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# __init__.py - fsmonitor initialization and overrides
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#
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# Copyright 2013-2016 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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'''Faster status operations with the Watchman file monitor (EXPERIMENTAL)
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Integrates the file-watching program Watchman with Mercurial to produce faster
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status results.
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On a particular Linux system, for a real-world repository with over 400,000
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files hosted on ext4, vanilla `hg status` takes 1.3 seconds. On the same
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system, with fsmonitor it takes about 0.3 seconds.
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fsmonitor requires no configuration -- it will tell Watchman about your
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repository as necessary. You'll need to install Watchman from
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https://facebook.github.io/watchman/ and make sure it is in your PATH.
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fsmonitor is incompatible with the largefiles and eol extensions, and
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will disable itself if any of those are active.
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The following configuration options exist:
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::
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[fsmonitor]
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mode = {off, on, paranoid}
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When `mode = off`, fsmonitor will disable itself (similar to not loading the
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extension at all). When `mode = on`, fsmonitor will be enabled (the default).
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When `mode = paranoid`, fsmonitor will query both Watchman and the filesystem,
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and ensure that the results are consistent.
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::
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[fsmonitor]
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timeout = (float)
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A value, in seconds, that determines how long fsmonitor will wait for Watchman
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to return results. Defaults to `2.0`.
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::
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[fsmonitor]
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blacklistusers = (list of userids)
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A list of usernames for which fsmonitor will disable itself altogether.
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::
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[fsmonitor]
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walk_on_invalidate = (boolean)
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Whether or not to walk the whole repo ourselves when our cached state has been
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invalidated, for example when Watchman has been restarted or .hgignore rules
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have been changed. Walking the repo in that case can result in competing for
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I/O with Watchman. For large repos it is recommended to set this value to
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false. You may wish to set this to true if you have a very fast filesystem
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that can outpace the IPC overhead of getting the result data for the full repo
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from Watchman. Defaults to false.
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::
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[fsmonitor]
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warn_when_unused = (boolean)
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Whether to print a warning during certain operations when fsmonitor would be
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beneficial to performance but isn't enabled.
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::
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[fsmonitor]
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warn_update_file_count = (integer)
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If ``warn_when_unused`` is set and fsmonitor isn't enabled, a warning will
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be printed during working directory updates if this many files will be
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created.
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'''
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# Platforms Supported
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# ===================
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#
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# **Linux:** *Stable*. Watchman and fsmonitor are both known to work reliably,
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# even under severe loads.
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#
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# **Mac OS X:** *Stable*. The Mercurial test suite passes with fsmonitor
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# turned on, on case-insensitive HFS+. There has been a reasonable amount of
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# user testing under normal loads.
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#
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# **Solaris, BSD:** *Alpha*. watchman and fsmonitor are believed to work, but
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# very little testing has been done.
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#
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# **Windows:** *Alpha*. Not in a release version of watchman or fsmonitor yet.
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#
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# Known Issues
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# ============
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#
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# * fsmonitor will disable itself if any of the following extensions are
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# enabled: largefiles, inotify, eol; or if the repository has subrepos.
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# * fsmonitor will produce incorrect results if nested repos that are not
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# subrepos exist. *Workaround*: add nested repo paths to your `.hgignore`.
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#
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# The issues related to nested repos and subrepos are probably not fundamental
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# ones. Patches to fix them are welcome.
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from __future__ import absolute_import
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import codecs
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import os
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import stat
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import sys
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import tempfile
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import weakref
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from mercurial.i18n import _
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from mercurial.node import hex
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from mercurial.pycompat import open
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from mercurial import (
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context,
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encoding,
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error,
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extensions,
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localrepo,
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merge,
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pathutil,
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pycompat,
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registrar,
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scmutil,
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util,
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)
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from mercurial import match as matchmod
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from mercurial.utils import (
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hashutil,
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stringutil,
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)
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from . import (
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pywatchman,
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state,
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watchmanclient,
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)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = b'ships-with-hg-core'
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configtable = {}
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configitem = registrar.configitem(configtable)
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configitem(
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b'fsmonitor', b'mode', default=b'on',
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)
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configitem(
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b'fsmonitor', b'walk_on_invalidate', default=False,
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)
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configitem(
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b'fsmonitor', b'timeout', default=b'2',
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)
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configitem(
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b'fsmonitor', b'blacklistusers', default=list,
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)
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configitem(
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b'fsmonitor', b'watchman_exe', default=b'watchman',
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)
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configitem(
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b'fsmonitor', b'verbose', default=True, experimental=True,
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)
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configitem(
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b'experimental', b'fsmonitor.transaction_notify', default=False,
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)
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# This extension is incompatible with the following blacklisted extensions
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# and will disable itself when encountering one of these:
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_blacklist = [b'largefiles', b'eol']
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def debuginstall(ui, fm):
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fm.write(
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b"fsmonitor-watchman",
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_(b"fsmonitor checking for watchman binary... (%s)\n"),
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ui.configpath(b"fsmonitor", b"watchman_exe"),
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)
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root = tempfile.mkdtemp()
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c = watchmanclient.client(ui, root)
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err = None
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try:
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v = c.command(b"version")
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fm.write(
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b"fsmonitor-watchman-version",
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_(b" watchman binary version %s\n"),
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pycompat.bytestr(v["version"]),
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)
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except watchmanclient.Unavailable as e:
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err = stringutil.forcebytestr(e)
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fm.condwrite(
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err,
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b"fsmonitor-watchman-error",
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_(b" watchman binary missing or broken: %s\n"),
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err,
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)
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return 1 if err else 0
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def _handleunavailable(ui, state, ex):
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"""Exception handler for Watchman interaction exceptions"""
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if isinstance(ex, watchmanclient.Unavailable):
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# experimental config: fsmonitor.verbose
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if ex.warn and ui.configbool(b'fsmonitor', b'verbose'):
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if b'illegal_fstypes' not in stringutil.forcebytestr(ex):
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ui.warn(stringutil.forcebytestr(ex) + b'\n')
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if ex.invalidate:
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state.invalidate()
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# experimental config: fsmonitor.verbose
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if ui.configbool(b'fsmonitor', b'verbose'):
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ui.log(
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b'fsmonitor',
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b'Watchman unavailable: %s\n',
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stringutil.forcebytestr(ex.msg),
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)
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else:
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ui.log(
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b'fsmonitor',
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b'Watchman exception: %s\n',
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stringutil.forcebytestr(ex),
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)
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def _hashignore(ignore):
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"""Calculate hash for ignore patterns and filenames
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If this information changes between Mercurial invocations, we can't
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rely on Watchman information anymore and have to re-scan the working
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copy.
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"""
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sha1 = hashutil.sha1()
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sha1.update(pycompat.byterepr(ignore))
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return pycompat.sysbytes(sha1.hexdigest())
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_watchmanencoding = pywatchman.encoding.get_local_encoding()
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_fsencoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
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_fixencoding = codecs.lookup(_watchmanencoding) != codecs.lookup(_fsencoding)
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def _watchmantofsencoding(path):
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"""Fix path to match watchman and local filesystem encoding
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watchman's paths encoding can differ from filesystem encoding. For example,
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on Windows, it's always utf-8.
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"""
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try:
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decoded = path.decode(_watchmanencoding)
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except UnicodeDecodeError as e:
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raise error.Abort(
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stringutil.forcebytestr(e), hint=b'watchman encoding error'
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)
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try:
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encoded = decoded.encode(_fsencoding, 'strict')
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except UnicodeEncodeError as e:
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raise error.Abort(stringutil.forcebytestr(e))
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return encoded
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def overridewalk(orig, self, match, subrepos, unknown, ignored, full=True):
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'''Replacement for dirstate.walk, hooking into Watchman.
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Whenever full is False, ignored is False, and the Watchman client is
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available, use Watchman combined with saved state to possibly return only a
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subset of files.'''
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def bail(reason):
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self._ui.debug(b'fsmonitor: fallback to core status, %s\n' % reason)
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return orig(match, subrepos, unknown, ignored, full=True)
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if full:
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return bail(b'full rewalk requested')
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if ignored:
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return bail(b'listing ignored files')
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if not self._watchmanclient.available():
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return bail(b'client unavailable')
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state = self._fsmonitorstate
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clock, ignorehash, notefiles = state.get()
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if not clock:
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if state.walk_on_invalidate:
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return bail(b'no clock')
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# Initial NULL clock value, see
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# https://facebook.github.io/watchman/docs/clockspec.html
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clock = b'c:0:0'
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notefiles = []
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ignore = self._ignore
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dirignore = self._dirignore
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if unknown:
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if _hashignore(ignore) != ignorehash and clock != b'c:0:0':
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# ignore list changed -- can't rely on Watchman state any more
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if state.walk_on_invalidate:
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return bail(b'ignore rules changed')
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notefiles = []
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clock = b'c:0:0'
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else:
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# always ignore
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ignore = util.always
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dirignore = util.always
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matchfn = match.matchfn
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matchalways = match.always()
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dmap = self._map
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if util.safehasattr(dmap, b'_map'):
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# for better performance, directly access the inner dirstate map if the
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# standard dirstate implementation is in use.
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dmap = dmap._map
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nonnormalset = self._map.nonnormalset
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copymap = self._map.copymap
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getkind = stat.S_IFMT
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dirkind = stat.S_IFDIR
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regkind = stat.S_IFREG
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lnkkind = stat.S_IFLNK
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join = self._join
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normcase = util.normcase
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fresh_instance = False
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exact = skipstep3 = False
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if match.isexact(): # match.exact
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exact = True
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dirignore = util.always # skip step 2
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elif match.prefix(): # match.match, no patterns
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skipstep3 = True
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if not exact and self._checkcase:
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# note that even though we could receive directory entries, we're only
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# interested in checking if a file with the same name exists. So only
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# normalize files if possible.
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normalize = self._normalizefile
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skipstep3 = False
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else:
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normalize = None
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# step 1: find all explicit files
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results, work, dirsnotfound = self._walkexplicit(match, subrepos)
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skipstep3 = skipstep3 and not (work or dirsnotfound)
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work = [d for d in work if not dirignore(d[0])]
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if not work and (exact or skipstep3):
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for s in subrepos:
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del results[s]
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del results[b'.hg']
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return results
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# step 2: query Watchman
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try:
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# Use the user-configured timeout for the query.
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# Add a little slack over the top of the user query to allow for
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# overheads while transferring the data
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self._watchmanclient.settimeout(state.timeout + 0.1)
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result = self._watchmanclient.command(
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b'query',
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{
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b'fields': [b'mode', b'mtime', b'size', b'exists', b'name'],
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b'since': clock,
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b'expression': [
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b'not',
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[
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b'anyof',
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[b'dirname', b'.hg'],
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[b'name', b'.hg', b'wholename'],
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],
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],
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b'sync_timeout': int(state.timeout * 1000),
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b'empty_on_fresh_instance': state.walk_on_invalidate,
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},
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)
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except Exception as ex:
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_handleunavailable(self._ui, state, ex)
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self._watchmanclient.clearconnection()
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return bail(b'exception during run')
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else:
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# We need to propagate the last observed clock up so that we
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# can use it for our next query
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state.setlastclock(pycompat.sysbytes(result[b'clock']))
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if result[b'is_fresh_instance']:
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if state.walk_on_invalidate:
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state.invalidate()
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return bail(b'fresh instance')
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fresh_instance = True
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# Ignore any prior noteable files from the state info
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notefiles = []
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# for file paths which require normalization and we encounter a case
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# collision, we store our own foldmap
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if normalize:
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foldmap = {normcase(k): k for k in results}
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switch_slashes = pycompat.ossep == b'\\'
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# The order of the results is, strictly speaking, undefined.
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# For case changes on a case insensitive filesystem we may receive
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# two entries, one with exists=True and another with exists=False.
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# The exists=True entries in the same response should be interpreted
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# as being happens-after the exists=False entries due to the way that
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# Watchman tracks files. We use this property to reconcile deletes
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# for name case changes.
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for entry in result[b'files']:
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fname = entry[b'name']
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# Watchman always give us a str. Normalize to bytes on Python 3
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# using Watchman's encoding, if needed.
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if not isinstance(fname, bytes):
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fname = fname.encode(_watchmanencoding)
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if _fixencoding:
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fname = _watchmantofsencoding(fname)
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if switch_slashes:
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fname = fname.replace(b'\\', b'/')
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if normalize:
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normed = normcase(fname)
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fname = normalize(fname, True, True)
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foldmap[normed] = fname
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fmode = entry[b'mode']
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fexists = entry[b'exists']
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kind = getkind(fmode)
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if b'/.hg/' in fname or fname.endswith(b'/.hg'):
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return bail(b'nested-repo-detected')
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if not fexists:
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# if marked as deleted and we don't already have a change
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# record, mark it as deleted. If we already have an entry
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# for fname then it was either part of walkexplicit or was
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# an earlier result that was a case change
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if (
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fname not in results
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and fname in dmap
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and (matchalways or matchfn(fname))
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):
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results[fname] = None
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elif kind == dirkind:
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if fname in dmap and (matchalways or matchfn(fname)):
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results[fname] = None
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elif kind == regkind or kind == lnkkind:
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if fname in dmap:
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if matchalways or matchfn(fname):
|
|
|
results[fname] = entry
|
|
|
elif (matchalways or matchfn(fname)) and not ignore(fname):
|
|
|
results[fname] = entry
|
|
|
elif fname in dmap and (matchalways or matchfn(fname)):
|
|
|
results[fname] = None
|
|
|
|
|
|
# step 3: query notable files we don't already know about
|
|
|
# XXX try not to iterate over the entire dmap
|
|
|
if normalize:
|
|
|
# any notable files that have changed case will already be handled
|
|
|
# above, so just check membership in the foldmap
|
|
|
notefiles = {
|
|
|
normalize(f, True, True)
|
|
|
for f in notefiles
|
|
|
if normcase(f) not in foldmap
|
|
|
}
|
|
|
visit = {
|
|
|
f
|
|
|
for f in notefiles
|
|
|
if (f not in results and matchfn(f) and (f in dmap or not ignore(f)))
|
|
|
}
|
|
|
|
|
|
if not fresh_instance:
|
|
|
if matchalways:
|
|
|
visit.update(f for f in nonnormalset if f not in results)
|
|
|
visit.update(f for f in copymap if f not in results)
|
|
|
else:
|
|
|
visit.update(
|
|
|
f for f in nonnormalset if f not in results and matchfn(f)
|
|
|
)
|
|
|
visit.update(f for f in copymap if f not in results and matchfn(f))
|
|
|
else:
|
|
|
if matchalways:
|
|
|
visit.update(
|
|
|
f for f, st in pycompat.iteritems(dmap) if f not in results
|
|
|
)
|
|
|
visit.update(f for f in copymap if f not in results)
|
|
|
else:
|
|
|
visit.update(
|
|
|
f
|
|
|
for f, st in pycompat.iteritems(dmap)
|
|
|
if f not in results and matchfn(f)
|
|
|
)
|
|
|
visit.update(f for f in copymap if f not in results and matchfn(f))
|
|
|
|
|
|
audit = pathutil.pathauditor(self._root, cached=True).check
|
|
|
auditpass = [f for f in visit if audit(f)]
|
|
|
auditpass.sort()
|
|
|
auditfail = visit.difference(auditpass)
|
|
|
for f in auditfail:
|
|
|
results[f] = None
|
|
|
|
|
|
nf = iter(auditpass)
|
|
|
for st in util.statfiles([join(f) for f in auditpass]):
|
|
|
f = next(nf)
|
|
|
if st or f in dmap:
|
|
|
results[f] = st
|
|
|
|
|
|
for s in subrepos:
|
|
|
del results[s]
|
|
|
del results[b'.hg']
|
|
|
return results
|
|
|
|
|
|
|
|
|
def overridestatus(
|
|
|
orig,
|
|
|
self,
|
|
|
node1=b'.',
|
|
|
node2=None,
|
|
|
match=None,
|
|
|
ignored=False,
|
|
|
clean=False,
|
|
|
unknown=False,
|
|
|
listsubrepos=False,
|
|
|
):
|
|
|
listignored = ignored
|
|
|
listclean = clean
|
|
|
listunknown = unknown
|
|
|
|
|
|
def _cmpsets(l1, l2):
|
|
|
try:
|
|
|
if b'FSMONITOR_LOG_FILE' in encoding.environ:
|
|
|
fn = encoding.environ[b'FSMONITOR_LOG_FILE']
|
|
|
f = open(fn, b'wb')
|
|
|
else:
|
|
|
fn = b'fsmonitorfail.log'
|
|
|
f = self.vfs.open(fn, b'wb')
|
|
|
except (IOError, OSError):
|
|
|
self.ui.warn(_(b'warning: unable to write to %s\n') % fn)
|
|
|
return
|
|
|
|
|
|
try:
|
|
|
for i, (s1, s2) in enumerate(zip(l1, l2)):
|
|
|
if set(s1) != set(s2):
|
|
|
f.write(b'sets at position %d are unequal\n' % i)
|
|
|
f.write(b'watchman returned: %s\n' % s1)
|
|
|
f.write(b'stat returned: %s\n' % s2)
|
|
|
finally:
|
|
|
f.close()
|
|
|
|
|
|
if isinstance(node1, context.changectx):
|
|
|
ctx1 = node1
|
|
|
else:
|
|
|
ctx1 = self[node1]
|
|
|
if isinstance(node2, context.changectx):
|
|
|
ctx2 = node2
|
|
|
else:
|
|
|
ctx2 = self[node2]
|
|
|
|
|
|
working = ctx2.rev() is None
|
|
|
parentworking = working and ctx1 == self[b'.']
|
|
|
match = match or matchmod.always()
|
|
|
|
|
|
# Maybe we can use this opportunity to update Watchman's state.
|
|
|
# Mercurial uses workingcommitctx and/or memctx to represent the part of
|
|
|
# the workingctx that is to be committed. So don't update the state in
|
|
|
# that case.
|
|
|
# HG_PENDING is set in the environment when the dirstate is being updated
|
|
|
# in the middle of a transaction; we must not update our state in that
|
|
|
# case, or we risk forgetting about changes in the working copy.
|
|
|
updatestate = (
|
|
|
parentworking
|
|
|
and match.always()
|
|
|
and not isinstance(ctx2, (context.workingcommitctx, context.memctx))
|
|
|
and b'HG_PENDING' not in encoding.environ
|
|
|
)
|
|
|
|
|
|
try:
|
|
|
if self._fsmonitorstate.walk_on_invalidate:
|
|
|
# Use a short timeout to query the current clock. If that
|
|
|
# takes too long then we assume that the service will be slow
|
|
|
# to answer our query.
|
|
|
# walk_on_invalidate indicates that we prefer to walk the
|
|
|
# tree ourselves because we can ignore portions that Watchman
|
|
|
# cannot and we tend to be faster in the warmer buffer cache
|
|
|
# cases.
|
|
|
self._watchmanclient.settimeout(0.1)
|
|
|
else:
|
|
|
# Give Watchman more time to potentially complete its walk
|
|
|
# and return the initial clock. In this mode we assume that
|
|
|
# the filesystem will be slower than parsing a potentially
|
|
|
# very large Watchman result set.
|
|
|
self._watchmanclient.settimeout(self._fsmonitorstate.timeout + 0.1)
|
|
|
startclock = self._watchmanclient.getcurrentclock()
|
|
|
except Exception as ex:
|
|
|
self._watchmanclient.clearconnection()
|
|
|
_handleunavailable(self.ui, self._fsmonitorstate, ex)
|
|
|
# boo, Watchman failed. bail
|
|
|
return orig(
|
|
|
node1,
|
|
|
node2,
|
|
|
match,
|
|
|
listignored,
|
|
|
listclean,
|
|
|
listunknown,
|
|
|
listsubrepos,
|
|
|
)
|
|
|
|
|
|
if updatestate:
|
|
|
# We need info about unknown files. This may make things slower the
|
|
|
# first time, but whatever.
|
|
|
stateunknown = True
|
|
|
else:
|
|
|
stateunknown = listunknown
|
|
|
|
|
|
if updatestate:
|
|
|
ps = poststatus(startclock)
|
|
|
self.addpostdsstatus(ps)
|
|
|
|
|
|
r = orig(
|
|
|
node1, node2, match, listignored, listclean, stateunknown, listsubrepos
|
|
|
)
|
|
|
modified, added, removed, deleted, unknown, ignored, clean = r
|
|
|
|
|
|
if not listunknown:
|
|
|
unknown = []
|
|
|
|
|
|
# don't do paranoid checks if we're not going to query Watchman anyway
|
|
|
full = listclean or match.traversedir is not None
|
|
|
if self._fsmonitorstate.mode == b'paranoid' and not full:
|
|
|
# run status again and fall back to the old walk this time
|
|
|
self.dirstate._fsmonitordisable = True
|
|
|
|
|
|
# shut the UI up
|
|
|
quiet = self.ui.quiet
|
|
|
self.ui.quiet = True
|
|
|
fout, ferr = self.ui.fout, self.ui.ferr
|
|
|
self.ui.fout = self.ui.ferr = open(os.devnull, b'wb')
|
|
|
|
|
|
try:
|
|
|
rv2 = orig(
|
|
|
node1,
|
|
|
node2,
|
|
|
match,
|
|
|
listignored,
|
|
|
listclean,
|
|
|
listunknown,
|
|
|
listsubrepos,
|
|
|
)
|
|
|
finally:
|
|
|
self.dirstate._fsmonitordisable = False
|
|
|
self.ui.quiet = quiet
|
|
|
self.ui.fout, self.ui.ferr = fout, ferr
|
|
|
|
|
|
# clean isn't tested since it's set to True above
|
|
|
with self.wlock():
|
|
|
_cmpsets(
|
|
|
[modified, added, removed, deleted, unknown, ignored, clean],
|
|
|
rv2,
|
|
|
)
|
|
|
modified, added, removed, deleted, unknown, ignored, clean = rv2
|
|
|
|
|
|
return scmutil.status(
|
|
|
modified, added, removed, deleted, unknown, ignored, clean
|
|
|
)
|
|
|
|
|
|
|
|
|
class poststatus(object):
|
|
|
def __init__(self, startclock):
|
|
|
self._startclock = startclock
|
|
|
|
|
|
def __call__(self, wctx, status):
|
|
|
clock = wctx.repo()._fsmonitorstate.getlastclock() or self._startclock
|
|
|
hashignore = _hashignore(wctx.repo().dirstate._ignore)
|
|
|
notefiles = (
|
|
|
status.modified
|
|
|
+ status.added
|
|
|
+ status.removed
|
|
|
+ status.deleted
|
|
|
+ status.unknown
|
|
|
)
|
|
|
wctx.repo()._fsmonitorstate.set(clock, hashignore, notefiles)
|
|
|
|
|
|
|
|
|
def makedirstate(repo, dirstate):
|
|
|
class fsmonitordirstate(dirstate.__class__):
|
|
|
def _fsmonitorinit(self, repo):
|
|
|
# _fsmonitordisable is used in paranoid mode
|
|
|
self._fsmonitordisable = False
|
|
|
self._fsmonitorstate = repo._fsmonitorstate
|
|
|
self._watchmanclient = repo._watchmanclient
|
|
|
self._repo = weakref.proxy(repo)
|
|
|
|
|
|
def walk(self, *args, **kwargs):
|
|
|
orig = super(fsmonitordirstate, self).walk
|
|
|
if self._fsmonitordisable:
|
|
|
return orig(*args, **kwargs)
|
|
|
return overridewalk(orig, self, *args, **kwargs)
|
|
|
|
|
|
def rebuild(self, *args, **kwargs):
|
|
|
self._fsmonitorstate.invalidate()
|
|
|
return super(fsmonitordirstate, self).rebuild(*args, **kwargs)
|
|
|
|
|
|
def invalidate(self, *args, **kwargs):
|
|
|
self._fsmonitorstate.invalidate()
|
|
|
return super(fsmonitordirstate, self).invalidate(*args, **kwargs)
|
|
|
|
|
|
dirstate.__class__ = fsmonitordirstate
|
|
|
dirstate._fsmonitorinit(repo)
|
|
|
|
|
|
|
|
|
def wrapdirstate(orig, self):
|
|
|
ds = orig(self)
|
|
|
# only override the dirstate when Watchman is available for the repo
|
|
|
if util.safehasattr(self, b'_fsmonitorstate'):
|
|
|
makedirstate(self, ds)
|
|
|
return ds
|
|
|
|
|
|
|
|
|
def extsetup(ui):
|
|
|
extensions.wrapfilecache(
|
|
|
localrepo.localrepository, b'dirstate', wrapdirstate
|
|
|
)
|
|
|
if pycompat.isdarwin:
|
|
|
# An assist for avoiding the dangling-symlink fsevents bug
|
|
|
extensions.wrapfunction(os, b'symlink', wrapsymlink)
|
|
|
|
|
|
extensions.wrapfunction(merge, b'update', wrapupdate)
|
|
|
|
|
|
|
|
|
def wrapsymlink(orig, source, link_name):
|
|
|
''' if we create a dangling symlink, also touch the parent dir
|
|
|
to encourage fsevents notifications to work more correctly '''
|
|
|
try:
|
|
|
return orig(source, link_name)
|
|
|
finally:
|
|
|
try:
|
|
|
os.utime(os.path.dirname(link_name), None)
|
|
|
except OSError:
|
|
|
pass
|
|
|
|
|
|
|
|
|
class state_update(object):
|
|
|
''' This context manager is responsible for dispatching the state-enter
|
|
|
and state-leave signals to the watchman service. The enter and leave
|
|
|
methods can be invoked manually (for scenarios where context manager
|
|
|
semantics are not possible). If parameters oldnode and newnode are None,
|
|
|
they will be populated based on current working copy in enter and
|
|
|
leave, respectively. Similarly, if the distance is none, it will be
|
|
|
calculated based on the oldnode and newnode in the leave method.'''
|
|
|
|
|
|
def __init__(
|
|
|
self,
|
|
|
repo,
|
|
|
name,
|
|
|
oldnode=None,
|
|
|
newnode=None,
|
|
|
distance=None,
|
|
|
partial=False,
|
|
|
):
|
|
|
self.repo = repo.unfiltered()
|
|
|
self.name = name
|
|
|
self.oldnode = oldnode
|
|
|
self.newnode = newnode
|
|
|
self.distance = distance
|
|
|
self.partial = partial
|
|
|
self._lock = None
|
|
|
self.need_leave = False
|
|
|
|
|
|
def __enter__(self):
|
|
|
self.enter()
|
|
|
|
|
|
def enter(self):
|
|
|
# Make sure we have a wlock prior to sending notifications to watchman.
|
|
|
# We don't want to race with other actors. In the update case,
|
|
|
# merge.update is going to take the wlock almost immediately. We are
|
|
|
# effectively extending the lock around several short sanity checks.
|
|
|
if self.oldnode is None:
|
|
|
self.oldnode = self.repo[b'.'].node()
|
|
|
|
|
|
if self.repo.currentwlock() is None:
|
|
|
if util.safehasattr(self.repo, b'wlocknostateupdate'):
|
|
|
self._lock = self.repo.wlocknostateupdate()
|
|
|
else:
|
|
|
self._lock = self.repo.wlock()
|
|
|
self.need_leave = self._state(b'state-enter', hex(self.oldnode))
|
|
|
return self
|
|
|
|
|
|
def __exit__(self, type_, value, tb):
|
|
|
abort = True if type_ else False
|
|
|
self.exit(abort=abort)
|
|
|
|
|
|
def exit(self, abort=False):
|
|
|
try:
|
|
|
if self.need_leave:
|
|
|
status = b'failed' if abort else b'ok'
|
|
|
if self.newnode is None:
|
|
|
self.newnode = self.repo[b'.'].node()
|
|
|
if self.distance is None:
|
|
|
self.distance = calcdistance(
|
|
|
self.repo, self.oldnode, self.newnode
|
|
|
)
|
|
|
self._state(b'state-leave', hex(self.newnode), status=status)
|
|
|
finally:
|
|
|
self.need_leave = False
|
|
|
if self._lock:
|
|
|
self._lock.release()
|
|
|
|
|
|
def _state(self, cmd, commithash, status=b'ok'):
|
|
|
if not util.safehasattr(self.repo, b'_watchmanclient'):
|
|
|
return False
|
|
|
try:
|
|
|
self.repo._watchmanclient.command(
|
|
|
cmd,
|
|
|
{
|
|
|
b'name': self.name,
|
|
|
b'metadata': {
|
|
|
# the target revision
|
|
|
b'rev': commithash,
|
|
|
# approximate number of commits between current and target
|
|
|
b'distance': self.distance if self.distance else 0,
|
|
|
# success/failure (only really meaningful for state-leave)
|
|
|
b'status': status,
|
|
|
# whether the working copy parent is changing
|
|
|
b'partial': self.partial,
|
|
|
},
|
|
|
},
|
|
|
)
|
|
|
return True
|
|
|
except Exception as e:
|
|
|
# Swallow any errors; fire and forget
|
|
|
self.repo.ui.log(
|
|
|
b'watchman', b'Exception %s while running %s\n', e, cmd
|
|
|
)
|
|
|
return False
|
|
|
|
|
|
|
|
|
# Estimate the distance between two nodes
|
|
|
def calcdistance(repo, oldnode, newnode):
|
|
|
anc = repo.changelog.ancestor(oldnode, newnode)
|
|
|
ancrev = repo[anc].rev()
|
|
|
distance = abs(repo[oldnode].rev() - ancrev) + abs(
|
|
|
repo[newnode].rev() - ancrev
|
|
|
)
|
|
|
return distance
|
|
|
|
|
|
|
|
|
# Bracket working copy updates with calls to the watchman state-enter
|
|
|
# and state-leave commands. This allows clients to perform more intelligent
|
|
|
# settling during bulk file change scenarios
|
|
|
# https://facebook.github.io/watchman/docs/cmd/subscribe.html#advanced-settling
|
|
|
def wrapupdate(
|
|
|
orig,
|
|
|
repo,
|
|
|
node,
|
|
|
branchmerge,
|
|
|
force,
|
|
|
ancestor=None,
|
|
|
mergeancestor=False,
|
|
|
labels=None,
|
|
|
matcher=None,
|
|
|
**kwargs
|
|
|
):
|
|
|
|
|
|
distance = 0
|
|
|
partial = True
|
|
|
oldnode = repo[b'.'].node()
|
|
|
newnode = repo[node].node()
|
|
|
if matcher is None or matcher.always():
|
|
|
partial = False
|
|
|
distance = calcdistance(repo.unfiltered(), oldnode, newnode)
|
|
|
|
|
|
with state_update(
|
|
|
repo,
|
|
|
name=b"hg.update",
|
|
|
oldnode=oldnode,
|
|
|
newnode=newnode,
|
|
|
distance=distance,
|
|
|
partial=partial,
|
|
|
):
|
|
|
return orig(
|
|
|
repo,
|
|
|
node,
|
|
|
branchmerge,
|
|
|
force,
|
|
|
ancestor,
|
|
|
mergeancestor,
|
|
|
labels,
|
|
|
matcher,
|
|
|
**kwargs
|
|
|
)
|
|
|
|
|
|
|
|
|
def repo_has_depth_one_nested_repo(repo):
|
|
|
for f in repo.wvfs.listdir():
|
|
|
if os.path.isdir(os.path.join(repo.root, f, b'.hg')):
|
|
|
msg = b'fsmonitor: sub-repository %r detected, fsmonitor disabled\n'
|
|
|
repo.ui.debug(msg % f)
|
|
|
return True
|
|
|
return False
|
|
|
|
|
|
|
|
|
def reposetup(ui, repo):
|
|
|
# We don't work with largefiles or inotify
|
|
|
exts = extensions.enabled()
|
|
|
for ext in _blacklist:
|
|
|
if ext in exts:
|
|
|
ui.warn(
|
|
|
_(
|
|
|
b'The fsmonitor extension is incompatible with the %s '
|
|
|
b'extension and has been disabled.\n'
|
|
|
)
|
|
|
% ext
|
|
|
)
|
|
|
return
|
|
|
|
|
|
if repo.local():
|
|
|
# We don't work with subrepos either.
|
|
|
#
|
|
|
# if repo[None].substate can cause a dirstate parse, which is too
|
|
|
# slow. Instead, look for a file called hgsubstate,
|
|
|
if repo.wvfs.exists(b'.hgsubstate') or repo.wvfs.exists(b'.hgsub'):
|
|
|
return
|
|
|
|
|
|
if repo_has_depth_one_nested_repo(repo):
|
|
|
return
|
|
|
|
|
|
fsmonitorstate = state.state(repo)
|
|
|
if fsmonitorstate.mode == b'off':
|
|
|
return
|
|
|
|
|
|
try:
|
|
|
client = watchmanclient.client(repo.ui, repo.root)
|
|
|
except Exception as ex:
|
|
|
_handleunavailable(ui, fsmonitorstate, ex)
|
|
|
return
|
|
|
|
|
|
repo._fsmonitorstate = fsmonitorstate
|
|
|
repo._watchmanclient = client
|
|
|
|
|
|
dirstate, cached = localrepo.isfilecached(repo, b'dirstate')
|
|
|
if cached:
|
|
|
# at this point since fsmonitorstate wasn't present,
|
|
|
# repo.dirstate is not a fsmonitordirstate
|
|
|
makedirstate(repo, dirstate)
|
|
|
|
|
|
class fsmonitorrepo(repo.__class__):
|
|
|
def status(self, *args, **kwargs):
|
|
|
orig = super(fsmonitorrepo, self).status
|
|
|
return overridestatus(orig, self, *args, **kwargs)
|
|
|
|
|
|
def wlocknostateupdate(self, *args, **kwargs):
|
|
|
return super(fsmonitorrepo, self).wlock(*args, **kwargs)
|
|
|
|
|
|
def wlock(self, *args, **kwargs):
|
|
|
l = super(fsmonitorrepo, self).wlock(*args, **kwargs)
|
|
|
if not ui.configbool(
|
|
|
b"experimental", b"fsmonitor.transaction_notify"
|
|
|
):
|
|
|
return l
|
|
|
if l.held != 1:
|
|
|
return l
|
|
|
origrelease = l.releasefn
|
|
|
|
|
|
def staterelease():
|
|
|
if origrelease:
|
|
|
origrelease()
|
|
|
if l.stateupdate:
|
|
|
l.stateupdate.exit()
|
|
|
l.stateupdate = None
|
|
|
|
|
|
try:
|
|
|
l.stateupdate = None
|
|
|
l.stateupdate = state_update(self, name=b"hg.transaction")
|
|
|
l.stateupdate.enter()
|
|
|
l.releasefn = staterelease
|
|
|
except Exception as e:
|
|
|
# Swallow any errors; fire and forget
|
|
|
self.ui.log(
|
|
|
b'watchman', b'Exception in state update %s\n', e
|
|
|
)
|
|
|
return l
|
|
|
|
|
|
repo.__class__ = fsmonitorrepo
|
|
|
|
