Add new build scripts for windows

The old build scripts used hard coded directory paths, didn't check if
the paths actually existed and didn't differentiate between compiling,
deploying libraries and packaging for release.

The new build scripts are split into three different files. They are all
longer than the old build scripts, but most of the extra lines are
error checking, which the old one lacked.

It was considered writing the build scripts in another language like
Python or Powershell, but the relatively small size of the project and
unlikelihood of the build systems needing to grow massively means that a
very simple imperative language like the Microsoft scripting language is
fine.

build_scripts/win/deploy_windows.cmd

@@ -0,0 +1,119 @@
+@echo off
+REM Echo off to avoid spam.
+
+REM Non zero is failure, 0 is success.
+SET exit_code_success=0
+SET exit_code_failure_build_apps=1
+SET exit_code_failure_build_locations=2
+
+SET output_dir="\bin\win64\"
+
+REM Used for echos.
+SET current_activity=DEPLOY
+
+REM If scripts are chain called the original dirs should not be overwritten.
+IF NOT DEFINED original_dir (
+    SET original_dir=%CD%
+)
+IF NOT DEFINED project_dir (
+    REM Arg 0 (called %0) is the full path to the file.
+    REM https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/call#batch-parameters
+    REM As per above link, %~dp0 expands the zeroth arg to a drive letter and path only.
+    SET folder_path=%~dp0
+    REM Project dir is up two dirs from the file.
+    SET project_dir=%folder_path%\..\..\
+)
+
+ECHO %current_activity%: Testing if all required build environment values are set:
+IF NOT DEFINED QT_LOC (
+    ECHO %current_activity%: QT_LOC not defined. Using default value.
+    SET QT_LOC="C:\Qt\5.11.1\msvc2017_64\bin\"
+)
+ECHO %current_activity%: QT_LOC set to '%QT_LOC%'.
+IF EXIST %QT_LOC% (
+    ECHO %current_activity%: QT_LOC exists.
+) ELSE (
+    ECHO %current_activity%: QT_LOC directory does not exist. Exiting.
+    EXIT /B %exit_code_failure_build_locations%
+)
+
+ECHO %current_activity%: All required build environment values are set.
+
+IF NOT EXIST %project_dir%\%output_dir% (
+    ECHO %current_activity%: Output dir '%output_dir%' does not exist. Creating.
+    mkdir %project_dir%\%output_dir%
+    ECHO %current_activity%: Output dir created.
+)
+
+cd %project_dir%\%output_dir%
+
+IF DEFINED BUILD_DEBUG (
+    ECHO %current_activity%: BUILD_DEBUG var set. Compiling for debug.
+    SET compile_level=debug
+) ELSE (
+    ECHO %current_activity%: BUILD_DEBUG var not set. Compiling for release.
+    SET compile_level=release
+)
+
+ECHO %current_activity%: Running windeployqt:
+
+REM windeployqt requires the QT\bin location to be in the path.
+REM Changing the PATH var is not ideal, but windeployqt does not work otherwise.
+set original_path=%PATH%
+set PATH=%QT_LOC%;%PATH%
+
+REM Caret newline (^CFLR) splits a command over several lines.
+REM This is done to avoid one ultra long line.
+
+windeployqt --dir AdvancedSettings\qtdata ^
+--libdir AdvancedSettings ^
+--plugindir AdvancedSettings\qtdata\plugins ^
+--no-system-d3d-compiler ^
+--no-opengl-sw ^
+--%compile_level% ^
+--qmldir ..\..\src\res\qml\ ^
+AdvancedSettings\AdvancedSettings.exe
+
+REM windeployqt does not exit on error by itself.
+IF ERRORLEVEL 1 EXIT /B %exit_code_failure_build_apps%
+REM Return the PATH to original as quickly as possible.
+set PATH=%original_path%
+ECHO %current_activity%: windeployqt done.
+
+REM Switches used for copy:
+REM /V Verifies that files have been copied correctly.
+REM /Q Suppresses xcopy spam.
+REM /Y Skips the overwrite yes prompt.
+REM /E Copies all subdirs, even if they are empty.
+REM /I "If Source is a directory or contains wildcards and Destination does not exist,
+REM     xcopy assumes Destination specifies a directory name and creates a new directory.
+REM     Then, xcopy copies all specified files into the new directory. By default,
+REM     xcopy prompts you to specify whether Destination is a file or a directory."
+
+ECHO %current_activity%: Copying necessary files.
+copy /V /Y "%project_dir%\Readme.md" "%project_dir%\%output_dir%\AdvancedSettings\Readme.md"
+ECHO %current_activity%: README copied.
+
+REM All three licenses must be included in binary releases, as per the terms.
+copy /V /Y "%project_dir%\LICENSE" "%project_dir%\%output_dir%\AdvancedSettings\LICENSE-GPL.txt"
+copy /V /Y "%project_dir%\third-party\openvr\LICENSE" "%project_dir%\%output_dir%\AdvancedSettings\LICENSE-VALVE.txt"
+copy /V /Y "%project_dir%\third-party\easylogging++\LICENSE" "%project_dir%\%output_dir%\AdvancedSettings\LICENSE-MIT.txt"
+ECHO %current_activity%: LICENSE files copied.
+
+xcopy /Q /Y /E /I /V "%project_dir%\src\res" "%project_dir%\%output_dir%\AdvancedSettings\res\"
+ECHO %current_activity%: Resource files copied.
+
+copy /V /Y "%project_dir%\src\restartvrserver.bat" "%project_dir%\%output_dir%\AdvancedSettings\restartvrserver.bat"
+copy /V /Y "%project_dir%\src\startdesktopmode.bat" "%project_dir%\%output_dir%\AdvancedSettings\startdesktopmode.bat"
+ECHO %current_activity%: Extra batch files copied.
+
+copy /V /Y "%project_dir%\src\qt.conf" "%project_dir%\%output_dir%\AdvancedSettings\qt.conf"
+copy /V /Y "%project_dir%\src\manifest.vrmanifest" "%project_dir%\%output_dir%\AdvancedSettings\manifest.vrmanifest"
+ECHO %current_activity%: VR specific configuration files copied.
+
+copy /V /Y "%project_dir%\third-party\openvr\bin\win64\openvr_api.dll" "%project_dir%\%output_dir%\AdvancedSettings\openvr_api.dll"
+ECHO %current_activity%: OpenVR .dll copied.
+
+cd %original_dir%
+
+ECHO %current_activity%: %current_activity% DONE.