#!/bin/sh
set -eu

project_root=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
meson_bin=${MESON_BIN:-meson}
meson_dir=$(CDPATH= cd -- "$(dirname -- "$meson_bin")" && pwd)
profile=${MFEM_MATRIX_PROFILE:-portable}
jobs=${MFEM_JOBS:-4}

compiler_family() {
    "$1" --version 2>&1 | sed -n '1p'
}

require_clang() {
    version=$(compiler_family "$1")
    case "$version" in
        *clang*|*Clang*) ;;
        *) echo "error: $1 is not a Clang compiler: $version" >&2; exit 2 ;;
    esac
}

require_gnu() {
    version=$(compiler_family "$1")
    case "$version" in
        *gcc*|*GCC*|*"Free Software Foundation"*) ;;
        *) echo "error: $1 is not a GNU compiler: $version" >&2; exit 2 ;;
    esac
}

run_configuration() {
    name=$1
    c_compiler=$2
    cxx_compiler=$3
    mode=$4
    build_dir="$project_root/build-$name"

    if test -f "$build_dir/meson-private/coredata.dat"; then
        wipe_flag=--wipe
    else
        wipe_flag=
    fi
    env PATH="$meson_dir:$PATH" CC="$c_compiler" CXX="$cxx_compiler" \
        "$meson_bin" setup $wipe_flag "$build_dir" "$project_root" \
            --buildtype="$mode" \
            -Dallow_preinstalled=false \
            -Dfeature_profile="$profile" \
            -Dbuild_examples=true \
            -Dbuild_tests=true \
            -Dbuild_python=false \
            -Djobs="$jobs"
    env PATH="$meson_dir:$PATH" "$meson_bin" compile -C "$build_dir"
    env PATH="$meson_dir:$PATH" "$meson_bin" test -C "$build_dir" --print-errorlogs
}

clang_cc=${CLANG_CC:-clang}
clang_cxx=${CLANG_CXX:-clang++}
gcc_cc=${GNU_CC:-gcc}
gcc_cxx=${GNU_CXX:-g++}

require_clang "$clang_cxx"
require_gnu "$gcc_cxx"

run_configuration clang-debug "$clang_cc" "$clang_cxx" debug
run_configuration clang-release "$clang_cc" "$clang_cxx" release
run_configuration gcc-debug "$gcc_cc" "$gcc_cxx" debug
run_configuration gcc-release "$gcc_cc" "$gcc_cxx" release