run

#!/bin/sh 

project_name='glprogram'
builddir_default='./build'
if [ -z ${builddir+x} ]; then 
    builddir=$builddir_default 
fi 
# https://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash
if [ -z ${cpu_count+x} ]; then 
    cpu_count=$(lscpu | grep -E '^CPU\(s):' | tr -s ' ' | cut -d ' ' -f2 | awk '{print $1/2}')
fi 
# https://gist.github.com/waylan/4080362
run_configure() {
    # https://stackoverflow.com/questions/70880484/cmake-print-root-project-name-using-cmake-commandline
    if [ "$1" = "release" ]; then
        local MORE_ARGS=-DDEBUG=OFF
    else 
        local MORE_ARGS=-DDEBUG=ON 
    fi 
    command cmake -DPROJECT_NAME=$project_name . -B $builddir $MORE_ARGS $@ 
}

# always uses half of present CPUs to perform compilation. Override 
run_build() {
    command cmake -DPROJECT_NAME=$project_name . -B $builddir/release -DDEBUG=OFF  
    command cmake --build build/release $@
}

run_release() {
    run_build
    command ./build/release/$project_name
}

run_clean() {
    if [ ! -d "$builddir/CMakeFiles" ] && [ ! -d "$builddir/release/CMakeFiles" ]; then 
        echo "This folder is not configured by CMake. Please verify that this folder is your actual build folder, and delete it via your directory/file removal command (usually \`rm\`)" 
    else 
        command rm -r $builddir
    fi 
}

# maybe integrate this with the configure subcmd
run_debug() {
    command cmake -DPROJECT_NAME=$project_name -DDEBUG=ON . -B $builddir $@
}

run() {
    if [ ! -d "$builddir/CMakeFiles" ]; then 
        run_configure 
    fi
    command cmake --build $builddir -- -j $cpu_count $@ \
        && ./$builddir/$project_name $@
}

run_with() {
    run $@ 
}

subcmd=$1 
case $subcmd in 
    "-h" | "--help")
        echo "Usage: $0 [SUBCOMMAND] [ARGS]..."
        echo "Basic CMake bootstrapper. All rights reserved."
        echo ""
        echo "All subcommands listed can be passed arguments, except base \`$0\`," 
        echo "which must be run with \`$0 with [ARGS]\` to pass args directly to your" 
        echo "target program."
        echo "By default, \`$0\` configures, builds, and runs your program via "
        echo "the default arguments/values."
        echo ""
        echo "configure \t\t Configure target directly (default ./$builddir)"
        echo "build     \t\t Build the target. Uses <total CPUs>/2 jobs, can"
        echo "          \t\t be overriden by setting core_count=<# of cores>".
        echo "with      \t\t Calls base run command, whilst passing [ARGS] "
        echo "          \t\t to target program."
        echo "TODO REWRITE THIS"
        ;;
    "")
        run $@ 
        ;;    
    *)
    shift 
    run_${subcmd} $@
esac