OpamClientConfigval default : tval set : t -> t options_funval setk : (t -> 'a) -> t -> 'a options_funval update : ?noop:_ -> unit options_funval init : ?noop:_ -> unit options_funSets the options, reading the environment to get default values when unspecified
OPAMNOSELFUPGRADE is set to this value when the current opam process has been called by an older opam process using the self-upgrade mechanism