Respect the environment variable XDG_CACHE_HOME

This is needed in order to follow the XDG Base Directory specification.
More info here:

  https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html

1 files changed, 2 insertions, 1 deletions

diff --git a/src/luarocks/core/cfg.lua b/src/luarocks/core/cfg.lua
index 3c672693..7ea86542 100644
--- a/src/luarocks/core/cfg.lua
+++ b/src/luarocks/core/cfg.lua
@@ -385,7 +385,8 @@ local function make_defaults(lua_version, target_cpu, platforms, home)
       }
       defaults.export_path_separator = ":"
       defaults.wrapper_suffix = ""
-      defaults.local_cache = home.."/.cache/luarocks"
+      local xdg_cache_home = os.getenv("XDG_CACHE_HOME") or home.."/.cache"
+      defaults.local_cache = xdg_cache_home.."/luarocks"
       if not defaults.variables.CFLAGS:match("-fPIC") then
          defaults.variables.CFLAGS = defaults.variables.CFLAGS.." -fPIC"
       end