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# server.py - common entry point for inotify status server
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#
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# Copyright 2009 Nicolas Dumazet <nicdumz@gmail.com>
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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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from mercurial.i18n import _
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from mercurial import cmdutil, posix, osutil, util
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import common
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import errno
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import os
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import socket
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import stat
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import struct
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import sys
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class AlreadyStartedException(Exception):
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pass
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class TimeoutException(Exception):
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pass
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def join(a, b):
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if a:
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if a[-1] == '/':
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return a + b
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return a + '/' + b
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return b
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def split(path):
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c = path.rfind('/')
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if c == -1:
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return '', path
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return path[:c], path[c + 1:]
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walk_ignored_errors = (errno.ENOENT, errno.ENAMETOOLONG)
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def walk(dirstate, absroot, root):
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'''Like os.walk, but only yields regular files.'''
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# This function is critical to performance during startup.
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def walkit(root, reporoot):
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files, dirs = [], []
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try:
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fullpath = join(absroot, root)
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for name, kind in osutil.listdir(fullpath):
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if kind == stat.S_IFDIR:
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if name == '.hg':
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if not reporoot:
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return
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else:
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dirs.append(name)
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path = join(root, name)
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if dirstate._ignore(path):
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continue
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for result in walkit(path, False):
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yield result
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elif kind in (stat.S_IFREG, stat.S_IFLNK):
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files.append(name)
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yield fullpath, dirs, files
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except OSError, err:
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if err.errno == errno.ENOTDIR:
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# fullpath was a directory, but has since been replaced
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# by a file.
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yield fullpath, dirs, files
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elif err.errno not in walk_ignored_errors:
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raise
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return walkit(root, root == '')
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class directory(object):
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"""
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Representing a directory
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* path is the relative path from repo root to this directory
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* files is a dict listing the files in this directory
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- keys are file names
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- values are file status
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* dirs is a dict listing the subdirectories
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- key are subdirectories names
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- values are directory objects
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"""
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def __init__(self, relpath=''):
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self.path = relpath
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self.files = {}
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self.dirs = {}
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def dir(self, relpath):
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"""
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Returns the directory contained at the relative path relpath.
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Creates the intermediate directories if necessary.
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"""
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if not relpath:
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return self
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l = relpath.split('/')
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ret = self
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while l:
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next = l.pop(0)
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try:
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ret = ret.dirs[next]
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except KeyError:
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d = directory(join(ret.path, next))
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ret.dirs[next] = d
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ret = d
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return ret
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def walk(self, states, visited=None):
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"""
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yield (filename, status) pairs for items in the trees
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that have status in states.
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filenames are relative to the repo root
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"""
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for file, st in self.files.iteritems():
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if st in states:
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yield join(self.path, file), st
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for dir in self.dirs.itervalues():
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if visited is not None:
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visited.add(dir.path)
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for e in dir.walk(states):
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yield e
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def lookup(self, states, path, visited):
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"""
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yield root-relative filenames that match path, and whose
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status are in states:
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* if path is a file, yield path
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* if path is a directory, yield directory files
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* if path is not tracked, yield nothing
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"""
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if path[-1] == '/':
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path = path[:-1]
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paths = path.split('/')
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# we need to check separately for last node
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last = paths.pop()
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tree = self
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try:
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for dir in paths:
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tree = tree.dirs[dir]
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except KeyError:
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# path is not tracked
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visited.add(tree.path)
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return
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try:
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# if path is a directory, walk it
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target = tree.dirs[last]
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visited.add(target.path)
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for file, st in target.walk(states, visited):
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yield file
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except KeyError:
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try:
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if tree.files[last] in states:
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# path is a file
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visited.add(tree.path)
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yield path
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except KeyError:
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# path is not tracked
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pass
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class repowatcher(object):
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"""
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Watches inotify events
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"""
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statuskeys = 'almr!?'
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def __init__(self, ui, dirstate, root):
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self.ui = ui
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self.dirstate = dirstate
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self.wprefix = join(root, '')
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self.prefixlen = len(self.wprefix)
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self.tree = directory()
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self.statcache = {}
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self.statustrees = dict([(s, directory()) for s in self.statuskeys])
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self.ds_info = self.dirstate_info()
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self.last_event = None
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def handle_timeout(self):
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pass
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def dirstate_info(self):
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try:
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st = os.lstat(self.wprefix + '.hg/dirstate')
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return st.st_mtime, st.st_ino
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except OSError, err:
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if err.errno != errno.ENOENT:
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raise
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return 0, 0
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def filestatus(self, fn, st):
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try:
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type_, mode, size, time = self.dirstate._map[fn][:4]
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except KeyError:
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type_ = '?'
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if type_ == 'n':
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st_mode, st_size, st_mtime = st
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if size == -1:
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return 'l'
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if size and (size != st_size or (mode ^ st_mode) & 0100):
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return 'm'
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if time != int(st_mtime):
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return 'l'
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return 'n'
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if type_ == '?' and self.dirstate._dirignore(fn):
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# we must check not only if the file is ignored, but if any part
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# of its path match an ignore pattern
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return 'i'
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return type_
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def updatefile(self, wfn, osstat):
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'''
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update the file entry of an existing file.
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osstat: (mode, size, time) tuple, as returned by os.lstat(wfn)
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'''
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self._updatestatus(wfn, self.filestatus(wfn, osstat))
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def deletefile(self, wfn, oldstatus):
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'''
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update the entry of a file which has been deleted.
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oldstatus: char in statuskeys, status of the file before deletion
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'''
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if oldstatus == 'r':
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newstatus = 'r'
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elif oldstatus in 'almn':
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newstatus = '!'
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else:
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newstatus = None
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self.statcache.pop(wfn, None)
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self._updatestatus(wfn, newstatus)
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def _updatestatus(self, wfn, newstatus):
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'''
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Update the stored status of a file.
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newstatus: - char in (statuskeys + 'ni'), new status to apply.
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- or None, to stop tracking wfn
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'''
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root, fn = split(wfn)
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d = self.tree.dir(root)
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oldstatus = d.files.get(fn)
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# oldstatus can be either:
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# - None : fn is new
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# - a char in statuskeys: fn is a (tracked) file
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if self.ui.debugflag and oldstatus != newstatus:
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self.ui.note(_('status: %r %s -> %s\n') %
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(wfn, oldstatus, newstatus))
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if oldstatus and oldstatus in self.statuskeys \
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and oldstatus != newstatus:
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del self.statustrees[oldstatus].dir(root).files[fn]
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if newstatus in (None, 'i'):
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d.files.pop(fn, None)
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elif oldstatus != newstatus:
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d.files[fn] = newstatus
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if newstatus != 'n':
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self.statustrees[newstatus].dir(root).files[fn] = newstatus
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def check_deleted(self, key):
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# Files that had been deleted but were present in the dirstate
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# may have vanished from the dirstate; we must clean them up.
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nuke = []
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for wfn, ignore in self.statustrees[key].walk(key):
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if wfn not in self.dirstate:
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nuke.append(wfn)
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for wfn in nuke:
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root, fn = split(wfn)
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del self.statustrees[key].dir(root).files[fn]
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del self.tree.dir(root).files[fn]
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def update_hgignore(self):
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# An update of the ignore file can potentially change the
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# states of all unknown and ignored files.
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# XXX If the user has other ignore files outside the repo, or
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# changes their list of ignore files at run time, we'll
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# potentially never see changes to them. We could get the
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# client to report to us what ignore data they're using.
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# But it's easier to do nothing than to open that can of
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# worms.
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if '_ignore' in self.dirstate.__dict__:
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delattr(self.dirstate, '_ignore')
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self.ui.note(_('rescanning due to .hgignore change\n'))
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self.handle_timeout()
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self.scan()
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def getstat(self, wpath):
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try:
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return self.statcache[wpath]
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except KeyError:
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try:
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return self.stat(wpath)
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except OSError, err:
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if err.errno != errno.ENOENT:
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raise
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def stat(self, wpath):
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try:
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st = os.lstat(join(self.wprefix, wpath))
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ret = st.st_mode, st.st_size, st.st_mtime
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self.statcache[wpath] = ret
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return ret
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except OSError:
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self.statcache.pop(wpath, None)
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raise
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class socketlistener(object):
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"""
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Listens for client queries on unix socket inotify.sock
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"""
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def __init__(self, ui, root, repowatcher, timeout):
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self.ui = ui
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self.repowatcher = repowatcher
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try:
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self.sock = posix.unixdomainserver(
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lambda p: os.path.join(root, '.hg', p),
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'inotify')
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except (OSError, socket.error), err:
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if err.args[0] == errno.EADDRINUSE:
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raise AlreadyStartedException(_('cannot start: '
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'socket is already bound'))
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raise
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self.fileno = self.sock.fileno
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def answer_stat_query(self, cs):
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names = cs.read().split('\0')
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states = names.pop()
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self.ui.note(_('answering query for %r\n') % states)
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visited = set()
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if not names:
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def genresult(states, tree):
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for fn, state in tree.walk(states):
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yield fn
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else:
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def genresult(states, tree):
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for fn in names:
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for f in tree.lookup(states, fn, visited):
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yield f
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return ['\0'.join(r) for r in [
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genresult('l', self.repowatcher.statustrees['l']),
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genresult('m', self.repowatcher.statustrees['m']),
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genresult('a', self.repowatcher.statustrees['a']),
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genresult('r', self.repowatcher.statustrees['r']),
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genresult('!', self.repowatcher.statustrees['!']),
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'?' in states
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and genresult('?', self.repowatcher.statustrees['?'])
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or [],
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[],
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'c' in states and genresult('n', self.repowatcher.tree) or [],
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visited
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]]
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def answer_dbug_query(self):
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return ['\0'.join(self.repowatcher.debug())]
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def accept_connection(self):
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sock, addr = self.sock.accept()
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cs = common.recvcs(sock)
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version = ord(cs.read(1))
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if version != common.version:
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self.ui.warn(_('received query from incompatible client '
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'version %d\n') % version)
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try:
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# try to send back our version to the client
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# this way, the client too is informed of the mismatch
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sock.sendall(chr(common.version))
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except socket.error:
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pass
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return
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type = cs.read(4)
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if type == 'STAT':
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results = self.answer_stat_query(cs)
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elif type == 'DBUG':
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results = self.answer_dbug_query()
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else:
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self.ui.warn(_('unrecognized query type: %s\n') % type)
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return
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try:
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try:
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v = chr(common.version)
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sock.sendall(v + type + struct.pack(common.resphdrfmts[type],
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*map(len, results)))
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sock.sendall(''.join(results))
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finally:
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sock.shutdown(socket.SHUT_WR)
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except socket.error, err:
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if err.args[0] != errno.EPIPE:
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raise
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if sys.platform.startswith('linux'):
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import linuxserver as _server
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else:
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raise ImportError
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master = _server.master
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def start(ui, dirstate, root, opts):
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timeout = opts.get('idle_timeout')
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if timeout:
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timeout = float(timeout) * 60000
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else:
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timeout = None
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class service(object):
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def init(self):
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try:
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self.master = master(ui, dirstate, root, timeout)
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except AlreadyStartedException, inst:
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raise util.Abort("inotify-server: %s" % inst)
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def run(self):
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try:
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try:
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self.master.run()
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except TimeoutException:
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pass
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finally:
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self.master.shutdown()
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if 'inserve' not in sys.argv:
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runargs = util.hgcmd() + ['inserve', '-R', root]
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else:
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runargs = util.hgcmd() + sys.argv[1:]
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pidfile = ui.config('inotify', 'pidfile')
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opts.setdefault('pid_file', '')
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if opts['daemon'] and pidfile is not None and not opts['pid_file']:
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opts['pid_file'] = pidfile
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service = service()
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logfile = ui.config('inotify', 'log')
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appendpid = ui.configbool('inotify', 'appendpid', False)
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ui.debug('starting inotify server: %s\n' % ' '.join(runargs))
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cmdutil.service(opts, initfn=service.init, runfn=service.run,
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logfile=logfile, runargs=runargs, appendpid=appendpid)
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