[Sbcl-help] How to pass arguments to saved SBCL core?

[Duncan B. <dhg...@gm...>]

Hi All,

I'm teaching myself Lisp using SBCL (1.0.40.0.debian).  I have an
application (myfitnessdata), which uses the following code to process
command line arguments:

(:use :common-lisp)
(:export #:main))

(in-package :myfitnessdata)

(require :sb-posix)

;; snip

(defun main ()
  (if (= (length sb-ext:*posix-argv*) 3)
    (let ((username (nth 0 sb-ext:*posix-argv*))
      (password (nth 1 sb-ext:*posix-argv*))
      (path (nth 2 sb-ext:*posix-argv*)))
      (scrape (username password path)))
    (show-usage)))

I am compiling this application using the following Lisp code:

(load "myfitnessdata.lisp")
(save-lisp-and-die "myfitnessdata.bin" :executable t :toplevel
'myfitnessdata:main)

This produces an executable that I can run. However, the
sb-ext:*posix-argv* list is always empty. If I run the following:

./myfitnessdata.bin myusername mypassword /home/me/data

... then all I get is the usage instructions produced by (show-usage).

I think I must be missing something simple - could someone please let
me know how to (save-lisp-and-die) such that the resultant executable
takes command line arguments?  I suspect that the saved core contains
the empty command line argument list, but I'm not sure how to instruct
save-lisp-or-die to produce a core that replaces that empty list with
whatever is passed from the CLI.

TIA for any help :-)

-- 
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