libreboot/resources/scripts/misc/check-trailing-newline

#!/usr/bin/env guile
-*- scheme -*-
!#
;;; check-trailing-newline -- Find files lacking a trailing newline
;;; Use guile 2 (not 1.8)
;;; Copyright (C) 2015  Mark H Weaver <mhw@netris.org>
;;;
;;; This program is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation, either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; This program 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 General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.

(use-modules (ice-9 match)
             (rnrs io ports))

(define (check-file file-name)
  (let ((contents (call-with-input-file file-name get-string-all)))
    (unless (string-suffix? "\n" contents)
      (format (current-error-port)
              "~a: lacks trailing newline\n"
              file-name))))

(match (command-line)
  ((_ file-names ...)
   (for-each check-file file-names)))