basectx: return a copied context if changeid is already a basectx
This implements a copy constructor so that we can pass a basectx-derived object
in future refactorings.
basectx: add an empty class that will be used as a parent of all contexts
At the moment, there is no simple way to check if an object is a context
because there is no common parent class. If there were, we could use
'isinstance' everywhere. Simply having memctx inherit from workingctx or
changectx would allow the use of 'isinstance' but that could lead to some
confusing situations of reading the code since we have three distinct concepts
of a context:
- changectx represents a changeset *already* in the repo, and is therefore immutable
- workingctx represents changes on disk in the working directory
- memctx represents changes solely in memory which may or may not be on disk
Therefore, I propose refactoring context.py to have all three contexts inherit
from a parent class 'basectx'.
ui.config: fix bug in config alternatives from
cc669e4fec95
proxy: allow wildcards in the no proxy list (
issue1821)
hgweb: cleaner if conditions in changelog() function
This removes unneeded extra nesting level and extra variable, which makes
the code easier to understand.