cache: introduce a changelogsourcebase class
This abstract class will help code that need a cache tracking the changelog
content (eg: the branchmap cache). The cache key used is the same as what the
branchmap uses.
This code was headed for core during the 4.3 cycle but never made it there. So
we starts with a copy in the evolve repository.
exclude contrib
recursive-exclude contrib *
exclude hgext3rd/evolve/hack
recursive-exclude hgext3rd/evolve/hack *
exclude hgext3rd/evolve/legacy.py
exclude Makefile
exclude tests/test-drop.t
exclude tests/test-inhibit.t
exclude tests/test-oldconvert.t
include COPYING
include docs/figures/hgview-example.png
include docs/makefile
include docs/*.py
include docs/README
include docs/*.rst
include docs/static/*.svg
include docs/tutorials/*.t
include hgext3rd/__init__.py
include hgext3rd/evolve/*.py
include hgext3rd/topic/*.py
include hgext3rd/topic/README
include MANIFEST.in
include README
include CHANGELOG
include setup.py
include tests/*.py
include tests/*.sh
include tests/testlib/*.sh
include tests/*.t
prune debian
recursive-include docs/figures *.svg