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# R overlay -- simple dependency rules
# -*- coding: utf-8 -*-
# Copyright (C) 2012 André Erdmann <dywi@mailerd.de>
# Distributed under the terms of the GNU General Public License;
# either version 2 of the License, or (at your option) any later version.
"""simple dependency rules
This module provides 4 simple dependency rules classes
* SimpleDependencyRule
* SimpleIgnoreDependencyRule
* SimpleFuzzyDependencyRule
* SimpleFuzzyIgnoreDependencyRule
(TODO NOTE: could describe rule matching here)
"""
__all__ = (
'SimpleIgnoreDependencyRule', 'SimpleDependencyRule',
'SimpleFuzzyDependencyRule', 'SimpleFuzzyIgnoreDependencyRule'
)
import roverlay.strutil
import roverlay.depres.depenv
from roverlay.depres.simpledeprule.util import \
RuleFileSyntaxError, get_slot_restrict, get_slot_parser
from roverlay.depres.simpledeprule.abstractrules import \
SimpleRule, FuzzySimpleRule
class RuleConstructor ( object ):
def __init__ ( self, eapi ):
##self.eapi = eapi
self.kw_ignore = SimpleIgnoreDependencyRule.RULE_PREFIX
self.kw_fuzzy = SimpleFuzzyDependencyRule.RULE_PREFIX
self.kw_fuzzy_ignore = SimpleFuzzyIgnoreDependencyRule.RULE_PREFIX
# --- end of __init__ (...) ---
def lookup ( self, keyworded_str ):
get_kwless = lambda : keyworded_str[1:].lstrip() or None
kw = keyworded_str[0]
if kw == self.kw_ignore:
return ( SimpleIgnoreDependencyRule, get_kwless(), {} )
elif kw == self.kw_fuzzy_ignore:
return ( SimpleFuzzyIgnoreDependencyRule, get_kwless(), {} )
elif kw == self.kw_fuzzy:
## syntax
## ~<cat>/<pkg>[:[<slot option>]]*
## where slot option is any of
## * slot restrict (range, list)
## * "with version", "open" ("*" and "=" slot operators)
## * relevant version parts ("1.2.3.4" => "1" if 1, "1.2" if 2, ...)
## * relevant subslot version parts ("1.2.3.4" => <SLOT>/<SUBSLOT?>)
## * slot operator ("=")
kwless = get_kwless()
line_components = kwless.split ( ':' )
if len ( line_components ) < 2:
# non-slot fuzzy rule
return ( SimpleFuzzyDependencyRule, kwless, {} )
else:
kwargs = dict()
lc_iter = iter ( line_components )
# drop first item as it's the resolving string and not an option
next ( lc_iter )
for opt_str in lc_iter:
opt, has_value, value = opt_str.partition ( '=' )
if not opt_str:
# empty
pass
elif opt == 'default':
kwargs ['slot_mode'] = 0
elif opt == 'with_version' or opt == '+v':
kwargs ['slot_mode'] = 1
elif opt == 'open':
kwargs ['slot_mode'] = 2
elif ( opt == 'restrict' or opt == 'r' ) and value:
kwargs ['slot_restrict'] = get_slot_restrict ( value )
elif ( opt == 'slotparts' or opt == 's' ) and value:
kwargs ['slotparts'] = get_slot_parser ( value )
elif ( opt == 'subslotparts' or opt == '/' ) and value:
kwargs ['subslotparts'] = get_slot_parser ( value )
elif opt_str[0] == '/' and not has_value:
kwargs ['subslotparts'] = get_slot_parser ( opt_str[1:] )
# elif opt == 'operator' and value:
# # unsafe, could be used to inject "$(rm -rf /)" etc.
# kwargs ['slot_operator'] = value
elif opt == 'wide_match':
if not has_value:
kwargs ['allow_wide_match'] = True
else:
kwargs ['allow_wide_match'] = bool (
roverlay.strutil.str_to_bool ( value )
)
elif opt == '*':
kwargs ['slot_operator'] = '*'
elif not opt and has_value:
# "="
kwargs ['slot_operator'] = '='
pass
else:
raise RuleFileSyntaxError (
"cannot parse option {!r} from {!r}".format (
opt_str, kwless
)
)
# -- end for lc_iter
if (
kwargs.get ( 'slot_operator' ) == '*'
and kwargs.get ( 'slot_mode' ) != 2
):
raise RuleFileSyntaxError (
"The '*' slot operator needs an 'open' rule."
)
else:
return (
SimpleFuzzySlotDependencyRule, line_components[0], kwargs
)
# -- end if line_components
else:
return ( SimpleDependencyRule, keyworded_str, {} )
# --- end of lookup (...) ---
# --- end of RuleConstructor ---
class SimpleIgnoreDependencyRule ( SimpleRule ):
RULE_PREFIX = '!'
def __init__ ( self, priority=50, resolving_package=None, **kw ):
super ( SimpleIgnoreDependencyRule, self ) . __init__ (
logger_name = 'IGNORE_DEPS',
resolving_package=None,
priority=50,
**kw
)
# --- end of SimpleIgnoreDependencyRule ---
class SimpleDependencyRule ( SimpleRule ):
def __init__ ( self, priority=70, resolving_package=None, **kw ):
"""Initializes a SimpleDependencyRule. This is
a SimpleIgnoreDependencyRule extended by a portage package string.
arguments:
* resolving package --
* dep_str --
* priority --
"""
super ( SimpleDependencyRule, self ) . __init__ (
priority=priority,
logger_name=resolving_package,
resolving_package=resolving_package,
**kw
)
# --- end of __init__ (...) ---
# --- end of SimpleDependencyRule ---
class SimpleFuzzyIgnoreDependencyRule ( FuzzySimpleRule ):
RULE_PREFIX = '%'
def __init__ ( self, priority=51, resolving_package=None, **kw ):
super ( SimpleFuzzyIgnoreDependencyRule, self ) . __init__ (
priority=priority,
resolving_package=resolving_package,
logger_name = 'FUZZY.IGNORE_DEPS',
**kw
)
def handle_version_relative_match ( self, *args, **kwargs ):
raise Exception ( "should-be unreachable code" )
# --- end of handle_version_relative_match (...) ---
# --- end of SimpleFuzzyIgnoreDependencyRule ---
class SimpleFuzzyDependencyRule ( FuzzySimpleRule ):
RULE_PREFIX = '~'
def __init__ ( self, priority=72, resolving_package=None, **kw ):
super ( SimpleFuzzyDependencyRule, self ) . __init__ (
priority=priority,
resolving_package=resolving_package,
logger_name = 'FUZZY.' + resolving_package,
**kw
)
# --- end of __init__ (...) ---
def handle_version_relative_match ( self, dep_env, fuzzy ):
ver_pkg = self.resolving_package + '-' + fuzzy ['version']
vmod_str = fuzzy ['version_modifier']
vmod = fuzzy ['vmod']
#if vmod & dep_env.VMOD_NOT:
if vmod == dep_env.VMOD_NE:
# package matches, but specific version is forbidden
# ( !<package>-<specific verion> <package> )
return "( !={vres} {res} )".format (
vres=ver_pkg, res=self.resolving_package
)
else:
# std vmod: >=, <=, =, <, >
return vmod_str + ver_pkg
# --- end of handle_version_relative_match (...) ---
# --- end of SimpleFuzzyDependencyRule ---
class SimpleFuzzySlotDependencyRule ( FuzzySimpleRule ):
# 2 slot variants
# "slot only": resolve dep_str as <cat>/<pkg>:<slot>
# "combined": resolve dep_str as <vmod><cat>/<pkg>-<ver>:<slot>
# FMT_DICT = {
# 'slot' : '{slot}',
# }
#RULE_PREFIX = '~'
RULE_PREFIX = SimpleFuzzyDependencyRule.RULE_PREFIX
# version relation operators that should never be matched in slot dep rules
# (bitmask)
VMOD_BASE_DENY_MASK = roverlay.depres.depenv.DepEnv.VMOD_NOT
# operators that should not be matched in nonwide mode (bitmask)
# - in addition to the base mask -
VMOD_WIDE_DENY_MASK = roverlay.depres.depenv.DepEnv.VMOD_GT
def __init__ ( self,
priority = 71,
resolving_package = None,
slot_mode = None,
slot_restrict = None,
slotparts = None,
subslotparts = None,
slot_operator = None,
allow_wide_match = None,
**kw
):
super ( SimpleFuzzySlotDependencyRule, self ) . __init__ (
priority=priority,
resolving_package = resolving_package,
logger_name = 'FUZZY_SLOT.' + resolving_package,
**kw
)
self.mode = 0 if slot_mode is None else slot_mode
self.slot_restrict = slot_restrict
self.slot_operator = slot_operator
self.slotparts = (
get_slot_parser ("0") if slotparts is None else slotparts
)
self.subslotparts = subslotparts
self.allow_wide_match = allow_wide_match
self.vmod_mask = self.VMOD_BASE_DENY_MASK
if not allow_wide_match:
self.vmod_mask |= self.VMOD_WIDE_DENY_MASK
if self.mode == 0:
# "default"
self._resolving_fmt = self.resolving_package + ':{slot}'
if self.slot_operator:
self._resolving_fmt += self.slot_operator
elif self.mode == 1:
# "with version"
self._resolving_fmt = (
'{vmod}' + self.resolving_package + '-{version}:{slot}'
)
if self.slot_operator:
self._resolving_fmt += self.slot_operator
elif self.mode == 2:
# "open" slot
if not self.slot_operator:
self.slot_operator = '='
del self.slot_restrict
self._orig_resolving_package = self.resolving_package
self.resolving_package += ':' + self.slot_operator
else:
raise Exception (
"unknown fuzzy slot rule mode {}".format ( self.mode )
)
if self.is_selfdep:
raise NotImplementedError ( "fuzzy slot rule must not be a selfdep." )
# --- end of __init__ (...) ---
def noexport ( self ):
del self.slot_operator
del self.allow_wide_match
if self.slot_restrict:
self.slot_restrict.noexport()
# --- end of noexport (...) ---
def get_resolving_str ( self ):
def gen_opts():
if self.allow_wide_match:
yield "wide_match"
# yield "vmod_mask={:#x}".format (
# self.vmod_mask & ~self.VMOD_BASE_DENY_MASK
# )
if self.mode == 2:
yield "open"
else:
if self.mode == 1:
yield "with_version"
if self.slot_restrict:
yield "restrict=" + str ( self.slot_restrict )
if self.slotparts and (
not hasattr ( self.slotparts, '_index' )
or self.slotparts._index != 0
):
yield "s=" + str ( self.slotparts )
if self.subslotparts:
yield "/" + str ( self.subslotparts )
# -- end if
if self.slot_operator:
yield self.slot_operator
return "{prefix}{resolv}:{opts}".format (
prefix = self.RULE_PREFIX,
resolv = (
self._orig_resolving_package
if hasattr ( self, '_orig_resolving_package' )
else self.resolving_package
),
opts = ':'.join ( gen_opts() )
)
# --- end of get_resolving_str (...) ---
def handle_version_relative_match ( self, dep_env, fuzzy ):
def get_slotted_result ( dep_env, fuzzy, vmod ):
slot_str = None
vslot_str = None
slot = self.slotparts.get_slot ( fuzzy )
if slot is not None:
if self.subslotparts:
subslot = self.subslotparts.get_slot ( fuzzy )
if subslot is not None:
slot_str = slot + '/' + subslot
vslot_str = (
self.slotparts.calculate_slot ( fuzzy, slot )
+ '/'
+ self.subslotparts.calculate_slot ( fuzzy, subslot )
)
else:
vslot_str = self.slotparts.calculate_slot ( fuzzy, slot )
slot_str = slot
if slot_str and (
not self.slot_restrict
or self.slot_restrict.accepts ( vslot_str )
):
return self._resolving_fmt.format (
slot = slot_str,
version = fuzzy ['version'],
vmod = fuzzy ['version_modifier']
)
# -- end if <accepted slot>
# -- end if <have slot>
# explicit return
return None
# --- end of get_slot_result (...) ---
res = False
vmod = fuzzy ['vmod']
if vmod & self.vmod_mask:
# can never be resolved as slot(ted) dep
return False
## MAYBE TODO
## elif self.ident and dep_env.want_slotres_override(self.ident):
### ^^^^^^^^^^? ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^?
## want_slot_res, ... = dep_env.get_slotres_override(self.ident,...)
### ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^?
## if not want_slot_res:
## return False
## elif ...:
## ...
##
# else might be resolvable as slot(ted) dep
elif self.mode == 2:
return self.resolving_package
elif vmod & dep_env.VMOD_EQ:
return get_slotted_result ( dep_env, fuzzy, vmod )
else:
return False
# -- end if <vmod>
# --- end of handle_version_relative_match (...) ---
|