From ee538ca30d9403e94bc320fde938eab26b9ce1df Mon Sep 17 00:00:00 2001
From: Nat Quayle Nelson <natquaylenelson@gmail.com>
Date: Thu, 30 May 2024 11:41:49 -0600
Subject: [PATCH] linux: clone and build TGUI submodule if necessary

---
 README.md  |  3 ++-
 SConstruct | 31 ++++++++++++++++++++++++++++---
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 6d4f34e0..fa2ebf03 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,8 @@ The following dependencies are required:
 - ZLib - This is included with the system on the Mac.
 
 For Linux builds, the following additional dependencies are required:
-- [TGUI](https://tgui.eu/) - version 0.9 or later required
+- [TGUI](https://tgui.eu/) - version 0.9, **built with C++14** as shown [here](./.github/workflows/scripts/linux/install-tgui.sh)
+  - or, if cmake is available when you call `scons`, TGUI will be built from source automatically
 - zenity command-line tools
 
 If you are using the Visual Studio toolset, we recommend installing
diff --git a/SConstruct b/SConstruct
index 5efb5c9d..82df67d1 100644
--- a/SConstruct
+++ b/SConstruct
@@ -221,12 +221,15 @@ if platform == 'darwin':
 # Sometimes it's easier just to copy the dependencies into the repo dir
 # We try to auto-detect this.
 if path.exists('deps/lib'):
-	env.Append(LIBPATH=['deps/lib'])
+	env.Append(LIBPATH=[os.getcwd() + '/deps/lib'])
 	if platform == 'darwin':
-		env.Append(FRAMEWORKPATH=['deps/lib'])
+		env.Append(FRAMEWORKPATH=[os.getcwd() + '/deps/lib'])
+
+if path.exists('deps/lib64'):
+	env.Append(LIBPATH=[os.getcwd() + '/deps/lib64'])
 
 if path.exists('deps/include'):
-	env.Append(CPPPATH=['deps/include'])
+	env.Append(CPPPATH=[os.getcwd() + '/deps/include'])
 
 # Include directories
 
@@ -299,6 +302,28 @@ if not env.GetOption('clean'):
 	check_lib('sfml-audio', 'SFML-audio')
 	check_lib('sfml-graphics', 'SFML-graphics')
 
+	# On Linux, build TGUI from the subtree if necessary
+	if platform == 'posix':
+		def check_tgui(conf, second_attempt=False):
+			if conf.CheckLib('libtgui', language='C++'):
+				return conf
+			else:
+				if second_attempt:
+					print('TGUI is missing, even after trying to build it!')
+					Exit(1)
+				else:
+					subprocess.call(["git", "submodule", "update", "--init", "deps/TGUI"])
+					subprocess.call(["cmake", "-D", "TGUI_CXX_STANDARD=14", "-D", "CMAKE_INSTALL_PREFIX=../", "."], cwd="deps/TGUI")
+					subprocess.call(["make"], cwd="deps/TGUI")
+					subprocess.call(["make", "install"], cwd="deps/TGUI")
+
+					env = conf.Finish()
+					env.Append(CPPPATH=[os.getcwd() + '/deps/include'], LIBPATH=[os.getcwd() + '/deps/lib', os.getcwd() + '/deps/lib64'])
+					conf = Configure(env)
+					return check_tgui(conf, True)
+		conf = check_tgui(conf)
+
+
 	env = conf.Finish()
 
 env.Append(CPPDEFINES=["TIXML_USE_TICPP"])