annotate tests/test-bookmarks.out @ 11769:ca6cebd8734e stable

dirstate: ignore symlinks when fs cannot handle them (issue1888)

When the filesystem cannot handle the executable bit, we currently
ignore it completely when looking for modified files. Similarly, it is
impossible to set or clear the bit when the filesystem ignores it.

This patch makes Mercurial treat symbolic links the same way.

Symlinks are a little different since they manifest themselves as
small files containing a filename (the symlink target). On Windows,
these files show up as regular files, and on Linux and Mac they show
up as real symlinks.

Issue1888 presents a case where the symlink files are better ignored
from the Windows side. A Linux client creates symlinks in a working
copy which is shared over a network between Linux and Windows clients.

The Samba server is helpful and defererences the symlink when the
Windows client looks at it. This means that Mercurial on the Windows
side sees file content instead of a file name in the symlink, and
hence flags the link as modified. Ignoring the change would be much
more helpful, similarly to how Mercurial does not report any changes
when executable bits are ignored in a checkout on Windows.

An initial checkout of a symbolic link on a file system that cannot
handle symbolic links will still result in a regular file containing
the target file name as its content. Sharing such a checkout with a
Linux client will not turn the file into a symlink automatically, but
'hg revert' can fix that. After the revert, the Windows client will
see the correct file content (provided by the Samba server when it
follows the link on the Linux side) and otherwise ignore the change.

Running 'hg perfstatus' 10 times gives these results:

  Before:          After:
  min: 0.544703    min: 0.546549
  med: 0.547592    med: 0.548881
  avg: 0.549146    avg: 0.548549
  max: 0.564112    max: 0.551504

The median time is increased about 0.24%.

% no bookmarks
no bookmarks set
% bookmark rev -1
% list bookmarks
 * X                         -1:000000000000
% list bookmarks with color
 * X                         -1:000000000000
% bookmark X moved to rev 0
 * X                         0:f7b1eb17ad24
% look up bookmark
changeset:   0:f7b1eb17ad24
tag:         X
tag:         tip
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     0

% second bookmark for rev 0
% bookmark rev -1 again
% list bookmarks
 * X2                        0:f7b1eb17ad24
 * X                         0:f7b1eb17ad24
   Y                         -1:000000000000
% bookmarks X and X2 moved to rev 1, Y at rev -1
 * X2                        1:925d80f479bb
 * X                         1:925d80f479bb
   Y                         -1:000000000000
% bookmark rev 0 again
% bookmarks X and X2 moved to rev 2, Y at rev -1, Z at rev 0
 * X2                        2:0316ce92851d
 * X                         2:0316ce92851d
   Z                         0:f7b1eb17ad24
   Y                         -1:000000000000
% rename nonexistent bookmark
abort: a bookmark of this name does not exist
% rename to existent bookmark
abort: a bookmark of the same name already exists
% force rename to existent bookmark
% list bookmarks
 * X2                        2:0316ce92851d
 * Y                         2:0316ce92851d
   Z                         0:f7b1eb17ad24
% rename without new name
abort: new bookmark name required
% delete without name
abort: bookmark name required
% delete nonexistent bookmark
abort: a bookmark of this name does not exist
% bookmark name with spaces should be stripped
% list bookmarks
 * X2                        2:0316ce92851d
 * Y                         2:0316ce92851d
   Z                         0:f7b1eb17ad24
 * x  y                      2:0316ce92851d
% look up stripped bookmark name
changeset:   2:0316ce92851d
tag:         X2
tag:         Y
tag:         tip
tag:         x  y
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     2

% reject bookmark name with newline
abort: bookmark name cannot contain newlines
% bookmark with existing name
abort: a bookmark of the same name already exists
% force bookmark with existing name
% list bookmarks
 * X2                        2:0316ce92851d
 * Y                         2:0316ce92851d
 * Z                         2:0316ce92851d
 * x  y                      2:0316ce92851d
% revision but no bookmark name
abort: bookmark name required
% bookmark name with whitespace only
abort: bookmark names cannot consist entirely of whitespace