35 

    35 

    36 

    36 

    37 def preservedrequirements(repo):

    37 def preservedrequirements(repo):

    38     preserved = {

    38     preserved = {

    39         requirements.SHARED_REQUIREMENT,

    39         requirements.SHARED_REQUIREMENT,

    40     }

    41     }

    41     return preserved & repo.requirements

    42     return preserved & repo.requirements

    42 

    43 

    43 

    44 

    44 FORMAT_VARIANT = b'deficiency'

    45 FORMAT_VARIANT = b'deficiency'

  1002 

  1003 

  1003 

  1004 

  1004 def supporteddestrequirements(repo):

  1005 def supporteddestrequirements(repo):

  1005     """Obtain requirements that upgrade supports in the destination.

  1006     """Obtain requirements that upgrade supports in the destination.

  1006 

  1007 

  1008     the upgrade is disallowed.

  1009     the upgrade is disallowed.

  1009 

  1010 

  1010     Extensions should monkeypatch this to add their custom requirements.

  1011     Extensions should monkeypatch this to add their custom requirements.

  1011     """

  1012     """

  1012     supported = {

  1013     supported = {

  1022         requirements.REVLOGV2_REQUIREMENT,

  1023         requirements.REVLOGV2_REQUIREMENT,

  1023         requirements.SHARED_REQUIREMENT,

  1024         requirements.SHARED_REQUIREMENT,

  1024         requirements.SHARESAFE_REQUIREMENT,

  1025         requirements.SHARESAFE_REQUIREMENT,

  1025         requirements.SPARSEREVLOG_REQUIREMENT,

  1026         requirements.SPARSEREVLOG_REQUIREMENT,

  1026         requirements.STORE_REQUIREMENT,

  1027         requirements.STORE_REQUIREMENT,

  1027     }

  1029     }

  1028     for name in compression.compengines:

  1030     for name in compression.compengines:

  1029         engine = compression.compengines[name]

  1031         engine = compression.compengines[name]

  1030         if engine.available() and engine.revlogheader():

  1032         if engine.available() and engine.revlogheader():

  1031             supported.add(b'exp-compression-%s' % name)

  1033             supported.add(b'exp-compression-%s' % name)