Handle paginated registry metadata responses #8219
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In [4.1 List Package Releases](https://github.com/swiftlang/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md#41-list-package-releases) it is stated that a server may respond with a `Link` header that contains a pointer to a subsequent page of results. SPM is not checking for this link in the `Link` header and so if a registry returns paginated results only the first page of versions is searched when resolving. Respect the `next` link in the `Link` header by loading the next page of results and building up a list of versions, continuing until there is no `next` link present in the `Link` header of the last result. Issue: swiftlang#8215
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Motivation:
In 4.1 List Package Releases it is stated that a server may respond with a
Linkheader that contains a pointer to a subsequent page of results. SPM is not checking for thenextlink in theLinkheader and so if a registry returns paginated results, only the first page of versions is searched when resolving. This would result in a "version not found" error when in reality the version is present in a subsequent page of results.Modifications:
Respect the
nextlink in theLinkheader by loading the next page of results and building up a list of versions, continuing until there is nonextlink present in theLinkheader of the last result.Result:
Registry servers that serve paginated results now have all their results read.
Issue: #8215