view tests/test-hg-parseurl.py.out @ 13760:ed97955e0c04

convert/mtn: add support for using monotone's "automate stdio" when available

Currently the convert extension spawns a new mtn process for each
operation. For a large repository, this ends up being hundreds of
thousands of processes. The following enables usage of monotone's
"automate stdio" functionality - documented at:

http://www.monotone.ca/docs/Automation.html#index-mtn-automate-stdio-188

The effect is that (after determining that a new enough mtn executable
is available) a single long-running mtn process is used for all the
operations, using stdin/stdout to send commands and read output.

This has a pretty significant effect on the performance of some parts
of the conversion process.

http://example.com/no/anchor, branches: (None, [])
http://example.com/an/anchor, branches: ('foo', [])
http://example.com/no/anchor/branches, branches: (None, ['foo'])
http://example.com/an/anchor/branches, branches: ('bar', ['foo'])
http://example.com/an/anchor/branches-None, branches: ('foo', [])