chg: declare environ (issue6812)

heptapod-ci: display python version it will be useful to debug in the CI

branching: merge stable into default

relnotes: add 6.4.2

Added signature for changeset f952be90b051

Added tag 6.4.2 for changeset f952be90b051

revlog-split: make sure the self._indexfile attribut is reset (issue6811) Before this change, after a transaction committing a file split, a revlog object would have its `self._indexfile` attribute desynchronised from the actual file storing the data. If that same object is reused (as we do for the manifest during clone bundles), this lead to the data being writting in the wrong location and the repository to go corrupt. We not properly reset the attribut when applicable and everything is back in working order.

revlog-split: also check a case where bundle contains multiple changegroup This case is not affected, we remains in the same transaction. However it seems important to improve the test coverage around these "features". It also helped to assert the scop of the critical bug.

revlog-split: show manifest data loss situation when using clonebundle After the commit of the transaction from applying the clone bundle, changes to the manifest from the subsequent pull would write index data in the wrong file. This lead to data being "lost" after the pull and the repository to be corrupted. We add a test checking this specific scenario. In practice, the issue only affects the manifest but we also test the issue with a file for future proofing things up. See test documentation and failure for details.

sha1dc: Make sure SHA1DC_BIGENDIAN is set on Darwin/PowerPC __BYTE_ORDER__ is not defined on old toolchains so sha1dc gets built in little endian mode on a big endian platform, hilarity ensues. Tested on Mac OS X Tiger 10.4.