comparison mercurial/localrepo.py @ 48223:b4f83c9e7905

dirstate-v2: Add support when Rust is not enabled

This wires into `dirstatemap` the parser and serializer added in previous
changesets. The memory representation is still the same, with a flat `dict`
for `DirstateItem`s and another one for copy sources. Serialization always
creates a new dirstate-v2 data file and does not support (when Rust is not
enabled) appending to an existing one, since we don’t keep track of which
tree nodes are new or modified. Instead the tree is reconstructed during
serialization.

Differential Revision: https://phab.mercurial-scm.org/D11520

48222:7e78c72ee3ea

def gathersupportedrequirements(ui):
    """Determine the complete set of recognized requirements."""
    # Start with all requirements supported by this file.
    supported = set(localrepository._basesupported)

    if dirstate.SUPPORTS_DIRSTATE_V2:
        supported.add(requirementsmod.DIRSTATE_V2_REQUIREMENT)

    # Execute ``featuresetupfuncs`` entries if they belong to an extension
    # relevant to this ui instance.
    modules = {m.__name__ for n, m in extensions.extensions(ui)}

    for fn in featuresetupfuncs:

        requirementsmod.CHANGELOGV2_REQUIREMENT,
        requirementsmod.SPARSEREVLOG_REQUIREMENT,
        requirementsmod.NODEMAP_REQUIREMENT,
        bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT,
        requirementsmod.SHARESAFE_REQUIREMENT,
    }
    _basesupported = supportedformats | {
        requirementsmod.STORE_REQUIREMENT,
        requirementsmod.FNCACHE_REQUIREMENT,
        requirementsmod.SHARED_REQUIREMENT,

            requirements.add(requirementsmod.SPARSEREVLOG_REQUIREMENT)

    # experimental config: format.exp-dirstate-v2
    # Keep this logic in sync with `has_dirstate_v2()` in `tests/hghave.py`
    if ui.configbool(b'format', b'exp-dirstate-v2'):
        if dirstate.SUPPORTS_DIRSTATE_V2:
            requirements.add(requirementsmod.DIRSTATE_V2_REQUIREMENT)
        else:
            raise error.Abort(
                _(
                    b"dirstate v2 format requested by config "
                    b"but not supported (requires Rust extensions)"
                )
            )

    # experimental config: format.exp-use-copies-side-data-changeset
    if ui.configbool(b'format', b'exp-use-copies-side-data-changeset'):
        requirements.add(requirementsmod.CHANGELOGV2_REQUIREMENT)
        requirements.add(requirementsmod.COPIESSDC_REQUIREMENT)

48223:b4f83c9e7905

def gathersupportedrequirements(ui):
    """Determine the complete set of recognized requirements."""
    # Start with all requirements supported by this file.
    supported = set(localrepository._basesupported)

    # Execute ``featuresetupfuncs`` entries if they belong to an extension
    # relevant to this ui instance.
    modules = {m.__name__ for n, m in extensions.extensions(ui)}

    for fn in featuresetupfuncs:

        requirementsmod.CHANGELOGV2_REQUIREMENT,
        requirementsmod.SPARSEREVLOG_REQUIREMENT,
        requirementsmod.NODEMAP_REQUIREMENT,
        bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT,
        requirementsmod.SHARESAFE_REQUIREMENT,
        requirementsmod.DIRSTATE_V2_REQUIREMENT,
    }
    _basesupported = supportedformats | {
        requirementsmod.STORE_REQUIREMENT,
        requirementsmod.FNCACHE_REQUIREMENT,
        requirementsmod.SHARED_REQUIREMENT,

            requirements.add(requirementsmod.SPARSEREVLOG_REQUIREMENT)

    # experimental config: format.exp-dirstate-v2
    # Keep this logic in sync with `has_dirstate_v2()` in `tests/hghave.py`
    if ui.configbool(b'format', b'exp-dirstate-v2'):
        requirements.add(requirementsmod.DIRSTATE_V2_REQUIREMENT)

    # experimental config: format.exp-use-copies-side-data-changeset
    if ui.configbool(b'format', b'exp-use-copies-side-data-changeset'):
        requirements.add(requirementsmod.CHANGELOGV2_REQUIREMENT)
        requirements.add(requirementsmod.COPIESSDC_REQUIREMENT)