Johan Corveleyn wrote:
Julian Foad wrote:
We need to look at using the viewspec as input next. Semantically speaking,
these sorts of things:

* a way to check out a new WC to match the spec;
* a way to modify an existing WC to match the spec;
* a way to modify/checkout a WC of a *different* branch, to match the spec
except for its URLs (maybe switch URLs pointing inside this 'branch' or WC
get adjusted as if they are relative, and other switch URLs stay absolute?);

Ack.

FWIW, the viewspec format of svn-viewspec.py [1] (which can serve as
inspiration I guess) requires the viewspec to have a "Url", and then a
series of path rules. The Url serves as a base url, the path rules are
relative to that base url.

I implemented an output format compatible with 'svn-viewspec.py' in r1826990. Then I updated that output format to also support 'switched' and revisions, in r1826993. This version outputs a header declaring 'Format: 2', and svn-viewspec.py currently barfs on reading that.

Suggested exercises for the reader (you, plural):

* implement a UI to choose the output format (currently 'svn info --viewspec' is hard-coded to produce that 'format 2')

  * update 'svn-viewspec.py' to implement those 'format 2' extensions

  * start implementing the API functions that 'svn-viewspec.py' needs

* expose those API functions in the Python bindings and convert 'svn-viewspec.py' to use them

So here too, I suppose a viewspec can contain a "base url", but the
user should be able to override that base url when applying the
viewspec (with checkout, update, switch, export, ...).

Yes, this is true with either format.

- Julian


[1] 
http://svn.apache.org/repos/asf/subversion/trunk/tools/client-side/svn-viewspec.py

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