forked from Mirror/pmbootstrap
c730326d3c
* Ignore `>`, `<`, `=` and `!` operators, when they are specified in
the dependencies. This was the desired behavior before, but it was
not implemented correctly (so it wouldn't ignore them everywhere).
Of course the real fix would be to honor these operators like apk
does. But this isn't feasible right now, and it should work for
most, if not all, our use-cases. I have documented this in the wiki
under build internals and if we happen to need correct operator
handling, we should do it then.
Minor other changes:
* `pmbootstrap parse_apkindex`: support optional package parameter to
only show the parsed content for one package.
* Support building most python APKBUILDs by replacing ${pkgname#py-}
properly
273 lines
9 KiB
Python
273 lines
9 KiB
Python
"""
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Copyright 2017 Oliver Smith
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This file is part of pmbootstrap.
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pmbootstrap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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pmbootstrap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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import distutils.version
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import logging
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import os
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import tarfile
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import pmb.chroot.apk
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import pmb.helpers.repo
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def compare_version(a_str, b_str):
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"""
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http://stackoverflow.com/a/11887885
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LooseVersion behaves just like apk's version check, at least
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for all package versions, that have "-r".
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:returns:
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(a < b): -1
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(a == b): 0
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(a > b): 1
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"""
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if a_str is None:
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a_str = "0"
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if b_str is None:
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b_str = "0"
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a = distutils.version.LooseVersion(a_str)
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b = distutils.version.LooseVersion(b_str)
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if a < b:
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return -1
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if a == b:
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return 0
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return 1
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def parse_next_block(args, path, lines, start):
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"""
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Parse the next block in an APKINDEX.
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:param path: to the APKINDEX.tar.gz
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:param start: current index in lines, gets increased in this
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function. Wrapped into a list, so it can be modified
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"by reference". Example: [5]
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:param lines: all lines from the "APKINDEX" file inside the archive
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:returns: a dictionary with the following structure:
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{ "pkgname": "postmarketos-mkinitfs",
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"version": "0.0.4-r10",
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"depends": ["busybox-extras", "lddtree", ... ],
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"provides": ["mkinitfs=0.0.1"],
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}
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:returns: None, when there are no more blocks
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"""
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# Parse until we hit an empty line or end of file
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ret = {}
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mapping = {
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"P": "pkgname",
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"V": "version",
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"D": "depends",
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"p": "provides",
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"t": "timestamp"
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}
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end_of_block_found = False
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for i in range(start[0], len(lines)):
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# Check for empty line
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start[0] = i + 1
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line = lines[i]
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if not isinstance(line, str):
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line = line.decode()
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if line == "\n":
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end_of_block_found = True
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break
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# Parse keys from the mapping
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for letter, key in mapping.items():
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if line.startswith(letter + ":"):
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if key in ret:
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raise RuntimeError(
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"Key " + key + " (" + letter + ":) specified twice"
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" in block: " + str(ret) + ", file: " + path)
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ret[key] = line[2:-1]
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# Format and return the block
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if end_of_block_found:
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# Check for required keys
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for key in ["pkgname", "version", "timestamp"]:
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if key not in ret:
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raise RuntimeError("Missing required key '" + key +
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"' in block " + str(ret) + ", file: " + path)
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# Format optional lists
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for key in ["provides", "depends"]:
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if key in ret and ret[key] != "":
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# Ignore all operators for now
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values = ret[key].split(" ")
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ret[key] = []
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for value in values:
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if value.startswith("!"):
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continue
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for operator in [">", "=", "<"]:
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if operator in value:
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value = value.split(operator)[0]
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break
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ret[key].append(value)
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else:
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ret[key] = []
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return ret
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# No more blocks
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elif ret != {}:
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raise RuntimeError("Last block in " + path + " does not end"
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" with a new line! Delete the file and"
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" try again. Last block: " + str(ret))
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return None
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def parse_add_block(path, strict, ret, block, pkgname=None):
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"""
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Add one block to the return dictionary of parse().
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:param path: to the APKINDEX.tar.gz
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:param strict: When set to True, only allow one entry per pkgname.
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In case there are two, raise an exception.
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When set to False, and there are multiple entries
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for one pkgname, it uses the latest one.
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:param ret: dictionary of all packages in the APKINDEX, that is
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getting built right now. This function will extend it.
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:param block: return value from parse_next_block().
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:param pkgname: defaults to the real pkgname, could be an alias
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from the "provides" list.
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:param version: defaults to the real version, could be a value
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from the "provides" list.
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"""
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# Defaults
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if not pkgname:
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pkgname = block["pkgname"]
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# Handle duplicate entries
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if pkgname in ret:
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if strict:
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raise RuntimeError("Multiple blocks for " + pkgname +
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" in " + path)
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# Ignore the block, if the block we already have has a higher
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# version
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version_old = ret[pkgname]["version"]
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version_new = block["version"]
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if compare_version(version_old, version_new) == 1:
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return
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# Add it to the result set
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ret[pkgname] = block
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def parse(args, path, strict=False):
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"""
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Parse an APKINDEX.tar.gz file, and return its content as dictionary.
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:param strict: When set to True, only allow one entry per pkgname.
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In case there are two, raise an exception.
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When set to False, and there are multiple entries
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for one pkgname, it uses the latest one.
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:returns: a dictionary with the following structure:
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{ "postmarketos-mkinitfs":
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{
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"pkgname": "postmarketos-mkinitfs"
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"version": "0.0.4-r10",
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"depends": ["busybox-extras", "lddtree", ...],
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"provides": ["mkinitfs=0.0.1"]
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}, ...
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}
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"""
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# Try to get a cached result first
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lastmod = os.path.getmtime(path)
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if path in args.cache["apkindex"]:
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cache = args.cache["apkindex"][path]
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if cache["lastmod"] == lastmod:
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return cache["ret"]
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# Read all lines
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if tarfile.is_tarfile(path):
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with tarfile.open(path, "r:gz") as tar:
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with tar.extractfile(tar.getmember("APKINDEX")) as handle:
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lines = handle.readlines()
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else:
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with open(path, "r", encoding="utf-8") as handle:
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lines = handle.readlines()
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# Parse the whole APKINDEX file
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ret = {}
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start = [0]
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while True:
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block = parse_next_block(args, path, lines, start)
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if not block:
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break
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# Add the next package and all aliases
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parse_add_block(path, strict, ret, block)
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if "provides" in block:
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for alias in block["provides"]:
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parse_add_block(path, strict, ret, block, alias)
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# Update the cache
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args.cache["apkindex"][path] = {"lastmod": lastmod, "ret": ret}
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return ret
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def read(args, package, path, must_exist=True):
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"""
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Get information about a single package from an APKINDEX.tar.gz file.
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:param path: Path to APKINDEX.tar.gz, defaults to $WORK/APKINDEX.tar.gz
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:param package: The package of which you want to read the properties.
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:param must_exist: When set to true, raise an exception when the package is
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missing in the index, or the index file was not found.
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:returns: {"pkgname": ..., "version": ..., "depends": [...]}
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When the package appears multiple times in the APKINDEX, this
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function returns the attributes of the latest version.
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"""
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# Verify APKINDEX path
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if not os.path.exists(path):
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if not must_exist:
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return None
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raise RuntimeError("File not found: " + path)
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# Parse the APKINDEX
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apkindex = parse(args, path)
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if package not in apkindex:
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if must_exist:
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raise RuntimeError("Package '" + package +
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"' not found in " + path)
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else:
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return None
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return apkindex[package]
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def read_any_index(args, package, arch=None):
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"""
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Get information about a single package from any APKINDEX.tar.gz.
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:param arch: defaults to native architecture
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:returns: the same format as read()
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"""
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if not arch:
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arch = args.arch_native
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# Return first match
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for index in pmb.helpers.repo.apkindex_files(args, arch):
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index_data = read(args, package, index, False)
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logging.verbose("Search for " + package + " in " + index +
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" - result: " + str(index_data))
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if index_data:
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return index_data
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logging.verbose("No match found in any APKINDEX.tar.gz!")
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return None
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