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# R Overlay -- Manifest creation for ebuilds
# Copyright 2006-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# TODO (in future): could use portage api directly, namely
# '/usr/lib/portage/pym/portage/package/ebuild/doebuild.py'
# instead of using '/usr/bin/ebuild'
import os
import re
import copy
import logging
import subprocess
from roverlay import config, util
class _ManifestCreation ( object ):
"""This is the base class for Manifest file creation."""
static_instance = None
def __init__ ( self ):
self.logger = logging.getLogger ( 'ManifestCreation' )
# --- end of __init__ (...) ---
def create_for ( self, package_info ):
"""Creates a Manifest file for the ebuild of the given package_info."""
raise Exception ( "method stub" )
# --- end of create_for (...) ---
@classmethod
def do ( cls, package_info ):
"""Class/static access to Manifest creation."""
if cls.static_instance is None:
cls.static_instance = cls()
return cls.static_instance.create_for ( package_info )
# --- end of do (...) ---
class ExternalManifestCreation ( _ManifestCreation ):
"""This class implements Manifest creation using the low level ebuild
interface, ebuild(1), which is called in a filtered environment.
"""
def __init__ ( self ):
super ( ExternalManifestCreation, self ) . __init__ ()
self.manifest_env = ManifestEnv ( filter_env=True )
# ebuild <ebuild_file> <target>, where target is:
self.ebuild_tgt = config.get ( 'TOOLS.EBUILD.target', 'manifest' )
self.ebuild_prog = config.get ( 'TOOLS.EBUILD.prog', '/usr/bin/ebuild' )
# --- end of __init__ (...) ---
def create_for ( self, package_info ):
"""See ManifestCreation.create_for.
Calls ebuild, returns True on success else False.
raises: *passes Exceptions from failed config lookups
"""
my_env = self.manifest_env [ package_info ['distdir'] ]
ebuild_file = package_info ['ebuild_file']
ebuild_call = subprocess.Popen (
(
self.ebuild_prog,
ebuild_file,
self.ebuild_tgt
),
stdin=None,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=my_env
)
output = ebuild_call.communicate()
# necessary? (probably not, FIXME/TODO)
ebuild_call.wait()
# log stdout?
#for line in util.pipe_lines ( output [0] ):
# LOGGER.debug ( line )
#for line in util.pipe_lines ( output [0] ): print ( line )
# log stderr
for line in util.pipe_lines ( output [1], use_filter=True ):
self.logger.warning ( line )
if ebuild_call.returncode == 0:
self.logger.debug ( "Manifest written." )
return True
else:
self.logger.error (
"Couldn't create Manifest for %s! Return code was %i."
% ( ebuild_file, ebuild_call.returncode )
)
return False
# --- end of create_for (...) ---
class ManifestEnv ( object ):
"""per-repo environment container for Manifest creation using ebuild."""
def __init__ ( self, filter_env=True ):
"""Initializes a ManifestEnv.
arguments:
* filter_env -- if True: start with an empty env and copy vars
from os.environ selectively
else : start with os.environ as env
"""
self.filter_env = filter_env
self._manenv = dict()
self.logger = logging.getLogger ( 'ManifestEnv' )
self._common_env = None
# --- end of __init__ (...) ---
def get_env ( self, repo_dir ):
"""Returns an env dict for repo_dir.
arguments:
* repo_dir --
"""
if not repo_dir in self._manenv:
repo_env = self._get_common_manifest_env()
repo_env ['DISTDIR'] = repo_dir
self._manenv [repo_dir] = repo_env
return self._manenv [repo_dir]
# --- end of get_env (...) ---
# x = ManifestEnv(); env = x [<sth>] etc.
__getitem__ = get_env
# ---
def _get_common_manifest_env ( self, noret=False ):
"""Creates an environment suitable for an
"ebuild <ebuild> digest|manifest" call (or uses an already existing env).
Returns a shallow copy of this env which can then be locally modified
(setting DISTDIR).
arguments:
* noret -- do not return copied env if True
"""
if self._common_env is None:
if self.filter_env:
# selectively import os.environ
# FIXME: keep EBUILD_DEFAULT_OPTS?
our_env = util.keepenv (
( 'PATH', '' ),
'LANG',
'PWD',
'EBUILD_DEFAULT_OPTS'
)
else:
# copy os.environ
our_env = dict ( os.environ )
# -- common env part
# set FEATURES
# * digest -- needed? (works without it)
# * assume-digests --
# * unknown-features-warn -- should FEATURES ever change
#
# * noauto -- should prevent ebuild from adding additional actions,
# it still tries to download source packages, which is just wrong
# here 'cause it is expected that the R package file exists when
# calling this function, so FETCHCOMMAND/RESUMECOMMAND will be set
# to /bin/true if possible.
#
# * distlocks -- disabled if FETCHCOMMAND/RESUMECOMMAND set to no-op
#
our_env ['FEATURES'] = \
"noauto digest assume-digests unknown-features-warn"
# try to prevent src fetching
fetch_nop = util.sysnop (
nop_returns_success=True,
format_str="%s \${DISTDIR} \${FILE} \${URI}"
)
if not fetch_nop is None:
self.logger.debug (
"%s disables/replaces FETCHCOMMAND,RESUMECOMMAND."
% fetch_nop [0]
)
our_env ['FETCHCOMMAND'] = fetch_nop [1]
our_env ['RESUMECOMMAND'] = fetch_nop [1]
our_env ['FEATURES'] += " -distlocks"
# set PORDIR_OVERLAY
# ! FIXME the overlay module does not enforce usage of this config key
our_env ['PORTDIR_OVERLAY'] = config.get_or_fail (
[ 'OVERLAY', 'dir' ]
)
self._common_env = our_env
# -- end if
if noret:
return None
else:
return copy.copy ( self._common_env )
# --- end of _get_common_manifest_env (...) ---
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