#!/bin/bash

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

# `.cpp` files in src/lib will be automatically picked up and compiled into
# dynamically linked libraries.
echo "Building libs..."
mkdir -pv bin/lib
for lib in $(find ./src/lib -name "*.cpp"); do
    COMPILE_COMMAND="$CXX_WITH_FLAGS -fPIC -shared -o $(sed -e 's/^.\/src/.\/bin/;s/cpp$/so/' <<< $lib) $lib"
    echo $COMPILE_COMMAND
    $COMPILE_COMMAND &
done

wait

# Commands for every program need to be given individually because we can't
# just add all shared libraries to all programs.
# Or can we? Idk, cba to find out.

# How to build a tool: Tell the compiler where to find shared libraries and
#   which libraries to use.
# Example: shared libraries are in bin/lib => -Lbin/lib
#   one of the libraries in that directory is nbt.so => use with -l:nbt.so
# How to run a tool: specify the library path to use for the dynamic linker
#   when running a program
# Example: LD_LIBRARY_PATH=bin/lib bin/tools/dumpnbt
echo "Building tools..."
mkdir -pv bin/tools
# add compile commands to this variable
COMPILE_COMMANDS="
set -v
$CXX_WITH_FLAGS src/tools/dumpnbt.cpp -Lbin/lib -l:nbt.so -o bin/tools/dumpnbt &
"
sh <<< $COMPILE_COMMANDS