bug#35418: [PATCH] Don't poll auto-revert files that use notification

[Zhang Haijun <ccsmile2008@outlook.com>]

If both file watching and directory watching are used for one file, it will works for all use cases.

> 在 2019年5月1日，上午10:59，张海君 <ccsmile2008@outlook.com> 写道：
> 
> I haven’t run the test before. It seems that directory watching doesn’t work for file content only change. But it works for many common use cases while file watching doesn’t work.
> 
> 1. Use vim to modify the file and save. It seems that vim will write to a temp file, then remove the original file and then rename the temp file to original file name.
> 2. Use git to switch branch.
> 3. For files in a soft link directory.
> 
> So directory watching is much more usefull for me than file watching in everyday use. 
> 
> 
> 
>> 在 2019年5月1日，上午10:15，张海君 <ccsmile2008@outlook.com> 写道：
>> 
>> 
>>> I don't understand the patch. Symbol kqueue11 does not exist, so do you mean
>>> 
>>> +                  func dir
>> Yes.
>> 
>>> 
>>> And have you applied the tests in filenotify-tests.el? Do all of them pass?
>>> 
>>> Best regards, Michael.
>> 
>> $ make -C test autorevert-tests
>> ELC      lisp/autorevert-tests.elc
>> GEN      lisp/autorevert-tests.log
>> Running 5 tests (2019-05-01 10:06:38+0800)
>> Reverting buffer `auto-revert-testqe4qed'.
>> passed  1/5  auto-revert-test00-auto-revert-mode
>> (Shell command succeeded with no output)
>> Test auto-revert-test01-auto-revert-several-files backtrace:
>> signal(ert-test-failed (((should (string-match "another text" (buffe
>> ert-fail(((should (string-match "another text" (buffer-string))) :fo
>> (if (unwind-protect (setq value-40 (apply fn-38 args-39)) (setq form
>> (let (form-description-42) (if (unwind-protect (setq value-40 (apply
>> (let ((value-40 (quote ert-form-evaluation-aborted-41))) (let (form-
>> (let* ((fn-38 (function string-match)) (args-39 (condition-case err
>> (save-current-buffer (set-buffer buf) (auto-revert--wait-for-revert
>> (while --dolist-tail-- (setq buf (car --dolist-tail--)) (save-curren
>> (let ((--dolist-tail-- (list buf1 buf2)) buf) (while --dolist-tail--
>> (progn (write-region "any text" nil tmpfile1 nil (quote no-message))
>> (unwind-protect (progn (write-region "any text" nil tmpfile1 nil (qu
>> (let* ((auto-revert--messages "") (g30 (function (lambda (msg) (setq
>> (unwind-protect (let* ((auto-revert--messages "") (g30 (function (la
>> (let* ((cp (executable-find "cp")) (tmpdir1 (make-temp-file "auto-re
>> (lambda nil (let* ((fn-23 (function executable-find)) (args-24 (cond
>> ert--run-test-internal(#s(ert--test-execution-info :test #s(ert-test
>> ert-run-test(#s(ert-test :name auto-revert-test01-auto-revert-severa
>> ert-run-or-rerun-test(#s(ert--stats :selector (not (tag :unstable))
>> ert-run-tests((not (tag :unstable)) #f(compiled-function (event-type
>> ert-run-tests-batch((not (tag :unstable)))
>> ert-run-tests-batch-and-exit((not (tag :unstable)))
>> eval((ert-run-tests-batch-and-exit (quote (not (tag :unstable)))))
>> command-line-1(("-L" ":." "-l" "ert" "-l" "lisp/autorevert-tests.el"
>> command-line()
>> normal-top-level()
>> Test auto-revert-test01-auto-revert-several-files condition:
>>  (ert-test-failed
>>   ((should
>>     (string-match "another text"
>>                   (buffer-string)))
>>    :form
>>    (string-match "another text" "any text")
>>    :value nil))
>> FAILED  2/5  auto-revert-test01-auto-revert-several-files
>> Reverting buffer `auto-revert-test49vRly'.
>> Reverting buffer `auto-revert-test49vRly'.
>> Reverting buffer `auto-revert-test49vRly'.
>> passed  3/5  auto-revert-test02-auto-revert-deleted-file
>> Reverting buffer `auto-revert-testvVIyEY'.
>> passed  4/5  auto-revert-test03-auto-revert-tail-mode
>> ls does not support --dired; see `dired-use-ls-dired' for more details.
>> Reverting buffer `T'.
>> Reverting buffer `T'.
>> passed  5/5  auto-revert-test04-auto-revert-mode-dired
>> 
>> Ran 5 tests, 4 results as expected, 1 unexpected (2019-05-01 10:07:23+0800)
>> 
>> 1 unexpected results:
>> FAILED  auto-revert-test01-auto-revert-several-files
>> 
>> make[1]: *** [lisp/autorevert-tests.log] Error 1
>> make: *** [lisp/autorevert-tests] Error 2
>> 
>