find-love.sh

#!/bin/sh
#
# A linux-only script for running a love file using the correct engine binary
# This script's working directory must be the bundled love's one and it'll set 
# everything up by itself

# Order priority goes as follows:
# 1. love if its not too old, if too old or missing then
# 2. bundled love, if missing then
# 3. love even tho we know its old, if missing then
# 4. love2d is always too old, but it is used as a last resource, if missing just cry

if command -v love >/dev/null 2>&1; then
    # Get installed love version
    LOVE_VER=$(love --version | awk '{split($0,ver," "); print ver[2]}')
    LOVE_VER_MAJ=$(echo "$LOVE_VER" | awk '{split($0,mver,"."); print mver[1]}')
    LOVE_VER_MIN=$(echo "$LOVE_VER" | awk '{split($0,mver,"."); print mver[2]}')

    # Get bundled love version
    if [ -f "love" ]; then
        BUN_LOVE_VER=$(./love --version | awk '{split($0,ver," "); print ver[2]}')
        BUN_LOVE_VER_MAJ=$(echo "$BUN_LOVE_VER" | awk '{split($0,mver,"."); print mver[1]}')
        BUN_LOVE_VER_MIN=$(echo "$BUN_LOVE_VER" | awk '{split($0,mver,"."); print mver[2]}')
        # Compare versions
        if [ "$LOVE_VER_MAJ" -gt "$BUN_LOVE_VER_MAJ" ] ||
             { [ "$LOVE_VER_MAJ" -eq "$BUN_LOVE_VER_MAJ" ] && [ "$LOVE_VER_MIN" -ge "$BUN_LOVE_VER_MIN" ]; }; then
            cd "$(dirname "$1")" || exit 1
            echo "Using system wide love installation"
            love --fused "$@" # Go with it
            exit
        fi # Too old, check other options
    else # if no bundled love, just use it
        echo "Using system wide love installation, unknown target version"
        cd "$(dirname "$1")" || exit 1
        love --fused "$@"
        exit
    fi
fi
if [ -f "love" ]; then
    echo "Using bundled love"
    ORIG_DIR=$(pwd)
    cd "$(dirname "$1")" || exit 1
    "$ORIG_DIR"/love --fused "$@"
elif command -v love >/dev/null 2>&1; then # We know it is old, but go for it anyway
    echo "Using oudated system wide love installation"
    cd "$(dirname "$1")" || exit 1
    love --fused "$@"
elif command -v love2d >/dev/null 2>&1; then
    echo "Using love2d, trouble incoming (hopefully not)"
    cd "$(dirname "$1")" || exit 1
    love2d --fused "$@"
else
    echo "love2d not found!"
    exit 1
fi