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# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
from _emerge.SubProcess import SubProcess
import sys
from portage.cache.mappings import slot_dict_class
import portage
portage.proxy.lazyimport.lazyimport(globals(),
'portage.package.ebuild._metadata_invalid:eapi_invalid',
)
from portage import os
from portage import _encodings
from portage import _unicode_decode
from portage import _unicode_encode
from portage.dep import extract_unpack_dependencies
from portage.eapi import eapi_has_automatic_unpack_dependencies
import fcntl
import io
class EbuildMetadataPhase(SubProcess):
"""
Asynchronous interface for the ebuild "depend" phase which is
used to extract metadata from the ebuild.
"""
__slots__ = ("cpv", "eapi_supported", "ebuild_hash", "fd_pipes",
"metadata", "portdb", "repo_path", "settings", "write_auxdb") + \
("_eapi", "_eapi_lineno", "_raw_metadata",)
_file_names = ("ebuild",)
_files_dict = slot_dict_class(_file_names, prefix="")
def _start(self):
ebuild_path = self.ebuild_hash.location
with io.open(_unicode_encode(ebuild_path,
encoding=_encodings['fs'], errors='strict'),
mode='r', encoding=_encodings['repo.content'],
errors='replace') as f:
self._eapi, self._eapi_lineno = portage._parse_eapi_ebuild_head(f)
parsed_eapi = self._eapi
if parsed_eapi is None:
parsed_eapi = "0"
if not parsed_eapi:
# An empty EAPI setting is invalid.
self._eapi_invalid(None)
self.returncode = 1
self._async_wait()
return
self.eapi_supported = portage.eapi_is_supported(parsed_eapi)
if not self.eapi_supported:
self.metadata = {"EAPI": parsed_eapi}
self.returncode = os.EX_OK
self._async_wait()
return
settings = self.settings
settings.setcpv(self.cpv)
settings.configdict['pkg']['EAPI'] = parsed_eapi
debug = settings.get("PORTAGE_DEBUG") == "1"
master_fd = None
slave_fd = None
fd_pipes = None
if self.fd_pipes is not None:
fd_pipes = self.fd_pipes.copy()
else:
fd_pipes = {}
null_input = open('/dev/null', 'rb')
fd_pipes.setdefault(0, null_input.fileno())
fd_pipes.setdefault(1, sys.__stdout__.fileno())
fd_pipes.setdefault(2, sys.__stderr__.fileno())
# flush any pending output
stdout_filenos = (sys.__stdout__.fileno(), sys.__stderr__.fileno())
for fd in fd_pipes.values():
if fd in stdout_filenos:
sys.__stdout__.flush()
sys.__stderr__.flush()
break
self._files = self._files_dict()
files = self._files
master_fd, slave_fd = os.pipe()
fcntl.fcntl(master_fd, fcntl.F_SETFL,
fcntl.fcntl(master_fd, fcntl.F_GETFL) | os.O_NONBLOCK)
# FD_CLOEXEC is enabled by default in Python >=3.4.
if sys.hexversion < 0x3040000:
try:
fcntl.FD_CLOEXEC
except AttributeError:
pass
else:
fcntl.fcntl(master_fd, fcntl.F_SETFD,
fcntl.fcntl(master_fd, fcntl.F_GETFD) | fcntl.FD_CLOEXEC)
fd_pipes[slave_fd] = slave_fd
settings["PORTAGE_PIPE_FD"] = str(slave_fd)
self._raw_metadata = []
files.ebuild = master_fd
self.scheduler.add_reader(files.ebuild, self._output_handler)
self._registered = True
retval = portage.doebuild(ebuild_path, "depend",
settings=settings, debug=debug,
mydbapi=self.portdb, tree="porttree",
fd_pipes=fd_pipes, returnpid=True)
settings.pop("PORTAGE_PIPE_FD", None)
os.close(slave_fd)
null_input.close()
if isinstance(retval, int):
# doebuild failed before spawning
self.returncode = retval
self._async_wait()
return
self.pid = retval[0]
def _output_handler(self):
while True:
buf = self._read_buf(self._files.ebuild)
if buf is None:
break # EAGAIN
elif buf:
self._raw_metadata.append(buf)
else: # EIO/POLLHUP
if self.pid is None:
self._unregister()
self._async_wait()
else:
self._async_waitpid()
break
def _unregister(self):
if self._files is not None:
self.scheduler.remove_reader(self._files.ebuild)
SubProcess._unregister(self)
def _async_waitpid_cb(self, *args, **kwargs):
"""
Override _async_waitpid_cb to perform cleanup that is
not necessarily idempotent.
"""
SubProcess._async_waitpid_cb(self, *args, **kwargs)
# self._raw_metadata is None when _start returns
# early due to an unsupported EAPI
if self.returncode == os.EX_OK and \
self._raw_metadata is not None:
metadata_lines = _unicode_decode(b''.join(self._raw_metadata),
encoding=_encodings['repo.content'],
errors='replace').splitlines()
metadata_valid = True
if len(portage.auxdbkeys) != len(metadata_lines):
# Don't trust bash's returncode if the
# number of lines is incorrect.
metadata_valid = False
else:
metadata = dict(zip(portage.auxdbkeys, metadata_lines))
parsed_eapi = self._eapi
if parsed_eapi is None:
parsed_eapi = "0"
self.eapi_supported = \
portage.eapi_is_supported(metadata["EAPI"])
if (not metadata["EAPI"] or self.eapi_supported) and \
metadata["EAPI"] != parsed_eapi:
self._eapi_invalid(metadata)
metadata_valid = False
if metadata_valid:
# Since we're supposed to be able to efficiently obtain the
# EAPI from _parse_eapi_ebuild_head, we don't write cache
# entries for unsupported EAPIs.
if self.eapi_supported:
if metadata.get("INHERITED", False):
metadata["_eclasses_"] = \
self.portdb.repositories.get_repo_for_location(
self.repo_path).eclass_db.get_eclass_data(
metadata["INHERITED"].split())
else:
metadata["_eclasses_"] = {}
metadata.pop("INHERITED", None)
if eapi_has_automatic_unpack_dependencies(metadata["EAPI"]):
repo = self.portdb.repositories.get_name_for_location(self.repo_path)
unpackers = self.settings.unpack_dependencies.get(repo, {}).get(metadata["EAPI"], {})
unpack_dependencies = extract_unpack_dependencies(metadata["SRC_URI"], unpackers)
if unpack_dependencies:
metadata["DEPEND"] += (" " if metadata["DEPEND"] else "") + unpack_dependencies
# If called by egencache, this cache write is
# undesirable when metadata-transfer is disabled.
if self.write_auxdb is not False:
self.portdb._write_cache(self.cpv,
self.repo_path, metadata, self.ebuild_hash)
else:
metadata = {"EAPI": metadata["EAPI"]}
self.metadata = metadata
else:
self.returncode = 1
def _eapi_invalid(self, metadata):
repo_name = self.portdb.getRepositoryName(self.repo_path)
if metadata is not None:
eapi_var = metadata["EAPI"]
else:
eapi_var = None
eapi_invalid(self, self.cpv, repo_name, self.settings,
eapi_var, self._eapi, self._eapi_lineno)
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