220 lines
8.3 KiB
Python
220 lines
8.3 KiB
Python
# Copyright 2023 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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"""
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Functions that work with binary package repos. See also:
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- pmb/helpers/pmaports.py (work with pmaports)
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- pmb/helpers/package.py (work with both)
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"""
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import os
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import hashlib
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import logging
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import pmb.config.pmaports
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import pmb.helpers.http
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import pmb.helpers.run
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def hash(url, length=8):
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"""
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Generate the hash that APK adds to the APKINDEX and apk packages
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in its apk cache folder. It is the "12345678" part in this example:
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"APKINDEX.12345678.tar.gz".
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:param length: The length of the hash in the output file.
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See also: official implementation in apk-tools:
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<https://git.alpinelinux.org/cgit/apk-tools/>
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blob.c: apk_blob_push_hexdump(), "const char *xd"
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apk_defines.h: APK_CACHE_CSUM_BYTES
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database.c: apk_repo_format_cache_index()
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"""
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binary = hashlib.sha1(url.encode("utf-8")).digest()
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xd = "0123456789abcdefghijklmnopqrstuvwxyz"
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csum_bytes = int(length / 2)
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ret = ""
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for i in range(csum_bytes):
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ret += xd[(binary[i] >> 4) & 0xf]
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ret += xd[binary[i] & 0xf]
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return ret
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def urls(args, user_repository=True, postmarketos_mirror=True, alpine=True):
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"""
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Get a list of repository URLs, as they are in /etc/apk/repositories.
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:param user_repository: add /mnt/pmbootstrap/packages
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:param postmarketos_mirror: add postmarketos mirror URLs
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:param alpine: add alpine mirror URLs
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:returns: list of mirror strings, like ["/mnt/pmbootstrap/packages",
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"http://...", ...]
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"""
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ret = []
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# Get mirrordirs from channels.cfg (postmarketOS mirrordir is the same as
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# the pmaports branch of the channel, no need to make it more complicated)
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channel_cfg = pmb.config.pmaports.read_config_channel(args)
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mirrordir_pmos = channel_cfg["branch_pmaports"]
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mirrordir_alpine = channel_cfg["mirrordir_alpine"]
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# Local user repository (for packages compiled with pmbootstrap)
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if user_repository:
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ret.append("/mnt/pmbootstrap/packages")
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# Upstream postmarketOS binary repository
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if postmarketos_mirror:
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for mirror in args.mirrors_postmarketos:
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# Remove "master" mirrordir to avoid breakage until bpo is adjusted
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# (build.postmarketos.org#63) and to give potential other users of
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# this flag a heads up.
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if mirror.endswith("/master"):
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logging.warning("WARNING: 'master' at the end of"
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" --mirror-pmOS is deprecated, the branch gets"
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" added automatically now!")
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mirror = mirror[:-1 * len("master")]
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ret.append(f"{mirror}{mirrordir_pmos}")
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# Upstream Alpine Linux repositories
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if alpine:
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directories = ["main", "community"]
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if mirrordir_alpine == "edge":
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directories.append("testing")
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for dir in directories:
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ret.append(f"{args.mirror_alpine}{mirrordir_alpine}/{dir}")
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return ret
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def apkindex_files(args, arch=None, user_repository=True, pmos=True,
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alpine=True):
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"""
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Get a list of outside paths to all resolved APKINDEX.tar.gz files for a
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specific arch.
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:param arch: defaults to native
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:param user_repository: add path to index of locally built packages
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:param pmos: add paths to indexes of postmarketos mirrors
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:param alpine: add paths to indexes of alpine mirrors
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:returns: list of absolute APKINDEX.tar.gz file paths
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"""
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if not arch:
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arch = pmb.config.arch_native
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ret = []
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# Local user repository (for packages compiled with pmbootstrap)
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if user_repository:
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channel = pmb.config.pmaports.read_config(args)["channel"]
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ret = [f"{args.work}/packages/{channel}/{arch}/APKINDEX.tar.gz"]
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# Resolve the APKINDEX.$HASH.tar.gz files
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for url in urls(args, False, pmos, alpine):
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ret.append(args.work + "/cache_apk_" + arch + "/APKINDEX." +
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hash(url) + ".tar.gz")
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return ret
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def update(args, arch=None, force=False, existing_only=False):
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"""
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Download the APKINDEX files for all URLs depending on the architectures.
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:param arch: * one Alpine architecture name ("x86_64", "armhf", ...)
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* None for all architectures
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:param force: even update when the APKINDEX file is fairly recent
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:param existing_only: only update the APKINDEX files that already exist,
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this is used by "pmbootstrap update"
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:returns: True when files have been downloaded, False otherwise
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"""
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# Skip in offline mode, only show once
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cache_key = "pmb.helpers.repo.update"
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if args.offline:
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if not pmb.helpers.other.cache[cache_key]["offline_msg_shown"]:
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logging.info("NOTE: skipping package index update (offline mode)")
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pmb.helpers.other.cache[cache_key]["offline_msg_shown"] = True
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return False
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# Architectures and retention time
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architectures = [arch] if arch else pmb.config.build_device_architectures
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retention_hours = pmb.config.apkindex_retention_time
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retention_seconds = retention_hours * 3600
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# Find outdated APKINDEX files. Formats:
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# outdated: {URL: apkindex_path, ... }
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# outdated_arches: ["armhf", "x86_64", ... ]
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outdated = {}
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outdated_arches = []
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for url in urls(args, False):
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for arch in architectures:
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# APKINDEX file name from the URL
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url_full = url + "/" + arch + "/APKINDEX.tar.gz"
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cache_apk_outside = args.work + "/cache_apk_" + arch
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apkindex = cache_apk_outside + "/APKINDEX." + hash(url) + ".tar.gz"
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# Find update reason, possibly skip non-existing or known 404 files
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reason = None
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if url_full in pmb.helpers.other.cache[cache_key]["404"]:
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# We already attempted to download this file once in this
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# session
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continue
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elif not os.path.exists(apkindex):
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if existing_only:
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continue
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reason = "file does not exist yet"
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elif force:
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reason = "forced update"
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elif pmb.helpers.file.is_older_than(apkindex, retention_seconds):
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reason = "older than " + str(retention_hours) + "h"
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if not reason:
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continue
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# Update outdated and outdated_arches
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logging.debug("APKINDEX outdated (" + reason + "): " + url_full)
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outdated[url_full] = apkindex
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if arch not in outdated_arches:
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outdated_arches.append(arch)
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# Bail out or show log message
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if not len(outdated):
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return False
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logging.info("Update package index for " + ", ".join(outdated_arches) +
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" (" + str(len(outdated)) + " file(s))")
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# Download and move to right location
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for (i, (url, target)) in enumerate(outdated.items()):
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pmb.helpers.cli.progress_print(args, i / len(outdated))
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temp = pmb.helpers.http.download(args, url, "APKINDEX", False,
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logging.DEBUG, True)
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if not temp:
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pmb.helpers.other.cache[cache_key]["404"].append(url)
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continue
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target_folder = os.path.dirname(target)
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if not os.path.exists(target_folder):
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pmb.helpers.run.root(args, ["mkdir", "-p", target_folder])
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pmb.helpers.run.root(args, ["cp", temp, target])
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pmb.helpers.cli.progress_flush(args)
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return True
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def alpine_apkindex_path(args, repo="main", arch=None):
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"""
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Get the path to a specific Alpine APKINDEX file on disk and download it if
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necessary.
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:param repo: Alpine repository name (e.g. "main")
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:param arch: Alpine architecture (e.g. "armhf"), defaults to native arch.
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:returns: full path to the APKINDEX file
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"""
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# Repo sanity check
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if repo not in ["main", "community", "testing", "non-free"]:
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raise RuntimeError("Invalid Alpine repository: " + repo)
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# Download the file
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arch = arch or pmb.config.arch_native
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update(args, arch)
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# Find it on disk
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channel_cfg = pmb.config.pmaports.read_config_channel(args)
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repo_link = f"{args.mirror_alpine}{channel_cfg['mirrordir_alpine']}/{repo}"
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cache_folder = args.work + "/cache_apk_" + arch
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return cache_folder + "/APKINDEX." + hash(repo_link) + ".tar.gz"
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