The following functions are responsible for installing the user’s
customization settings for variables and faces, respectively. When
the user invokes ‘Save for future sessions’ in the Customize
interface, that takes effect by writing a
custom-set-faces form into the custom file, to be
evaluated the next time Emacs starts.
This function installs the variable customizations specified by args. Each argument in args should have the form
(var expression [now [request [comment]]])
var is a variable name (a symbol), and expression is an expression which evaluates to the desired customized value.
defcustom form for var has been evaluated prior to
custom-set-variables call, expression is immediately
evaluated, and the variable’s value is set to the result. Otherwise,
expression is stored into the variable’s
property, to be evaluated when the relevant
defcustom is called
(usually when the library defining that variable is loaded into
The now, request, and comment entries are for
internal use only, and may be omitted. now, if non-
means to set the variable’s value now, even if the variable’s
defcustom form has not been evaluated. request is a list
of features to be loaded immediately (see Features).
comment is a string describing the customization.
This function installs the face customizations specified by args. Each argument in args should have the form
(face spec [now [comment]])
face is a face name (a symbol), and spec is the customized face specification for that face (see Defining Faces).
The now and comment entries are for internal use only, and
may be omitted. now, if non-
nil, means to install the
face specification now, even if the
defface form has not been
evaluated. comment is a string describing the customization.