Partially revert e5f5113c21f396705d7479a570c96690135c9d36.

[bpt/guile.git] / meta / guile-config

#!/bin/sh
exec guile -e main -s $0 "$@"
!#
;;;; guile-config --- utility for linking programs with Guile
;;;; Jim Blandy <jim@red-bean.com> --- September 1997
;;;; 
;;;; 	Copyright (C) 1998, 2001, 2004, 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
;;;; 
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;; 
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;;; Lesser General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free
;;;; Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;;;; Boston, MA 02110-1301 USA

;;; This script has been deprecated. Just use pkg-config.

(use-modules (ice-9 popen)
             (ice-9 rdelim))

\f
;;;; main function, command-line processing

;;; The script's entry point.
(define (main args)
  (set-program-name! (car args))
  (let ((args (cdr args)))
    (cond
     ((null? args) (show-help '())
		   (quit 1))
     ((assoc (car args) command-table)
      => (lambda (row)
	   (set! subcommand-name (car args))
	   ((cadr row) (cdr args))))
     (else (show-help '())
	   (quit 1)))))

(define program-name #f)
(define subcommand-name #f)

;;; Given an executable path PATH, set program-name to something
;;; appropriate f or use in error messages (i.e., with leading
;;; directory names stripped).
(define (set-program-name! path)
  (set! program-name (basename path)))

(define (show-help args)
  (cond
   ((null? args) (show-help-overview))
   ((assoc (car args) command-table)
    => (lambda (row) ((caddr row))))
   (else
    (show-help-overview))))

(define (show-help-overview)
  (display-line-error "Usage: ")
  (for-each (lambda (row) ((cadddr row)))
	    command-table))

(define (usage-help)
  (let ((dle display-line-error)
	(p program-name))
    (dle "  " p " --help      - show usage info (this message)")
    (dle "  " p " --help SUBCOMMAND - show help for SUBCOMMAND")))

(define guile-module "guile-2.0")

(define (pkg-config . args)
  (let* ((real-args (cons "pkg-config" args))
         (pipe (apply open-pipe* OPEN_READ real-args))
         (output (read-delimited "" pipe))
         (ret (close-pipe pipe)))
    (case (status:exit-val ret)
      ((0) (if (eof-object? output) "" output))
      (else (display-line-error
             (format #f "error: ~s exited with non-zero error code ~A"
                     (cons "pkg-config" args) (status:exit-val ret)))
            ;; assume pkg-config sent diagnostics to stdout
            (exit (status:exit-val ret))))))

(define (show-version args)
  (format (current-error-port) "~A - Guile version ~A"
          program-name (pkg-config "--modversion" guile-module)))

(define (help-version)
  (let ((dle display-line-error))
    (dle "Usage: " program-name " --version")
    (dle "Show the version of this script.  This is also the version of")
    (dle "Guile this script was installed with.")))

(define (usage-version)
  (display-line-error
   "  " program-name " --version   - show installed script and Guile version"))

\f
;;;; the "link" subcommand

;;; Write a set of linker flags to standard output to include the
;;; libraries that libguile needs to link against.
;;;
;;; In the long run, we want to derive these flags from Guile module
;;; declarations files that are installed along the load path.  For
;;; now, we're just going to reach into Guile's configuration info and
;;; hack it out.
(define (build-link args)
  (display (apply pkg-config "--libs" guile-module args)))

(define (help-link)
  (let ((dle display-line-error))
    (dle "Usage: " program-name " link")
    (dle "Print linker flags for building the `guile' executable.")
    (dle "Print the linker command-line flags necessary to link against")
    (dle "the Guile library, and any other libraries it requires.")))

(define (usage-link)
  (display-line-error
   "  " program-name " link        - print libraries to link with"))


\f
;;;; The "compile" subcommand

(define (build-compile args)
  (display (apply pkg-config "--cflags" guile-module args)))

(define (help-compile)
  (let ((dle display-line-error))
    (dle "Usage: " program-name " compile")
    (dle "Print C compiler flags for compiling code that uses Guile.")
    (dle "This includes any `-I' flags needed to find Guile's header files.")))

(define (usage-compile)
  (display-line-error
   "  " program-name " compile     - print C compiler flags to compile with"))

\f
;;;; The "info" subcommand

(define (build-info args)
  (cond
   ((null? args)
    (display-line-error "guile-config info with no args has been removed")
    (quit 2))
   ((null? (cdr args))
    (cond
     ((string=? (car args) "guileversion")
      (display (pkg-config "--modversion" guile-module)))
     (else
      (display (pkg-config (format #f "--variable=~A" (car args))
                           guile-module)))))
   (else (display-line-error "Usage: " program-name " info VAR")
	 (quit 2))))

(define (help-info)
  (let ((d display-line-error))
    (d "Usage: " program-name " info VAR")
    (d "Display the value of the pkg-config variable VAR used when Guile")
    (d "was built.\n")
    (d "Use this command to find out where Guile was installed,")
    (d "where it will look for Scheme code at run-time, and so on.")))

(define (usage-info)
  (display-line-error
   "  " program-name " info VAR    - print Guile build directories"))

\f
;;;; trivial utilities

(define (display-line . args)
  (apply display-line-port (current-output-port) args))

(define (display-line-error . args)
  (apply display-line-port (current-error-port) args))

(define (display-line-port port . args)
  (for-each (lambda (arg) (display arg port))
	    args)
  (newline port))

\f
;;;; the command table

;;; We define this down here, so Guile builds the list after all the
;;; functions have been defined.
(define command-table
  (list
   (list "--version" show-version help-version usage-version)
   (list "--help" show-help show-help-overview usage-help)
   (list "link" build-link help-link usage-link)
   (list "compile" build-compile help-compile usage-compile)
   (list "info" build-info help-info usage-info)))

\f
;;; Local Variables:
;;; mode: scheme
;;; End: