Commit c0e56f23 authored by Tarn Burton's avatar Tarn Burton
Browse files

Add ed hooks

parent e5d83363
......@@ -1233,6 +1233,7 @@ cl_symbols[] = {
{SYS_ "RMDIR" ECL_FUN("si_rmdir", si_rmdir, 1) ECL_VAR(SI_ORDINARY, OBJNULL)},
{EXT_ "MAKE-PIPE" ECL_FUN("si_make_pipe", si_make_pipe, 0) ECL_VAR(EXT_ORDINARY, OBJNULL)},
/* package extensions */
{EXT_ "PACKAGE-LOCK" ECL_FUN("si_package_lock", si_package_lock, 2) ECL_VAR(EXT_ORDINARY, OBJNULL)},
{EXT_ "PACKAGE-LOCKED-P" ECL_FUN("si_package_locked_p", si_package_locked_p, 1) ECL_VAR(EXT_ORDINARY, OBJNULL)},
......@@ -1363,8 +1363,7 @@
(proclamation get-internal-run-time () unsigned-byte :no-side-effects)
(proclamation disassemble ((or function-designator list)) null)
(proclamation room (&optional (member t nil :default)) (values &rest t))
(proclamation ed (&optional (or null pathname string function-name))
(values &rest t))
(proclamation ed (&optional t) (values &rest t))
(proclamation inspect (t) (values &rest t))
(proclamation dribble (&optional pathname-designator) (values &rest t))
(proclamation lisp-implementation-type () (or string null) :pure)
......@@ -46,12 +46,44 @@ Gives a global declaration. See DECLARE for possible DECL-SPECs."
;;; Editor.
(defun ed (&optional filename)
"Args: (&optional filename)
Invokes the editor. The action depends on the version of ECL. See the ECL
Report for details."
(ext:system (format nil "~S ~A" (or (si::getenv "EDITOR") "vi") filename)))
;;; Default editor hook which calls external program defined by the EDITOR
;;; environment variable or vi if that is not defined.
(declaim (ftype (function (t) boolean) ed-external))
(defun ed-external (x)
(when (typep x '(or null pathname string))
(run-program (or (getenv "EDITOR") "vi") (and x (list x)))
;;; Copied mostly from SBCL
(declaim (type list *ed-functions*))
(defvar *ed-functions* (list #'ed-external)
"See function documentation for ED.")
(defun ed (&optional x)
"Starts the editor (on a file or an object if named). Functions from the
list EXT:*ED-FUNCTIONS* are called in order with X as an argument until one
of them returns non-NIL; these functions are responsible for signalling a
FILE-ERROR to indicate failure to perform an operation on the file system.
If no function returns a non-NIL value or EXT:*ED-FUNCTIONS* is NIL then a
SIMPLE-ERROR will be signalled.
The Common Lisp specification states that the X argument is either NIL, a
function name, or an instance of STRING or PATHNAME and that a TYPE-ERROR
may be signalled if is not one of these types. ECL does not check the type
of X and thus permits any object to be passed to the hook functions. This
allows for the possibility of editing other objects that have a
representation in source code such as class definitions. Therefore, the
hook functions should not make any assumptions about the type of X and
should instead return NIL if there is not an approriate edit method for a
specific value of X.
By default EXT:*ED-FUNCTIONS* contains a single function that attempts to
run the program named in the environment variable EDITOR. If this
environment variable is not set then the fallback program is vi."
(dolist (fun *ed-functions*
(error "Do not know how to ED ~a." x))
(when (funcall fun x)
(return t))))
;;; Allocator.
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