Without this "sysinit uses VIM if XDG_CONFIG_DIRS unset" fails with an
existing `/etc/xdg/nvim/sysinit.vim` file, because `XDG_CONFIG_DIRS=` is
not considered, but the default ("/etc/xdg") used then.
On Windows we store non-config data in "$XDG_DATA_HOME/nvim-data". But
the "…/site" items in 'runtimepath' did not correctly point to that
location, they used "…/nvim/site".
Fix the init logic to use "…/nvim-data/site".
closes#9910
After #4964 environment variables in the XDG "fallback" table are no
longer expanded.
Fallback to correctly expanded $LOCALAPPDATA, $TEMP. If that fails
(unlikely), fallback to hard-coded paths (e.g. ~/AppData/Local).
Closes#5255
The previous defaults were including the nvim suffix, causing it to
apear twice in the final paths.
kXDGDataHome and kXDGConfigHome are now set as %LOCALAPPDATA%,
kXDGCacheHome is set as $TEMP.
In Windows there is no distinction between configuration and data
storage, but we don't want to place all files under the same path.
get_xdg_home() now appends a different path suffix for kXDGDataHome.
- Configuration files are saved under %LOCALAPPDATA%\nvim
- Data files are saved under %LOCALAPPDATA%\nvim-data
This is none of option.c business to create *possibly unneeded* **default**
directories **before** user specified where he actually wants to place the
files.
- Add functions that are able to query XDG.
- Replace defaults for
- &runtimepath. Does not follow #78.
- &viewdir.
- &undodir.
- &directory.
- &backupdir. Does not follow #78.
- vimrc location.
- Remove user vimrc file line from :version message.
