view tests/test-branches.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%.

marked working directory as branch a
marked working directory as branch q
reset working directory to branch a
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
marked working directory as branch b
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
marked working directory as branch c
abort: the name 'tip' is reserved
abort: the name 'null' is reserved
abort: the name '.' is reserved
marked working directory as branch a branch name much longer than the default justification used by branches
a branch name much longer than the default justification used by branches 7:10ff5895aa57
b                              4:aee39cd168d0
c                              6:589736a22561 (inactive)
a                              5:d8cbc61dbaa6 (inactive)
default                        0:19709c5a4e75 (inactive)
-------
a branch name much longer than the default justification used by branches 7:10ff5895aa57
b                              4:aee39cd168d0
--- Branch a
changeset:   5:d8cbc61dbaa6
branch:      a
parent:      2:881fe2b92ad0
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     Adding b branch head 2

changeset:   2:881fe2b92ad0
branch:      a
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     Adding to a branch

changeset:   1:dd6b440dd85a
branch:      a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     Adding a branch

---- Branch b
changeset:   4:aee39cd168d0
branch:      b
user:        test
date:        Thu Jan 01 00:00:03 1970 +0000
summary:     Adding b branch head 1

changeset:   3:ac22033332d1
branch:      b
parent:      0:19709c5a4e75
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     Adding b branch

---- going to test branch closing
a branch name much longer than the default justification used by branches 7:10ff5895aa57
b                              4:aee39cd168d0
c                              6:589736a22561 (inactive)
a                              5:d8cbc61dbaa6 (inactive)
default                        0:19709c5a4e75 (inactive)
2 files updated, 0 files merged, 4 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
created new head
b                             10:bfbe841b666e
a branch name much longer than the default justification used by branches 7:10ff5895aa57
c                              6:589736a22561 (inactive)
a                              5:d8cbc61dbaa6 (inactive)
default                        0:19709c5a4e75 (inactive)
changeset:   10:bfbe841b666e
branch:      b
tag:         tip
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     adding another cset to branch b

changeset:   8:eebb944467c9
branch:      b
parent:      4:aee39cd168d0
user:        test
date:        Thu Jan 01 00:00:07 1970 +0000
summary:     adding cset to branch b

changeset:   7:10ff5895aa57
branch:      a branch name much longer than the default justification used by branches
user:        test
date:        Thu Jan 01 00:00:06 1970 +0000
summary:     Adding d branch

changeset:   6:589736a22561
branch:      c
user:        test
date:        Thu Jan 01 00:00:05 1970 +0000
summary:     Adding c branch

changeset:   5:d8cbc61dbaa6
branch:      a
parent:      2:881fe2b92ad0
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     Adding b branch head 2

changeset:   0:19709c5a4e75
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     Adding root node

changeset:   10:bfbe841b666e
branch:      b
tag:         tip
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     adding another cset to branch b

changeset:   8:eebb944467c9
branch:      b
parent:      4:aee39cd168d0
user:        test
date:        Thu Jan 01 00:00:07 1970 +0000
summary:     adding cset to branch b

changeset:   7:10ff5895aa57
branch:      a branch name much longer than the default justification used by branches
user:        test
date:        Thu Jan 01 00:00:06 1970 +0000
summary:     Adding d branch

changeset:   6:589736a22561
branch:      c
user:        test
date:        Thu Jan 01 00:00:05 1970 +0000
summary:     Adding c branch

changeset:   5:d8cbc61dbaa6
branch:      a
parent:      2:881fe2b92ad0
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     Adding b branch head 2

changeset:   0:19709c5a4e75
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     Adding root node

b                              8:eebb944467c9
a branch name much longer than the default justification used by branches 7:10ff5895aa57
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
--- b branch should be inactive
a branch name much longer than the default justification used by branches 7:10ff5895aa57
c                              6:589736a22561 (inactive)
a                              5:d8cbc61dbaa6 (inactive)
default                        0:19709c5a4e75 (inactive)
a branch name much longer than the default justification used by branches 7:10ff5895aa57
b                             12:2da6583810df (closed)
c                              6:589736a22561 (inactive)
a                              5:d8cbc61dbaa6 (inactive)
default                        0:19709c5a4e75 (inactive)
a branch name much longer than the default justification used by branches 7:10ff5895aa57
no open branch heads found on branches b
changeset:   12:2da6583810df
branch:      b
tag:         tip
parent:      8:eebb944467c9
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     close this part branch too

changeset:   11:c84627f3c15d
branch:      b
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     prune bad branch

reopening closed branch head 12
--- branch b is back in action
b                             13:6ac12926b8c3
a branch name much longer than the default justification used by branches 7:10ff5895aa57
---- test heads listings
changeset:   13:6ac12926b8c3
branch:      b
tag:         tip
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     reopen branch with a change

changeset:   7:10ff5895aa57
branch:      a branch name much longer than the default justification used by branches
user:        test
date:        Thu Jan 01 00:00:06 1970 +0000
summary:     Adding d branch

changeset:   6:589736a22561
branch:      c
user:        test
date:        Thu Jan 01 00:00:05 1970 +0000
summary:     Adding c branch

changeset:   5:d8cbc61dbaa6
branch:      a
parent:      2:881fe2b92ad0
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     Adding b branch head 2

changeset:   0:19709c5a4e75
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     Adding root node

% branch default
changeset:   0:19709c5a4e75
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     Adding root node

% branch a
changeset:   5:d8cbc61dbaa6
branch:      a
parent:      2:881fe2b92ad0
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     Adding b branch head 2

no open branch heads found on branches a
% branch b
changeset:   13:6ac12926b8c3
branch:      b
tag:         tip
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     reopen branch with a change

changeset:   13:6ac12926b8c3
branch:      b
tag:         tip
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     reopen branch with a change

changeset:   11:c84627f3c15d
branch:      b
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     prune bad branch