upstream/mercurial-mirror Files · hgext/narrow/narrowcopies.py

localrepo: automatically load lfs extension when required (BC)...

localrepo: automatically load lfs extension when required (BC) If an unrecognized requirement is present (possibly due to an unloaded extension), the user will get an error message telling them to go to https://mercurial-scm.org/wiki/MissingRequirement for more info. And some requirements clearly map to known extensions shipped by Mercurial. This commit teaches repository loading to automatically map requirements to extensions. We implement support for loading the lfs extension when the "lfs" requirement is present. This behavior feels more user-friendly to me and I'm having trouble coming up with a compelling reason to not do it. The strongest argument I have against is that - strictly speaking - requirements are general repository features and there could be N providers of that feature. e.g. in the case of LFS, there could be another extension implementing LFS support. And the user would want to use this non-official extension rather than the built-in one. The way this patch implements things, the non-official extension could be missing and Mercurial would load the official lfs extension, leading to unexpected behavior. But this feels like a highly marginal use case to me and doesn't outweigh the user benefit of "it just works." If someone really wanted to e.g. use a custom LFS extension, they could prevent the built-in one from being loaded by either defining "extensions.lfs=/path/to/custom/extension" or "extensions.lfs=!", as the automatic extension loading only occurs if there is no config entry for that extension. Differential Revision: https://phab.mercurial-scm.org/D4711

Martin von Zweigbergk - - Load All Authors

File last commit:

r36490:d0d5eef5 default


                r39888:2c2fadbc

default

Download file

             narrowcopies.py
        
                    34 lines
            
             | 1.1 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / hgext / narrow / narrowcopies.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      # narrowcopies.py - extensions to mercurial copies module to support narrow

      # clones

      #

      # Copyright 2017 Google, Inc.

      #

      # 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 absolute_import

      from mercurial import (

          copies,

          extensions,

      )

      def setup(repo):

          def _computeforwardmissing(orig, a, b, match=None):

              missing = orig(a, b, match)

              narrowmatch = repo.narrowmatch()

              if narrowmatch.always():

                  return missing

              missing = [f for f in missing if narrowmatch(f)]

              return missing

          def _checkcopies(orig, srcctx, dstctx, f, base, tca, remotebase, limit,

                           data):

              narrowmatch = repo.narrowmatch()

              if not narrowmatch(f):

                  return

              orig(srcctx, dstctx, f, base, tca, remotebase, limit, data)

          extensions.wrapfunction(copies, '_computeforwardmissing',

                                  _computeforwardmissing)

          extensions.wrapfunction(copies, '_checkcopies', _checkcopies)

	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

				# narrowcopies.py - extensions to mercurial copies module to support narrow
				# clones
				#
				# Copyright 2017 Google, Inc.
				#
				# 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 absolute_import

				from mercurial import (
				copies,
				extensions,
				)

				def setup(repo):
				def _computeforwardmissing(orig, a, b, match=None):
				missing = orig(a, b, match)
				narrowmatch = repo.narrowmatch()
				if narrowmatch.always():
				return missing
				missing = [f for f in missing if narrowmatch(f)]
				return missing

				def _checkcopies(orig, srcctx, dstctx, f, base, tca, remotebase, limit,
				data):
				narrowmatch = repo.narrowmatch()
				if not narrowmatch(f):
				return
				orig(srcctx, dstctx, f, base, tca, remotebase, limit, data)

				extensions.wrapfunction(copies, '_computeforwardmissing',
				_computeforwardmissing)
				extensions.wrapfunction(copies, '_checkcopies', _checkcopies)