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[1.2] Avoid the deprecated JSON API #6549

Merged
merged 1 commit into from
Sep 17, 2022
Merged

[1.2] Avoid the deprecated JSON API #6549

merged 1 commit into from
Sep 17, 2022

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@poetry-bot poetry-bot bot commented Sep 17, 2022

Backport b61a4dd from #6081.

Resolves #6076

I've taken the JSON version of the simple API and converted it into a
`LinkSource` so that the package-finding logic in the `PyPiRepository`
is very similar to - but annoyingly not quite the same as! - the
`LegacyRepository`.

I've also taken the opportunity to refactor the `LegacyRepository` ever
so slightly to emphasise that similarity. I think I've probably fixed a
small bug re caching and pre-releases: previously the processing for
ignored pre-releases was skipped when reading from the cache.

I believe this change will tend to be a modest performance hit. Eg
consider a package like `cryptography`, for which there are maybe a
couple of dozen downloads available at each release: to get the
available versions we now have to iterate over each of those files and
parse their names, rather than simply reading the answer.

However if the API that poetry currently uses is truly deprecated I see
little choice but to suck that up - or risk being in an awkward spot
when it is turned off. cf #5970, but worse.

Most of the changes are in the test fixtures:
- unversioned fixtures were generated from the existing fixtures: I
didn't want to download fresh data and start getting different answers
than the tests were expecting
- new versioned fixtures were downloaded fresh

(cherry picked from commit b61a4dd)
@neersighted neersighted enabled auto-merge (rebase) September 17, 2022 17:32
@neersighted neersighted merged commit fa20185 into 1.2 Sep 17, 2022
@neersighted neersighted deleted the backport-6081-to-1.2 branch September 17, 2022 17:41
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