view tests/test-extension.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%.

uisetup called
reposetup called for a
ui == repo.ui
Foo
uisetup called
reposetup called for a
ui == repo.ui
reposetup called for b
ui == repo.ui
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
uisetup called
Bar
% module/__init__.py-style
uisetup called
reposetup called for a
ui == repo.ui
Foo
1) foo imported
1) bar imported
2) foo uisetup
2) bar uisetup
3) foo extsetup
3) bar extsetup
4) foo reposetup
4) bar reposetup
% hgweb.cgi
1) foo imported
1) bar imported
2) foo uisetup
2) bar uisetup
3) foo extsetup
3) bar extsetup
4) foo reposetup
4) bar reposetup
4) foo reposetup
4) bar reposetup
empty extension - empty cmdtable

no commands defined
% hg help
debugextension extension - only debugcommands

no commands defined
% hg help --verbose
debugextension extension - only debugcommands

list of commands:

 foo:
      yet another foo command

global options:
 -R --repository REPO    repository root directory or name of overlay bundle
                         file
    --cwd DIR            change working directory
 -y --noninteractive     do not prompt, assume 'yes' for any required answers
 -q --quiet              suppress output
 -v --verbose            enable additional output
    --config CONFIG [+]  set/override config option (use 'section.name=value')
    --debug              enable debugging output
    --debugger           start debugger
    --encoding ENCODE    set the charset encoding (default: ascii)
    --encodingmode MODE  set the charset encoding mode (default: strict)
    --traceback          always print a traceback on exception
    --time               time how long the command takes
    --profile            print command execution profile
    --version            output version information and exit
 -h --help               display help and exit

[+] marked option can be specified multiple times
% hg help --debug
debugextension extension - only debugcommands

list of commands:

 debugfoobar:
      yet another debug command
 foo:
      yet another foo command

global options:
 -R --repository REPO    repository root directory or name of overlay bundle
                         file
    --cwd DIR            change working directory
 -y --noninteractive     do not prompt, assume 'yes' for any required answers
 -q --quiet              suppress output
 -v --verbose            enable additional output
    --config CONFIG [+]  set/override config option (use 'section.name=value')
    --debug              enable debugging output
    --debugger           start debugger
    --encoding ENCODE    set the charset encoding (default: ascii)
    --encodingmode MODE  set the charset encoding mode (default: strict)
    --traceback          always print a traceback on exception
    --time               time how long the command takes
    --profile            print command execution profile
    --version            output version information and exit
 -h --help               display help and exit

[+] marked option can be specified multiple times
% issue811
% show extensions
debugissue811
mq
% disabled extension commands
'email' is provided by the following extension:

    patchbomb  command to send changesets as (a series of) patch emails

use "hg help extensions" for information on enabling extensions
hg: unknown command 'qdel'
'qdelete' is provided by the following extension:

    mq  manage a stack of patches

use "hg help extensions" for information on enabling extensions
hg: unknown command 'churn'
'churn' is provided by the following extension:

    churn  command to display statistics about repository history

use "hg help extensions" for information on enabling extensions
% disabled extensions
churn extension - command to display statistics about repository history

use "hg help extensions" for information on enabling extensions
patchbomb extension - command to send changesets as (a series of) patch emails

use "hg help extensions" for information on enabling extensions
% broken disabled extension and command
broken extension - (no help text available)

use "hg help extensions" for information on enabling extensions
hg: unknown command 'foo'