; then
    echo "Single-threaded mode enabled."
    WAIT_ANYWAY="wait"
else
    WAIT_ANYWAY=""
fi

if [ -z "$CXX" ]; then
    CXX="c++"
fi
if [ -z "$CXXFLAGS" ]; then
    CXXFLAGS="-std=c++20 -Wall -Wextra"
fi
CXX_WITH_FLAGS="$CXX $CXXFLAGS"

# automatically find and use an appropriate sha256 sum command
# currently supports sha256sum and NetBSD's sha256
if command -v sha256sum > /dev/null; then
    function check_sha256 {
        FILE="$1"
        CHECKSUM="$2"
        sha256sum --check <<< "$CHECKSUM *$FILE" >/dev/null 2>&1
        return $?
    }
else
    if command -v sha256 > /dev/null; then
        function check_sha256 {
            FILE="$1"
            CHECKSUM="$2"
            sha256 -c <<< "SHA256 ($FILE) = $CHECKSUM" >/dev/null 2>&1
            return $?
        }
    else
        echo "Could not find sha256sum or sha256."
        exit 1
    fi
fi

# This function exists to make the output more sensible on platforms where
# `rm -v` only prints the names of the removed things instead of a more
# comprehensible message like "removing NAME".
function remove {
    local USE_FORCE=""
    if [ "$1" = "-f" ]; then
      USE_FORCE="-f"
      echo "Forcefully removing $1..."
    else
      echo "Removing $1..."
    fi;
    shift
    if [ -d "$1" ]; then
        rm "$USE_FORCE" -rv "$1"
    else
        rm "$USE_FORCE" -v "$1"
    fi
}

# some platforms don’t support `mkdir -v`
function create_directory {
    echo "Creating directory: $1"
    mkdir -p "$1"
}

# `mkfile -v` if you will
function create_file {
    echo "Creating file: $1"
    touch "$1"
}