[email protected] writes:

> Stephen Leake <[email protected]> writes:
>
>> [email protected] writes:
>>
>>> Which backend are you using?
>>> hg, git, other?
>>
>> Part of the point of DVC is that the answer doesn't depend on the
>> backend.
>
> May be not:
> The OP ask for a diff (ediff) between current revision of a file against
> any other revision.
>
> It seem dvc-file-ediff make the diff between last changes in file (not
> commited yet) against last revision.

True.

> I know xhg is able to extract a file of a given revision.
> `xhg-revision-get-last-or-num-revision'
> With that, a diff is possible with any other file.
>
> So what is the similar  dvc command in other backends?

You can do dvc-log, then show the diff for any item in the list.

There is no generic "prompt for old revision", because some backends
don't have user friendly revision ids; monotone uses a 64 character
hash.

-- 
-- Stephe

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