Naturally, I'm still missing my labels ;-)
What exactly should label support in vss2svn look like? Obviously, we
need to track labels internally to properly handle pinning to a label,
but should we also try to replicate labels in some sort of "tags"
directory?
Exactly, all labels should be in the "tags" directory. I think it would
be sufficient to give the user a choice on the command line, to which
directory we should add the labels.
My knowledge of labels in VSS isn't the greatest but I know that could
get messy real quick. For example, it's possible to create a label on
a directory, which is treated as recursive in VSS but is never
actually written to the physical files of the subitems. It's also
possible to label those individual items, and with the same label.
Labels are recursive for projects and local for files. Actually you have
three type of labels:
1.) project labels
2.) file labels
3.) file version labels
The first two are simply recorded as actions in the apropriate item, so
assigning a label is copying the revision of the item into the tags
directory. I don't know how subversion handles a recursive copy. But it
couldn't be that problematic. I think copy-from a directory is all we
need here.
I only have a few problems with the third type. Assigning a label to a
version will only record the label in the version record of the that
record. So you don't know, when this label was assigned, only that it
sticks to this version. I also don't know, how exactly this label
promotion feature of VSS works. I have to check that. So what will
happen, if we convert an item version, see that there is a label
attached to it, copy it to the tags directory and later we see, that the
same label was attached to one of the parent projects.
And then the next question, is it guaranteed, that all labels share the
same name space and that they must be unique within this space? What
will happen if you assin a label twice, and what will happen if the
database is broken and the label is assigend to two different versions.
But I don't expect as many problems as with all other actions. So there
could be a basic solution very soon (omitting the version labels)
Dirk
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