comparison mercurial/cmdutil.py @ 22370:45e02cfad4bd

revert: add a way for external extensions to prefetch file data

This allow extensions that mess with the storage layer (remotefilelog,
largefile) to prefetch any data that will be accessed during the revert
operation.

We are currently fetching more data than theoretically required because the
backup code is a bit stupid. Future patches will improve that.

22369:897041f6b025

            (dsremoved,  actions['undelete'], backup),
            (clean,      actions['noop'],     discard),
            (unknown,    actions['unknown'],  discard),
            )

        for abs, (rel, exact) in sorted(names.items()):
            # target file to be touch on disk (relative to cwd)
            target = repo.wjoin(abs)
            # search the entry in the dispatch table.
            # if the file is in any of these sets, it was touched in the working

                for sub in targetsubs:
                    ctx.sub(sub).revert(ui, ctx.substate[sub], *pats, **opts)
    finally:
        wlock.release()

def _performrevert(repo, parents, ctx, actions):
    """function that actually perform all the actions computed for revert

    This is an independent function to let extension to plug in and react to
    the imminent revert.

22370:45e02cfad4bd

            (dsremoved,  actions['undelete'], backup),
            (clean,      actions['noop'],     discard),
            (unknown,    actions['unknown'],  discard),
            )

        needdata = ('revert', 'add', 'remove', 'undelete')
        _revertprefetch(repo, ctx, *[actions[name][0] for name in needdata])

        for abs, (rel, exact) in sorted(names.items()):
            # target file to be touch on disk (relative to cwd)
            target = repo.wjoin(abs)
            # search the entry in the dispatch table.
            # if the file is in any of these sets, it was touched in the working

                for sub in targetsubs:
                    ctx.sub(sub).revert(ui, ctx.substate[sub], *pats, **opts)
    finally:
        wlock.release()

def _revertprefetch(repo, ctx, *files):
    """Let extension changing the storage layer prefetch content"""
    pass

def _performrevert(repo, parents, ctx, actions):
    """function that actually perform all the actions computed for revert

    This is an independent function to let extension to plug in and react to
    the imminent revert.