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Krzysztof kuhy Rudnicki
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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
66 lines
2.5 KiB
Python
66 lines
2.5 KiB
Python
"""Maven repositories: newest stable of `group:artifact`, from maven-metadata.
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Four repositories, asked in order until one knows the artifact: Google
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Maven (every `androidx.*` and `com.android.*` artifact lives ONLY there),
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Maven Central, the Gradle plugin portal (plugin marker artifacts
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`<id>:<id>.gradle.plugin`) and JitPack (tag metadata for `com.github.*`
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artifacts published nowhere else). A 404 means "not here", not "not
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anywhere", so it moves on; anything else surfaces as `Offline` from the HTTP
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layer.
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`<latest>` and `<release>` in the metadata are not trusted: AndroidX writes
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`1.2.0-alpha03` into `<latest>` routinely. The full `<versions>` list goes
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through `newest_stable` like every other ecosystem. Only when NO repository
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has a stable release at all does the newest pre-release become the reference
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(`versions.reference`), which is how `androidx.biometric:biometric-ktx`,
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alpha-only since 2021, gets a checkable answer. Google's API clients
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(`v3-rev20260901-2.0.0`) are neither: for those the answer is the newest
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revision of every generation, and the judge picks the pin's own.
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"""
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from __future__ import annotations
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from xml.etree import ElementTree
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from dep_freshness._tables import MAVEN_REPOS
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from dep_freshness.registries.http import get_text
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from dep_freshness.versions import newest_per_generation, newest_stable, reference
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def metadata_url(repo: str, name: str) -> str | None:
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"""`.../group/path/artifact/maven-metadata.xml`, or None for a bad name."""
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group, sep, artifact = name.partition(":")
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if not sep or not group or not artifact:
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return None
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return f"{repo}{group.replace('.', '/')}/{artifact}/maven-metadata.xml"
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def versions_in(xml: str) -> list[str]:
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"""Every `<version>` in a maven-metadata document; [] when unparseable."""
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try:
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root = ElementTree.fromstring(xml)
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except ElementTree.ParseError:
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return []
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return [
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(node.text or "").strip()
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for node in root.iter("version")
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if node.text and node.text.strip()
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]
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def latest(name: str) -> str | None:
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seen: list[str] = []
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for repo in MAVEN_REPOS:
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url = metadata_url(repo, name)
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if url is None:
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return None
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body = get_text(url)
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if body is None:
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continue
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versions = versions_in(body)
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stable = newest_stable(versions)
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if stable is not None:
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return stable
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seen.extend(versions)
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return reference(seen) or newest_per_generation(seen)
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