upstream/mercurial-mirror Files · mercurial/hg.py

fix race in localrepo.addchangegroup....

fix race in localrepo.addchangegroup. localrepo.addchangegroup writes to changelog, then manifest, then normal files. this breaks access ordering. if reader reads changelog while manifest is being written, can find pointers into places in manifest that are not yet written. same can happen for manifest and normal files. fix is to make almost no change to localrepo.addchangegroup. it must to write changelog and manifest data early because it has to read them while writing other files. instead, write changelog and manifest data to temp file that reader cannot see, then append temp data to manifest after all normal files written, finally append temp data to changelog. temp file code is in new appendfile module. can be used in other places with small changes. much smaller race still left. we write all new data in one write call, but reader can maybe see partial update because python or os or filesystem cannot always make write really atomic. file locking no help: slow, not portable, not reliable over nfs. only real safe other plan is write to temp file every time and rename, but performance bad when manifest or changelog is big.

Benoit Boissinot - - Load All Authors

File last commit:

r1945:dec6d3c1 default


                r1998:65cc17ae

default

Download file

             hg.py
        
                    36 lines
            
             | 1.3 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / mercurial / hg.py
          
                    History
                
                 |
                  Source
                 | Raw
                 |Copy content
                 |Copy permalink

        mpm@selenic.com
    
Add back links from file revisions to changeset revisions...

              r0
            
      # hg.py - repository classes for mercurial

      #

      # Copyright 2005 Matt Mackall <mpm@selenic.com>

      #

      # This software may be used and distributed according to the terms

      # of the GNU General Public License, incorporated herein by reference.

        mpm@selenic.com
    
Break apart hg.py...

              r1089
            
      from node import *

      from repo import *

        mpm@selenic.com
    
implement demand loading hack...

              r262
            
      from demandload import *

        Benoit Boissinot
    
new type of repo: bundle://path/to/repo+/path/to/bundlename...

              r1945
            
      demandload(globals(), "localrepo bundlerepo httprepo sshrepo statichttprepo")

        mpm@selenic.com
    
Add back links from file revisions to changeset revisions...

              r0
            
        mpm@selenic.com
    
Add hg:// protocol...

              r60
            
      def repository(ui, path=None, create=0):

        Matt Mackall
    
Change remote repository to httprepository

              r623
            
          if path:

              if path.startswith("http://"):

        mpm@selenic.com
    
Break apart hg.py...

              r1089
            
                  return httprepo.httprepository(ui, path)

        mpm@selenic.com
    
Add basic https support for pull

              r923
            
              if path.startswith("https://"):

        mpm@selenic.com
    
Break apart hg.py...

              r1089
            
                  return httprepo.httpsrepository(ui, path)

        Matt Mackall
    
Change remote repository to httprepository

              r623
            
              if path.startswith("hg://"):

        mpm@selenic.com
    
Break apart hg.py...

              r1089
            
                  return httprepo.httprepository(

                      ui, path.replace("hg://", "http://"))

        Matt Mackall
    
Change remote repository to httprepository

              r623
            
              if path.startswith("old-http://"):

        mpm@selenic.com
    
Separate out old-http support...

              r1101
            
                  return statichttprepo.statichttprepository(

                      ui, path.replace("old-http://", "http://"))

        Matt Mackall
    
Add an sshrepository class and hg serve --stdio

              r624
            
              if path.startswith("ssh://"):

        mpm@selenic.com
    
Break apart hg.py...

              r1089
            
                  return sshrepo.sshrepository(ui, path)

        Benoit Boissinot
    
new type of repo: bundle://path/to/repo+/path/to/bundlename...

              r1945
            
              if path.startswith("bundle://"):

                  path = path[9:]

                  s = path.split("+", 1)

                  if  len(s) == 1:

                      repopath, bundlename = "", s[0]

                  else:

                      repopath, bundlename = s

                  return bundlerepo.bundlerepository(ui, repopath, bundlename)

        mpm@selenic.com
    
Add hg:// protocol...

              r60
            
        mpm@selenic.com
    
localrepo: minor opener usage restructuring

              r1102
            
          return localrepo.localrepository(ui, path, create)

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

mpm@selenic.com Add back links from file revisions to changeset revisions...	r0	# hg.py - repository classes for mercurial
		#
		# Copyright 2005 Matt Mackall <mpm@selenic.com>
		#
		# This software may be used and distributed according to the terms
		# of the GNU General Public License, incorporated herein by reference.

mpm@selenic.com Break apart hg.py...	r1089	from node import *
		from repo import *
mpm@selenic.com implement demand loading hack...	r262	from demandload import *
Benoit Boissinot new type of repo: bundle://path/to/repo+/path/to/bundlename...	r1945	demandload(globals(), "localrepo bundlerepo httprepo sshrepo statichttprepo")
mpm@selenic.com Add back links from file revisions to changeset revisions...	r0
mpm@selenic.com Add hg:// protocol...	r60	def repository(ui, path=None, create=0):
Matt Mackall Change remote repository to httprepository	r623	if path:
		if path.startswith("http://"):
mpm@selenic.com Break apart hg.py...	r1089	return httprepo.httprepository(ui, path)
mpm@selenic.com Add basic https support for pull	r923	if path.startswith("https://"):
mpm@selenic.com Break apart hg.py...	r1089	return httprepo.httpsrepository(ui, path)
Matt Mackall Change remote repository to httprepository	r623	if path.startswith("hg://"):
mpm@selenic.com Break apart hg.py...	r1089	return httprepo.httprepository(
		ui, path.replace("hg://", "http://"))
Matt Mackall Change remote repository to httprepository	r623	if path.startswith("old-http://"):
mpm@selenic.com Separate out old-http support...	r1101	return statichttprepo.statichttprepository(
		ui, path.replace("old-http://", "http://"))
Matt Mackall Add an sshrepository class and hg serve --stdio	r624	if path.startswith("ssh://"):
mpm@selenic.com Break apart hg.py...	r1089	return sshrepo.sshrepository(ui, path)
Benoit Boissinot new type of repo: bundle://path/to/repo+/path/to/bundlename...	r1945	if path.startswith("bundle://"):
		path = path[9:]
		s = path.split("+", 1)
		if len(s) == 1:
		repopath, bundlename = "", s[0]
		else:
		repopath, bundlename = s
		return bundlerepo.bundlerepository(ui, repopath, bundlename)
mpm@selenic.com Add hg:// protocol...	r60
mpm@selenic.com localrepo: minor opener usage restructuring	r1102	return localrepo.localrepository(ui, path, create)