[4898ef]: contrib / sb-aclrepl / repl.lisp Maximize Restore History

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;;;; Replicate much of the ACL toplevel functionality in SBCL. Mostly
;;;; this is portable code, but fundamentally it all hangs from a few
;;;; SBCL-specific hooks like SB-INT:*REPL-READ-FUN* and
;;;; SB-INT:*REPL-PROMPT-FUN*.
;;;;
;;;; The documentation, which may or may not apply in its entirety at
;;;; any given time, for this functionality is on the ACL website:
;;;; <http://www.franz.com/support/documentation/6.2/doc/top-level.htm>.
(cl:in-package :sb-aclrepl)
(defstruct user-cmd
(input nil) ; input, maybe a string or form
(func nil) ; cmd func entered, overloaded
; (:eof :null-cmd :cmd-error :history-error)
(args nil) ; args for cmd func
(hnum nil)) ; history number
;;; cmd table entry
(defstruct cmd-table-entry
(name nil) ; name of command
(func nil) ; function handler
(desc nil) ; short description
(parsing nil) ; (:string :case-sensitive nil)
(group nil) ; command group (:cmd or :alias)
(abbr-len 0)) ; abbreviation length
(eval-when (:compile-toplevel :load-toplevel :execute)
(defparameter *default-prompt*
"~:[~3*~;[~:*~D~:[~;~:*:~D~]~:[~;i~]~:[~;c~]] ~]~A(~D): "
"The default prompt."))
(defparameter *prompt* #.*default-prompt*
"The current prompt string or formatter function.")
(defparameter *use-short-package-name* t
"when T, use the shortnest package nickname in a prompt")
(defparameter *dir-stack* nil
"The top-level directory stack")
(defparameter *command-char* #\:
"Prefix character for a top-level command")
(defvar *max-history* 100
"Maximum number of history commands to remember")
(defvar *exit-on-eof* t
"If T, then exit when the EOF character is entered.")
(defparameter *history* nil
"History list")
(defparameter *cmd-number* 1
"Number of the next command")
(defvar *input*)
(defvar *output*)
(declaim (type list *history*))
(defvar *eof-marker* :eof)
(defvar *eof-cmd* (make-user-cmd :func :eof))
(defvar *null-cmd* (make-user-cmd :func :null-cmd))
(defparameter *cmd-table-hash*
(make-hash-table :size 30 :test #'equal))
(defun prompt-package-name ()
(if *use-short-package-name*
(car (sort (append
(package-nicknames cl:*package*)
(list (package-name cl:*package*)))
(lambda (a b) (< (length a) (length b)))))
(package-name cl:*package*)))
(defun read-cmd (input-stream)
;; Reads a command from the user and returns a user-cmd object
(let* ((next-char (peek-char-non-whitespace input-stream))
(cmd (cond
((eql *command-char* next-char)
(dispatch-command-line input-stream))
((eql #\newline next-char)
(read-char input-stream)
*null-cmd*)
((eql :eof next-char)
*eof-cmd*)
(t
(let* ((eof (cons nil *eof-marker*))
(form (read input-stream nil eof)))
(if (eq form eof)
*eof-cmd*
(make-user-cmd :input form :func nil :hnum *cmd-number*)))))))
(if (and (eq cmd *eof-cmd*) (typep input-stream 'string-stream))
(throw 'repl-catcher cmd)
cmd)))
(defun dispatch-command-line (input-stream)
"Processes an input line that starts with *command-char*"
(let* ((line (string-trim-whitespace (read-line input-stream)))
(first-space-pos (position #\space line))
(cmd-string (subseq line 1 first-space-pos))
(cmd-args-string
(if first-space-pos
(string-trim-whitespace (subseq line first-space-pos))
"")))
(declare (simple-string line))
(cond
((or (zerop (length cmd-string))
(whitespace-char-p (char cmd-string 0)))
*null-cmd*)
((or (numberp (read-from-string cmd-string))
(char= (char cmd-string 0) #\+)
(char= (char cmd-string 0) #\-))
(process-cmd-numeric cmd-string cmd-args-string))
((char= (char cmd-string 0) *command-char*)
(process-history-search (subseq cmd-string 1) cmd-args-string))
(t
(process-cmd-text cmd-string line cmd-args-string)))))
(defun process-cmd-numeric (cmd-string cmd-args-string)
"Process a numeric cmd, such as ':123'"
(let* ((first-char (char cmd-string 0))
(number-string (if (digit-char-p first-char)
cmd-string
(subseq cmd-string 1)))
(is-minus (char= first-char #\-))
(raw-number (read-from-string number-string))
(number (if is-minus
(- *cmd-number* raw-number)
raw-number))
(cmd (get-history number)))
(when (eq cmd *null-cmd*)
(return-from process-cmd-numeric
(make-user-cmd :func :history-error :input (read-from-string
cmd-string))))
(maybe-return-history-cmd cmd cmd-args-string)))
(defun maybe-return-history-cmd (cmd cmd-args-string)
(format *output* "~A~%" (user-cmd-input cmd))
(let ((dont-redo
(when (and (stringp cmd-args-string)
(plusp (length cmd-args-string))
(char= #\? (char cmd-args-string 0)))
(do ((line nil (read-line *input*)))
((and line (or (zerop (length line))
(string-equal line "Y")
(string-equal line "N")))
(when (string-equal line "N")
t))
(when line
(format *output* "Type \"y\" for yes or \"n\" for no.~%"))
(format *output* "redo? [y] ")
(force-output *output*)))))
(if dont-redo
*null-cmd*
(make-user-cmd :func (user-cmd-func cmd)
:input (user-cmd-input cmd)
:args (user-cmd-args cmd)
:hnum *cmd-number*))))
(defun find-history-matching-pattern (cmd-string)
"Return history item matching cmd-string or NIL if not found"
(dolist (his *history* nil)
(let* ((input (user-cmd-input his))
(string-input (if (stringp input)
input
(write-to-string input))))
(when (search cmd-string string-input :test #'string-equal)
(return-from find-history-matching-pattern his)))))
(defun process-history-search (pattern cmd-args-string)
(let ((cmd (find-history-matching-pattern pattern)))
(unless cmd
(format *output* "No match on history list with pattern ~S~%" pattern)
(return-from process-history-search *null-cmd*))
(maybe-return-history-cmd cmd cmd-args-string)))
(defun process-cmd-text (cmd-string line cmd-args-string)
"Process a text cmd, such as ':ld a b c'"
(flet ((parse-args (parsing args-string)
(case parsing
(:string
(if (zerop (length args-string))
nil
(list args-string)))
(t
(let ((string-stream (make-string-input-stream args-string))
(eof (cons nil *eof-marker*))) ;new cons for eq uniqueness
(loop as arg = (read string-stream nil eof)
until (eq arg eof)
collect arg))))))
(let ((cmd-entry (find-cmd cmd-string)))
(unless cmd-entry
(return-from process-cmd-text
(make-user-cmd :func :cmd-error :input cmd-string)))
(make-user-cmd :func (cmd-table-entry-func cmd-entry)
:input line
:args (parse-args (cmd-table-entry-parsing cmd-entry)
cmd-args-string)
:hnum *cmd-number*))))
(defun make-cte (name-param func desc parsing group abbr-len)
(let ((name (etypecase name-param
(string
name-param)
(symbol
(string-downcase (write-to-string name-param))))))
(make-cmd-table-entry :name name :func func :desc desc
:parsing parsing :group group
:abbr-len (if abbr-len
abbr-len
(length name)))))
(defun %add-entry (cmd &optional abbr-len)
(let* ((name (cmd-table-entry-name cmd))
(alen (if abbr-len
abbr-len
(length name))))
(dotimes (i (length name))
(when (>= i (1- alen))
(setf (gethash (subseq name 0 (1+ i)) *cmd-table-hash*)
cmd)))))
(defun add-cmd-table-entry (cmd-string abbr-len func-name desc parsing)
(%add-entry
(make-cte cmd-string (symbol-function func-name) desc parsing :cmd abbr-len)
abbr-len))
(defun find-cmd (cmdstr)
(gethash (string-downcase cmdstr) *cmd-table-hash*))
(defun user-cmd= (c1 c2)
"Returns T if two user commands are equal"
(and (eq (user-cmd-func c1) (user-cmd-func c2))
(equal (user-cmd-args c1) (user-cmd-args c2))
(equal (user-cmd-input c1) (user-cmd-input c2))))
(defun add-to-history (cmd)
(unless (and *history* (user-cmd= cmd (car *history*)))
(when (>= (length *history*) *max-history*)
(setq *history* (nbutlast *history*
(1+ (- (length *history*) *max-history*)))))
(push cmd *history*)
(incf *cmd-number*)))
(defun get-history (n)
(let ((cmd (find n *history* :key #'user-cmd-hnum :test #'eql)))
(if cmd
cmd
*null-cmd*)))
(defun get-cmd-doc-list (&optional (group :cmd))
"Return list of all commands"
(let ((cmds '()))
(maphash (lambda (k v)
(when (and
(= (length k) (length (cmd-table-entry-name v)))
(eq (cmd-table-entry-group v) group))
(push (list k
(if (= (cmd-table-entry-abbr-len v)
(length k))
""
(subseq k 0 (cmd-table-entry-abbr-len v)))
(cmd-table-entry-desc v)) cmds)))
*cmd-table-hash*)
(sort cmds #'string-lessp :key #'car)))
(defun cd-cmd (&optional string-dir)
(cond
((or (zerop (length string-dir))
(string= string-dir "~"))
(setf cl:*default-pathname-defaults* (user-homedir-pathname)))
(t
(let ((new (truename string-dir)))
(when (pathnamep new)
(setf cl:*default-pathname-defaults* new)))))
(format *output* "~A~%" (namestring cl:*default-pathname-defaults*))
(values))
(defun pwd-cmd ()
(format *output* "Lisp's current working directory is ~s.~%"
(namestring cl:*default-pathname-defaults*))
(values))
(defun trace-cmd (&rest args)
(if args
(format *output* "~A~%" (eval (sb-debug::expand-trace args)))
(format *output* "~A~%" (sb-debug::%list-traced-funs)))
(values))
(defun untrace-cmd (&rest args)
(if args
(format *output* "~A~%"
(eval
(sb-int:collect ((res))
(let ((current args))
(loop
(unless current (return))
(let ((name (pop current)))
(res (if (eq name :function)
`(sb-debug::untrace-1 ,(pop current))
`(sb-debug::untrace-1 ',name))))))
`(progn ,@(res) t))))
(format *output* "~A~%" (eval (sb-debug::untrace-all))))
(values))
#+sb-thread
(defun all-threads ()
"Return a list of all threads"
(sb-thread:list-all-threads))
#+sb-thread
(defun other-threads ()
"Returns a list of all threads except the current one"
(delete sb-thread:*current-thread* (all-threads)))
(defun exit-cmd (&optional (status 0))
#+sb-thread
(let ((other-threads (other-threads)))
(when other-threads
(format *output* "There exists the following processes~%")
(format *output* "~{~A~%~}" other-threads)
(format *output* "Do you want to exit lisp anyway [n]? ")
(force-output *output*)
(let ((input (string-trim-whitespace (read-line *input*))))
(if (and (plusp (length input))
(or (char= #\y (char input 0))
(char= #\Y (char input 0))))
;; loop in case more threads get created while trying to exit
(do ((threads other-threads (other-threads)))
((eq nil threads))
(map nil #'sb-thread:destroy-thread threads)
(sleep 0.2))
(return-from exit-cmd)))))
(sb-ext:quit :unix-status status)
(values))
(defun package-cmd (&optional pkg)
(cond
((null pkg)
(format *output* "The ~A package is current.~%"
(package-name cl:*package*)))
((null (find-package (write-to-string pkg)))
(format *output* "Unknown package: ~A.~%" pkg))
(t
(setf cl:*package* (find-package (write-to-string pkg)))))
(values))
(defun string-to-list-skip-spaces (str)
"Return a list of strings, delimited by spaces, skipping spaces."
(declare (type (or null string) str))
(when str
(loop for i = 0 then (1+ j)
as j = (position #\space str :start i)
when (not (char= (char str i) #\space))
collect (subseq str i j) while j)))
(let ((last-files-loaded nil))
(defun ld-cmd (&optional string-files)
(if string-files
(setq last-files-loaded string-files)
(setq string-files last-files-loaded))
(dolist (arg (string-to-list-skip-spaces string-files))
(let ((file
(if (string= arg "~/" :end1 1 :end2 1)
(merge-pathnames (parse-namestring
(string-left-trim "~/" arg))
(user-homedir-pathname))
arg)))
(format *output* "loading ~S~%" file)
(load file))))
(values))
(defun cf-cmd (string-files)
(when string-files
(dolist (arg (string-to-list-skip-spaces string-files))
(compile-file arg)))
(values))
(defun >-num (x y)
"Return if x and y are numbers, and x > y"
(and (numberp x) (numberp y) (> x y)))
(defun newer-file-p (file1 file2)
"Is file1 newer (written later than) file2?"
(>-num (if (probe-file file1) (file-write-date file1))
(if (probe-file file2) (file-write-date file2))))
(defun compile-file-as-needed (src-path)
"Compiles a file if needed, returns path."
(let ((dest-path (compile-file-pathname src-path)))
(when (or (not (probe-file dest-path))
(newer-file-p src-path dest-path))
(ensure-directories-exist dest-path)
(compile-file src-path :output-file dest-path))
dest-path))
;;;; implementation of commands
(defun apropos-cmd (string)
(apropos (string-upcase string))
(fresh-line *output*)
(values))
(let ((last-files-loaded nil))
(defun cload-cmd (&optional string-files)
(if string-files
(setq last-files-loaded string-files)
(setq string-files last-files-loaded))
(dolist (arg (string-to-list-skip-spaces string-files))
(format *output* "loading ~a~%" arg)
(load (compile-file-as-needed arg)))
(values)))
(defun inspect-cmd (arg)
(inspector-fun (eval arg) nil *output*)
(values))
(defun istep-cmd (&optional arg-string)
(istep (string-to-list-skip-spaces arg-string) *output*)
(values))
(defun describe-cmd (&rest args)
(dolist (arg args)
(eval `(describe ,arg)))
(values))
(defun macroexpand-cmd (arg)
(pprint (macroexpand arg) *output*)
(values))
(defun history-cmd ()
(let ((n (length *history*)))
(declare (fixnum n))
(dotimes (i n)
(declare (fixnum i))
(let ((hist (nth (- n i 1) *history*)))
(format *output* "~3A " (user-cmd-hnum hist))
(if (stringp (user-cmd-input hist))
(format *output* "~A~%" (user-cmd-input hist))
(format *output* "~W~%" (user-cmd-input hist))))))
(values))
(defun help-cmd (&optional cmd)
(cond
(cmd
(let ((cmd-entry (find-cmd cmd)))
(if cmd-entry
(format *output* "Documentation for ~A: ~A~%"
(cmd-table-entry-name cmd-entry)
(cmd-table-entry-desc cmd-entry)))))
(t
(format *output* "~11A ~4A ~A~%" "COMMAND" "ABBR" "DESCRIPTION")
(format *output* "~11A ~4A ~A~%" "<n>" ""
"re-execute <n>th history command")
(dolist (doc-entry (get-cmd-doc-list :cmd))
(format *output* "~11A ~4A ~A~%" (first doc-entry)
(second doc-entry) (third doc-entry)))))
(values))
(defun alias-cmd ()
(let ((doc-entries (get-cmd-doc-list :alias)))
(typecase doc-entries
(cons
(format *output* "~11A ~A ~4A~%" "ALIAS" "ABBR" "DESCRIPTION")
(dolist (doc-entry doc-entries)
(format *output* "~11A ~4A ~A~%" (first doc-entry) (second doc-entry) (third doc-entry))))
(t
(format *output* "No aliases are defined~%"))))
(values))
(defun shell-cmd (string-arg)
(sb-ext:run-program "/bin/sh" (list "-c" string-arg)
:input nil :output *output*)
(values))
(defun pushd-cmd (string-arg)
(push string-arg *dir-stack*)
(cd-cmd string-arg)
(values))
(defun popd-cmd ()
(if *dir-stack*
(let ((dir (pop *dir-stack*)))
(cd-cmd dir))
(format *output* "No directory on stack to pop.~%"))
(values))
(defun pop-cmd (&optional (n 1))
(cond
(*inspect-break*
(throw 'repl-catcher (values :inspect n)))
((plusp *break-level*)
(throw 'repl-catcher (values :pop n))))
(values))
(defun bt-cmd (&optional (n most-positive-fixnum))
(sb-debug::backtrace n))
(defun current-cmd ()
(sb-debug::describe-debug-command))
(defun top-cmd ()
(sb-debug::frame-debug-command 0))
(defun bottom-cmd ()
(sb-debug::bottom-debug-command))
(defun up-cmd (&optional (n 1))
(dotimes (i n)
(if (and sb-debug::*current-frame*
(sb-di:frame-up sb-debug::*current-frame*))
(sb-debug::up-debug-command)
(progn
(format *output* "Top of the stack")
(return-from up-cmd)))))
(defun dn-cmd (&optional (n 1))
(dotimes (i n)
(if (and sb-debug::*current-frame*
(sb-di:frame-down sb-debug::*current-frame*))
(sb-debug::down-debug-command)
(progn
(format *output* "Bottom of the stack")
(return-from dn-cmd)))))
(defun continue-cmd (&optional (num 0))
;; don't look at first restart
(let ((restarts (compute-restarts)))
(if restarts
(let ((restart
(typecase num
(unsigned-byte
(if (< -1 num (length restarts))
(nth num restarts)
(progn
(format *output* "There is no such restart")
(return-from continue-cmd))))
(symbol
(find num (the list restarts)
:key #'restart-name
:test (lambda (sym1 sym2)
(string= (symbol-name sym1)
(symbol-name sym2)))))
(t
(format *output* "~S is invalid as a restart name" num)
(return-from continue-cmd nil)))))
(when restart
(invoke-restart-interactively restart)))
(format *output* "~&There are no restarts"))))
(defun error-cmd ()
(when (plusp *break-level*)
(if *inspect-break*
(sb-debug::show-restarts (compute-restarts) *output*)
(let ((sb-debug::*debug-restarts* (compute-restarts)))
(sb-debug::error-debug-command)))))
(defun frame-cmd ()
(sb-debug::print-frame-call sb-debug::*current-frame*))
(defun zoom-cmd ()
)
(defun local-cmd (&optional var)
(declare (ignore var))
(sb-debug::list-locals-debug-command))
(defun processes-cmd ()
#+sb-thread
(dolist (thread (all-threads))
(format *output* "~&~A" thread)
(when (eq thread sb-thread:*current-thread*)
(format *output* " [current listener]")))
#-sb-thread
(format *output* "~&Threads are not supported in this version of sbcl")
(values))
(defun sb-aclrepl::kill-cmd (&rest selected-threads)
#+sb-thread
(dolist (thread selected-threads)
(let ((found (find thread (all-threads) :key 'sb-thread:thread-name
:test 'equal)))
(if found
(progn
(format *output* "~&Destroying thread ~A" thread)
(sb-thread:destroy-thread found))
(format *output* "~&Thread ~A not found" thread))))
#-sb-thread
(declare (ignore selected-threads))
#-sb-thread
(format *output* "~&Threads are not supported in this version of sbcl")
(values))
(defun focus-cmd (&optional process)
#-sb-thread
(declare (ignore process))
#+sb-thread
(when process
(format *output* "~&Focusing on next thread waiting waiting for the debugger~%"))
#+sb-thread
(progn
(sb-thread:release-foreground)
(sleep 1))
#-sb-thread
(format *output* "~&Threads are not supported in this version of sbcl")
(values))
(defun reset-cmd ()
(throw 'sb-impl::toplevel-catcher nil))
(defun dirs-cmd ()
(dolist (dir *dir-stack*)
(format *output* "~a~%" dir))
(values))
;;;; dispatch table for commands
(let ((cmd-table
'(("aliases" 3 alias-cmd "show aliases")
("apropos" 2 apropos-cmd "show apropos" :parsing :string)
("bottom" 3 bottom-cmd "move to bottom stack frame")
("top" 3 top-cmd "move to top stack frame")
("bt" 2 bt-cmd "backtrace `n' stack frames, default all")
("up" 2 up-cmd "move up `n' stack frames, default 1")
("dn" 2 dn-cmd "move down `n' stack frames, default 1")
("cd" 2 cd-cmd "change default diretory" :parsing :string)
("ld" 2 ld-cmd "load a file" :parsing :string)
("cf" 2 cf-cmd "compile file" :parsing :string)
("cload" 2 cload-cmd "compile if needed and load file"
:parsing :string)
("current" 3 current-cmd "print the expression for the current stack frame")
("continue" 4 continue-cmd "continue from a continuable error")
("describe" 2 describe-cmd "describe an object")
("macroexpand" 2 macroexpand-cmd "macroexpand an expression")
("package" 2 package-cmd "change current package")
("error" 3 error-cmd "print the last error message")
("exit" 2 exit-cmd "exit sbcl")
("frame" 2 frame-cmd "print info about the current frame")
("help" 2 help-cmd "print this help")
("history" 3 history-cmd "print the recent history")
("inspect" 2 inspect-cmd "inspect an object")
("istep" 1 istep-cmd "navigate within inspection of a lisp object" :parsing :string)
#+sb-thread ("kill" 2 kill-cmd "kill (destroy) processes")
#+sb-thread ("focus" 2 focus-cmd "focus the top level on a process")
("local" 3 local-cmd "print the value of a local variable")
("pwd" 3 pwd-cmd "print current directory")
("pushd" 2 pushd-cmd "push directory on stack" :parsing :string)
("pop" 3 pop-cmd "pop up `n' (default 1) break levels")
("popd" 4 popd-cmd "pop directory from stack")
#+sb-thread ("processes" 3 processes-cmd "list all processes")
("reset" 3 reset-cmd "reset to top break level")
("trace" 2 trace-cmd "trace a function")
("untrace" 4 untrace-cmd "untrace a function")
("dirs" 2 dirs-cmd "show directory stack")
("shell" 2 shell-cmd "execute a shell cmd" :parsing :string)
("zoom" 2 zoom-cmd "print the runtime stack")
)))
(dolist (cmd cmd-table)
(destructuring-bind (cmd-string abbr-len func-name desc &key parsing) cmd
(add-cmd-table-entry cmd-string abbr-len func-name desc parsing))))
;;;; machinery for aliases
(defsetf alias (name &key abbr-len description) (user-func)
`(progn
(%add-entry
(make-cte (quote ,name) ,user-func ,description nil :alias ,abbr-len))
(quote ,name)))
(defmacro alias (name-param args &rest body)
(let ((parsing nil)
(desc "")
(abbr-index nil)
(name (if (atom name-param)
name-param
(car name-param))))
(when (consp name-param)
(dolist (param (cdr name-param))
(cond
((or
(eq param :case-sensitive)
(eq param :string))
(setq parsing param))
((stringp param)
(setq desc param))
((numberp param)
(setq abbr-index param)))))
`(progn
(%add-entry
(make-cte (quote ,name) (lambda ,args ,@body) ,desc ,parsing :alias (when ,abbr-index
(1+ ,abbr-index)))
,abbr-index)
,name)))
(defun remove-alias (&rest aliases)
(declare (list aliases))
(let ((keys '())
(remove-all (not (null (find :all aliases)))))
(unless remove-all ;; ensure all alias are strings
(setq aliases
(loop for alias in aliases
collect
(etypecase alias
(string
alias)
(symbol
(symbol-name alias))))))
(maphash
(lambda (key cmd)
(when (eq (cmd-table-entry-group cmd) :alias)
(if remove-all
(push key keys)
(when (some
(lambda (alias)
(let ((klen (length key)))
(and (>= (length alias) klen)
(string-equal (subseq alias 0 klen)
(subseq key 0 klen)))))
aliases)
(push key keys)))))
*cmd-table-hash*)
(dolist (key keys)
(remhash key *cmd-table-hash*))
keys))
;;;; low-level reading/parsing functions
;;; Skip white space (but not #\NEWLINE), and peek at the next
;;; character.
(defun peek-char-non-whitespace (&optional stream)
(do ((char (peek-char nil stream nil *eof-marker*)
(peek-char nil stream nil *eof-marker*)))
((not (whitespace-char-not-newline-p char)) char)
(read-char stream)))
(defun string-trim-whitespace (str)
(string-trim '(#\space #\tab #\return)
str))
(defun whitespace-char-p (x)
(and (characterp x)
(or (char= x #\space)
(char= x #\tab)
(char= x #\page)
(char= x #\newline)
(char= x #\return))))
(defun whitespace-char-not-newline-p (x)
(and (whitespace-char-p x)
(not (char= x #\newline))))
;;;; linking into SBCL hooks
(defun repl-prompt-fun (stream)
(let ((break-level (when (plusp *break-level*)
*break-level*))
(frame-number (when (and (plusp *break-level*)
sb-debug::*current-frame*)
(sb-di::frame-number sb-debug::*current-frame*))))
(sb-thread::get-foreground)
(fresh-line stream)
(if (functionp *prompt*)
(write-string (funcall *prompt*
break-level
frame-number
*inspect-break*
*continuable-break*
(prompt-package-name) *cmd-number*)
stream)
(handler-case
(format nil *prompt*
break-level
frame-number
*inspect-break*
*continuable-break*
(prompt-package-name) *cmd-number*)
(error ()
(format stream "~&Prompt error> "))
(:no-error (prompt)
(format stream "~A" prompt))))))
(defun process-cmd (user-cmd)
;; Processes a user command. Returns t if the user-cmd was a top-level
;; command
(cond ((eq user-cmd *eof-cmd*)
(when *exit-on-eof*
(sb-ext:quit))
(format *output* "EOF~%")
t)
((eq user-cmd *null-cmd*)
t)
((eq (user-cmd-func user-cmd) :cmd-error)
(format *output* "Unknown top-level command: ~s.~%"
(user-cmd-input user-cmd))
(format *output* "Type `~Ahelp' for the list of commands.~%" *command-char*)
t)
((eq (user-cmd-func user-cmd) :history-error)
(format *output* "Input numbered ~d is not on the history list~%"
(user-cmd-input user-cmd))
t)
((functionp (user-cmd-func user-cmd))
(add-to-history user-cmd)
(apply (user-cmd-func user-cmd) (user-cmd-args user-cmd))
;;(fresh-line)
t)
(t
(add-to-history user-cmd)
nil))) ; nope, not in my job description
(defun repl-read-form-fun (input output)
;; Pick off all the leading ACL magic commands, then return a normal
;; Lisp form.
(let ((*input* input)
(*output* output))
(loop for user-cmd = (read-cmd *input*) do
(if (process-cmd user-cmd)
(progn
(funcall sb-int:*repl-prompt-fun* *output*)
(force-output *output*))
(return (user-cmd-input user-cmd))))))
(setf sb-int:*repl-prompt-fun* #'repl-prompt-fun
sb-int:*repl-read-form-fun* #'repl-read-form-fun)
(defmacro with-new-repl-state ((&rest vars) &body forms)
(let ((gvars (mapcar (lambda (var) (gensym (symbol-name var))) vars)))
`(let (,@(mapcar (lambda (var gvar) `(,gvar ,var)) vars gvars))
(lambda (noprint)
(let ((*noprint* noprint))
(let (,@(mapcar (lambda (var gvar) `(,var ,gvar)) vars gvars))
(unwind-protect
(progn ,@forms)
,@(mapcar (lambda (var gvar) `(setf ,gvar ,var))
vars gvars))))))))
(defun make-repl-fun ()
(with-new-repl-state (*break-level* *inspect-break* *continuable-break*
*dir-stack* *command-char* *prompt*
*use-short-package-name* *max-history* *exit-on-eof*
*history* *cmd-number*)
(repl :noprint noprint :break-level 0)))
(when (boundp 'sb-impl::*repl-fun-generator*)
(setq sb-impl::*repl-fun-generator* #'make-repl-fun))