d4894355c1
I've been working for a long time towards automatic nix dependencies for neovim plugins (using luarocks rockspecs to discover the said dependencies). This is an initial commit to help me complete the missing bits. buildNeovimPluginFrom2Nix is right now a placeholder which helps me test in my fork a version that does a flat install of luarocks. the vim updater will now check for attributes with the same name in the lua package set, if that's the case the script will generate buildNeovimPluginFrom2Nix.
702 lines
22 KiB
Python
702 lines
22 KiB
Python
# Used by pkgs/applications/editors/vim/plugins/update.py and pkgs/applications/editors/kakoune/plugins/update.py
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# format:
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# $ nix run nixpkgs.python3Packages.black -c black update.py
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# type-check:
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# $ nix run nixpkgs.python3Packages.mypy -c mypy update.py
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# linted:
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# $ nix run nixpkgs.python3Packages.flake8 -c flake8 --ignore E501,E265 update.py
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import argparse
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import csv
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import functools
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import http
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import json
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import os
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import subprocess
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import logging
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import sys
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import time
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import traceback
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import urllib.error
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import urllib.parse
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import urllib.request
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import xml.etree.ElementTree as ET
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from datetime import datetime
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from functools import wraps
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from multiprocessing.dummy import Pool
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from pathlib import Path
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from typing import Dict, List, Optional, Tuple, Union, Any, Callable
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from urllib.parse import urljoin, urlparse
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from tempfile import NamedTemporaryFile
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from dataclasses import dataclass, asdict
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import git
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ATOM_ENTRY = "{http://www.w3.org/2005/Atom}entry" # " vim gets confused here
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ATOM_LINK = "{http://www.w3.org/2005/Atom}link" # "
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ATOM_UPDATED = "{http://www.w3.org/2005/Atom}updated" # "
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LOG_LEVELS = {
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logging.getLevelName(level): level for level in [
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logging.DEBUG, logging.INFO, logging.WARN, logging.ERROR ]
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}
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log = logging.getLogger()
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def retry(ExceptionToCheck: Any, tries: int = 4, delay: float = 3, backoff: float = 2):
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"""Retry calling the decorated function using an exponential backoff.
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http://www.saltycrane.com/blog/2009/11/trying-out-retry-decorator-python/
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original from: http://wiki.python.org/moin/PythonDecoratorLibrary#Retry
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(BSD licensed)
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:param ExceptionToCheck: the exception on which to retry
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:param tries: number of times to try (not retry) before giving up
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:param delay: initial delay between retries in seconds
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:param backoff: backoff multiplier e.g. value of 2 will double the delay
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each retry
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"""
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def deco_retry(f: Callable) -> Callable:
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@wraps(f)
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def f_retry(*args: Any, **kwargs: Any) -> Any:
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mtries, mdelay = tries, delay
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while mtries > 1:
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try:
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return f(*args, **kwargs)
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except ExceptionToCheck as e:
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print(f"{str(e)}, Retrying in {mdelay} seconds...")
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time.sleep(mdelay)
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mtries -= 1
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mdelay *= backoff
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return f(*args, **kwargs)
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return f_retry # true decorator
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return deco_retry
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@dataclass
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class FetchConfig:
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proc: int
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github_token: str
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def make_request(url: str, token=None) -> urllib.request.Request:
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headers = {}
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if token is not None:
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headers["Authorization"] = f"token {token}"
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return urllib.request.Request(url, headers=headers)
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# a dictionary of plugins and their new repositories
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Redirects = Dict['PluginDesc', 'Repo']
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class Repo:
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def __init__(
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self, uri: str, branch: str
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) -> None:
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self.uri = uri
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'''Url to the repo'''
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self._branch = branch
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# Redirect is the new Repo to use
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self.redirect: Optional['Repo'] = None
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self.token = "dummy_token"
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@property
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def name(self):
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return self.uri.split('/')[-1]
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@property
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def branch(self):
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return self._branch or "HEAD"
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def __str__(self) -> str:
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return f"{self.uri}"
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def __repr__(self) -> str:
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return f"Repo({self.name}, {self.uri})"
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@retry(urllib.error.URLError, tries=4, delay=3, backoff=2)
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def has_submodules(self) -> bool:
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return True
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@retry(urllib.error.URLError, tries=4, delay=3, backoff=2)
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def latest_commit(self) -> Tuple[str, datetime]:
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log.debug("Latest commit")
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loaded = self._prefetch(None)
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updated = datetime.strptime(loaded['date'], "%Y-%m-%dT%H:%M:%S%z")
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return loaded['rev'], updated
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def _prefetch(self, ref: Optional[str]):
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cmd = ["nix-prefetch-git", "--quiet", "--fetch-submodules", self.uri]
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if ref is not None:
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cmd.append(ref)
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log.debug(cmd)
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data = subprocess.check_output(cmd)
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loaded = json.loads(data)
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return loaded
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def prefetch(self, ref: Optional[str]) -> str:
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print("Prefetching")
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loaded = self._prefetch(ref)
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return loaded["sha256"]
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def as_nix(self, plugin: "Plugin") -> str:
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return f'''fetchgit {{
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url = "{self.uri}";
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rev = "{plugin.commit}";
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sha256 = "{plugin.sha256}";
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}}'''
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class RepoGitHub(Repo):
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def __init__(
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self, owner: str, repo: str, branch: str
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) -> None:
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self.owner = owner
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self.repo = repo
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self.token = None
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'''Url to the repo'''
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super().__init__(self.url(""), branch)
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log.debug("Instantiating github repo owner=%s and repo=%s", self.owner, self.repo)
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@property
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def name(self):
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return self.repo
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def url(self, path: str) -> str:
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res = urljoin(f"https://github.com/{self.owner}/{self.repo}/", path)
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return res
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@retry(urllib.error.URLError, tries=4, delay=3, backoff=2)
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def has_submodules(self) -> bool:
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try:
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req = make_request(self.url(f"blob/{self.branch}/.gitmodules"), self.token)
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urllib.request.urlopen(req, timeout=10).close()
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except urllib.error.HTTPError as e:
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if e.code == 404:
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return False
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else:
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raise
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return True
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@retry(urllib.error.URLError, tries=4, delay=3, backoff=2)
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def latest_commit(self) -> Tuple[str, datetime]:
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commit_url = self.url(f"commits/{self.branch}.atom")
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log.debug("Sending request to %s", commit_url)
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commit_req = make_request(commit_url, self.token)
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with urllib.request.urlopen(commit_req, timeout=10) as req:
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self._check_for_redirect(commit_url, req)
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xml = req.read()
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root = ET.fromstring(xml)
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latest_entry = root.find(ATOM_ENTRY)
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assert latest_entry is not None, f"No commits found in repository {self}"
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commit_link = latest_entry.find(ATOM_LINK)
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assert commit_link is not None, f"No link tag found feed entry {xml}"
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url = urlparse(commit_link.get("href"))
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updated_tag = latest_entry.find(ATOM_UPDATED)
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assert (
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updated_tag is not None and updated_tag.text is not None
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), f"No updated tag found feed entry {xml}"
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updated = datetime.strptime(updated_tag.text, "%Y-%m-%dT%H:%M:%SZ")
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return Path(str(url.path)).name, updated
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def _check_for_redirect(self, url: str, req: http.client.HTTPResponse):
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response_url = req.geturl()
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if url != response_url:
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new_owner, new_name = (
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urllib.parse.urlsplit(response_url).path.strip("/").split("/")[:2]
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)
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new_repo = RepoGitHub(owner=new_owner, repo=new_name, branch=self.branch)
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self.redirect = new_repo
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def prefetch(self, commit: str) -> str:
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if self.has_submodules():
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sha256 = super().prefetch(commit)
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else:
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sha256 = self.prefetch_github(commit)
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return sha256
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def prefetch_github(self, ref: str) -> str:
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cmd = ["nix-prefetch-url", "--unpack", self.url(f"archive/{ref}.tar.gz")]
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log.debug("Running %s", cmd)
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data = subprocess.check_output(cmd)
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return data.strip().decode("utf-8")
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def as_nix(self, plugin: "Plugin") -> str:
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if plugin.has_submodules:
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submodule_attr = "\n fetchSubmodules = true;"
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else:
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submodule_attr = ""
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return f'''fetchFromGitHub {{
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owner = "{self.owner}";
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repo = "{self.repo}";
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rev = "{plugin.commit}";
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sha256 = "{plugin.sha256}";{submodule_attr}
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}}'''
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@dataclass(frozen=True)
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class PluginDesc:
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repo: Repo
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branch: str
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alias: Optional[str]
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@property
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def name(self):
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if self.alias is None:
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return self.repo.name
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else:
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return self.alias
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def __lt__(self, other):
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return self.repo.name < other.repo.name
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@staticmethod
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def load_from_csv(config: FetchConfig, row: Dict[str, str]) -> 'PluginDesc':
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branch = row["branch"]
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repo = make_repo(row['repo'], branch.strip())
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repo.token = config.github_token
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return PluginDesc(repo, branch.strip(), row["alias"])
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@staticmethod
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def load_from_string(config: FetchConfig, line: str) -> 'PluginDesc':
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branch = "HEAD"
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alias = None
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uri = line
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if " as " in uri:
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uri, alias = uri.split(" as ")
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alias = alias.strip()
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if "@" in uri:
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uri, branch = uri.split("@")
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repo = make_repo(uri.strip(), branch.strip())
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repo.token = config.github_token
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return PluginDesc(repo, branch.strip(), alias)
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@dataclass
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class Plugin:
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name: str
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commit: str
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has_submodules: bool
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sha256: str
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date: Optional[datetime] = None
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@property
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def normalized_name(self) -> str:
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return self.name.replace(".", "-")
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@property
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def version(self) -> str:
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assert self.date is not None
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return self.date.strftime("%Y-%m-%d")
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def as_json(self) -> Dict[str, str]:
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copy = self.__dict__.copy()
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del copy["date"]
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return copy
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def load_plugins_from_csv(config: FetchConfig, input_file: Path,) -> List[PluginDesc]:
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log.debug("Load plugins from csv %s", input_file)
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plugins = []
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with open(input_file, newline='') as csvfile:
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log.debug("Writing into %s", input_file)
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reader = csv.DictReader(csvfile,)
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for line in reader:
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plugin = PluginDesc.load_from_csv(config, line)
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plugins.append(plugin)
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return plugins
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def run_nix_expr(expr):
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with CleanEnvironment():
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cmd = ["nix", "eval", "--extra-experimental-features",
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"nix-command", "--impure", "--json", "--expr", expr]
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log.debug("Running command %s", cmd)
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out = subprocess.check_output(cmd)
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data = json.loads(out)
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return data
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class Editor:
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"""The configuration of the update script."""
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def __init__(
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self,
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name: str,
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root: Path,
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get_plugins: str,
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default_in: Optional[Path] = None,
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default_out: Optional[Path] = None,
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deprecated: Optional[Path] = None,
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cache_file: Optional[str] = None,
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):
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log.debug("get_plugins:", get_plugins)
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self.name = name
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self.root = root
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self.get_plugins = get_plugins
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self.default_in = default_in or root.joinpath(f"{name}-plugin-names")
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self.default_out = default_out or root.joinpath("generated.nix")
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self.deprecated = deprecated or root.joinpath("deprecated.json")
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self.cache_file = cache_file or f"{name}-plugin-cache.json"
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def get_current_plugins(self) -> List[Plugin]:
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"""To fill the cache"""
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data = run_nix_expr(self.get_plugins)
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plugins = []
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for name, attr in data.items():
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print("get_current_plugins: name %s" % name)
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p = Plugin(name, attr["rev"], attr["submodules"], attr["sha256"])
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plugins.append(p)
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return plugins
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def load_plugin_spec(self, config: FetchConfig, plugin_file) -> List[PluginDesc]:
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'''CSV spec'''
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return load_plugins_from_csv(config, plugin_file)
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def generate_nix(self, plugins, outfile: str):
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'''Returns nothing for now, writes directly to outfile'''
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raise NotImplementedError()
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def get_update(self, input_file: str, outfile: str, config: FetchConfig):
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cache: Cache = Cache(self.get_current_plugins(), self.cache_file)
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_prefetch = functools.partial(prefetch, cache=cache)
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def update() -> dict:
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plugins = self.load_plugin_spec(config, input_file)
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try:
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pool = Pool(processes=config.proc)
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results = pool.map(_prefetch, plugins)
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finally:
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cache.store()
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plugins, redirects = check_results(results)
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self.generate_nix(plugins, outfile)
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return redirects
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return update
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@property
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def attr_path(self):
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return self.name + "Plugins"
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def get_drv_name(self, name: str):
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return self.attr_path + "." + name
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def rewrite_input(self, *args, **kwargs):
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return rewrite_input(*args, **kwargs)
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def create_parser(self):
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parser = argparse.ArgumentParser(
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description=(f"""
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Updates nix derivations for {self.name} plugins.\n
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By default from {self.default_in} to {self.default_out}"""
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)
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)
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parser.add_argument(
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"--add",
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dest="add_plugins",
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default=[],
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action="append",
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help=f"Plugin to add to {self.attr_path} from Github in the form owner/repo",
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)
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parser.add_argument(
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"--input-names",
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"-i",
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dest="input_file",
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default=self.default_in,
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help="A list of plugins in the form owner/repo",
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)
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parser.add_argument(
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"--out",
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"-o",
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dest="outfile",
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default=self.default_out,
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help="Filename to save generated nix code",
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)
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parser.add_argument(
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"--proc",
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"-p",
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dest="proc",
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type=int,
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default=30,
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help="Number of concurrent processes to spawn. Setting --github-token allows higher values.",
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)
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parser.add_argument(
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"--github-token",
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"-t",
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type=str,
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default=os.getenv("GITHUB_API_TOKEN"),
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help="""Allows to set --proc to higher values.
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Uses GITHUB_API_TOKEN environment variables as the default value.""",
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)
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parser.add_argument(
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"--no-commit", "-n", action="store_true", default=False,
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help="Whether to autocommit changes"
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)
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parser.add_argument(
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"--debug", "-d", choices=LOG_LEVELS.keys(),
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default=logging.getLevelName(logging.WARN),
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help="Adjust log level"
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)
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return parser
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class CleanEnvironment(object):
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def __enter__(self) -> None:
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self.old_environ = os.environ.copy()
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local_pkgs = str(Path(__file__).parent.parent.parent)
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os.environ["NIX_PATH"] = f"localpkgs={local_pkgs}"
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self.empty_config = NamedTemporaryFile()
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self.empty_config.write(b"{}")
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self.empty_config.flush()
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os.environ["NIXPKGS_CONFIG"] = self.empty_config.name
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def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> None:
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os.environ.update(self.old_environ)
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self.empty_config.close()
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def prefetch_plugin(
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p: PluginDesc,
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cache: "Optional[Cache]" = None,
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) -> Tuple[Plugin, Optional[Repo]]:
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repo, branch, alias = p.repo, p.branch, p.alias
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name = alias or p.repo.name
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commit = None
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log.info(f"Fetching last commit for plugin {name} from {repo.uri}@{branch}")
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commit, date = repo.latest_commit()
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cached_plugin = cache[commit] if cache else None
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if cached_plugin is not None:
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log.debug("Cache hit !")
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cached_plugin.name = name
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cached_plugin.date = date
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return cached_plugin, repo.redirect
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has_submodules = repo.has_submodules()
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log.debug(f"prefetch {name}")
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sha256 = repo.prefetch(commit)
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return (
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Plugin(name, commit, has_submodules, sha256, date=date),
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repo.redirect,
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)
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def print_download_error(plugin: PluginDesc, ex: Exception):
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print(f"{plugin}: {ex}", file=sys.stderr)
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ex_traceback = ex.__traceback__
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tb_lines = [
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line.rstrip("\n")
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for line in traceback.format_exception(ex.__class__, ex, ex_traceback)
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]
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print("\n".join(tb_lines))
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def check_results(
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results: List[Tuple[PluginDesc, Union[Exception, Plugin], Optional[Repo]]]
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) -> Tuple[List[Tuple[PluginDesc, Plugin]], Redirects]:
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''' '''
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failures: List[Tuple[PluginDesc, Exception]] = []
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plugins = []
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redirects: Redirects = {}
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for (pdesc, result, redirect) in results:
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if isinstance(result, Exception):
|
|
failures.append((pdesc, result))
|
|
else:
|
|
new_pdesc = pdesc
|
|
if redirect is not None:
|
|
redirects.update({pdesc: redirect})
|
|
new_pdesc = PluginDesc(redirect, pdesc.branch, pdesc.alias)
|
|
plugins.append((new_pdesc, result))
|
|
|
|
print(f"{len(results) - len(failures)} plugins were checked", end="")
|
|
if len(failures) == 0:
|
|
print()
|
|
return plugins, redirects
|
|
else:
|
|
print(f", {len(failures)} plugin(s) could not be downloaded:\n")
|
|
|
|
for (plugin, exception) in failures:
|
|
print_download_error(plugin, exception)
|
|
|
|
sys.exit(1)
|
|
|
|
def make_repo(uri: str, branch) -> Repo:
|
|
'''Instantiate a Repo with the correct specialization depending on server (gitub spec)'''
|
|
# dumb check to see if it's of the form owner/repo (=> github) or https://...
|
|
res = urlparse(uri)
|
|
if res.netloc in [ "github.com", ""]:
|
|
res = res.path.strip('/').split('/')
|
|
repo = RepoGitHub(res[0], res[1], branch)
|
|
else:
|
|
repo = Repo(uri.strip(), branch)
|
|
return repo
|
|
|
|
|
|
def get_cache_path(cache_file_name: str) -> Optional[Path]:
|
|
xdg_cache = os.environ.get("XDG_CACHE_HOME", None)
|
|
if xdg_cache is None:
|
|
home = os.environ.get("HOME", None)
|
|
if home is None:
|
|
return None
|
|
xdg_cache = str(Path(home, ".cache"))
|
|
|
|
return Path(xdg_cache, cache_file_name)
|
|
|
|
|
|
class Cache:
|
|
def __init__(self, initial_plugins: List[Plugin], cache_file_name: str) -> None:
|
|
self.cache_file = get_cache_path(cache_file_name)
|
|
|
|
downloads = {}
|
|
for plugin in initial_plugins:
|
|
downloads[plugin.commit] = plugin
|
|
downloads.update(self.load())
|
|
self.downloads = downloads
|
|
|
|
def load(self) -> Dict[str, Plugin]:
|
|
if self.cache_file is None or not self.cache_file.exists():
|
|
return {}
|
|
|
|
downloads: Dict[str, Plugin] = {}
|
|
with open(self.cache_file) as f:
|
|
data = json.load(f)
|
|
for attr in data.values():
|
|
p = Plugin(
|
|
attr["name"], attr["commit"], attr["has_submodules"], attr["sha256"]
|
|
)
|
|
downloads[attr["commit"]] = p
|
|
return downloads
|
|
|
|
def store(self) -> None:
|
|
if self.cache_file is None:
|
|
return
|
|
|
|
os.makedirs(self.cache_file.parent, exist_ok=True)
|
|
with open(self.cache_file, "w+") as f:
|
|
data = {}
|
|
for name, attr in self.downloads.items():
|
|
data[name] = attr.as_json()
|
|
json.dump(data, f, indent=4, sort_keys=True)
|
|
|
|
def __getitem__(self, key: str) -> Optional[Plugin]:
|
|
return self.downloads.get(key, None)
|
|
|
|
def __setitem__(self, key: str, value: Plugin) -> None:
|
|
self.downloads[key] = value
|
|
|
|
|
|
def prefetch(
|
|
pluginDesc: PluginDesc, cache: Cache
|
|
) -> Tuple[PluginDesc, Union[Exception, Plugin], Optional[Repo]]:
|
|
try:
|
|
plugin, redirect = prefetch_plugin(pluginDesc, cache)
|
|
cache[plugin.commit] = plugin
|
|
return (pluginDesc, plugin, redirect)
|
|
except Exception as e:
|
|
return (pluginDesc, e, None)
|
|
|
|
|
|
|
|
def rewrite_input(
|
|
config: FetchConfig,
|
|
input_file: Path,
|
|
deprecated: Path,
|
|
# old pluginDesc and the new
|
|
redirects: Redirects = {},
|
|
append: List[PluginDesc] = [],
|
|
):
|
|
plugins = load_plugins_from_csv(config, input_file,)
|
|
|
|
plugins.extend(append)
|
|
|
|
if redirects:
|
|
|
|
cur_date_iso = datetime.now().strftime("%Y-%m-%d")
|
|
with open(deprecated, "r") as f:
|
|
deprecations = json.load(f)
|
|
for pdesc, new_repo in redirects.items():
|
|
new_pdesc = PluginDesc(new_repo, pdesc.branch, pdesc.alias)
|
|
old_plugin, _ = prefetch_plugin(pdesc)
|
|
new_plugin, _ = prefetch_plugin(new_pdesc)
|
|
if old_plugin.normalized_name != new_plugin.normalized_name:
|
|
deprecations[old_plugin.normalized_name] = {
|
|
"new": new_plugin.normalized_name,
|
|
"date": cur_date_iso,
|
|
}
|
|
with open(deprecated, "w") as f:
|
|
json.dump(deprecations, f, indent=4, sort_keys=True)
|
|
f.write("\n")
|
|
|
|
with open(input_file, "w") as f:
|
|
log.debug("Writing into %s", input_file)
|
|
# fields = dataclasses.fields(PluginDesc)
|
|
fieldnames = ['repo', 'branch', 'alias']
|
|
writer = csv.DictWriter(f, fieldnames, dialect='unix', quoting=csv.QUOTE_NONE)
|
|
writer.writeheader()
|
|
for plugin in sorted(plugins):
|
|
writer.writerow(asdict(plugin))
|
|
|
|
|
|
def commit(repo: git.Repo, message: str, files: List[Path]) -> None:
|
|
repo.index.add([str(f.resolve()) for f in files])
|
|
|
|
if repo.index.diff("HEAD"):
|
|
print(f'committing to nixpkgs "{message}"')
|
|
repo.index.commit(message)
|
|
else:
|
|
print("no changes in working tree to commit")
|
|
|
|
|
|
|
|
def update_plugins(editor: Editor, args):
|
|
"""The main entry function of this module. All input arguments are grouped in the `Editor`."""
|
|
|
|
log.setLevel(LOG_LEVELS[args.debug])
|
|
log.info("Start updating plugins")
|
|
fetch_config = FetchConfig(args.proc, args.github_token)
|
|
update = editor.get_update(args.input_file, args.outfile, fetch_config)
|
|
|
|
redirects = update()
|
|
editor.rewrite_input(fetch_config, args.input_file, editor.deprecated, redirects)
|
|
|
|
autocommit = not args.no_commit
|
|
|
|
nixpkgs_repo = None
|
|
if autocommit:
|
|
nixpkgs_repo = git.Repo(editor.root, search_parent_directories=True)
|
|
commit(nixpkgs_repo, f"{editor.attr_path}: update", [args.outfile])
|
|
|
|
if redirects:
|
|
update()
|
|
if autocommit:
|
|
commit(
|
|
nixpkgs_repo,
|
|
f"{editor.attr_path}: resolve github repository redirects",
|
|
[args.outfile, args.input_file, editor.deprecated],
|
|
)
|
|
|
|
for plugin_line in args.add_plugins:
|
|
pdesc = PluginDesc.load_from_string(fetch_config, plugin_line)
|
|
append = [ pdesc ]
|
|
editor.rewrite_input(fetch_config, args.input_file, editor.deprecated, append=append)
|
|
update()
|
|
plugin, _ = prefetch_plugin(pdesc, )
|
|
if autocommit:
|
|
commit(
|
|
nixpkgs_repo,
|
|
"{drv_name}: init at {version}".format(
|
|
drv_name=editor.get_drv_name(plugin.normalized_name),
|
|
version=plugin.version
|
|
),
|
|
[args.outfile, args.input_file],
|
|
)
|