#! /bin/bash
# Toolchain builder for the Serene programming language
#
# Copyright (c) 2019-2023 Sameer Rahmani <lxsameer@gnu.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 2.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# -----------------------------------------------------------------------------
# Commentary
# -----------------------------------------------------------------------------
# This is the builder script for the Serene project. It makes it easier to
# interact with the CMake build scripts.
#
# In order to define a subcommand all you need to do is to define a function
# with the following syntax:
#
# function subcommand-name() { ## DESCRIPTION
#   .. subcommand body ..
# }
#
# Make sure to provid one line of DESCRIPTION for the subcommand and use two "#"
# characters to start the description following by a space. Otherwise, your
# subcommand won't be registered
#
set -e

command=$1
VERSION="0.9.0"

ME=$(cd "$(dirname "$0")/." >/dev/null 2>&1 ; pwd -P)

# shellcheck source=./scripts/utils.sh
source "$ME/scripts/utils.sh"

user="serene"
channel="stable"

function _conan() {
    PYTHONPATH="$ME:$PYTHONPATH" conan "$@"
}

function _create() {
    _conan create --user "$user" --channel "$channel" \
           --profile:host="../../profiles/stage$1" \
           . "${@:2}"
}
function llvm-source() { ## Build the llvm source pkg
    _push "packages/sources/llvm/"
    _create "$@"
    _pop
}

function cmake() { ## Build the cmake package
    _push "packages/cmake/"
    _create "$@"
    _pop
}

function gcc() { ## Build the gcc package
    _push "packages/gcc/"
    _create "$@"
    _pop
}

function help() { ## Print out this help message
    echo "Commands:"
    grep -E '^function [a-zA-Z0-9_-]+\(\) \{ ## .*$$' "$0" | \
        sort | \
        sed 's/^function \([a-zA-Z0-9_-]*\)() { ## \(.*\)/\1:\2/' | \
        awk 'BEGIN {FS=":"}; {printf "\033[36m%-30s\033[0m %s\n", $1, $2}'
}

# -----------------------------------------------------------------------------
# Main logic
# -----------------------------------------------------------------------------
echo -e "\nSerene  Builder Version $VERSION"
echo -e "\nCopyright (C) 2019-2023"
echo -e "Sameer Rahmani <lxsameer@gnu.org>"
echo -e "Serene comes with ABSOLUTELY NO WARRANTY;"
echo -e "This is free software, and you are welcome"
echo -e "to redistribute it under certain conditions;"
echo -e "for details take a look at the LICENSE file.\n"

# Find the subcommand in the functions and run we find it.
for fn in $(fn-names); do
    if [[ $fn == "$command" ]]; then
        eval "$fn ${*:2}"
        exit $?
    fi
done

# If we couldn't find the command print out the help message
help