comparison mercurial/upgrade.py @ 32032:189778a06743

upgrade: register all format variants in a list

Now that all known format variants exists outside of the function, we can gather
them in a lists. This build a single entry point other code can use (current
target: extensions).

The repository upgrade code is updated to simply use entries from this list.

As a side effect this will also allow extensions to register their own format
variants, to do this "properly" we should introduce a "registrar" for this
category of object. However I prefer to keep this series simple, and that will
be adventure for future time.

32031:11a2461fc9b1

        return not self == other

    def __hash__(self):
        return hash(self.name)

class formatvariant(improvement):
    """an improvement subclass dedicated to repository format"""
    type = deficiency
    ### The following attributes should be defined for each class:

    @classmethod
    def fromconfig(cls, repo):
        assert cls._requirement is not None
        return cls._requirement in cls._newreporequirements(repo)

class fncache(requirementformatvariant):
    name = 'fncache'

    _requirement = 'fncache'

    upgrademessage = _('repository will be more resilient to storing '
                       'certain paths and performance of certain '
                       'operations should be improved')

class dotencode(requirementformatvariant):
    name = 'dotencode'

    _requirement = 'dotencode'

                    'space may not work correctly')

    upgrademessage = _('repository will be better able to store files '
                       'beginning with a space or period')

class generaldelta(requirementformatvariant):
    name = 'generaldelta'

    _requirement = 'generaldelta'

                       'interacting with other repositories using this '
                       'storage model should require less network and '
                       'CPU resources, making "hg push" and "hg pull" '
                       'faster')

class removecldeltachain(formatvariant):
    name = 'removecldeltachain'

    default = True

    # We could detect lack of revlogv1 and store here, but they were added
    # in 0.9.2 and we don't support upgrading repos without these
    # requirements, so let's not bother.

    if not fncache.fromrepo(repo):
        deficiencies.append(fncache)
    if not dotencode.fromrepo(repo):
        deficiencies.append(dotencode)
    if not generaldelta.fromrepo(repo):
        deficiencies.append(generaldelta)
    if not removecldeltachain.fromrepo(repo):
        deficiencies.append(removecldeltachain)

    return deficiencies

def findoptimizations(repo):
    """Determine optimisation that could be used during upgrade"""

32032:189778a06743

        return not self == other

    def __hash__(self):
        return hash(self.name)

allformatvariant = []

def registerformatvariant(cls):
    allformatvariant.append(cls)
    return cls

class formatvariant(improvement):
    """an improvement subclass dedicated to repository format"""
    type = deficiency
    ### The following attributes should be defined for each class:

    @classmethod
    def fromconfig(cls, repo):
        assert cls._requirement is not None
        return cls._requirement in cls._newreporequirements(repo)

@registerformatvariant
class fncache(requirementformatvariant):
    name = 'fncache'

    _requirement = 'fncache'

    upgrademessage = _('repository will be more resilient to storing '
                       'certain paths and performance of certain '
                       'operations should be improved')

@registerformatvariant
class dotencode(requirementformatvariant):
    name = 'dotencode'

    _requirement = 'dotencode'

                    'space may not work correctly')

    upgrademessage = _('repository will be better able to store files '
                       'beginning with a space or period')

@registerformatvariant
class generaldelta(requirementformatvariant):
    name = 'generaldelta'

    _requirement = 'generaldelta'

                       'interacting with other repositories using this '
                       'storage model should require less network and '
                       'CPU resources, making "hg push" and "hg pull" '
                       'faster')

@registerformatvariant
class removecldeltachain(formatvariant):
    name = 'removecldeltachain'

    default = True

    # We could detect lack of revlogv1 and store here, but they were added
    # in 0.9.2 and we don't support upgrading repos without these
    # requirements, so let's not bother.

    for fv in allformatvariant:
        if not fv.fromrepo(repo):
            deficiencies.append(fv)

    return deficiencies

def findoptimizations(repo):
    """Determine optimisation that could be used during upgrade"""