;; FIXME: There are lots of ways for errors to happen around here
;; (e.g. bad command line syntax, or READ-ERROR while trying to
;; READ an --eval string). Make sure that they're handled
- ;; reasonably. Also, perhaps all errors while parsing the command
- ;; line should cause the system to QUIT, instead of trying to go
- ;; into the Lisp debugger, since trying to go into the debugger
- ;; gets into various annoying issues of where we should go after
- ;; the user tries to return from the debugger.
+ ;; reasonably.
- ;; Parse command line options.
- (loop while options do
- (/show0 "at head of LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
- (let ((option (first options)))
- (flet ((pop-option ()
- (if options
- (pop options)
- (error "unexpected end of command line options"))))
- (cond ((string= option "--sysinit")
- (pop-option)
- (if sysinit
- (error "multiple --sysinit options")
- (setf sysinit (pop-option))))
- ((string= option "--userinit")
- (pop-option)
- (if userinit
- (error "multiple --userinit options")
- (setf userinit (pop-option))))
- ((string= option "--eval")
- (pop-option)
- (push (pop-option) reversed-evals))
- ((string= option "--load")
- (pop-option)
- (push
- ;; FIXME: see BUG 296
- (concatenate 'string "(|LOAD| \"" (pop-option) "\")")
- reversed-evals))
- ((string= option "--noprint")
- (pop-option)
- (setf noprint t))
- ;; FIXME: --noprogrammer was deprecated in 0.7.5, and
- ;; in a year or so this backwards compatibility can
- ;; go away.
- ((string= option "--noprogrammer")
- (warn "treating deprecated --noprogrammer as --disable-debugger")
- (pop-option)
- (push "(|DISABLE-DEBUGGER|)" reversed-evals))
- ((string= option "--disable-debugger")
- (pop-option)
- (push "(|DISABLE-DEBUGGER|)" reversed-evals))
- ((string= option "--end-toplevel-options")
- (pop-option)
- (return))
- (t
- ;; Anything we don't recognize as a toplevel
- ;; option must be the start of user-level
- ;; options.. except that if we encounter
- ;; "--end-toplevel-options" after we gave up
- ;; because we didn't recognize an option as a
- ;; toplevel option, then the option we gave up on
- ;; must have been an error. (E.g. in
- ;; "sbcl --eval '(a)' --eval'(b)' --end-toplevel-options"
- ;; this test will let us detect that the string
- ;; "--eval(b)" is an error.)
- (if (find "--end-toplevel-options" options
- :test #'string=)
- (error "bad toplevel option: ~S" (first options))
- (return)))))))
- (/show0 "done with LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
-
- ;; Delete all the options that we processed, so that only
- ;; user-level options are left visible to user code.
- (setf (rest *posix-argv*) options)
-
- ;; Handle initialization files.
- (/show0 "handling initialization files in TOPLEVEL-INIT")
- (flet (;; If any of POSSIBLE-INIT-FILE-NAMES names a real file,
- ;; return its truename.
- (probe-init-files (&rest possible-init-file-names)
- (declare (type list possible-init-file-names))
- (/show0 "entering PROBE-INIT-FILES")
- (prog1
- (find-if (lambda (x)
- (and (stringp x) (probe-file x)))
- possible-init-file-names)
- (/show0 "leaving PROBE-INIT-FILES"))))
- (let* ((sbcl-home (posix-getenv "SBCL_HOME"))
- (sysinit-truename
- (probe-init-files sysinit
- (concatenate 'string sbcl-home "/sbclrc")
- "/etc/sbclrc"))
- (user-home (or (posix-getenv "HOME")
- (error "The HOME environment variable is unbound, ~
- so user init file can't be found.")))
- (userinit-truename (probe-init-files userinit
- (concatenate 'string
- user-home
- "/.sbclrc"))))
-
- ;; We wrap all the pre-REPL user/system customized startup code
- ;; in a restart.
- ;;
- ;; (Why not wrap everything, even the stuff above, in this
- ;; restart? Errors above here are basically command line or
- ;; Unix environment errors, e.g. a missing file or a typo on
- ;; the Unix command line, and you don't need to get into Lisp
- ;; to debug them, you should just start over and do it right
- ;; at the Unix level. Errors below here are generally errors
- ;; in user Lisp code, and it might be helpful to let the user
- ;; reach the REPL in order to help figure out what's going
- ;; on.)
- (restart-case
- (progn
- (flet ((process-init-file (truename)
- (when truename
- (unless (load truename)
- (error "~S was not successfully loaded." truename))
- (flush-standard-output-streams))))
- (process-init-file sysinit-truename)
- (process-init-file userinit-truename))
-
- ;; Process --eval options.
- (/show0 "handling --eval options in TOPLEVEL-INIT")
- (dolist (expr-as-string (reverse reversed-evals))
- (/show0 "handling one --eval option in TOPLEVEL-INIT")
- (let ((expr (with-input-from-string (eval-stream
- expr-as-string)
- (let* ((eof-marker (cons :eof :eof))
- (result (read eval-stream nil eof-marker))
- (eof (read eval-stream nil eof-marker)))
- (cond ((eq result eof-marker)
- (error "unable to parse ~S"
- expr-as-string))
- ((not (eq eof eof-marker))
- (error "more than one expression in ~S"
- expr-as-string))
- (t
- result))))))
- (eval expr)
- (flush-standard-output-streams))))
- (continue ()
- :report
- "Continue anyway (skipping to toplevel read/eval/print loop)."
- (/show0 "CONTINUEing from pre-REPL RESTART-CASE")
- (values)) ; (no-op, just fall through)
- (quit ()
- :report "Quit SBCL (calling #'QUIT, killing the process)."
- (/show0 "falling through to QUIT from pre-REPL RESTART-CASE")
- (quit))))
-
- ;; one more time for good measure, in case we fell out of the
- ;; RESTART-CASE above before one of the flushes in the ordinary
- ;; flow of control had a chance to operate
- (flush-standard-output-streams)
-
- (/show0 "falling into TOPLEVEL-REPL from TOPLEVEL-INIT")
- (toplevel-repl noprint)
- ;; (classic CMU CL error message: "You're certainly a clever child.":-)
- (critically-unreachable "after TOPLEVEL-REPL"))))
+ ;; Process command line options.
+ (flet (;; Errors while processing the command line cause the system
+ ;; to QUIT, instead of trying to go into the Lisp debugger,
+ ;; because trying to go into the Lisp debugger would get
+ ;; into various annoying issues of where we should go after
+ ;; the user tries to return from the debugger.
+ (startup-error (control-string &rest args)
+ (format
+ *error-output*
+ "fatal error before reaching READ-EVAL-PRINT loop: ~% ~?~%"
+ control-string
+ args)
+ (quit :unix-status 1)))
+ (loop while options do
+ (/show0 "at head of LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
+ (let ((option (first options)))
+ (flet ((pop-option ()
+ (if options
+ (pop options)
+ (startup-error
+ "unexpected end of command line options"))))
+ (cond ((string= option "--sysinit")
+ (pop-option)
+ (if sysinit
+ (startup-error "multiple --sysinit options")
+ (setf sysinit (pop-option))))
+ ((string= option "--userinit")
+ (pop-option)
+ (if userinit
+ (startup-error "multiple --userinit options")
+ (setf userinit (pop-option))))
+ ((string= option "--eval")
+ (pop-option)
+ (push (pop-option) reversed-evals))
+ ((string= option "--load")
+ (pop-option)
+ (push
+ ;; FIXME: see BUG 296
+ (concatenate 'string "(|LOAD| \"" (pop-option) "\")")
+ reversed-evals))
+ ((string= option "--noprint")
+ (pop-option)
+ (setf noprint t))
+ ;; FIXME: --noprogrammer was deprecated in 0.7.5, and
+ ;; in a year or so this backwards compatibility can
+ ;; go away.
+ ((string= option "--noprogrammer")
+ (warn "treating deprecated --noprogrammer as --disable-debugger")
+ (pop-option)
+ (push "(|DISABLE-DEBUGGER|)" reversed-evals))
+ ((string= option "--disable-debugger")
+ (pop-option)
+ (push "(|DISABLE-DEBUGGER|)" reversed-evals))
+ ((string= option "--end-toplevel-options")
+ (pop-option)
+ (return))
+ (t
+ ;; Anything we don't recognize as a toplevel
+ ;; option must be the start of user-level
+ ;; options.. except that if we encounter
+ ;; "--end-toplevel-options" after we gave up
+ ;; because we didn't recognize an option as a
+ ;; toplevel option, then the option we gave up on
+ ;; must have been an error. (E.g. in
+ ;; "sbcl --eval '(a)' --eval'(b)' --end-toplevel-options"
+ ;; this test will let us detect that the string
+ ;; "--eval(b)" is an error.)
+ (if (find "--end-toplevel-options" options
+ :test #'string=)
+ (startup-error "bad toplevel option: ~S"
+ (first options))
+ (return)))))))
+ (/show0 "done with LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
+
+ ;; Delete all the options that we processed, so that only
+ ;; user-level options are left visible to user code.
+ (setf (rest *posix-argv*) options)
+
+ ;; Handle initialization files.
+ (/show0 "handling initialization files in TOPLEVEL-INIT")
+ (flet (;; shared idiom for searching for SYSINITish and
+ ;; USERINITish files
+ (probe-init-files (explicitly-specified-init-file-name
+ &rest default-init-file-names)
+ (declare (type list possible-init-file-names))
+ (if explicitly-specified-init-file-name
+ (or (probe-file explicitly-specified-init-file-name)
+ (startup-error "The file ~S was not found."
+ explicitly-specified-init-file-name))
+ (find-if (lambda (x)
+ (and (stringp x) (probe-file x)))
+ default-init-file-names)))
+ ;; shared idiom for creating default names for
+ ;; SYSINITish and USERINITish files
+ (init-file-name (maybe-dir-name basename)
+ (and maybe-dir-name
+ (concatenate 'string maybe-dir-name "/" basename))))
+ (let ((sysinit-truename
+ (probe-init-files sysinit
+ (init-file-name (posix-getenv "SBCL_HOME")
+ "sbclrc")
+ "/etc/sbclrc"))
+ (userinit-truename
+ (probe-init-files userinit
+ (init-file-name (posix-getenv "HOME")
+ ".sbclrc"))))
+
+ ;; We wrap all the pre-REPL user/system customized startup code
+ ;; in a restart.
+ ;;
+ ;; (Why not wrap everything, even the stuff above, in this
+ ;; restart? Errors above here are basically command line or
+ ;; Unix environment errors, e.g. a missing file or a typo on
+ ;; the Unix command line, and you don't need to get into Lisp
+ ;; to debug them, you should just start over and do it right
+ ;; at the Unix level. Errors below here are generally errors
+ ;; in user Lisp code, and it might be helpful to let the user
+ ;; reach the REPL in order to help figure out what's going
+ ;; on.)
+ (restart-case
+ (progn
+ (flet ((process-init-file (truename)
+ (when truename
+ (unless (load truename)
+ (error "~S was not successfully loaded."
+ truename))
+ (flush-standard-output-streams))))
+ (process-init-file sysinit-truename)
+ (process-init-file userinit-truename))
+
+ ;; Process --eval options.
+ (/show0 "handling --eval options in TOPLEVEL-INIT")
+ (dolist (expr-as-string (reverse reversed-evals))
+ (/show0 "handling one --eval option in TOPLEVEL-INIT")
+ (let ((expr (with-input-from-string (eval-stream
+ expr-as-string)
+ (let* ((eof-marker (cons :eof :eof))
+ (result (read eval-stream
+ nil
+ eof-marker))
+ (eof (read eval-stream nil eof-marker)))
+ (cond ((eq result eof-marker)
+ (error "unable to parse ~S"
+ expr-as-string))
+ ((not (eq eof eof-marker))
+ (error
+ "more than one expression in ~S"
+ expr-as-string))
+ (t
+ result))))))
+ (eval expr)
+ (flush-standard-output-streams))))
+ (continue ()
+ :report
+ "Continue anyway (skipping to toplevel read/eval/print loop)."
+ (/show0 "CONTINUEing from pre-REPL RESTART-CASE")
+ (values)) ; (no-op, just fall through)
+ (quit ()
+ :report "Quit SBCL (calling #'QUIT, killing the process)."
+ (/show0 "falling through to QUIT from pre-REPL RESTART-CASE")
+ (quit))))
+
+ ;; one more time for good measure, in case we fell out of the
+ ;; RESTART-CASE above before one of the flushes in the ordinary
+ ;; flow of control had a chance to operate
+ (flush-standard-output-streams)
+
+ (/show0 "falling into TOPLEVEL-REPL from TOPLEVEL-INIT")
+ (toplevel-repl noprint)
+ ;; (classic CMU CL error message: "You're certainly a clever child.":-)
+ (critically-unreachable "after TOPLEVEL-REPL")))))
;;; hooks to support customized toplevels like ACL-style toplevel from
;;; KMR on sbcl-devel 2002-12-21. Altered by CSR 2003-11-16 for
projects / sbcl.git / commitdiff