[darcs-devel] [issue1556] task: abandon tentative files and keep the information in memory

[Ben Franksen]

Ben Franksen <ben.franksen at online.de> added the comment:

Okay, if this is a preparation for branches, then I want to get things
right. I made a conceptual mistake when I proposed a
_darcs/branches/current file.

So a named branch is a file under _darcs/branches named like the branch.
We need exactly one branch to be active ("checked out" in git terms).
How do we represent that? A simple solution is to maintain a copy of the
active branch file as _darcs/active_branch. We could also store just the
branch name in _darcs/active_branch (akin to a symbolic link); but that
doesn't fit well with the idea of introducing branches step-by-step:
we'd have the conjure up a name for the single branch in a traditional
single-branch-repo. So, for the first step we don't actually need the
_darcs/branches directory, just a single file _darcs/active_branch or
perhaps just _darcs/active.

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