comparison mercurial/localrepo.py @ 41823:f6eff9e4de80

storage: introduce a `revlog.reuse-external-delta-parent` config

As pointed in c59987ab96b4, we had no simple way to get a client to not blindly
reuse the delta parent from a bundle. Instead one had to rely on a side effect
of the deprecated `format.generaldelta` configuration.

We introduce an explicit `revlog.reuse-external-delta-parent` configuration
option (default to True) to control this behavior. If the option is not set,
`format.generaldelta` still control this behavior.

To test the new option, we convert a couple of place where `generaldelta` have
been used for its side effects.

41822:169c386cc9d8

    deltabothparents = ui.configbool(b'storage',
                                     b'revlog.optimize-delta-parent-choice')
    options[b'deltabothparents'] = deltabothparents

    options[b'lazydeltabase'] = not scmutil.gddeltaconfig(ui)

    chainspan = ui.configbytes(b'experimental', b'maxdeltachainspan')
    if 0 <= chainspan:
        options[b'maxdeltachainspan'] = chainspan

41823:f6eff9e4de80

    deltabothparents = ui.configbool(b'storage',
                                     b'revlog.optimize-delta-parent-choice')
    options[b'deltabothparents'] = deltabothparents

    lazydeltabase = ui.configbool(b'storage',
                                  b'revlog.reuse-external-delta-parent')
    if lazydeltabase is None:
        lazydeltabase = not scmutil.gddeltaconfig(ui)
    options[b'lazydeltabase'] = lazydeltabase

    chainspan = ui.configbytes(b'experimental', b'maxdeltachainspan')
    if 0 <= chainspan:
        options[b'maxdeltachainspan'] = chainspan