--- a/hgext/chgserver.py Sat Feb 27 17:31:23 2016 +0100
+++ b/hgext/chgserver.py Fri Feb 26 14:59:39 2016 +0000
@@ -30,10 +30,12 @@
import SocketServer
import errno
+import inspect
import os
import re
import signal
import struct
+import sys
import threading
import time
import traceback
@@ -46,6 +48,7 @@
commandserver,
dispatch,
error,
+ extensions,
osutil,
util,
)
@@ -97,6 +100,50 @@
envhash = _hashlist(sorted(envitems))
return sectionhash[:6] + envhash[:6]
+def _getmtimepaths(ui):
+ """get a list of paths that should be checked to detect change
+
+ The list will include:
+ - extensions (will not cover all files for complex extensions)
+ - mercurial/__version__.py
+ - python binary
+ """
+ modules = [m for n, m in extensions.extensions(ui)]
+ try:
+ from mercurial import __version__
+ modules.append(__version__)
+ except ImportError:
+ pass
+ files = [sys.executable]
+ for m in modules:
+ try:
+ files.append(inspect.getabsfile(m))
+ except TypeError:
+ pass
+ return sorted(set(files))
+
+def _mtimehash(paths):
+ """return a quick hash for detecting file changes
+
+ mtimehash calls stat on given paths and calculate a hash based on size and
+ mtime of each file. mtimehash does not read file content because reading is
+ expensive. therefore it's not 100% reliable for detecting content changes.
+ it's possible to return different hashes for same file contents.
+ it's also possible to return a same hash for different file contents for
+ some carefully crafted situation.
+
+ for chgserver, it is designed that once mtimehash changes, the server is
+ considered outdated immediately and should no longer provide service.
+ """
+ def trystat(path):
+ try:
+ st = os.stat(path)
+ return (st.st_mtime, st.st_size)
+ except OSError:
+ # could be ENOENT, EPERM etc. not fatal in any case
+ pass
+ return _hashlist(map(trystat, paths))[:12]
+
# copied from hgext/pager.py:uisetup()
def _setuppagercmd(ui, options, cmd):
if not ui.formatted():