player: use XDG_CACHE_HOME by default

This adds cache as a possible path for mpv to internally pick
(~/.cache/mpv for non-darwin unix-like systems, the usual config
directory for everyone else). For gpu shader cache and icc cache,
controlling whether or not to write such files is done with the new
--gpu-shader-cache and --icc-cache options respectively. Additionally,
--cache-on-disk no longer requires explicitly setting the --cache-dir
option. The old options, --cache-dir, --gpu-shader-cache-dir, and
--icc-cache-dir simply set an override for the directory to save cache
files. If unset, then the cache is saved in XDG_CACHE_HOME.

1 files changed, 1 insertions, 0 deletions

diff --git a/common/global.h b/common/global.h
index a7e4c4cee8..09b59593b0 100644
--- a/common/global.h
+++ b/common/global.h
@@ -10,6 +10,7 @@ struct mpv_global {
     struct mp_client_api *client_api;
     char *configdir;
     struct stats_base *stats;
+    bool no_cachedir;
     bool no_statedir;
 };