Ian Fijolek
1bd66e42de
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continuous-integration/drone/push Build is passing
Forgot walrus aren't supported in py37
740 lines
22 KiB
Python
Executable File
740 lines
22 KiB
Python
Executable File
#! /usr/bin/env python3
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from __future__ import annotations
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import argparse
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import logging
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import platform
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import tempfile
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from collections.abc import Sequence
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from dataclasses import dataclass
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from io import BytesIO
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from itertools import product
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from mimetypes import guess_type
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from pathlib import Path
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from subprocess import check_call
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from subprocess import check_output
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from tarfile import TarFile
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from tarfile import TarInfo
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from typing import Any
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from typing import NamedTuple
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from urllib.parse import urlparse
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from zipfile import ZipFile
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import requests
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__version__ = "3.0.2"
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logging.basicConfig(level=logging.WARNING)
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class UnsupportedContentTypeError(ValueError):
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pass
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class InvalidRemoteError(ValueError):
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pass
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def removeprefix(s: str, pre: str) -> str:
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# Duplicate str.removeprefix for py<3.9
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try:
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return s.removeprefix(pre) # type: ignore
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except AttributeError:
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# Py < 3.9
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return s[len(pre) :] if s and s.startswith(pre) else s
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def removesuffix(s: str, suf: str) -> str:
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# Duplicate str.removesuffix for py<3.9
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try:
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return s.removesuffix(suf) # type: ignore
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except AttributeError:
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# Py < 3.9
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return s[: -len(suf)] if s and s.endswith(suf) else s
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SYSTEM_SYNONYMS: list[list[str]] = [
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["Darwin", "darwin", "MacOS", "macos", "macOS"],
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["Windows", "windows", "win", "win32", "win64"],
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["Linux", "linux"],
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]
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ARCH_SYNONYMS: list[list[str]] = [
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["arm"],
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["x86_64", "amd64", "AMD64"],
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["arm64", "aarch64", "armv8b", "armv8l"],
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["x86", "i386", "i686"],
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]
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def get_synonyms(value: str, thesaurus: list[list[str]]) -> list[str]:
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"""Gets synonym list for a given value."""
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results = [value]
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for l in thesaurus:
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if value in l:
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results += l
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return results
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class MatchedValues(NamedTuple):
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version: str
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system: str
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arch: str
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@dataclass
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class GitRemoteInfo:
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"""Extracts information about a repository"""
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hostname: str
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owner: str
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repo: str
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def get_releases_url(self):
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"""Gets API url for releases based on hostname and repo info
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Currently only supporting Github and Gitea APIs"""
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if self.hostname == "github.com":
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return (
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f"https://api.{self.hostname}/repos/{self.owner}/{self.repo}/releases"
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)
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# Try to detect an api
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swagger_uri = f"https://{self.hostname}/swagger.v1.json"
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result = requests.get(swagger_uri)
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result.raise_for_status()
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swag = result.json()
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# Look for releases API
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gitea_releases_template = "/repos/{owner}/{repo}/releases"
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if gitea_releases_template in swag["paths"]:
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# TODO: Might be helpful to validate fields that are referenced in responses too
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return "".join(
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(
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"https://",
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self.hostname,
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swag["basePath"],
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gitea_releases_template.format(owner=self.owner, repo=self.repo),
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)
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)
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raise InvalidRemoteError(
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f"Could not find a valid API on host {self.hostname}. Only Github and Gitea APIs are supported"
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)
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def read_git_remote() -> str:
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"""Reads the git remote url from the origin"""
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return check_output(["git", "remote", "get-url", "origin"]).decode("UTF-8").strip()
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def parse_git_url(git_url: str) -> GitRemoteInfo:
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"""Extract Github repo info from a git remote url"""
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# Normalize Github ssh url as a proper URL
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if git_url.startswith("git@github.com:"):
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git_ssh_parts = git_url.partition(":")
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if not all(git_ssh_parts):
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raise InvalidRemoteError(
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f"Could not parse URL {git_url}. Is this an ssh url?"
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)
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git_url = f"ssh://{git_ssh_parts[0]}/{git_ssh_parts[2]}"
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u = urlparse(git_url)
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if not u.hostname:
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raise ValueError("Not an https url on origin")
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path = u.path.split("/")
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if len(path) < 3 or not all(path[1:3]):
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raise InvalidRemoteError(
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f"{path[1:3]} Could not parse owner and repo from URL {git_url}"
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)
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return GitRemoteInfo(u.hostname, path[1], removesuffix(path[2], ".git"))
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def parse_cargo_version(p: Path) -> str:
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"""Extracts cargo version from a Cargo.toml file"""
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with p.open() as f:
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for line in f:
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if line.startswith("version"):
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return line.partition(" = ")[2].strip()[1:-1]
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raise ValueError(f"No version found in {p}")
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def read_git_tag(fetch: bool = True) -> str | None:
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"""Get local git tag for current repo
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fetch: optionally fetch tags with depth of 1 from remote"""
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if fetch:
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check_call(["git", "fetch", "--tags", "--depth", "1"])
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git_tag = check_output(["git", "describe", "--tags"]).decode("UTF-8").strip()
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return git_tag or None
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def read_version(from_tags: bool = False, fetch: bool = False) -> str | None:
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"""Read version information from file or from git"""
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if from_tags:
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logging.debug("Reading version from git tag")
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return read_git_tag(fetch)
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matchers = {
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"Cargo.toml": parse_cargo_version,
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}
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for name, extractor in matchers.items():
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p = Path(name)
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if p.exists():
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logging.debug(f"Reading version from {p}")
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return extractor(p)
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logging.warning(
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"Unknown local project version. Didn't find any of %s", set(matchers.keys())
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)
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return None
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def fetch_release(
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remote: GitRemoteInfo,
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version: str | None = None,
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pre_release=False,
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) -> dict[Any, Any]:
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"""Fetches a release object from a Github repo
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If a version number is provided, that version will be retrieved. Otherwise, the latest
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will be returned.
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"""
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result = requests.get(
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remote.get_releases_url(),
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# headers={"Accept": "application/vnd.github.v3+json"},
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headers={"Accept": "application/json"},
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)
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result.raise_for_status()
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# Return the latest if requested
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if version is None or version == "latest":
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logging.debug("Looking for latest release")
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for release in result.json():
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if release["prerelease"] and not pre_release:
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continue
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return release
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# Return matching version
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for release in result.json():
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if release["tag_name"].endswith(version):
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logging.debug(f"Found release {release['name']} matching version {version}")
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return release
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raise ValueError(
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f"Could not find release version ending in {version}."
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f"{ ' Is it a pre-release?' if not pre_release else ''}"
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)
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def match_asset(
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release: dict[Any, Any],
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format: str,
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version: str | None = None,
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system_mapping: dict[str, str] | None = None,
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arch_mapping: dict[str, str] | None = None,
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) -> tuple[dict[Any, Any], MatchedValues]:
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"""Accepts a release and searches for an appropriate asset attached using
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a provided template and some alternative mappings for version, system, and machine info
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Args
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`release`: A dict release value from the Github API
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`format`: is a python format string allowing for "{version}", "{system}", and "{arch}"
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`version`: the version to use when matching, default will be the name of the release
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`system_mapping`: alternative values for results returned from `platform.system()`
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`arch_mapping`: alternative values for results returned from `platform.machine()`
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Note: Some fuzziness is built into the {version} template variable. We will try to match against
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the version as is, prefixed with a 'v' and have 'v' stripped from the beginning.
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Eg. An example from an arm64 Mac:
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match_asset({"name": "v1.0.0", ...}, `foo-{version}-{system}-{arch}.zip`)
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Matches against:
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* "foo-v1.0.0-Darwin-arm64.zip"
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* "foo-1.0.0-Darwin-arm64.zip"
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Now, instead of Darwin, maybe you want to use `macOS`. For that you'd provide a
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`system_mapping`.
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match_asset({"name": "v1.0.0", ...}, `foo-{version}-{system}-{arch}.zip, system_mapping={"Darwin": "macOS"})
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Matches against:
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* "foo-v1.0.0-macOS-arm64.zip"
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* "foo-1.0.0-macOS-arm64.zip"
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"""
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if version is None:
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version = release["tag_name"]
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# This should never really happen
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if version is None:
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raise ValueError("No version provided or found in release name.")
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system = platform.system()
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if system_mapping:
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systems = [system_mapping.get(system, system)]
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else:
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systems = get_synonyms(system, SYSTEM_SYNONYMS)
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arch = platform.machine()
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if arch_mapping:
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archs = [arch_mapping.get(arch, arch)]
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else:
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archs = get_synonyms(arch, ARCH_SYNONYMS)
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expected_names = {
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format.format(
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version=version_opt,
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system=system_opt,
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arch=arch_opt,
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): MatchedValues(version=version_opt, system=system_opt, arch=arch_opt)
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for version_opt, system_opt, arch_opt in product(
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(
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version.lstrip("v"),
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"v" + version if not version.startswith("v") else version,
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),
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systems,
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archs,
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)
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}
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for asset in release["assets"]:
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if asset["name"] in expected_names:
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return (asset, expected_names[asset["name"]])
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raise ValueError(
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f"Could not find asset named {expected_names} on release {release['name']}"
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)
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class PackageAdapter:
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"""Adapts the names and extractall methods from ZipFile and TarFile classes"""
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def __init__(self, content_type: str, response: requests.Response):
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self._package: TarFile | ZipFile
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if content_type in (
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"application/zip",
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"application/x-zip-compressed",
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):
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logging.debug("Opening zip file from response content")
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self._package = ZipFile(BytesIO(response.content))
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elif content_type == "application/x-tar":
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logging.debug("Opening tar file from response content")
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self._package = TarFile(fileobj=response.raw)
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elif content_type in (
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"application/gzip",
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"application/x-tar+gzip",
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"application/x-tar+xz",
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"application/x-compressed-tar",
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):
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logging.debug("Opening compressed tar file from response content")
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self._package = TarFile.open(fileobj=BytesIO(response.content), mode="r:*")
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else:
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raise UnsupportedContentTypeError(
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f"Unknown or unsupported content type {content_type}"
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)
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def get_names(self) -> list[str]:
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"""Get list of all file names in package"""
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if isinstance(self._package, ZipFile):
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return self._package.namelist()
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if isinstance(self._package, TarFile):
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return self._package.getnames()
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raise ValueError(
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f"Unknown package type, cannot extract from {type(self._package)}"
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)
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def extractall(
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self,
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path: Path | None,
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members: list[str] | None,
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) -> list[str]:
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"""Extract all or a subset of files from the package
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If the `file_names` list is empty, all files will be extracted"""
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if path is None:
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path = Path.cwd()
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if not members:
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logging.debug("Extracting all members to %s", path)
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self._package.extractall(path=path)
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return self.get_names()
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# TODO: Use walrus operator when dropping 3.7 support
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missing_members = set(members) - set(self.get_names())
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if missing_members:
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raise ValueError(f"Missing members: {missing_members}")
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logging.debug("Extracting members %s to %s", members, path)
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if isinstance(self._package, ZipFile):
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self._package.extractall(path=path, members=members)
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if isinstance(self._package, TarFile):
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self._package.extractall(
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path=path, members=(self._package.getmember(name) for name in members)
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)
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return members
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def get_asset_package(
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asset: dict[str, Any], result: requests.Response
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) -> PackageAdapter:
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possible_content_types = (
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asset.get("content_type"),
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"+".join(t for t in guess_type(asset["name"]) if t is not None),
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)
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for content_type in possible_content_types:
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if not content_type:
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continue
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try:
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return PackageAdapter(content_type, result)
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except UnsupportedContentTypeError:
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continue
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else:
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raise UnsupportedContentTypeError(
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f"Cannot extract files from archive because we don't recognize the content types {possible_content_types}"
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)
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def download_asset(
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asset: dict[Any, Any],
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extract_files: list[str] | None = None,
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destination: Path | None = None,
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) -> list[Path]:
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"""Download asset from entity passed in
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Extracts files from archives if provided. Any empty list will extract all files
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Args
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`asset`: asset dictionary as returned from API
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`extract_files`: optional list of file paths to extract. An empty list will extract all
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`destination`: destination directory to put the downloaded assset
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Returns
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list of Path objects containing all extracted files
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"""
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if destination is None:
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destination = Path.cwd()
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result = requests.get(asset["browser_download_url"])
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if extract_files is not None:
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logging.info("Extracting package %s", asset["name"])
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package = get_asset_package(asset, result)
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extract_files = package.extractall(path=destination, members=extract_files)
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return [destination / name for name in extract_files]
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file_name = destination / asset["name"]
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with open(file_name, "wb") as f:
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f.write(result.content)
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return [file_name]
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class MapAddAction(argparse.Action):
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def __call__(
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self,
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_: argparse.ArgumentParser,
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namespace: argparse.Namespace,
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values: str | Sequence[Any] | None,
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option_string: str | None = None,
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):
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# Validate that required value has something
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if self.required and not values:
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raise argparse.ArgumentError(
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self, f"Did not provide required argument {option_string}"
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)
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# Get and initialize the destination
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dest = getattr(namespace, self.dest)
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if dest is None:
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dest = {}
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# Parse values
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if values is not None:
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if isinstance(values, str):
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values = (values,)
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for value in values:
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if "=" not in value:
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raise argparse.ArgumentError(
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self,
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f"Value needs to be in the form `key=value` and received {value}",
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)
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parts = value.partition("=")
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dest[parts[0]] = parts[2]
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# Set dest value
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setattr(namespace, self.dest, dest)
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def _parse_args(args: list[str] | None = None) -> argparse.Namespace:
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logging.debug("Parsing arguments: %s", args)
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"format",
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help="Format template to match assets. Eg. `foo-{version}-{system}-{arch}.zip`",
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)
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parser.add_argument(
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"destination",
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metavar="DEST",
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nargs="?",
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type=Path,
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default=Path.cwd(),
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help="Destination directory. Defaults to current directory",
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)
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parser.add_argument(
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"-v", action="count", help="verbose or debug logging", default=0
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)
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parser.add_argument(
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"--hostname",
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help="Git repository hostname",
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)
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parser.add_argument(
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"--owner",
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help="Owner of the repo. If not provided, it will be retrieved from the git url",
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)
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parser.add_argument(
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"--repo",
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help="Repo name. If not provided, it will be retrieved from the git url",
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)
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parser.add_argument(
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"--git-url",
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help="Git repository URL. Overrides `git remote` detection, but not command line options for hostname, owner, and repo",
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)
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parser.add_argument(
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"--version",
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help="Release version to download. If not provided, it will look for project metadata",
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)
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parser.add_argument(
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"--prerelease",
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action="store_true",
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help="Include pre-release versions in search",
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)
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parser.add_argument(
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"--version-git-tag",
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"-t",
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action="store_true",
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help="Get the release version from a git tag",
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)
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parser.add_argument(
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"--version-git-no-fetch",
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action="store_true",
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help="Shallow fetch tags prior to checking versions",
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)
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parser.add_argument(
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"--map-system",
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"-s",
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action=MapAddAction,
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help="Map a platform.system() value to a custom value",
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)
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|
parser.add_argument(
|
|
"--map-arch",
|
|
"-a",
|
|
action=MapAddAction,
|
|
help="Map a platform.machine() value to a custom value",
|
|
)
|
|
parser.add_argument(
|
|
"--exec",
|
|
"-c",
|
|
help="Shell commands to execute after download or extraction. {} will be expanded to the downloaded asset name.",
|
|
)
|
|
parser.add_argument(
|
|
"--extract-files",
|
|
"-e",
|
|
action="append",
|
|
help="A list of file names to extract from the downloaded archive",
|
|
)
|
|
parser.add_argument(
|
|
"--extract-all",
|
|
"-x",
|
|
action="store_true",
|
|
help="Extract all files from the downloaded archive",
|
|
)
|
|
parser.add_argument(
|
|
"--url-only",
|
|
action="store_true",
|
|
help="Only print the URL and do not download",
|
|
)
|
|
parser.add_argument(
|
|
"--use-temp-dir",
|
|
action="store_true",
|
|
help="Use a temporary directory as the destination",
|
|
)
|
|
|
|
parsed_args = parser.parse_args(args)
|
|
|
|
# Merge in fields from args and git remote
|
|
if not all((parsed_args.owner, parsed_args.repo, parsed_args.hostname)):
|
|
# Check to see if a git url was provided. If not, we use local directory git remote
|
|
if parsed_args.git_url is None:
|
|
parsed_args.git_url = read_git_remote()
|
|
|
|
# If using a local repo, try to determine version from project files
|
|
if parsed_args.version is None:
|
|
parsed_args.version = read_version(
|
|
parsed_args.version_git_tag,
|
|
not parsed_args.version_git_no_fetch,
|
|
)
|
|
|
|
# Get parts from git url
|
|
remote_info = parse_git_url(parsed_args.git_url)
|
|
|
|
def merge_field(a, b, field):
|
|
value = getattr(a, field)
|
|
if value is None:
|
|
setattr(a, field, getattr(b, field))
|
|
|
|
for field in ("owner", "repo", "hostname"):
|
|
merge_field(parsed_args, remote_info, field)
|
|
|
|
if parsed_args.extract_all:
|
|
parsed_args.extract_files = []
|
|
|
|
if parsed_args.use_temp_dir:
|
|
parsed_args.destination = Path(tempfile.mkdtemp())
|
|
|
|
return parsed_args
|
|
|
|
|
|
def download_release(
|
|
remote_info: GitRemoteInfo,
|
|
destination: Path,
|
|
format: str,
|
|
version: str | None = None,
|
|
system_mapping: dict[str, str] | None = None,
|
|
arch_mapping: dict[str, str] | None = None,
|
|
extract_files: list[str] | None = None,
|
|
pre_release=False,
|
|
exec: str | None = None,
|
|
) -> list[Path]:
|
|
"""Convenience method for fetching, downloading, and extracting a release
|
|
|
|
This is slightly different than running off the commandline, it will execute the shell script
|
|
from the destination directory, not the current working directory.
|
|
"""
|
|
release = fetch_release(
|
|
remote_info,
|
|
version=version,
|
|
pre_release=pre_release,
|
|
)
|
|
asset, matched_values = match_asset(
|
|
release,
|
|
format,
|
|
version=version,
|
|
system_mapping=system_mapping,
|
|
arch_mapping=arch_mapping,
|
|
)
|
|
|
|
format_fields = dict(
|
|
asset_name=asset["name"],
|
|
**matched_values._asdict(),
|
|
)
|
|
|
|
formatted_files = (
|
|
[file.format(**format_fields) for file in extract_files]
|
|
if extract_files is not None
|
|
else None
|
|
)
|
|
|
|
files = download_asset(
|
|
asset,
|
|
extract_files=formatted_files,
|
|
destination=destination,
|
|
)
|
|
|
|
if exec:
|
|
check_call(
|
|
exec.format(asset["name"], **format_fields), shell=True, cwd=destination
|
|
)
|
|
|
|
return files
|
|
|
|
|
|
def main():
|
|
args = _parse_args()
|
|
|
|
logging.getLogger().setLevel(30 - 10 * args.v)
|
|
|
|
# Fetch the release
|
|
release = fetch_release(
|
|
GitRemoteInfo(args.hostname, args.owner, args.repo),
|
|
version=args.version,
|
|
pre_release=args.prerelease,
|
|
)
|
|
|
|
logging.debug("Found release: %s", release["name"])
|
|
|
|
version = args.version or release["tag_name"]
|
|
|
|
logging.debug("Release version: %s", version)
|
|
|
|
# Find the asset to download using mapping rules
|
|
asset, matched_values = match_asset(
|
|
release,
|
|
args.format,
|
|
version=version,
|
|
system_mapping=args.map_system,
|
|
arch_mapping=args.map_arch,
|
|
)
|
|
|
|
logging.info(f"Downloading {asset['name']} from release {release['name']}")
|
|
|
|
if args.url_only:
|
|
print(asset["browser_download_url"])
|
|
return
|
|
|
|
format_fields = dict(
|
|
asset_name=asset["name"],
|
|
**matched_values._asdict(),
|
|
)
|
|
|
|
# Format files to extract with version info, as this is sometimes included
|
|
formatted_files = (
|
|
[file.format(**format_fields) for file in args.extract_files]
|
|
if args.extract_files is not None
|
|
else None
|
|
)
|
|
|
|
files = download_asset(
|
|
asset,
|
|
extract_files=formatted_files,
|
|
destination=args.destination,
|
|
)
|
|
|
|
print(f"Downloaded {', '.join(str(f) for f in files)}")
|
|
|
|
# Optionally execute post command
|
|
if args.exec:
|
|
check_call(
|
|
args.exec.format(asset["name"], **format_fields),
|
|
shell=True,
|
|
cwd=args.destination,
|
|
)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|