Coc.nvim: Use XDG Base Directories for storing data on Freedesktop-compatible systems (e.g. Linux)

[jmacmahon]

User data is currently stored in $HOME/.config/coc. This is non-standard; $XDG_DATA_HOME should be used instead.

Is your feature request related to a problem? Please describe.

The GNOME project has a good list of the problems caused by not using the standard XDG base directories.

Describe the solution you'd like

User data stored in $XDG_DATA_HOME on supporting systems.

Describe alternatives you've considered

User data could be stored somewhere under .vim. This seems like a less standards-compliant approach and has a potential to be conflated with manual configuration files.

Additional context

Reference specification
Summary of XDG base directories on the Arch Linux Wiki
GNOME project's usage guide

[fannheyward]

Currently, we use $XDG_CONFIG_HOME for config home.

[samhh]

@fannheyward There's a lot of stuff in there that belongs in XDG_DATA_HOME as the original poster said. A concrete example is history.json - this is not in any sense configuration.

[jmacmahon]

Just noticed that my patch for this was nonsense, so fixed the commit.

@fannheyward re: your point, this is about user data, not config. There is a separation of these concepts within coc.nvim -- the functions coc#util#get_data_home vs. coc#util#get_config_home are separate.

As the code stands, we use $XDG_CONFIG_HOME for user data as well as config, which is non-standard. This patch fixes this by using $XDG_DATA_HOME, which is standard.

Please re-open.

[chemzqm]

It is non-standard on your system, but this change would make many current user would experience extensions not work at all.
We choose XDG_CONFIG_HOME since the files are not only data, but also extensions.
You can use let g:coc_data_home = $XDG_DATA_HOME."/coc" in your vimrc.

[jmacmahon]

Extensions managed by coc.nvim are user data. If an application is
storing an entire checkout of a git repository, it cannot be considered
simply config. This is user data.

This is not just non-standard on my system, but rather on all
Freedesktop-compatible systems.

On Thu, 20 Aug 2020 at 12:14, Qiming zhao [e-mail] wrote:

Closed #2245 https://github.com/neoclide/coc.nvim/issues/2245.

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[oblitum]

IMO, the request is understandable, but seems a rather breaking/problematic change for all current coc.nvim users, that matter more than sticking to some not-so-relevant directory pattern (few users are currently bothered about that). So maybe this is worth being considered for a breaking-change release, in some remote future?