add general function to get tags

[vsoch]

this extends the updated get tags function (with pagination!) to use a general function, so a future caller can use the same functionality. I also use the original request base url as the base for the updated parameters and this assumes the Link returned is at the same url. If we hit cases where this isn't the case, we should use the url provided by the link and add back onto it the domain. I think for most of these pagination cases the base url won't change, so this is OK as a first shot.

Signed-off-by: vsoch [email protected]

[vsoch]

For linking, this should update oras-project#68.

And TIL instead of parsing the header we can just look at response.links and that seems to have the same structure! See https://stackoverflow.com/questions/32312758/python-requests-link-headers. @wolfv if you like this better we can use this approach instead. I guess I'm indifferent, they are sort of the same thing, but one shows how the sausage is made. 😆

[wolfv]

Thanks! I also made some adjustments to make the function even more generic :)