Mercurial > hg
view tests/hghave @ 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%.
author | Martin Geisler <mg@aragost.com> |
---|---|
date | Mon, 09 Aug 2010 15:31:56 +0200 |
parents | cbe400a8e217 |
children | b86c6954ec4c |
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#!/usr/bin/env python """Test the running system for features availability. Exit with zero if all features are there, non-zero otherwise. If a feature name is prefixed with "no-", the absence of feature is tested. """ import optparse import os import re import sys import tempfile tempprefix = 'hg-hghave-' def matchoutput(cmd, regexp, ignorestatus=False): """Return True if cmd executes successfully and its output is matched by the supplied regular expression. """ r = re.compile(regexp) fh = os.popen(cmd) s = fh.read() try: ret = fh.close() except IOError: # Happen in Windows test environment ret = 1 return (ignorestatus or ret is None) and r.search(s) def has_baz(): return matchoutput('baz --version 2>&1', r'baz Bazaar version') def has_bzr(): try: import bzrlib return bzrlib.__doc__ != None except ImportError: return False def has_bzr114(): try: import bzrlib return (bzrlib.__doc__ != None and bzrlib.version_info[:2] >= (1, 14)) except ImportError: return False def has_cvs(): re = r'Concurrent Versions System.*?server' return matchoutput('cvs --version 2>&1', re) def has_darcs(): return matchoutput('darcs --version', r'2\.[2-9]', True) def has_mtn(): return matchoutput('mtn --version', r'monotone', True) and not matchoutput( 'mtn --version', r'monotone 0\.(\d|[12]\d|3[01])[^\d]', True) def has_eol_in_paths(): try: fd, path = tempfile.mkstemp(prefix=tempprefix, suffix='\n\r') os.close(fd) os.remove(path) return True except: return False def has_executablebit(): fd, path = tempfile.mkstemp(prefix=tempprefix) os.close(fd) try: s = os.lstat(path).st_mode os.chmod(path, s | 0100) return (os.lstat(path).st_mode & 0100 != 0) finally: os.remove(path) def has_icasefs(): # Stolen from mercurial.util fd, path = tempfile.mkstemp(prefix=tempprefix, dir='.') os.close(fd) try: s1 = os.stat(path) d, b = os.path.split(path) p2 = os.path.join(d, b.upper()) if path == p2: p2 = os.path.join(d, b.lower()) try: s2 = os.stat(p2) return s2 == s1 except: return False finally: os.remove(path) def has_inotify(): try: import hgext.inotify.linux.watcher return True except ImportError: return False def has_fifo(): return hasattr(os, "mkfifo") def has_hotshot(): try: # hotshot.stats tests hotshot and many problematic dependencies # like profile. import hotshot.stats return True except ImportError: return False def has_lsprof(): try: import _lsprof return True except ImportError: return False def has_git(): return matchoutput('git --version 2>&1', r'^git version') def has_docutils(): try: from docutils.core import publish_cmdline return True except ImportError: return False def has_svn(): return matchoutput('svn --version 2>&1', r'^svn, version') and \ matchoutput('svnadmin --version 2>&1', r'^svnadmin, version') def has_svn_bindings(): try: import svn.core version = svn.core.SVN_VER_MAJOR, svn.core.SVN_VER_MINOR if version < (1, 4): return False return True except ImportError: return False def has_p4(): return matchoutput('p4 -V', r'Rev\. P4/') and matchoutput('p4d -V', r'Rev\. P4D/') def has_symlink(): return hasattr(os, "symlink") def has_tla(): return matchoutput('tla --version 2>&1', r'The GNU Arch Revision') def has_gpg(): return matchoutput('gpg --version 2>&1', r'GnuPG') def has_unix_permissions(): d = tempfile.mkdtemp(prefix=tempprefix, dir=".") try: fname = os.path.join(d, 'foo') for umask in (077, 007, 022): os.umask(umask) f = open(fname, 'w') f.close() mode = os.stat(fname).st_mode os.unlink(fname) if mode & 0777 != ~umask & 0666: return False return True finally: os.rmdir(d) def has_pygments(): try: import pygments return True except ImportError: return False def has_outer_repo(): return matchoutput('hg root 2>&1', r'') checks = { "baz": (has_baz, "GNU Arch baz client"), "bzr": (has_bzr, "Canonical's Bazaar client"), "bzr114": (has_bzr114, "Canonical's Bazaar client >= 1.14"), "cvs": (has_cvs, "cvs client/server"), "darcs": (has_darcs, "darcs client"), "eol-in-paths": (has_eol_in_paths, "end-of-lines in paths"), "execbit": (has_executablebit, "executable bit"), "fifo": (has_fifo, "named pipes"), "git": (has_git, "git command line client"), "gpg": (has_gpg, "gpg client"), "hotshot": (has_hotshot, "python hotshot module"), "icasefs": (has_icasefs, "case insensitive file system"), "inotify": (has_inotify, "inotify extension support"), "lsprof": (has_lsprof, "python lsprof module"), "mtn": (has_mtn, "monotone client (> 0.31)"), "outer-repo": (has_outer_repo, "outer repo"), "p4": (has_p4, "Perforce server and client"), "pygments": (has_pygments, "Pygments source highlighting library"), "docutils": (has_docutils, "Docutils text processing library"), "svn": (has_svn, "subversion client and admin tools"), "svn-bindings": (has_svn_bindings, "subversion python bindings"), "symlink": (has_symlink, "symbolic links"), "tla": (has_tla, "GNU Arch tla client"), "unix-permissions": (has_unix_permissions, "unix-style permissions"), } def list_features(): for name, feature in checks.iteritems(): desc = feature[1] print name + ':', desc def test_features(): failed = 0 for name, feature in checks.iteritems(): check, _ = feature try: check() except Exception, e: print "feature %s failed: %s" % (name, e) failed += 1 return failed parser = optparse.OptionParser("%prog [options] [features]") parser.add_option("--test-features", action="store_true", help="test available features") parser.add_option("--list-features", action="store_true", help="list available features") parser.add_option("-q", "--quiet", action="store_true", help="check features silently") if __name__ == '__main__': options, args = parser.parse_args() if options.list_features: list_features() sys.exit(0) if options.test_features: sys.exit(test_features()) quiet = options.quiet failures = 0 def error(msg): global failures if not quiet: sys.stderr.write(msg + '\n') failures += 1 for feature in args: negate = feature.startswith('no-') if negate: feature = feature[3:] if feature not in checks: error('skipped: unknown feature: ' + feature) continue check, desc = checks[feature] try: available = check() except Exception, e: error('hghave check failed: ' + feature) continue if not negate and not available: error('skipped: missing feature: ' + desc) elif negate and available: error('skipped: system supports %s' % desc) if failures != 0: sys.exit(1)