#!/bin/sh

cd "$(dirname "$0")" || exit 1

# some environments have cmake v2 as 'cmake' and v3 as 'cmake3'
# check for cmake3 first then fallback to just cmake

B_CMAKE=$(command -v cmake3 2>/dev/null)
if [ "$?" -eq 0 ]; then
    # Continue, cmake3 exists in $PATH.
    continue
else
    # OK, so cmake3 isn't in path, so let's test to see if `cmake` itself exists, before proceeding.
    if command -v cmake 2>/dev/null; then
        B_CMAKE=$(command -v cmake)
        # We have a cmake executable available, now let's proceed!
    else
        # As self-explanatory, the cmake executable isn't available, so we should fail here.
        echo "ERROR: CMake not in $PATH, cannot build! Please install CMake, or if this persists, file a bug report."
        exit 1
    fi
fi

# Set default build type, but in CI, this is set to Release.
# For downstream distributions, our recommendation is to set this type in your build scripts to Release, and supply Debug build types in your debug packages.

B_BUILD_TYPE=${B_BUILD_TYPE:-Debug}

if [ "$(uname)" = "Darwin" ]; then
    # macOS needs a little help, so we source this environment script to fix paths.
    if [ ! -e "./macOS_environment.sh" ]; then
        echo "macOS environment script not found, this isn't meant to happen!"
        exit 1
    else
        . ./macOS_environment.sh
    fi

    B_CMAKE_FLAGS="-DCMAKE_OSX_SYSROOT=$(xcode-select --print-path)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -DCMAKE_OSX_DEPLOYMENT_TARGET=10.9 ${B_CMAKE_FLAGS:-}"
fi

# Source local build variables to the environment, if available.
# If not, continue as normal, and silently.
if [ -e "./build_env.sh" ]; then
    . "./build_env.sh"
fi

# Initialise Git submodules
git submodule update --init --recursive

B_CMAKE_FLAGS="-DCMAKE_BUILD_TYPE=${B_BUILD_TYPE} ${B_CMAKE_FLAGS:-}"

# Clear build directory, but do a conditional first!

if [ -d "./build" ]; then
    rm -rf ./build
fi

# Previous versions of this script created the build directory, and CD'd into it - CMake allows us to do this another way...

# Note: If you use Ninja (i.e, cmake -GNinja -B build), run Ninja like: "ninja -C build", just like you would with Meson.

$B_CMAKE "$B_CMAKE_FLAGS" -B build || exit 1


echo "INFO: Now commencing Barrier build process..."
echo "INFO: We're building an $B_BUILD_TYPE output type."
$(command -v make) -C build || exit 1

# Implictly, we assume the build was successful due to no exits.
# Later revisions of this script should do conditionals. TODO.

echo "INFO: Success! The build completed successfully!"

exit