603     raw = repo.vfs.tryread(b'sparse')

   603     with repo.lock():

   604     oldincludes, oldexcludes, oldprofiles = parseconfig(repo.ui, raw, b'sparse')

   604         raw = repo.vfs.tryread(b'sparse')

   605 

   605         oldincludes, oldexcludes, oldprofiles = parseconfig(

   606     oldstatus = repo.status()

   606             repo.ui, raw, b'sparse'

   607     oldmatch = matcher(repo)

   607         )

   608     oldrequires = set(repo.requirements)

   608 

   609 

   609         oldstatus = repo.status()

   610     # TODO remove this try..except once the matcher integrates better

   610         oldmatch = matcher(repo)

   611     # with dirstate. We currently have to write the updated config

   611         oldrequires = set(repo.requirements)

   612     # because that will invalidate the matcher cache and force a

   612 

   613     # re-read. We ideally want to update the cached matcher on the

   613         # TODO remove this try..except once the matcher integrates better

   614     # repo instance then flush the new config to disk once wdir is

   614         # with dirstate. We currently have to write the updated config

   615     # updated. But this requires massive rework to matcher() and its

   615         # because that will invalidate the matcher cache and force a

   616     # consumers.

   616         # re-read. We ideally want to update the cached matcher on the

   617 

   617         # repo instance then flush the new config to disk once wdir is

   618     if requirements.SPARSE_REQUIREMENT in oldrequires and removing:

   618         # updated. But this requires massive rework to matcher() and its

   619         repo.requirements.discard(requirements.SPARSE_REQUIREMENT)

   619         # consumers.

   620         scmutil.writereporequirements(repo)

   620 

   621     elif requirements.SPARSE_REQUIREMENT not in oldrequires:

   621         if requirements.SPARSE_REQUIREMENT in oldrequires and removing:

   622         repo.requirements.add(requirements.SPARSE_REQUIREMENT)

   622             repo.requirements.discard(requirements.SPARSE_REQUIREMENT)

   623         scmutil.writereporequirements(repo)

   624 

   625     try:

   626         writeconfig(repo, includes, excludes, profiles)

   627         return refreshwdir(repo, oldstatus, oldmatch, force=force)

   628     except Exception:

   629         if repo.requirements != oldrequires:

   630             repo.requirements.clear()

   631             repo.requirements |= oldrequires

   633         writeconfig(repo, oldincludes, oldexcludes, oldprofiles)

   624         elif requirements.SPARSE_REQUIREMENT not in oldrequires:

   634         raise

   625             repo.requirements.add(requirements.SPARSE_REQUIREMENT)

   626             scmutil.writereporequirements(repo)

   627 

   628         try:

   629             writeconfig(repo, includes, excludes, profiles)

   630             return refreshwdir(repo, oldstatus, oldmatch, force=force)

   631         except Exception:

   632             if repo.requirements != oldrequires:

   633                 repo.requirements.clear()

   634                 repo.requirements |= oldrequires

   635                 scmutil.writereporequirements(repo)

   636             writeconfig(repo, oldincludes, oldexcludes, oldprofiles)

   637             raise