;; -*- emacs-lisp -*-

;; Copyright (C) 2015-2016 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This file generates dependencies between test files and the files
;; that they test.

;; It has an .emacs-lisp extension because it makes the Makefile easier!

(require 'seq)

(defun make-test-deps (src-dir)
  (let ((src-dir (file-truename src-dir)))
    (message
     "%s"
     (concat
      (make-test-deps-lisp src-dir)
      (make-test-deps-src src-dir)))))

(defun make-test-deps-lisp (src-dir)
  (mapconcat
   (lambda (file-without-suffix)
     (format "./%s-tests.log: %s/../%s.el\n"
             file-without-suffix
             src-dir
             file-without-suffix))
   (make-test-test-files src-dir "lisp") ""))

(defun make-test-deps-src (src-dir)
  (mapconcat
   (lambda (file-without-suffix)
     (format "./%s-tests.log: %s/../%s.c\n"
             file-without-suffix
             src-dir
             file-without-suffix))
   (make-test-test-files src-dir "src") ""))

(defun make-test-test-files (src-dir sub-src-dir)
  (make-test-munge-files
   src-dir
   (directory-files-recursively
    (concat src-dir "/"  sub-src-dir)
    ".*-tests.el$")))

(defun make-test-munge-files (src-dir files)
  (make-test-sans-suffix
   (make-test-de-stem
    src-dir
    (make-test-no-legacy
     (make-test-no-test-dir
      (make-test-no-resources
       files))))))

(defun make-test-sans-suffix (files)
  (mapcar
   (lambda (file)
     (substring file 0 -9))
   files))

(defun make-test-de-stem (stem files)
  (mapcar
   (lambda (file)
     (substring
      file
      (+ 1 (length stem))))
   files))

(defun make-test-no-legacy (list)
  (make-test-remove list "legacy/"))

(defun make-test-no-resources (list)
  (make-test-remove list "-resources/"))

(defun make-test-no-test-dir (list)
  (make-test-remove list "-tests/"))

(defun make-test-remove (list match)
  (seq-remove
   (lambda (file)
     (string-match-p match file))
   list))