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

rev-branch-cache: properly ignores unaligned trailing data...

rev-branch-cache: properly ignores unaligned trailing data Previously, trailing data could lead to crash and would be written back to disk, disaligning all new data… This is no longer the cases. This was detected while playing with branchmap-v3 that access the rev-branch-cache much more aggressively.

Matt Harbison - - Load All Authors

File last commit:

r52756:f4733654 default


                r52868:76416b6e

default

Download file

             txnutil.py
        
                    33 lines
            
             | 978 B
            
                | text/x-python
            
             |
                PythonLexer
            
             / mercurial / txnutil.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      # txnutil.py - transaction related utilities

      #

      #  Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others

      #

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

      # GNU General Public License version 2 or any later version.

      from __future__ import annotations

      from . import encoding

      def mayhavepending(root):

          """return whether 'root' may have pending changes, which are

          visible to this process.

          """

          return root == encoding.environ.get(b'HG_PENDING')

      def trypending(root, vfs, filename, **kwargs):

          """Open  file to be read according to HG_PENDING environment variable

          This opens '.pending' of specified 'filename' only when HG_PENDING

          is equal to 'root'.

          This returns '(fp, is_pending_opened)' tuple.

          """

          if mayhavepending(root):

              try:

                  return (vfs(b'%s.pending' % filename, **kwargs), True)

              except FileNotFoundError:

                  pass

          return (vfs(filename, **kwargs), False)

	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

				# txnutil.py - transaction related utilities
				#
				# Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				from __future__ import annotations

				from . import encoding


				def mayhavepending(root):
				"""return whether 'root' may have pending changes, which are
				visible to this process.
				"""
				return root == encoding.environ.get(b'HG_PENDING')


				def trypending(root, vfs, filename, **kwargs):
				"""Open file to be read according to HG_PENDING environment variable

				This opens '.pending' of specified 'filename' only when HG_PENDING
				is equal to 'root'.

				This returns '(fp, is_pending_opened)' tuple.
				"""
				if mayhavepending(root):
				try:
				return (vfs(b'%s.pending' % filename, **kwargs), True)
				except FileNotFoundError:
				pass
				return (vfs(filename, **kwargs), False)