obsolete: os.SEEK_END first appeared in Python 2.5 fixes 48c232873a54 failing for Python 2.4

tests: convert a push test to use revsets

outgoing: accept revset argument for --rev There may be a more generic way that would add revset support to more commands by adding revset support to addbranchrevs(), but given the proximity of the next code freeze, a minimal change seems like the better choice.

dirstate: drop assert

dirstate: eliminate redundant check parameter on _addpath() state == 'a' implies check I fail to see what the point of this check parameter is. Near as I can see, the only _addpath call where it was set to True was in add(), but there, state is 'a'. This is a follow-up to c2016bae3b97.

obsolete: add seek to end of file before calling tell (issue3543)

peer: remove cancopy from peer api; use directly on repo instead

peer: introduce canpush and improve error message

peer: introduce real peer classes This change separates peer implementations from the repository implementation. localpeer currently is a simple pass-through to localrepository, except for legacy calls, which have already been removed from localpeer. This ensures that the local client code only uses the most modern peer API when talking to local repos. Peers have a .local() method which returns either None or the underlying localrepository (or descendant thereof). Repos have a .peer() method to return a freshly constructed localpeer. The latter is used by hg.peer(), and also to allow folks to pass either a peer or a repo to some generic helper methods. We might want to get rid of .peer() eventually. The only user of locallegacypeer is debugdiscovery, which uses it to pose as a pre-setdiscovery client. But we decided to leave the old API defined in locallegacypeer for clarity and maybe for other uses in the future. It might be nice to actually define the peer API directly in peer.py as stub methods. One problem there is, however, that localpeer implements lock/addchangegroup, whereas the true remote peers implement unbundle. It might be desireable to get rid of this distinction eventually.

peer: introduce peer methods to prepare for peer classes This introduces a peer method into all repository classes, which currently simply returns self. It also changes hg.repository so it now raises an exception if the supplied paths does not resolve to a localrepo or descendant. Finally, all call sites are changed to use the peer and local methods as appropriate, where peer is used whenever the code is dealing with a remote repository (even if it's on local disk).