build-version.scm

;;;; build-version.scm
;
; Copyright (c) 2011-2021, The CHICKEN Team
; 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.
;   Neither the name of the author nor the names of its contributors may be used to endorse or promote
;     products derived from this software without specific prior written permission.
;
; 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 HOLDERS 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.


(declare
 (unit build-version))

;; (read-version filename): Read line from FILENAME and return
;; as a string; return #f if non-existent file or blank line.
(define-syntax read-version
  (er-macro-transformer
   (lambda (x r c)
     (let ((fn (cadr x)))
       (and (##sys#file-exists? fn #t #f #f)
	    (call-with-input-file (cadr x)
	     (lambda (p)
	       (let ((ver ((##sys#slot (##sys#slot p 2) 8) p 256))) ; read-line
		 (if (or (eof-object? ver) (string=? ver ""))
		     #f
		     ver)))))))))

(define ##sys#build-id      (read-version "buildid"))
(define ##sys#build-branch  (read-version "buildbranch"))
(define ##sys#build-version (read-version "buildversion"))