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"""
A package source module to import packages from configured portage repositories
"""
from functools import cmp_to_key
from os import path
from portage.versions import vercmp
from pomu.package import Package
from pomu.repo.repo import portage_repos, portage_repo_path
from pomu.source import dispatcher
from pomu.util.pkg import cpv_split, ver_str
from pomu.util.portage import repo_pkgs
from pomu.util.result import Result
class PortagePackage():
"""A class to represent a portage package"""
__name__ = 'portage'
def __init__(self, repo, category, name, version, slot='0'):
self.repo = repo
self.category = category
self.name = name
self.version = version
self.slot = slot
def fetch(self):
return Package(self.name, portage_repo_path(self.repo), self,
category=self.category, version=self.version, slot=self.slot,
files=[path.join(self.category, self.name, 'metadata.xml'),
path.join(self.category, self.name, self.name + '-' + self.version + '.ebuild')])
def write_meta(self, pkgdir):
with open(path.join(pkgdir, 'PORTAGE_DATA'), 'w') as f:
f.write(self.repo + '\n')
f.write(self.category + '\n')
f.write(self.name + '\n')
f.write(self.version + '\n')
f.write(self.slot + '\n')
@staticmethod
def from_data_dir(pkgdir):
try:
lines = [x.strip() for x in open(path.join(pkgdir, 'PORTAGE_DATA'), 'r')]
except:
return Result.Err('Could not read data file')
if len(lines) < 5:
return Result.Err('Invalid data provided')
res = PortagePackage()
res.repo, res.category, res.name, res.version, res.slot, *_ = lines
if sanity_check(res.repo, res.category, res.name, None, None, None, res.slot, ver=res.version):
return Result.Ok(res)
return Result.Err('Package {} not found'.format(res))
def __str__(self):
return '{}/{}-{}{}::{}'.format(self.category, self.name, self.version,
'' if self.slot == '0' else ':' + self.slot, self.repo)
@dispatcher.source
class PortageSource():
"""The source module responsible for fetching portage packages"""
@dispatcher.handler(priority=5)
def parse_spec(uri, repo=None):
# dev-libs/openssl-0.9.8z_p8-r100:0.9.8::gentoo
pkg, _, repo_ = uri.partition('::') # portage repo may be specified on the rhs as well
if repo_:
repo = repo_
# dev-libs/openssl-0.9.8z_p8-r100:0.9.8
pkg, _, slot = uri.partition(':') # slot may be omitted
if not slot:
slot = None
category, name, vernum, suff, rev = cpv_split(pkg)
res = sanity_check(repo, category, name, vernum, suff, rev, slot)
if not res:
return Result.Err()
return Result.Ok(res)
@dispatcher.handler()
def parse_full(uri):
# portage/gentoo:dev-libs/openssl-0.9.8z_p8-r100:0.9.8::gentoo
if not uri.startswith('portage'):
return Result.Err()
uri = uri[len('portage'):]
# gentoo:dev-libs/openssl-0.9.8z_p8-r100:0.9.8::gentoo
if uri.startswith('/'): # repo may be omitted
repo, _, uri_ = uri[1:].partition(':')
if uri_ == uri[1:]:
return Result.Err()
uri = uri_
elif uri.startswith(':'):
repo = None
uri = uri[1:]
return PortageSource.parse_spec(uri, repo)
@dispatcher.handler(priority=4)
def parse_repo_ebuild(uri):
if not path.exists(uri):
return Result.Err()
uri = path.abspath(uri)
prefixes = [(x, portage_repo_path(x)) for x in portage_repos()]
for repo, repo_path in prefixes:
repo_path = repo_path.rstrip('/') + '/'
if uri.startswith(repo):
if path.isfile(uri):
if not uri.endswith('.ebuild'):
return Result.Err()
_, name, v1, v2, v3 = cpv_split(path.basename(uri))
ver = ver_str(v1, v2, v3)
dircomps = path.dirname(uri)[len(repo_path):].split('/')
if len(dircomps) != 2:
return Result.Err()
return PortageSource.parse_spec('{}/{}-{}::{}'.format(dircomps[0], name, ver, repo))
elif path.isdir(uri):
dircomps = path.dirname(uri)[len(repo_path):].split('/')
if len(dircomps) != 2:
return Result.Err()
return PortageSource.parse_spec('{}/{}'.format(*dircomps))
return Result.Err()
@classmethod
def fetch_package(cls, pkg):
return pkg.fetch()
@classmethod
def from_meta_dir(cls, metadir):
return PortagePackage.from_data_dir(cls, metadir)
def sanity_check(repo, category, name, vernum, suff, rev, slot, ver=None):
"""
Checks whether a package descriptor is valid and corresponds
to a package in a configured portage repository
"""
if not name:
return False
if repo and repo not in list(portage_repos()):
return False
if not ver:
if (rev or suff) and not vernum:
return False
if vernum:
ver = ver_str(vernum, suff, rev)
else:
ver = None
pkgs = repo_pkgs(repo, category, name, ver, slot)
if not pkgs:
return False
pkg = sorted(pkgs, key=cmp_to_key(lambda x,y:vercmp(x[3],y[3])), reverse=True)[0]
return PortagePackage(*pkg)
__all__ = [PortagePackage, PortageSource]
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