From 4ec1fbf2017e9f7f1e28bec1d38ef9468136aafb Mon Sep 17 00:00:00 2001
From: Vasily <vautkin@teknik.io>
Date: Sat, 20 Apr 2019 21:39:09 +0200
Subject: [PATCH] Add noX11 flag to Linux compilations

This allows users that are not using X11 to still compile the
application.
---
 build_scripts/linux/build_linux.sh |  2 +-
 build_scripts/linux/configure.sh   |  3 +++
 build_scripts/qt/sources.pri       | 11 ++++++++---
 docs/building_for_linux.md         |  1 +
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/build_scripts/linux/build_linux.sh b/build_scripts/linux/build_linux.sh
index fa8e7bc..b369e4c 100755
--- a/build_scripts/linux/build_linux.sh
+++ b/build_scripts/linux/build_linux.sh
@@ -9,7 +9,7 @@ echo $MAKE_COMMAND
 mkdir -p $BUILD_DIR
 cd $BUILD_DIR
 qmake --version
-qmake -spec $QMAKE_SPEC $PROJECT_DIR
+qmake -spec $QMAKE_SPEC $PROJECT_DIR $QMAKE_EXTRAS
 $MAKE_COMMAND
 $CLANG_TIDY
 cp -r $PROJECT_DIR/src/res $BUILD_DIR/bin/linux/AdvancedSettings/
diff --git a/build_scripts/linux/configure.sh b/build_scripts/linux/configure.sh
index 7ffdac5..6e8e9f6 100644
--- a/build_scripts/linux/configure.sh
+++ b/build_scripts/linux/configure.sh
@@ -18,3 +18,6 @@ else
     CLANG_TIDY="$SCRIPT_DIR/run-clang-tidy.sh"
 fi
 
+if [[ -n $NO_X11 ]]; then
+    QMAKE_EXTRAS='CONFIG+=noX11'
+fi
diff --git a/build_scripts/qt/sources.pri b/build_scripts/qt/sources.pri
index 0fcc1d9..bed2abb 100644
--- a/build_scripts/qt/sources.pri
+++ b/build_scripts/qt/sources.pri
@@ -54,9 +54,14 @@ win32 {
 }
 
 unix:!macx {
-    SOURCES += src/tabcontrollers/keyboardinput/KeyboardInputX11.cpp
-    CONFIG += x11
-    LIBS += -lXtst
+    !noX11 {
+        SOURCES += src/tabcontrollers/keyboardinput/KeyboardInputX11.cpp
+        CONFIG += x11
+        LIBS += -lXtst
+    }
+    else {
+        SOURCES += src/tabcontrollers/keyboardinput/KeyboardInputDummy.cpp
+    }
 }
 
 macx {
diff --git a/docs/building_for_linux.md b/docs/building_for_linux.md
index e78286e..24ed7c5 100644
--- a/docs/building_for_linux.md
+++ b/docs/building_for_linux.md
@@ -143,6 +143,7 @@ The following environmental variables are relevant for building the project.
 | --------------------  | ------------- |
 | `QMAKE_SPEC`              | The [mkspec](https://forum.qt.io/topic/70970/what-is-mkspecs-used-for-how-to-configure-for-my-hardware) to compile to. Either `linux-g++` or `linux-clang`. Defaults to `linux-g++`.   |
 | `USE_TIDY`              | If set a compilation database will be created and the project linted. Can only be used with `clang`.  |
+| `NO_X11`              | If set the application will be compiled without X11 specific libraries. This disables certain things like sending keystrokes from VR.  |
 
 If an environment variable isn't set a default value will be provided. The default values are shown in the table below.