Reduce explicit sleep calls in t7063 untracked cache tests

Replace sleep calls with backdating of filesystem changes, but first fix the test-tool chmtime functionality to work for directories in Windows.

In this third version, a bug with inaccessible-path-handling that Jeff found is fixed, and a relative-path-avoiding strategy that had been added in t7073 is simplified out after Junio's comments revealed it was misguided.

Tao Klerks (2):
t/helper/test-chmtime: update mingw to support chmtime on directories
t7063: mtime-mangling instead of delays in untracked cache testing

 compat/mingw.c                    | 23 +++++++++++++++++++----
 t/t7063-status-untracked-cache.sh | 21 +++++++++------------
 2 files changed, 28 insertions(+), 16 deletions(-)

base-commit: 4c53a8c20f8984adb226293a3ffd7b88c3f4ac1a
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1166%2FTaoK%2Ftaok-untracked-cache-testing-remote-waits-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1166/TaoK/taok-untracked-cache-testing-remote-waits-v3
Pull-Request: https://github.com/gitgitgadget/git/pull/1166

Range-diff vs v2:

1: 7cdef0ad5fb ! 1: 052b3dd9bba t/helper/test-chmtime: update mingw to support chmtime on directories

     @@ compat/mingw.c: int mingw_utime (const char *file_name, const struct utimbuf *ti
       
      -	if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
      +	osfilehandle = CreateFileW(wfilename,
     -+				   0x100 /*FILE_WRITE_ATTRIBUTES*/,
     ++				   FILE_WRITE_ATTRIBUTES,
      +				   0 /*FileShare.None*/,
      +				   NULL,
      +				   OPEN_EXISTING,
     -+				   attrs & FILE_ATTRIBUTE_DIRECTORY ?
     ++				   (attrs != INVALID_FILE_ATTRIBUTES &&
     ++					(attrs & FILE_ATTRIBUTE_DIRECTORY)) ?
      +					FILE_FLAG_BACKUP_SEMANTICS : 0,
      +				   NULL);
      +	if (osfilehandle == INVALID_HANDLE_VALUE) {
     @@ compat/mingw.c: int mingw_utime (const char *file_name, const struct utimbuf *ti
       		aft = mft;
       	}
      -	if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
     ++
      +	if (!SetFileTime(osfilehandle, NULL, &aft, &mft)) {
       		errno = EINVAL;
       		rc = -1;
 2:  3e3c9c7faac ! 2:  dceb2857609 t7063: mtime-mangling instead of delays in untracked cache testing
     @@ Commit message
          Signed-off-by: Tao Klerks <[email protected]>
      
       ## t/t7063-status-untracked-cache.sh ##
     -@@ t/t7063-status-untracked-cache.sh: sync_mtime () {
     - 	find . -type d -exec ls -ld {} + >/dev/null
     - }
     - 
     -+chmtime_worktree_root () {
     -+	# chmtime doesnt handle relative paths on windows, so need
     -+	# to "hardcode" a reference to the worktree folder name.
     -+	test-tool -C .. chmtime $1 worktree
     -+}
     -+
     - avoid_racy() {
     - 	sleep 1
     - }
      @@ t/t7063-status-untracked-cache.sh: test_expect_success 'setup' '
       	cd worktree &&
       	mkdir done dtwo dthree &&
       	touch one two three done/one dtwo/two dthree/three &&
      +	test-tool chmtime =-300 one two three done/one dtwo/two dthree/three &&
      +	test-tool chmtime =-300 done dtwo dthree &&
     -+	chmtime_worktree_root =-300 &&
     ++	test-tool chmtime =-300 . &&
       	git add one two done/one &&
       	: >.git/info/exclude &&
       	git update-index --untracked-cache &&
     @@ t/t7063-status-untracked-cache.sh: test_expect_success 'create/modify files, som
      -	rm base &&
      +	test-tool chmtime =-180 done/two done/three done/four done/five done &&
      +	# we need to ensure that the root dir is touched (in the past);
     -+	chmtime_worktree_root =-180 &&
     ++	test-tool chmtime =-180 . &&
       	sync_mtime
       '

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