From 27e3d0174139b99da9e6afad1ba6fffff95ff3a9 Mon Sep 17 00:00:00 2001
From: Miko <mikoxyzzz@gmail.com>
Date: Sat, 20 Nov 2021 20:10:36 +0100
Subject: [PATCH] Readd "lin-system" and LAUNCHER_LINUX_DATADIR

During the debranding of MultiMC, peterix removed the "lin-system"
layout and LAUNCHER_LINUX_DATADIR (previously known as
MULTIMC_LINUX_DATADIR.) This patch reverts those two changes.

Signed-off-by: Miko <mikoxyzzz@gmail.com>
---
 CMakeLists.txt           | 20 ++++++++++++++++++--
 launcher/Application.cpp |  8 +++++++-
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0cf93758..2fc38b59 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -140,8 +140,8 @@ endif()
 ####################################### Install layout #######################################
 
 # How to install the build results
-set(Launcher_LAYOUT "auto" CACHE STRING "The layout for the launcher installation (auto, win-bundle, lin-nodeps, mac-bundle)")
-set_property(CACHE Launcher_LAYOUT PROPERTY STRINGS auto win-bundle lin-nodeps mac-bundle)
+set(Launcher_LAYOUT "auto" CACHE STRING "The layout for the launcher installation (auto, win-bundle, lin-nodeps, lin-system, mac-bundle)")
+set_property(CACHE Launcher_LAYOUT PROPERTY STRINGS auto win-bundle lin-nodeps lin-system mac-bundle)
 
 if(Launcher_LAYOUT STREQUAL "auto")
     if(UNIX AND APPLE)
@@ -206,6 +206,22 @@ elseif(Launcher_LAYOUT_REAL STREQUAL "lin-nodeps")
     configure_file(launcher/Launcher.in "${CMAKE_CURRENT_BINARY_DIR}/LauncherScript" @ONLY)
     install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/LauncherScript" DESTINATION ${BUNDLE_DEST_DIR} RENAME ${Launcher_Name})
 
+elseif(Launcher_LAYOUT_REAL STREQUAL "lin-system")
+	set(Launcher_APP_BINARY_NAME "devlauncher" CACHE STRING "Name of the Launcher binary")
+	set(Launcher_BINARY_DEST_DIR "bin" CACHE STRING "Path to the binary directory")
+	set(Launcher_LIBRARY_DEST_DIR "lib${LIB_SUFFIX}" CACHE STRING "Path to the library directory")
+	set(Launcher_SHARE_DEST_DIR "share/devlauncher" CACHE STRING "Path to the shard data directory")
+	set(JARS_DEST_DIR "${Launcher_SHARE_DEST_DIR}/jars")
+
+	set(BINARY_DEST_DIR ${Launcher_BINARY_DEST_DIR})
+	set(LIBRARY_DEST_DIR ${Launcher_LIBRARY_DEST_DIR})
+
+	MESSAGE(STATUS "Compiling for linux system with ${Launcher_SHARE_DEST_DIR} and LAUNCHER_LINUX_DATADIR")
+	SET(Launcher_APP_BINARY_DEFS "-DMULTIMC_JARS_LOCATION=${CMAKE_INSTALL_PREFIX}/${JARS_DEST_DIR}" "-DLAUNCHER_LINUX_DATADIR")
+
+	# install as bundle with no dependencies included
+	set(INSTALL_BUNDLE "nodeps")
+
 elseif(Launcher_LAYOUT_REAL STREQUAL "win-bundle")
     set(BINARY_DEST_DIR ".")
     set(LIBRARY_DEST_DIR ".")
diff --git a/launcher/Application.cpp b/launcher/Application.cpp
index 8789d096..6ef64762 100644
--- a/launcher/Application.cpp
+++ b/launcher/Application.cpp
@@ -304,7 +304,13 @@ Application::Application(int &argc, char **argv) : QApplication(argc, argv)
     }
     else
     {
-#if defined(Q_OS_MAC)
+#ifdef LAUNCHER_LINUX_DATADIR
+        QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
+        if (xdgDataHome.isEmpty())
+            xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
+        dataPath = xdgDataHome + "/multimc";
+        adjustedBy += "XDG standard " + dataPath;
+#elif defined(Q_OS_MAC)
         QDir foo(FS::PathCombine(applicationDirPath(), "../../Data"));
         dataPath = foo.absolutePath();
         adjustedBy += "Fallback to special Mac location " + dataPath;
-- 
2.34.0