Minetest:Install
From Rabbi Blog
Folders & Files required to move from previous install
minetest.conf Depending on version: data/mods or /minetest4/games/mesetint/mods Entire world directory
Start new build and migrate
Backup the current directory and move the contents to the side
Run Minetest:Backup script
mv minetest4 minetest4_preupdate
Get the build and compile in its own directory
wget minetestc55_201203202107-0~1301~maverick1.tar.gz
tar -zxvf minetestc55_201203202107-0~1301~maverick1.tar.gz
mv recipe-201203202107-0~\{revno\}/ minetest4_build
cd minetest4_build
cmake . -DRUN_IN_PLACE=1
make -j2
Create new minetest4 directory and copy essential files from minetest4_preupdate into it
mkdir minetest4
copy bin, games, builtin folder from minetest4_build to minetest4
copy minetest.conf and mods from minetest4_prebuild to minetest4/minetest4/games/mesetint/mods
Be careful not to migrate the following mod directories:
bucket, default, legacy, experimental, give_initial_stuff
Run bin/minetestserver and verify all the mods work correctly