Fix faulty use of '&&' within variable-based shell commands.

build-minetest-here.sh

@@ -51,6 +51,9 @@ fi
 
 if [ ! -z "$INSTALL_DEPS" ]; then
     echo "* missing $INSTALL_DEPS"
+    if [ ! -z "$REFRESH_OS_INSTALLER_CMD" ]; then
+        echo "  * Running '$REFRESH_OS_INSTALLER_CMD'"
+    fi
     echo "  * Running '$DEPS_INSTALL'..."
     $DEPS_INSTALL
     if [ $? -ne 0 ]; then

mtbuild.rc

@@ -2,19 +2,25 @@
 FEDORA_DEPS="gcc-c++ irrlicht-devel gettext freetype cmake bzip2-devel libpng libjpeg-turbo libXxf86vm mesa-libGLU libsqlite3x-devel libogg-devel libvorbis-devel openal-devel curl-devel luajit-devel lua-devel leveldb-devel ncurses-devel redis hiredis-devel gmp-devel libtool"
 FEDORA_DEPS_INSTALL="sudo dnf install -y $FEDORA_DEPS"
 UBUNTU_DEPS="libncurses5-dev libgettextpo-dev doxygen libspatialindex-dev libpq-dev postgresql-server-dev-all git build-essential libirrlicht-dev libgettextpo0 libfreetype6-dev cmake libbz2-dev libpng12-dev libjpeg8-dev libxxf86vm-dev libgl1-mesa-dev libsqlite3-dev libogg-dev libvorbis-dev libopenal-dev libcurl4-openssl-dev libluajit-5.1-dev liblua5.1-0-dev libleveldb-dev"
-UBUNTU_DEPS_INSTALL="sudo apt-get update && sudo apt-get install -y $UBUNTU_DEPS"
+UBUNTU_DEPS_INSTALL="sudo apt-get install -y $UBUNTU_DEPS"
 DEPS_INSTALL_MSG="something like    $UBUNTU_DEPS_INSTALL     #or     $FEDORA_DEPS_INSTALL"
+REFRESH_OS_INSTALLER_CMD=
 if [ -f "`command -v dnf`" ]; then
     DEPS_INSTALL="$FEDORA_DEPS_INSTALL"
 elif [ -f "`command -v yum`" ]; then
     FEDORA_DEPS_INSTALL="sudo yum install -y $FEDORA_DEPS"
     DEPS_INSTALL="$FEDORA_DEPS_INSTALL"
 elif [ -f "`command -v apt`" ]; then
-    UBUNTU_DEPS_INSTALL="sudo apt update && sudo apt install -y $UBUNTU_DEPS"
+    REFRESH_OS_INSTALLER_CMD="sudo apt update"
+    UBUNTU_DEPS_INSTALL="sudo apt install -y $UBUNTU_DEPS"
     DEPS_INSTALL="$UBUNTU_DEPS_INSTALL"
 elif [ -f "`command -v apt-get`" ]; then
+    REFRESH_OS_INSTALLER_CMD="sudo apt-get update"
     DEPS_INSTALL="$UBUNTU_DEPS_INSTALL"
 fi
 if [ ! -z "$DEPS_INSTALL" ]; then
     DEPS_INSTALL_MSG="$DEPS_INSTALL"
+    if [ ! -z "$REFRESH_OS_INSTALLER_CMD" ]; then
+        DEPS_INSTALL_MSG="$REFRESH_OS_INSTALLER_CMD && $DEPS_INSTALL"
+    fi
 fi