changegroup: extract the file management part in its own function...
changegroup: extract the file management part in its own function
The current writebundle function do two things:
- taking a changegroup-packer instance and storing it into a valid bundle with
proper header.
- creating a temporary or requested file to store that bundle
We would like to make it easier to forward bundle stream directly from a remote
peer to a file, so we split the two logic to be able to skip the one about
building a valid bundle (the remote is already sending one).
