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;;; cus-test.el --- tests for custom types and load problems

;; Copyright (C) 1998, 2000, 2002-2014 Free Software Foundation, Inc.

;; Author: Markus Rost <markus.rost@mathematik.uni-regensburg.de>
;; Maintainer: Markus Rost <rost@math.ohio-state.edu>
;; Created: 13 Sep 1998
;; Keywords: maint

;; 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 provides simple tests to detect custom options with
;; incorrect customization types and load problems for custom and
;; autoload dependencies.
;;
;; The basic tests can be run in batch mode.  Invoke them with
;;
;;   src/emacs -batch -l admin/cus-test.el -f cus-test-opts [all]
;;
;;   src/emacs -batch -l admin/cus-test.el -f cus-test-deps
;;
;;   src/emacs -batch -l admin/cus-test.el -f cus-test-libs [all]
;;
;;   src/emacs -batch -l admin/cus-test.el -f cus-test-noloads
;;
;; in the emacs source directory.
;;
;; For interactive use: Load this file.  Then
;;
;;    M-x cus-test-apropos REGEXP RET
;;
;; checks the options matching REGEXP.  In particular
;;
;;    M-x cus-test-apropos RET
;;
;; checks all options.  The detected options are stored in the
;; variable `cus-test-errors'.
;;
;; Only those options are checked which have been already loaded.
;; Therefore `cus-test-apropos' is more efficient after loading many
;; libraries.
;;
;;    M-x cus-test-load-custom-loads
;;
;; loads all (!) custom dependencies and
;;
;;    M-x cus-test-load-libs
;;
;; loads all (!) libraries with autoloads.
;;
;; Options with a custom-get property, usually defined by a :get
;; declaration, are stored in the variable
;;
;; `cus-test-vars-with-custom-get'
;;
;; Options with a state of 'changed ("changed outside the customize
;; buffer") are stored in the variable
;;
;; `cus-test-vars-with-changed-state'
;;
;; These lists are prepared just in case one wants to investigate
;; those options further.
;;
;; The command `cus-test-opts' tests many (all?) custom options.
;;
;; The command `cus-test-deps' is like `cus-test-load-custom-loads'
;; but reports about load errors.
;;
;; The command `cus-test-libs' runs for all libraries with autoloads
;; separate emacs processes of the form "emacs -batch -l LIB".
;;
;; The command `cus-test-noloads' returns a list of variables which
;; are somewhere declared as custom options, but not loaded by
;; `custom-load-symbol'.

\f
;;; Code:

;;; Workarounds.  For a smooth run and to avoid some side effects.

(defvar cus-test-after-load-libs-hook nil
  "Used to switch off undesired side effects of loading libraries.")

(defvar cus-test-skip-list nil
  "List of variables to disregard by `cus-test-apropos'.")

(defvar cus-test-libs-noloads
  ;; Loading dunnet in batch mode leads to a Dead end.
  ;; blessmail writes a file.
  ;; characters cannot be loaded twice ("Category `a' is already defined").
  '("play/dunnet.el" "emulation/edt-mapper.el"
    "loadup.el" "mail/blessmail.el" "international/characters.el"
    "cedet/ede/loaddefs.el" "cedet/semantic/loaddefs.el"
    "net/tramp-loaddefs.el")
  "List of files not to load by `cus-test-load-libs'.
Names should be as they appear in loaddefs.el.")

;; This avoids a hang of `cus-test-apropos' in 21.2.
;; (add-to-list 'cus-test-skip-list 'sh-alias-alist)

(or noninteractive
    ;; Never Viperize.
    (setq viper-mode nil))

;; Don't create a file `save-place-file'.
(eval-after-load "saveplace"
  '(remove-hook 'kill-emacs-hook 'save-place-kill-emacs-hook))

;; Don't create a file `abbrev-file-name'.
(setq save-abbrevs nil)

;; Avoid compile logs from adviced functions.
(eval-after-load "bytecomp"
  '(setq ad-default-compilation-action 'never))

\f
;;; Main code:

;; We want to log all messages.
(setq message-log-max t)

(require 'cus-edit)
(require 'cus-load)

(defvar cus-test-errors nil
  "List of problematic variables found by `cus-test-apropos'.")

(defvar cus-test-tested-variables nil
  "List of options tested by last call of `cus-test-apropos'.")

;; I haven't understood this :get stuff.  The symbols with a
;; custom-get property are stored here.
(defvar cus-test-vars-with-custom-get nil
  "Set by `cus-test-apropos' to a list of options with :get property.")

(defvar cus-test-vars-with-changed-state nil
  "Set by `cus-test-apropos' to a list of options with state 'changed.")

(defvar cus-test-deps-errors nil
  "List of require/load problems found by `cus-test-deps'.")

(defvar cus-test-deps-required nil
  "List of dependencies required by `cus-test-deps'.
Only unloaded features will be require'd.")

(defvar cus-test-deps-loaded nil
  "List of dependencies loaded by `cus-test-deps'.")

(defvar cus-test-libs-errors nil
  "List of load problems found by `cus-test-load-libs' or `cus-test-libs'.")

(defvar cus-test-libs-loaded nil
  "List of files loaded by `cus-test-load-libs' or `cus-test-libs'.")

(defvar cus-test-vars-not-cus-loaded nil
  "A list of options not loaded by `custom-load-symbol'.
Set by `cus-test-noloads'.")

;; (defvar cus-test-vars-cus-loaded nil
;;   "A list of options loaded by `custom-load-symbol'.")

(defun cus-test-apropos (regexp)
  "Check the options matching REGEXP.
The detected problematic options are stored in `cus-test-errors'."
  (interactive "sVariable regexp: ")
  (setq cus-test-errors nil)
  (setq cus-test-tested-variables nil)
  (mapc
   (lambda (symbol)
     (push symbol cus-test-tested-variables)
     ;; Be verbose in case we hang.
     (message "Cus Test running...%s %s"
              (length cus-test-tested-variables) symbol)
     (condition-case alpha
         ;; FIXME This defaults to 'sexp if no type was specified.
         ;; Always report such instances as a type mismatch.
         ;; Currently abusing cusver-scan to do that.
         (let* ((type (custom-variable-type symbol))
                (conv (widget-convert type))
                (get (or (get symbol 'custom-get) 'default-value))
                values
                mismatch)
           (when (default-boundp symbol)
             (push (funcall get symbol) values)
             (push (eval (car (get symbol 'standard-value))) values))
           (if (boundp symbol)
               (push (symbol-value symbol) values))
           ;; That does not work.
           ;; (push (widget-get conv :value) values)

           ;; Check the values
           (mapc (lambda (value)
                   ;; TODO for booleans, check for values that can be
                   ;; evaluated and are not t or nil.  Usually a bug.
                   (unless (widget-apply conv :match value)
                     (setq mismatch 'mismatch)))
                 values)

           ;; Store symbols with a custom-get property.
           (when (get symbol 'custom-get)
             (add-to-list 'cus-test-vars-with-custom-get symbol))

           ;; Changed outside the customize buffer?
           ;; This routine is not very much tested.
           (let ((c-value
                  (or (get symbol 'customized-value)
                      (get symbol 'saved-value)
                      (get symbol 'standard-value))))
             (and (consp c-value)
                  (boundp symbol)
                  (not (equal (eval (car c-value)) (symbol-value symbol)))
                  (add-to-list 'cus-test-vars-with-changed-state symbol)))

           (if mismatch
               (push symbol cus-test-errors)))

       (error
        (push symbol cus-test-errors)
        (message "Error for %s: %s" symbol alpha))))
   (cus-test-get-options regexp))
  (message "%s options tested"
           (length cus-test-tested-variables))
  (cus-test-errors-display))

(defun cus-test-cus-load-groups (&optional cus-load)
  "Return a list of current custom groups.
If CUS-LOAD is non-nil, include groups from cus-load.el."
  (append (mapcar 'cdr custom-current-group-alist)
          (if cus-load
              (with-temp-buffer
                (insert-file-contents (locate-library "cus-load.el"))
                (search-forward "(put '")
                (beginning-of-line)
                (let (res)
                  (while (and (looking-at "^(put '\\(\\S-+\\)")
                              (zerop (forward-line 1)))
                    (push (intern (match-string 1)) res))
                  res)))))

(defun cus-test-get-options (regexp &optional group)
  "Return a list of custom options matching REGEXP.
If GROUP is non-nil, return groups rather than options.
If GROUP is `cus-load', include groups listed in cus-loads as well as
currently defined groups."
  (let ((groups (if group (cus-test-cus-load-groups (eq group 'cus-load))))
        found)
    (mapatoms
     (lambda (symbol)
       (and
        (if group
            (memq symbol groups)
          (or
           ;; (user-variable-p symbol)
           (get symbol 'standard-value)
           ;; (get symbol 'saved-value)
           (get symbol 'custom-type)))
        (string-match regexp (symbol-name symbol))
        (not (member symbol cus-test-skip-list))
        (push symbol found))))
    found))

(defun cus-test-errors-display ()
  "Report about the errors found by cus-test."
  (with-output-to-temp-buffer "*cus-test-errors*"
    (set-buffer standard-output)
    (insert (format "Cus Test tested %s variables.\
  See `cus-test-tested-variables'.\n\n"
                    (length cus-test-tested-variables)))
    (if (not cus-test-errors)
        (insert "No errors found by cus-test.")
      (insert "The following variables seem to have problems:\n\n")
      (dolist (e cus-test-errors)
        (insert (symbol-name e) "\n")))))

(defun cus-test-load-custom-loads ()
  "Call `custom-load-symbol' on all atoms."
  (interactive)
  (if noninteractive (let (noninteractive) (require 'dunnet)))
  (mapatoms 'custom-load-symbol)
  (run-hooks 'cus-test-after-load-libs-hook))

(defmacro cus-test-load-1 (&rest body)
  `(progn
     (setq cus-test-libs-errors nil
           cus-test-libs-loaded nil)
     ,@body
     (message "%s libraries loaded successfully"
              (length cus-test-libs-loaded))
     (if (not cus-test-libs-errors)
         (message "No load problems encountered")
       (message "The following load problems appeared:")
       (cus-test-message cus-test-libs-errors))
     (run-hooks 'cus-test-after-load-libs-hook)))

;; This is just cus-test-libs, but loading in the current Emacs process.
(defun cus-test-load-libs (&optional more)
  "Load the libraries with autoloads.
Don't load libraries in `cus-test-libs-noloads'.
If optional argument MORE is \"defcustom\", load all files with defcustoms.
If it is \"all\", load all Lisp files."
  (interactive)
  (cus-test-load-1
   (let ((lispdir (file-name-directory (locate-library "loaddefs"))))
     (mapc
      (lambda (file)
        (condition-case alpha
            (unless (member file cus-test-libs-noloads)
              (load (file-name-sans-extension (expand-file-name file lispdir)))
              (push file cus-test-libs-loaded))
          (error
           (push (cons file alpha) cus-test-libs-errors)
           (message "Error for %s: %s" file alpha))))
      (if more
          (cus-test-get-lisp-files (equal more "all"))
        (cus-test-get-autoload-deps))))))

(defun cus-test-get-autoload-deps ()
  "Return the list of files with autoloads."
  (with-temp-buffer
    (insert-file-contents (locate-library "loaddefs"))
    (let (files)
      (while (search-forward "\n;;; Generated autoloads from " nil t)
        (push (buffer-substring (match-end 0) (line-end-position)) files))
      files)))

(defun cus-test-get-lisp-files (&optional all)
  "Return list of all Lisp files with defcustoms.
Optional argument ALL non-nil means list all (non-obsolete) Lisp files."
  (let ((default-directory (expand-file-name "lisp/" source-directory))
        (msg "Finding files..."))
    (message "%s" msg)
    (prog1
        ;; Hack to remove leading "./".
        (mapcar (lambda (e) (substring e 2))
                (apply 'process-lines find-program
                       "-name" "obsolete" "-prune" "-o"
                       "-name" "[^.]*.el" ; ignore .dir-locals.el
                       (if all
                           '("-print")
                         (list "-exec" grep-program
                               "-l" "^[ \t]*(defcustom" "{}" "+"))))
      (message "%sdone" msg))))

(defun cus-test-message (list)
  "Print the members of LIST line by line."
  (dolist (m list) (message "%s" m)))

\f
;;; The routines for batch mode:

(defun cus-test-opts (&optional all)
  "Test custom options.
This function is suitable for batch mode.  E.g., invoke

  src/emacs -batch -l admin/cus-test.el -f cus-test-opts

in the Emacs source directory.
Normally only tests options belonging to files in loaddefs.el.
If optional argument ALL is non-nil, test all files with defcustoms."
  (interactive)
  (and noninteractive
       command-line-args-left
       (setq all (pop command-line-args-left)))
  (message "Running %s" 'cus-test-load-libs)
  (cus-test-load-libs (if all "defcustom"))
  (message "Running %s" 'cus-test-load-custom-loads)
  (cus-test-load-custom-loads)
  (message "Running %s" 'cus-test-apropos)
  (cus-test-apropos "")
  (if (not cus-test-errors)
      (message "No problems found")
    (message "The following options might have problems:")
    (cus-test-message cus-test-errors)))

(defun cus-test-deps ()
  "Run a verbose version of `custom-load-symbol' on all atoms.
This function is suitable for batch mode.  E.g., invoke

  src/emacs -batch -l admin/cus-test.el -f cus-test-deps

in the Emacs source directory."
  (interactive)
  (setq cus-test-deps-errors nil)
  (setq cus-test-deps-required nil)
  (setq cus-test-deps-loaded nil)
  (mapatoms
   ;; This code is mainly from `custom-load-symbol'.
   (lambda (symbol)
     (let ((custom-load-recursion t))
       (dolist (load (get symbol 'custom-loads))
         (cond
          ((symbolp load)
           ;; (condition-case nil (require load) (error nil))
           (condition-case alpha
               (unless (or (featurep load)
                           (and noninteractive (eq load 'dunnet)))
                 (require load)
                 (push (list symbol load) cus-test-deps-required))
             (error
              (push (list symbol load alpha) cus-test-deps-errors)
              (message "Require problem: %s %s %s" symbol load alpha))))
          ((equal load "loaddefs")
           (push
            (message "Symbol %s has loaddefs as custom dependency" symbol)
            cus-test-deps-errors))
          ;; This is subsumed by the test below, but it's much
          ;; faster.
          ((assoc load load-history))
          ;; This was just
          ;; (assoc (locate-library load) load-history)
          ;; but has been optimized not to load locate-library
          ;; if not necessary.
          ((let ((regexp (concat "\\(\\`\\|/\\)" (regexp-quote load)
                                 "\\(\\'\\|\\.\\)"))
                 (found nil))
             (dolist (loaded load-history)
               (and (stringp (car loaded))
                    (string-match regexp (car loaded))
                    (setq found t)))
             found))
          ;; Without this, we would load cus-edit recursively.
          ;; We are still loading it when we call this,
          ;; and it is not in load-history yet.
          ((equal load "cus-edit"))
          ;; This would ignore load problems with files in
          ;; lisp/term/
          ;; ((locate-library (concat term-file-prefix load)))
          (t
           ;; (condition-case nil (load load) (error nil))
           (condition-case alpha
               (progn
                 (load load)
                 (push (list symbol load) cus-test-deps-loaded))
             (error
              (push (list symbol load alpha) cus-test-deps-errors)
              (message "Load Problem: %s %s %s" symbol load alpha))))
          )))))
  (message "%s features required"
           (length cus-test-deps-required))
  (message "%s files loaded"
           (length cus-test-deps-loaded))
  (if (not cus-test-deps-errors)
      (message "No load problems encountered")
    (message "The following load problems appeared:")
    (cus-test-message cus-test-deps-errors))
  (run-hooks 'cus-test-after-load-libs-hook))

(defun cus-test-libs (&optional more)
  "Load the libraries with autoloads in separate processes.
This function is useful to detect load problems of libraries.
It is suitable for batch mode.  E.g., invoke

  ./src/emacs -batch -l admin/cus-test.el -f cus-test-libs

in the Emacs source directory.

If optional argument MORE is \"defcustom\", load all files with defcustoms.
If it is \"all\", load all Lisp files."
  (interactive)
  (and noninteractive
       command-line-args-left
       (setq more (pop command-line-args-left)))
  (cus-test-load-1
   (let* ((default-directory source-directory)
          (emacs (expand-file-name "src/emacs"))
          skipped)
     (or (file-executable-p emacs)
         (error "No such executable `%s'" emacs))
     (mapc
      (lambda (file)
        (if (member file cus-test-libs-noloads)
            (push file skipped)
          (condition-case alpha
              (let* ((fn (expand-file-name file "lisp/"))
                     (elc (concat fn "c"))
                     status)
                (if (file-readable-p elc) ; load compiled if present (faster)
                    (setq fn elc)
                  (or (file-readable-p fn)
                      (error "Library %s not found" file)))
                (if (equal 0 (setq status (call-process emacs nil nil nil
                                                        "-batch" "-l" fn)))
                    (message "%s" file)
                  (error "%s" status))
                (push file cus-test-libs-loaded))
            (error
             (push (cons file alpha) cus-test-libs-errors)
             (message "Error for %s: %s" file alpha)))))
      (if more
          (cus-test-get-lisp-files (equal more "all"))
        (cus-test-get-autoload-deps)))
     (message "Default directory: %s" default-directory)
     (when skipped
       (message "The following libraries were skipped:")
       (cus-test-message skipped)))))

(defun cus-test-noloads ()
  "Find custom options not loaded by `custom-load-symbol'.
Calling this function after `cus-test-load-libs' is not meaningful.
It is suitable for batch mode.  E.g., invoke

  src/emacs -batch -l admin/cus-test.el -f cus-test-noloads

in the Emacs source directory."
  (interactive)
  (let ((groups-loaded (cus-test-get-options "" 'cus-load))
        cus-loaded groups-not-loaded)

    (message "Running %s" 'cus-test-load-custom-loads)
    (cus-test-load-custom-loads)
    (setq cus-loaded (cus-test-get-options ""))

    (message "Running %s" 'cus-test-load-libs)
    (cus-test-load-libs "all")
    (setq cus-test-vars-not-cus-loaded (cus-test-get-options "")
          groups-not-loaded (cus-test-get-options "" t))

    (dolist (o cus-loaded)
      (setq cus-test-vars-not-cus-loaded
            (delete o cus-test-vars-not-cus-loaded)))

    (if (not cus-test-vars-not-cus-loaded)
        (message "No options not loaded by custom-load-symbol found")
      (message "The following options were not loaded by custom-load-symbol:")
      (cus-test-message
       (sort cus-test-vars-not-cus-loaded 'string<)))

    (dolist (o groups-loaded)
      (setq groups-not-loaded (delete o groups-not-loaded)))

    (if (not groups-not-loaded)
        (message "No groups not in cus-load.el found")
      (message "The following groups are not in cus-load.el:")
      (cus-test-message (sort groups-not-loaded 'string<)))))

(provide 'cus-test)

;;; cus-test.el ends here