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Mirror conda packages - #593
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Mirroring a PyPI version passed each file's sha256 as the integrity GetOrFetchArtifactFromURLWithIntegrity records with the version. Wheels of one version share the name and version they are cached under, so the last file's checksum replaced the others', and serving the other wheels from the cache failed the integrity check. The mirror now passes the sha256 as a digest, which is checked against that file's content hash alone.
A conda version is mirrored with every build anaconda.org lists for it, each cached under the channel, name, version and subdir/filename the conda download handler reads from its path. The channel comes from the namespace or the channel qualifier; a package without one is refused, as retention keys without one are. The subdir, build and type qualifiers select builds. Which files a version has, which qualifiers select them and where the handler caches them is now described per ecosystem, so PyPI and conda share mirrorFiles. Part of git-pkgs#414.
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Part of #414. Builds on #592; the first commit is that PR.
A conda version is mirrored with every build anaconda.org lists for it. Each build is cached under the key
/conda/{channel}/{subdir}/{file}reads, so conda and pixi get it from the cache.pkg:conda/conda-forge/numpy@2.1.0) or thechannelqualifier. A package without one is refused, as retention keys without one are.subdir,buildandtypeselect builds, e.g.?subdir=linux-64&type=conda.upstream.condamirroring conda fails with a message saying so. The old message said "give a version", which doesn't help here.Which files a version has, which qualifiers select them and where the handler caches them is now described per ecosystem in
internal/mirror/files.go, so PyPI and conda sharemirrorFiles.Tested through the mirror and the conda handler with the upstream closed (
internal/server/mirror_conda_test.go). Against anaconda.org I mirroredpkg:conda/conda-forge/tomli@2.0.1andpkg:conda/zstandard@0.23.0?channel=conda-forge&subdir=osx-arm64(24 builds), then served both from the cache withupstream.condaunreachable; the sha256 matched anaconda.org's.