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pmbootstrap/pmb/helpers/repo.py

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# Copyright 2023 Oliver Smith
# SPDX-License-Identifier: GPL-3.0-or-later
"""
Functions that work with binary package repos.
See also:
- pmb/helpers/pmaports.py (work with pmaports)
- pmb/helpers/package.py (work with both)
"""
import os
import hashlib
from pmb.core.context import get_context
from pmb.core.arch import Arch
from pmb.core.pkgrepo import pkgrepo_names
from pmb.helpers import logging
from pathlib import Path
from typing import List, Optional
import pmb.config.pmaports
from pmb.meta import Cache
import pmb.helpers.http
import pmb.helpers.run
import pmb.helpers.other
def apkindex_hash(url: str, length: int = 8) -> Path:
r"""Generate the hash that APK adds to the APKINDEX and apk packages in its apk cache folder.
It is the "12345678" part in this example:
"APKINDEX.12345678.tar.gz".
:param length: The length of the hash in the output file.
See also: official implementation in apk-tools:
<https://git.alpinelinux.org/cgit/apk-tools/>
blob.c: apk_blob_push_hexdump(), "const char \\*xd"
apk_defines.h: APK_CACHE_CSUM_BYTES
database.c: apk_repo_format_cache_index()
"""
binary = hashlib.sha1(url.encode("utf-8")).digest()
xd = "0123456789abcdefghijklmnopqrstuvwxyz"
csum_bytes = int(length / 2)
ret = ""
for i in range(csum_bytes):
ret += xd[(binary[i] >> 4) & 0xF]
ret += xd[binary[i] & 0xF]
return Path(f"APKINDEX.{ret}.tar.gz")
# FIXME: make config.mirrors a normal dict
# mypy: disable-error-code="literal-required"
@Cache("user_repository", "mirrors_exclude")
def urls(user_repository=False, mirrors_exclude: List[str] = []):
"""Get a list of repository URLs, as they are in /etc/apk/repositories.
:param user_repository: add /mnt/pmbootstrap/packages
:param mirrors_exclude: mirrors to exclude (see pmb.core.config.Mirrors)
:returns: list of mirror strings, like ["/mnt/pmbootstrap/packages",
"http://...", ...]
"""
ret: List[str] = []
config = get_context().config
# Get mirrordirs from channels.cfg (postmarketOS mirrordir is the same as
# the pmaports branch of the channel, no need to make it more complicated)
channel_cfg = pmb.config.pmaports.read_config_channel()
mirrordir_pmos = channel_cfg["branch_pmaports"]
mirrordir_alpine = channel_cfg["mirrordir_alpine"]
# Local user repository (for packages compiled with pmbootstrap)
if user_repository:
for channel in pmb.config.pmaports.all_channels():
ret.append(f"/mnt/pmbootstrap/packages/{channel}")
# Don't add the systemd mirror if systemd is disabled
if not pmb.config.is_systemd_selected(config):
mirrors_exclude.append("systemd")
# ["pmaports", "systemd", "alpine", "plasma-nightly"]
# print(f"Mirrors: repos: {pkgrepo_names()} exclude: {mirrors_exclude}")
for repo in pkgrepo_names() + ["alpine"]:
if repo in mirrors_exclude:
continue
mirror = config.mirrors[repo]
mirrordirs = []
if repo == "alpine":
# FIXME: This is a bit of a mess
mirrordirs = [f"{mirrordir_alpine}/main", f"{mirrordir_alpine}/community"]
if mirrordir_alpine == "edge":
mirrordirs.append(f"{mirrordir_alpine}/testing")
else:
mirrordirs = [mirrordir_pmos]
for mirrordir in mirrordirs:
url = os.path.join(mirror, mirrordir)
if url not in ret:
ret.append(url)
return ret
def apkindex_files(
arch: Optional[Arch] = None, user_repository=True, exclude_mirrors: List[str] = []
) -> List[Path]:
"""Get a list of outside paths to all resolved APKINDEX.tar.gz files for a specific arch.
:param arch: defaults to native
:param user_repository: add path to index of locally built packages
:param exclude_mirrors: list of mirrors to exclude (e.g. ["alpine", "pmaports"])
:returns: list of absolute APKINDEX.tar.gz file paths
"""
if not arch:
arch = Arch.native()
ret = []
# Local user repository (for packages compiled with pmbootstrap)
if user_repository:
for channel in pmb.config.pmaports.all_channels():
ret.append(get_context().config.work / "packages" / channel / arch / "APKINDEX.tar.gz")
# Resolve the APKINDEX.$HASH.tar.gz files
for url in urls(False, exclude_mirrors):
ret.append(get_context().config.work / f"cache_apk_{arch}" / apkindex_hash(url))
return ret
@Cache("arch", force=False)
def update(arch: Optional[Arch] = None, force=False, existing_only=False):
"""Download the APKINDEX files for all URLs depending on the architectures.
:param arch: * one Alpine architecture name ("x86_64", "armhf", ...)
* None for all architectures
:param force: even update when the APKINDEX file is fairly recent
:param existing_only: only update the APKINDEX files that already exist,
this is used by "pmbootstrap update"
:returns: True when files have been downloaded, False otherwise
"""
# Skip in offline mode, only show once
cache_key = "pmb.helpers.repo.update"
if get_context().offline:
if not pmb.helpers.other.cache[cache_key]["offline_msg_shown"]:
logging.info("NOTE: skipping package index update (offline mode)")
pmb.helpers.other.cache[cache_key]["offline_msg_shown"] = True
return False
# Architectures and retention time
architectures = [arch] if arch else Arch.supported()
retention_hours = pmb.config.apkindex_retention_time
retention_seconds = retention_hours * 3600
# Find outdated APKINDEX files. Formats:
# outdated: {URL: apkindex_path, ... }
# outdated_arches: ["armhf", "x86_64", ... ]
outdated = {}
outdated_arches: List[Arch] = []
for url in urls(False):
for arch in architectures:
# APKINDEX file name from the URL
url_full = f"{url}/{arch}/APKINDEX.tar.gz"
cache_apk_outside = get_context().config.work / f"cache_apk_{arch}"
apkindex = cache_apk_outside / f"{apkindex_hash(url)}"
# Find update reason, possibly skip non-existing or known 404 files
reason = None
if url_full in pmb.helpers.other.cache[cache_key]["404"]:
# We already attempted to download this file once in this
# session
continue
elif not os.path.exists(apkindex):
if existing_only:
continue
reason = "file does not exist yet"
elif force:
reason = "forced update"
elif pmb.helpers.file.is_older_than(apkindex, retention_seconds):
reason = "older than " + str(retention_hours) + "h"
if not reason:
continue
# Update outdated and outdated_arches
logging.debug("APKINDEX outdated (" + reason + "): " + url_full)
outdated[url_full] = apkindex
if arch not in outdated_arches:
outdated_arches.append(arch)
# Bail out or show log message
if not len(outdated):
return False
logging.info(
"Update package index for "
+ ", ".join([str(a) for a in outdated_arches])
+ " ("
+ str(len(outdated))
+ " file(s))"
)
# Download and move to right location
for i, (url, target) in enumerate(outdated.items()):
pmb.helpers.cli.progress_print(i / len(outdated))
temp = pmb.helpers.http.download(url, "APKINDEX", False, logging.DEBUG, True)
if not temp:
pmb.helpers.other.cache[cache_key]["404"].append(url)
continue
target_folder = os.path.dirname(target)
if not os.path.exists(target_folder):
pmb.helpers.run.root(["mkdir", "-p", target_folder])
pmb.helpers.run.root(["cp", temp, target])
pmb.helpers.cli.progress_flush()
return True
def alpine_apkindex_path(repo="main", arch: Optional[Arch] = None):
"""Get the path to a specific Alpine APKINDEX file on disk and download it if necessary.
:param repo: Alpine repository name (e.g. "main")
:param arch: Alpine architecture (e.g. "armhf"), defaults to native arch.
:returns: full path to the APKINDEX file
"""
# Repo sanity check
if repo not in ["main", "community", "testing", "non-free"]:
raise RuntimeError(f"Invalid Alpine repository: {repo}")
# Download the file
arch = arch or Arch.native()
update(arch)
# Find it on disk
channel_cfg = pmb.config.pmaports.read_config_channel()
repo_link = f"{get_context().config.mirrors["alpine"]}{channel_cfg['mirrordir_alpine']}/{repo}"
cache_folder = get_context().config.work / (f"cache_apk_{arch}")
return cache_folder / apkindex_hash(repo_link)
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