Add self-extracting launcher for Windows

util/buildbot/buildwin32.sh

@@ -2,11 +2,12 @@
 set -e
 
 topdir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-if [ $# -ne 1 ]; then
-	echo "Usage: $0 <build directory>"
+if [ $# -lt 1 ]; then
+	echo "Usage: $0 <build directory> [extra cmake args...]"
 	exit 1
 fi
 builddir=$1
+shift
 mkdir -p $builddir
 builddir="$( cd "$builddir" && pwd )"
 libdir=$builddir/libs
@@ -63,6 +64,7 @@ cmake_args=(
 	-DENABLE_LEVELDB=1
 )
 add_cmake_libs
+cmake_args+=("$@")
 cmake -S $sourcedir -B build "${cmake_args[@]}"
 
 cmake --build build -j$(nproc)

util/buildbot/buildwin64.sh

@@ -2,11 +2,12 @@
 set -e
 
 topdir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-if [ $# -ne 1 ]; then
-	echo "Usage: $0 <build directory>"
+if [ $# -lt 1 ]; then
+	echo "Usage: $0 <build directory> [extra cmake args...]"
 	exit 1
 fi
 builddir=$1
+shift
 mkdir -p $builddir
 builddir="$( cd "$builddir" && pwd )"
 libdir=$builddir/libs
@@ -44,7 +45,7 @@ download "$libhost/llvm/libjpeg-$libjpeg_version-win64.zip"
 download "$libhost/llvm/libpng-$libpng_version-win64.zip"
 download "$libhost/llvm/sdl2-$sdl2_version-win64.zip"
 
-# Set source dir, downloading Minetest as needed
+# Set source dir, downloading Luanti as needed
 get_sources
 
 # Build the thing
@@ -63,6 +64,7 @@ cmake_args=(
 	-DENABLE_LEVELDB=1
 )
 add_cmake_libs
+cmake_args+=("$@")
 cmake -S $sourcedir -B build "${cmake_args[@]}"
 
 cmake --build build -j$(nproc)

util/ci/common.sh

@@ -32,6 +32,19 @@ install_linux_deps() {
 	fi
 }
 
+# Linux -> win32 cross-compiling only
+install_mingw_deps() {
+	local bits=$1
+	local nsis=$2
+
+	local pkgs=(gettext wine wine$bits)
+	[[ "$nsis" == "true" ]] && pkgs+=(nsis ccache)
+
+	sudo dpkg --add-architecture i386
+	sudo apt-get update
+	sudo apt-get install -y --no-install-recommends "${pkgs[@]}"
+}
+
 # macOS build only
 install_macos_brew_deps() {
 	# Uninstall the bundled cmake, it is outdated, and brew does not want to install the newest version with this one present since they are from different taps.
@@ -50,8 +63,8 @@ install_macos_brew_deps() {
 }
 
 install_macos_precompiled_deps() {
-	osver=$1
-	arch=$2
+	local osver=$1
+	local arch=$2
 
 	local pkgs=(
 		cmake wget