Add Linux install script

scripts/install-linux.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+# This script downloads Lovely and Steamodded and installs all the files to the right directories,
+# then tries to update the launch options for Balatro by editing localconfig.vdf.
+# (TODO: This second step currently seems to fail. What gives?)
+
+set -e
+
+for app in "steam" "steamwebhelper"; do
+    if pgrep -x "$app" > /dev/null; then
+        echo "Error: $app is running. Please close Steam completely before running this script." >&2
+        exit 1
+    fi
+done
+
+steam_roots=(
+    ~/.local/share/Steam
+    ~/.var/app/com.valvesoftware.Steam/.local/share/Steam
+    ~/snap/steam/common/.local/share/Steam
+    ~/.steam/steam
+)
+
+for dir in "${steam_roots[@]}"; do
+    if [ -d "$dir" ]; then steam_root="$dir"; break; fi
+done
+
+if [ -z "$steam_root" ]; then
+    echo "No Steam installation found in known locations." >&2
+    exit 1
+fi
+
+balatro_path="$steam_root/steamapps/common/Balatro"
+if [ ! -d "$balatro_path" ]; then
+    echo "Balatro directory not found at $balatro_path" >&2
+    exit 1
+fi
+
+balatro_appdata_path="$steam_root/steamapps/compatdata/2379780/pfx/drive_c/users/steamuser/AppData/Roaming/Balatro/"
+if [ ! -d "$balatro_appdata_path" ]; then
+    echo "Balatro appdata directory not found at $balatro_appdata_path" >&2
+    exit 1
+fi
+
+localconfig_path=$(compgen -G "$steam_root/userdata/*/config/localconfig.vdf" | head -n 1)
+
+echo "Downloading Lovely..."
+lovely_url=$(curl -sL https://api.github.com/repos/ethangreen-dev/lovely-injector/releases/latest | grep -m1 -Eo 'https://[^#]+windows-msvc.zip' )
+curl -sL $lovely_url > lovely.zip
+unzip -oq lovely.zip
+rm lovely.zip
+
+echo "Downloading Steamodded..."
+smod_url=$(curl -sL https://api.github.com/repos/Steamodded/smods/releases/latest | grep -Eo 'https://.*zipball/[^"]+')
+curl -sL $smod_url > smod.zip
+unzip -oq smod.zip
+rm smod.zip
+
+# This somewhat hacky Perl script looks for Balatro in localconfig.vdf, removes any
+# existing LaunchOptions line, and adds a new one with the correct value.
+perl -ne '
+    $tabs = $` if /"2379780"$/;
+    if (/^$tabs"2379780"$/ .. /^$tabs\}$/) {
+        print qq($tabs\t"LaunchOptions"		"WINEDLLOVERRIDES=\"version=n,b\" %command%"\n) if /^$tabs\}$/;
+        print unless /"LaunchOptions"/;
+    } else { print; }
+' $localconfig_path > $localconfig_path.tmp
+
+if [ -n "$(diff $localconfig_path $localconfig_path.tmp)" ]; then
+    echo "Updating Balatro Steam launch options"
+    mv $localconfig_path.tmp $localconfig_path
+else
+    rm $localconfig_path.tmp
+fi
+
+echo "Installing..."
+mv version.dll $balatro_path/version.dll
+mkdir -p $balatro_appdata_path/Mods
+cp -r Steamodded-* $balatro_appdata_path/Mods/
+rm -r Steamodded-*
+echo "Done! 🃏"
+echo
+echo "You may still need to manually update the launch options in Steam:"
+echo ""
+echo "- Open Steam"
+echo "- Right click on Balatro"
+echo -e "- Select \x1b[33mProperties...\x1b[0m"
+echo -e "- Under \x1b[33mLaunch Options\x1b[0m, enter:"
+echo ""
+echo -e "  \x1b[33mWINEDLLOVERRIDES=\"version=n,b\" %command%\x1b[0m"