linux: store configuration in $XDG_CONFIG_HOME

Store configuration in $XDG_CONFIG_HOME. If unavailable, default to $HOME/.config .

Author: whizikxd

src/os/core/linux/os_core_linux.c

@@ -1573,8 +1573,17 @@ main(int argc, char **argv)
 
  // rjf: grab home directory
  {
- char *home = getenv("HOME");
- info->user_program_data_path = str8_cstring(home);
+ char *data_home = getenv("XDG_CONFIG_HOME");
+ if (data_home == 0 ||
+ cstring8_length((U8 *)data_home) == 0) {
+ // default to $HOME/.config
+ data_home = getenv("HOME");
+ info->user_program_data_path = push_str8f(os_lnx_state.arena, "%S/%S",
+ str8_cstring(data_home),
+ str8_lit(".config"));
+ } else {
+ info->user_program_data_path = str8_cstring(data_home);
+ }
  }
 
  scratch_end(scratch);