mdw@git.distorted.org.uk Git - clg/blob - tools/config.lisp

   1 (defpackage #:pkg-config
   2   (:use #:common-lisp)
   3   (:export #:pkg-cflags #:pkg-libs #:pkg-exists-p #:pkg-version
   4            #:pkg-variable))
   5
   6 (in-package #:pkg-config)
   7
   8 (defparameter *pkg-config* "pkg-config")
   9
  10 (defun split-string (string &key (start 0) (end (length string)))
  11   (let ((position (position #\sp string :start start :end end)))
  12     (cond
  13      ((zerop (- end start)) nil)
  14      ((not position) (list (subseq string start end)))
  15      ((= position start) (split-string string :start (1+ start) :end end))
  16      (t (cons
  17          (subseq string start position)
  18          (split-string string :start (1+ position) :end end))))))
  19
  20
  21 (defun read-lines (&optional (stream *standard-input*))
  22   (let ((line (read-line stream nil)))
  23     (when line
  24       (cons line (read-lines stream)))))
  25
  26
  27 (defun read-string (&optional (stream *standard-input*)
  28                     (delimiter #\newline) (eof-error-p t) eof-value)
  29   (let ((string (make-array 0 :element-type 'character
  30                             :fill-pointer t :adjustable t)))
  31     ;; I really need to learn how to use the loop facility
  32     (labels ((read-chars ()
  33                (let ((char (read-char stream (and eof-error-p delimiter))))
  34                  (when char
  35                    (vector-push-extend char string)
  36                    (unless (eq char delimiter)
  37                      (read-chars))))))
  38       (read-chars))
  39     (cond
  40      ((not (zerop (length string))) string)
  41      ((not eof-error-p) eof-value)
  42      ((error 'end-of-file :stream stream)))))
  43
  44
  45 (defun run-pkg-config (package error &rest options)
  46   (let ((process
  47          (ext:run-program
  48           *pkg-config* (cons package options) :wait t :output :stream)))
  49     (unless process
  50       (error "Unable to run ~A" *pkg-config*))
  51     (let ((exit-code (ext:process-exit-code process)))
  52       (unless (or (not error) (zerop exit-code))
  53         (error
  54          (or
  55           (read-string (ext:process-error process) nil)
  56           (format nil "~A terminated with exit code ~A"
  57                   *pkg-config* exit-code))))
  58       (let ((output (read-lines (ext:process-output process))))
  59         (ext:process-close process)
  60         (values output exit-code)))))
  61
  62
  63 (defun pkg-cflags (package)
  64   (split-string (first (run-pkg-config package t "--cflags"))))
  65
  66 (defun pkg-libs (package)
  67   (split-string (first (run-pkg-config package t "--libs"))))
  68
  69
  70 (defun pkg-exists-p (package &key version atleast-version max-version
  71                      ( error t))
  72   (let ((version-check
  73          (cond
  74           (version (format nil "= ~A" version))
  75           (atleast-version (format nil ">= ~A" atleast-version))
  76           (max-version (format nil "<= ~A" max-version))
  77           (t ""))))
  78     (if error
  79         (progn
  80           (run-pkg-config package t "--print-errors" "--exists" version-check)
  81           t)
  82       (multiple-value-bind (output exit-code)
  83           (run-pkg-config package nil "--exists" version-check)
  84         (declare (ignore output))
  85         (zerop exit-code)))))
  86
  87
  88 (defun pkg-version (package)
  89   (first (run-pkg-config package t "--modversion")))
  90
  91
  92 (defun pkg-variable (package variable)
  93   (first (run-pkg-config package t "--variable" variable)))