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swank-start.lisp
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swank-start.lisp
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;;; swank-start.lisp - Start a new swank server with respect to given
;;; SWANK_PORT, SWANK_CODING_SYSTEM and
;;; SWANK_PID_FILE environment variables.
;;; Copyright (c) 2010, Volkan YAZICI <volkan.yazici@gmail.com>
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions are met:
;;;
;;; - Redistributions of source code must retain the above copyright notice,
;;; this list of conditions and the following disclaimer.
;;;
;;; - Redistributions in binary form must reproduce the above copyright notice,
;;; this list of conditions and the following disclaimer in the documentation
;;; and/or other materials provided with the distribution.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
;;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
;;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
;;; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
;;; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
;;; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
;;; POSSIBILITY OF SUCH DAMAGE.
#-ccl
(defun getenv (name &optional default)
#+cmu
(let ((x (assoc name ext:*environment-list* :test #'string=)))
(if x (cdr x) default))
#-cmu
(or
#+allegro (sys:getenv name)
#+clisp (ext:getenv name)
#+ecl (si:getenv name)
#+sbcl (sb-unix::posix-getenv name)
#+lispworks (lispworks:environment-variable name)
default))
;; Validate passed arguments.
(dolist (var '("STY" "SWANK_PID_FILE" "SWANK_PORT" "SWANK_CODING_SYSTEM"))
(unless (getenv var)
(error "Missing environment variable!" var)))
;; Report PID information.
(with-open-file (out (getenv "SWANK_PID_FILE")
:direction :output
:if-exists :supersede)
(write-string (getenv "STY") out))
;; Load ASDF and swank.
(require :asdf)
(asdf:oos 'asdf:load-op :swank)
;; Communication will be established through a single stream.
(setf swank:*use-dedicated-output-stream* nil)
;; Fire up a fresh swank server.
(swank:create-server :port (parse-integer (getenv "SWANK_PORT"))
:coding-system (getenv "SWANK_CODING_SYSTEM")
:dont-close t)