Source file `xdg.ml`

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(* From dune API. TODO: use the API directly once it's public. *)

let home =
  try Sys.getenv "HOME"
  with Not_found -> (
    try (Unix.getpwuid (Unix.getuid ())).Unix.pw_dir
    with Unix.Unix_error _ | Not_found ->
      if Sys.win32 then try Sys.getenv "AppData" with Not_found -> "" else "")

let ( / ) = Filename.concat

let get env_var unix_default win32_default =
  try Sys.getenv env_var
  with Not_found -> if Sys.win32 then win32_default else unix_default

let cache_dir =
  get "XDG_CACHE_HOME" (home / ".cache") (home / "Local Settings" / "Cache")

let config_dir =
  get "XDG_CONFIG_HOME" (home / ".config") (home / "Local Settings")

let data_dir =
  get "XDG_DATA_HOME"
    (home / ".local" / "share")
    (try Sys.getenv "AppData" with Not_found -> "")