527 lines
17 KiB
Python
527 lines
17 KiB
Python
# Used by pkgs/misc/vim-plugins/update.py and pkgs/applications/editors/kakoune/plugins/update.py
|
|
|
|
# format:
|
|
# $ nix run nixpkgs.python3Packages.black -c black update.py
|
|
# type-check:
|
|
# $ nix run nixpkgs.python3Packages.mypy -c mypy update.py
|
|
# linted:
|
|
# $ nix run nixpkgs.python3Packages.flake8 -c flake8 --ignore E501,E265 update.py
|
|
|
|
import argparse
|
|
import functools
|
|
import http
|
|
import json
|
|
import os
|
|
import subprocess
|
|
import sys
|
|
import time
|
|
import traceback
|
|
import urllib.error
|
|
import urllib.parse
|
|
import urllib.request
|
|
import xml.etree.ElementTree as ET
|
|
from datetime import datetime
|
|
from functools import wraps
|
|
from multiprocessing.dummy import Pool
|
|
from pathlib import Path
|
|
from typing import Dict, List, Optional, Tuple, Union, Any, Callable
|
|
from urllib.parse import urljoin, urlparse
|
|
from tempfile import NamedTemporaryFile
|
|
|
|
import git
|
|
|
|
ATOM_ENTRY = "{http://www.w3.org/2005/Atom}entry" # " vim gets confused here
|
|
ATOM_LINK = "{http://www.w3.org/2005/Atom}link" # "
|
|
ATOM_UPDATED = "{http://www.w3.org/2005/Atom}updated" # "
|
|
|
|
|
|
def retry(ExceptionToCheck: Any, tries: int = 4, delay: float = 3, backoff: float = 2):
|
|
"""Retry calling the decorated function using an exponential backoff.
|
|
http://www.saltycrane.com/blog/2009/11/trying-out-retry-decorator-python/
|
|
original from: http://wiki.python.org/moin/PythonDecoratorLibrary#Retry
|
|
(BSD licensed)
|
|
:param ExceptionToCheck: the exception on which to retry
|
|
:param tries: number of times to try (not retry) before giving up
|
|
:param delay: initial delay between retries in seconds
|
|
:param backoff: backoff multiplier e.g. value of 2 will double the delay
|
|
each retry
|
|
"""
|
|
|
|
def deco_retry(f: Callable) -> Callable:
|
|
@wraps(f)
|
|
def f_retry(*args: Any, **kwargs: Any) -> Any:
|
|
mtries, mdelay = tries, delay
|
|
while mtries > 1:
|
|
try:
|
|
return f(*args, **kwargs)
|
|
except ExceptionToCheck as e:
|
|
print(f"{str(e)}, Retrying in {mdelay} seconds...")
|
|
time.sleep(mdelay)
|
|
mtries -= 1
|
|
mdelay *= backoff
|
|
return f(*args, **kwargs)
|
|
|
|
return f_retry # true decorator
|
|
|
|
return deco_retry
|
|
|
|
|
|
def make_request(url: str) -> urllib.request.Request:
|
|
token = os.getenv("GITHUB_API_TOKEN")
|
|
headers = {}
|
|
if token is not None:
|
|
headers["Authorization"] = f"token {token}"
|
|
return urllib.request.Request(url, headers=headers)
|
|
|
|
|
|
class Repo:
|
|
def __init__(
|
|
self, owner: str, name: str, branch: str, alias: Optional[str]
|
|
) -> None:
|
|
self.owner = owner
|
|
self.name = name
|
|
self.branch = branch
|
|
self.alias = alias
|
|
self.redirect: Dict[str, str] = {}
|
|
|
|
def url(self, path: str) -> str:
|
|
return urljoin(f"https://github.com/{self.owner}/{self.name}/", path)
|
|
|
|
def __repr__(self) -> str:
|
|
return f"Repo({self.owner}, {self.name})"
|
|
|
|
@retry(urllib.error.URLError, tries=4, delay=3, backoff=2)
|
|
def has_submodules(self) -> bool:
|
|
try:
|
|
req = make_request(self.url(f"blob/{self.branch}/.gitmodules"))
|
|
urllib.request.urlopen(req, timeout=10).close()
|
|
except urllib.error.HTTPError as e:
|
|
if e.code == 404:
|
|
return False
|
|
else:
|
|
raise
|
|
return True
|
|
|
|
@retry(urllib.error.URLError, tries=4, delay=3, backoff=2)
|
|
def latest_commit(self) -> Tuple[str, datetime]:
|
|
commit_url = self.url(f"commits/{self.branch}.atom")
|
|
commit_req = make_request(commit_url)
|
|
with urllib.request.urlopen(commit_req, timeout=10) as req:
|
|
self.check_for_redirect(commit_url, req)
|
|
xml = req.read()
|
|
root = ET.fromstring(xml)
|
|
latest_entry = root.find(ATOM_ENTRY)
|
|
assert latest_entry is not None, f"No commits found in repository {self}"
|
|
commit_link = latest_entry.find(ATOM_LINK)
|
|
assert commit_link is not None, f"No link tag found feed entry {xml}"
|
|
url = urlparse(commit_link.get("href"))
|
|
updated_tag = latest_entry.find(ATOM_UPDATED)
|
|
assert (
|
|
updated_tag is not None and updated_tag.text is not None
|
|
), f"No updated tag found feed entry {xml}"
|
|
updated = datetime.strptime(updated_tag.text, "%Y-%m-%dT%H:%M:%SZ")
|
|
return Path(str(url.path)).name, updated
|
|
|
|
def check_for_redirect(self, url: str, req: http.client.HTTPResponse):
|
|
response_url = req.geturl()
|
|
if url != response_url:
|
|
new_owner, new_name = (
|
|
urllib.parse.urlsplit(response_url).path.strip("/").split("/")[:2]
|
|
)
|
|
end_line = "\n" if self.alias is None else f" as {self.alias}\n"
|
|
plugin_line = "{owner}/{name}" + end_line
|
|
|
|
old_plugin = plugin_line.format(owner=self.owner, name=self.name)
|
|
new_plugin = plugin_line.format(owner=new_owner, name=new_name)
|
|
self.redirect[old_plugin] = new_plugin
|
|
|
|
def prefetch_git(self, ref: str) -> str:
|
|
data = subprocess.check_output(
|
|
["nix-prefetch-git", "--fetch-submodules", self.url(""), ref]
|
|
)
|
|
return json.loads(data)["sha256"]
|
|
|
|
def prefetch_github(self, ref: str) -> str:
|
|
data = subprocess.check_output(
|
|
["nix-prefetch-url", "--unpack", self.url(f"archive/{ref}.tar.gz")]
|
|
)
|
|
return data.strip().decode("utf-8")
|
|
|
|
|
|
class Plugin:
|
|
def __init__(
|
|
self,
|
|
name: str,
|
|
commit: str,
|
|
has_submodules: bool,
|
|
sha256: str,
|
|
date: Optional[datetime] = None,
|
|
) -> None:
|
|
self.name = name
|
|
self.commit = commit
|
|
self.has_submodules = has_submodules
|
|
self.sha256 = sha256
|
|
self.date = date
|
|
|
|
@property
|
|
def normalized_name(self) -> str:
|
|
return self.name.replace(".", "-")
|
|
|
|
@property
|
|
def version(self) -> str:
|
|
assert self.date is not None
|
|
return self.date.strftime("%Y-%m-%d")
|
|
|
|
def as_json(self) -> Dict[str, str]:
|
|
copy = self.__dict__.copy()
|
|
del copy["date"]
|
|
return copy
|
|
|
|
|
|
class Editor:
|
|
"""The configuration of the update script."""
|
|
|
|
def __init__(
|
|
self,
|
|
name: str,
|
|
root: Path,
|
|
get_plugins: str,
|
|
generate_nix: Callable[[List[Tuple[str, str, Plugin]], str], None],
|
|
default_in: Optional[Path] = None,
|
|
default_out: Optional[Path] = None,
|
|
deprecated: Optional[Path] = None,
|
|
cache_file: Optional[str] = None,
|
|
):
|
|
self.name = name
|
|
self.root = root
|
|
self.get_plugins = get_plugins
|
|
self.generate_nix = generate_nix
|
|
self.default_in = default_in or root.joinpath(f"{name}-plugin-names")
|
|
self.default_out = default_out or root.joinpath("generated.nix")
|
|
self.deprecated = deprecated or root.joinpath("deprecated.json")
|
|
self.cache_file = cache_file or f"{name}-plugin-cache.json"
|
|
|
|
|
|
class CleanEnvironment(object):
|
|
def __enter__(self) -> None:
|
|
self.old_environ = os.environ.copy()
|
|
local_pkgs = str(Path(__file__).parent.parent.parent)
|
|
os.environ["NIX_PATH"] = f"localpkgs={local_pkgs}"
|
|
self.empty_config = NamedTemporaryFile()
|
|
self.empty_config.write(b"{}")
|
|
self.empty_config.flush()
|
|
os.environ["NIXPKGS_CONFIG"] = self.empty_config.name
|
|
|
|
def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> None:
|
|
os.environ.update(self.old_environ)
|
|
self.empty_config.close()
|
|
|
|
|
|
def get_current_plugins(editor: Editor) -> List[Plugin]:
|
|
with CleanEnvironment():
|
|
out = subprocess.check_output(["nix", "eval", "--json", editor.get_plugins])
|
|
data = json.loads(out)
|
|
plugins = []
|
|
for name, attr in data.items():
|
|
p = Plugin(name, attr["rev"], attr["submodules"], attr["sha256"])
|
|
plugins.append(p)
|
|
return plugins
|
|
|
|
|
|
def prefetch_plugin(
|
|
user: str,
|
|
repo_name: str,
|
|
branch: str,
|
|
alias: Optional[str],
|
|
cache: "Optional[Cache]" = None,
|
|
) -> Tuple[Plugin, Dict[str, str]]:
|
|
repo = Repo(user, repo_name, branch, alias)
|
|
commit, date = repo.latest_commit()
|
|
has_submodules = repo.has_submodules()
|
|
cached_plugin = cache[commit] if cache else None
|
|
if cached_plugin is not None:
|
|
cached_plugin.name = alias or repo_name
|
|
cached_plugin.date = date
|
|
return cached_plugin, repo.redirect
|
|
|
|
print(f"prefetch {user}/{repo_name}")
|
|
if has_submodules:
|
|
sha256 = repo.prefetch_git(commit)
|
|
else:
|
|
sha256 = repo.prefetch_github(commit)
|
|
|
|
return (
|
|
Plugin(alias or repo_name, commit, has_submodules, sha256, date=date),
|
|
repo.redirect,
|
|
)
|
|
|
|
|
|
def fetch_plugin_from_pluginline(plugin_line: str) -> Plugin:
|
|
plugin, _ = prefetch_plugin(*parse_plugin_line(plugin_line))
|
|
return plugin
|
|
|
|
|
|
def print_download_error(plugin: str, ex: Exception):
|
|
print(f"{plugin}: {ex}", file=sys.stderr)
|
|
ex_traceback = ex.__traceback__
|
|
tb_lines = [
|
|
line.rstrip("\n")
|
|
for line in traceback.format_exception(ex.__class__, ex, ex_traceback)
|
|
]
|
|
print("\n".join(tb_lines))
|
|
|
|
|
|
def check_results(
|
|
results: List[Tuple[str, str, Union[Exception, Plugin], Dict[str, str]]]
|
|
) -> Tuple[List[Tuple[str, str, Plugin]], Dict[str, str]]:
|
|
failures: List[Tuple[str, Exception]] = []
|
|
plugins = []
|
|
redirects: Dict[str, str] = {}
|
|
for (owner, name, result, redirect) in results:
|
|
if isinstance(result, Exception):
|
|
failures.append((name, result))
|
|
else:
|
|
plugins.append((owner, name, result))
|
|
redirects.update(redirect)
|
|
|
|
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 parse_plugin_line(line: str) -> Tuple[str, str, str, Optional[str]]:
|
|
branch = "master"
|
|
alias = None
|
|
name, repo = line.split("/")
|
|
if " as " in repo:
|
|
repo, alias = repo.split(" as ")
|
|
alias = alias.strip()
|
|
if "@" in repo:
|
|
repo, branch = repo.split("@")
|
|
|
|
return (name.strip(), repo.strip(), branch.strip(), alias)
|
|
|
|
|
|
def load_plugin_spec(plugin_file: str) -> List[Tuple[str, str, str, Optional[str]]]:
|
|
plugins = []
|
|
with open(plugin_file) as f:
|
|
for line in f:
|
|
plugin = parse_plugin_line(line)
|
|
if not plugin[0]:
|
|
msg = f"Invalid repository {line}, must be in the format owner/repo[ as alias]"
|
|
print(msg, file=sys.stderr)
|
|
sys.exit(1)
|
|
plugins.append(plugin)
|
|
return plugins
|
|
|
|
|
|
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(
|
|
args: Tuple[str, str, str, Optional[str]], cache: Cache
|
|
) -> Tuple[str, str, Union[Exception, Plugin], dict]:
|
|
assert len(args) == 4
|
|
owner, repo, branch, alias = args
|
|
try:
|
|
plugin, redirect = prefetch_plugin(owner, repo, branch, alias, cache)
|
|
cache[plugin.commit] = plugin
|
|
return (owner, repo, plugin, redirect)
|
|
except Exception as e:
|
|
return (owner, repo, e, {})
|
|
|
|
|
|
def rewrite_input(
|
|
input_file: Path,
|
|
deprecated: Path,
|
|
redirects: Dict[str, str] = None,
|
|
append: Tuple = (),
|
|
):
|
|
with open(input_file, "r") as f:
|
|
lines = f.readlines()
|
|
|
|
lines.extend(append)
|
|
|
|
if redirects:
|
|
lines = [redirects.get(line, line) for line in lines]
|
|
|
|
cur_date_iso = datetime.now().strftime("%Y-%m-%d")
|
|
with open(deprecated, "r") as f:
|
|
deprecations = json.load(f)
|
|
for old, new in redirects.items():
|
|
old_plugin = fetch_plugin_from_pluginline(old)
|
|
new_plugin = fetch_plugin_from_pluginline(new)
|
|
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)
|
|
|
|
lines = sorted(lines, key=str.casefold)
|
|
|
|
with open(input_file, "w") as f:
|
|
f.writelines(lines)
|
|
|
|
|
|
def parse_args(editor: Editor):
|
|
parser = argparse.ArgumentParser(
|
|
description=(
|
|
f"Updates nix derivations for {editor.name} plugins"
|
|
f"By default from {editor.default_in} to {editor.default_out}"
|
|
)
|
|
)
|
|
parser.add_argument(
|
|
"--add",
|
|
dest="add_plugins",
|
|
default=[],
|
|
action="append",
|
|
help=f"Plugin to add to {editor.name}Plugins from Github in the form owner/repo",
|
|
)
|
|
parser.add_argument(
|
|
"--input-names",
|
|
"-i",
|
|
dest="input_file",
|
|
default=editor.default_in,
|
|
help="A list of plugins in the form owner/repo",
|
|
)
|
|
parser.add_argument(
|
|
"--out",
|
|
"-o",
|
|
dest="outfile",
|
|
default=editor.default_out,
|
|
help="Filename to save generated nix code",
|
|
)
|
|
parser.add_argument(
|
|
"--proc",
|
|
"-p",
|
|
dest="proc",
|
|
type=int,
|
|
default=30,
|
|
help="Number of concurrent processes to spawn.",
|
|
)
|
|
return parser.parse_args()
|
|
|
|
|
|
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 get_update(input_file: str, outfile: str, proc: int, editor: Editor):
|
|
cache: Cache = Cache(get_current_plugins(editor), editor.cache_file)
|
|
_prefetch = functools.partial(prefetch, cache=cache)
|
|
|
|
def update() -> dict:
|
|
plugin_names = load_plugin_spec(input_file)
|
|
|
|
try:
|
|
pool = Pool(processes=proc)
|
|
results = pool.map(_prefetch, plugin_names)
|
|
finally:
|
|
cache.store()
|
|
|
|
plugins, redirects = check_results(results)
|
|
|
|
editor.generate_nix(plugins, outfile)
|
|
|
|
return redirects
|
|
|
|
return update
|
|
|
|
|
|
def update_plugins(editor: Editor):
|
|
"""The main entry function of this module. All input arguments are grouped in the `Editor`."""
|
|
|
|
args = parse_args(editor)
|
|
nixpkgs_repo = git.Repo(editor.root, search_parent_directories=True)
|
|
update = get_update(args.input_file, args.outfile, args.proc, editor)
|
|
|
|
redirects = update()
|
|
rewrite_input(args.input_file, editor.deprecated, redirects)
|
|
commit(nixpkgs_repo, f"{editor.name}Plugins: update", [args.outfile])
|
|
|
|
if redirects:
|
|
update()
|
|
commit(
|
|
nixpkgs_repo,
|
|
f"{editor.name}Plugins: resolve github repository redirects",
|
|
[args.outfile, args.input_file, editor.deprecated],
|
|
)
|
|
|
|
for plugin_line in args.add_plugins:
|
|
rewrite_input(args.input_file, editor.deprecated, append=(plugin_line + "\n",))
|
|
update()
|
|
plugin = fetch_plugin_from_pluginline(plugin_line)
|
|
commit(
|
|
nixpkgs_repo,
|
|
"{editor}Plugins.{name}: init at {version}".format(
|
|
editor=editor.name, name=plugin.normalized_name, version=plugin.version
|
|
),
|
|
[args.outfile, args.input_file],
|
|
)
|