mirror of
https://github.com/espressif/esp-idf
synced 2025-03-10 01:29:21 -04:00
ldgen: implement common fragment parsing
This commit is contained in:
Renz Christian Bagaporo
parent
e349329d86
commit
7dcef2c33c
@ -13,8 +13,6 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import re
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import os
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from sdkconfig import SDKConfig
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@ -23,49 +21,179 @@ from pyparsing import restOfLine
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from pyparsing import alphanums
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from pyparsing import Word
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from pyparsing import alphas
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from pyparsing import ParseBaseException
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from pyparsing import ParseFatalException
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from pyparsing import Suppress
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from pyparsing import Group
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from pyparsing import Literal
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from pyparsing import ZeroOrMore
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from pyparsing import Optional
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from pyparsing import originalTextFor
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from common import LdGenFailure
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from pyparsing import Forward
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from pyparsing import indentedBlock
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from collections import namedtuple
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import abc
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class FragmentFileModel():
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KeyGrammar = namedtuple("KeyGrammar", "grammar min max required")
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class FragmentFile():
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"""
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Fragment file internal representation. Parses and stores instances of the fragment definitions
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contained within the file.
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"""
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def __init__(self, fragment_file):
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def __init__(self, fragment_file, sdkconfig):
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try:
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fragment_file = open(fragment_file, "r")
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except TypeError:
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pass
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path = os.path.realpath(fragment_file.name)
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sections = Sections.get_fragment_grammar()
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scheme = Scheme.get_fragment_grammar()
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mapping = Mapping.get_fragment_grammar()
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indent_stack = [1]
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# Each fragment file is composed of sections, scheme or mapping fragments. The grammar
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# for each of those objects are defined it the respective classes
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parser = OneOrMore(sections | scheme | mapping)
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class parse_ctx:
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fragment = None # current fragment
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key = "" # current key
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keys = list() # list of keys parsed
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key_grammar = None # current key grammar
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# Set any text beginnning with # as comment
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parser.ignore("#" + restOfLine)
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@staticmethod
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def reset():
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parse_ctx.fragment_instance = None
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parse_ctx.key = ""
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parse_ctx.keys = list()
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parse_ctx.key_grammar = None
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def fragment_type_parse_action(toks):
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parse_ctx.reset()
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parse_ctx.fragment = FRAGMENT_TYPES[toks[0]]() # create instance of the fragment
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return None
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def expand_conditionals(toks, stmts):
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try:
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stmt = toks["value"]
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stmts.append(stmt)
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except KeyError:
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try:
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conditions = toks["conditional"]
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for condition in conditions:
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try:
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_toks = condition[1]
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_cond = condition[0]
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if sdkconfig.evaluate_expression(_cond):
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expand_conditionals(_toks, stmts)
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break
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except IndexError:
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expand_conditionals(condition[0], stmts)
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except KeyError:
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for tok in toks:
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expand_conditionals(tok, stmts)
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def key_body_parsed(pstr, loc, toks):
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stmts = list()
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expand_conditionals(toks, stmts)
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if parse_ctx.key_grammar.min and len(stmts) < parse_ctx.key_grammar.min:
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raise ParseFatalException(pstr, loc, "fragment requires at least %d values for key '%s'" %
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(parse_ctx.key_grammar.min, parse_ctx.key))
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if parse_ctx.key_grammar.max and len(stmts) > parse_ctx.key_grammar.max:
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raise ParseFatalException(pstr, loc, "fragment requires at most %d values for key '%s'" %
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(parse_ctx.key_grammar.max, parse_ctx.key))
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try:
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parse_ctx.fragment.set_key_value(parse_ctx.key, stmts)
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except Exception as e:
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raise ParseFatalException(pstr, loc, "unable to add key '%s'; %s" % (parse_ctx.key, e.message))
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return None
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key = Word(alphanums + "_") + Suppress(":")
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key_stmt = Forward()
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condition_block = indentedBlock(key_stmt, indent_stack)
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key_stmts = OneOrMore(condition_block)
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key_body = Suppress(key) + key_stmts
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key_body.setParseAction(key_body_parsed)
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condition = originalTextFor(SDKConfig.get_expression_grammar()).setResultsName("condition")
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if_condition = Group(Suppress("if") + condition + Suppress(":") + condition_block)
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elif_condition = Group(Suppress("elif") + condition + Suppress(":") + condition_block)
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else_condition = Group(Suppress("else") + Suppress(":") + condition_block)
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conditional = (if_condition + Optional(OneOrMore(elif_condition)) + Optional(else_condition)).setResultsName("conditional")
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def key_parse_action(pstr, loc, toks):
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key = toks[0]
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if key in parse_ctx.keys:
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raise ParseFatalException(pstr, loc, "duplicate key '%s' value definition" % parse_ctx.key)
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parse_ctx.key = key
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parse_ctx.keys.append(key)
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try:
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parse_ctx.key_grammar = parse_ctx.fragment.get_key_grammars()[key]
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key_grammar = parse_ctx.key_grammar.grammar
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except KeyError:
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raise ParseFatalException(pstr, loc, "key '%s' is not supported by fragment" % key)
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except Exception as e:
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raise ParseFatalException(pstr, loc, "unable to parse key '%s'; %s" % (key, e.message))
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key_stmt << (conditional | Group(key_grammar).setResultsName("value"))
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return None
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def name_parse_action(pstr, loc, toks):
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parse_ctx.fragment.name = toks[0]
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key.setParseAction(key_parse_action)
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ftype = Word(alphas).setParseAction(fragment_type_parse_action)
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fid = Suppress(":") + Word(alphanums + "_.").setResultsName("name")
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fid.setParseAction(name_parse_action)
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header = Suppress("[") + ftype + fid + Suppress("]")
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def fragment_parse_action(pstr, loc, toks):
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key_grammars = parse_ctx.fragment.get_key_grammars()
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required_keys = set([k for (k,v) in key_grammars.items() if v.required])
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present_keys = required_keys.intersection(set(parse_ctx.keys))
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if present_keys != required_keys:
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raise ParseFatalException(pstr, loc, "required keys %s for fragment not found" %
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list(required_keys - present_keys))
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return parse_ctx.fragment
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fragment_stmt = Forward()
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fragment_block = indentedBlock(fragment_stmt, indent_stack)
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fragment_if_condition = Group(Suppress("if") + condition + Suppress(":") + fragment_block)
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fragment_elif_condition = Group(Suppress("elif") + condition + Suppress(":") + fragment_block)
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fragment_else_condition = Group(Suppress("else") + Suppress(":") + fragment_block)
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fragment_conditional = (fragment_if_condition + Optional(OneOrMore(fragment_elif_condition)) +
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Optional(fragment_else_condition)).setResultsName("conditional")
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fragment = (header + OneOrMore(indentedBlock(key_body, indent_stack, False))).setResultsName("value")
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fragment.setParseAction(fragment_parse_action)
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fragment.ignore("#" + restOfLine)
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fragment_stmt << (Group(fragment) | Group(fragment_conditional))
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def fragment_stmt_parsed(pstr, loc, toks):
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stmts = list()
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expand_conditionals(toks, stmts)
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return stmts
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parser = ZeroOrMore(fragment_stmt)
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parser.setParseAction(fragment_stmt_parsed)
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self.fragments = parser.parseFile(fragment_file, parseAll=True)
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except ParseBaseException as e:
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# the actual parse error is kind of useless for normal users, so just point to the location of
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# the error
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raise LdGenFailure("Parse error in linker fragment %s: error at line %d col %d (char %d)" % (
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fragment_file.name, e.lineno, e.column, e.loc))
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for fragment in self.fragments:
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fragment.path = path
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class Fragment:
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class Fragment():
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__metaclass__ = abc.ABCMeta
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"""
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Encapsulates a fragment as defined in the generator syntax. Sets values common to all fragment and performs processing
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such as checking the validity of the fragment name and getting the entry values.
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@ -74,22 +202,20 @@ class Fragment:
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IDENTIFIER = Word(alphas + "_", alphanums + "_")
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ENTITY = Word(alphanums + ".-_$")
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def __init__(self, name, entries):
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self.path = None
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self.name = name
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self.entries = entries
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@abc.abstractmethod
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def set_key_value(self, key, parse_results):
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pass
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@abc.abstractmethod
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def get_key_grammars(self):
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pass
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class Sections(Fragment):
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def __init__(self, name, entries):
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Fragment.__init__(self, name, entries)
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self._process_entries()
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def _process_entries(self):
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# Quietly ignore duplicate entries
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self.entries = set(self.entries)
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self.entries = list(self.entries)
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grammars = {
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"entries": KeyGrammar(Word(alphanums + "+.").setResultsName("section"), 1, None, True)
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}
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"""
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Utility function that returns a list of sections given a sections fragment entry,
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@ -110,20 +236,14 @@ class Sections(Fragment):
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else:
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return (sections_entry, None)
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@staticmethod
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def get_fragment_grammar():
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name = Fragment.IDENTIFIER
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header = Suppress("[") + Suppress("sections") + Suppress(":") + name.setResultsName("name") + Suppress("]")
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entry = Word(alphanums + "+" + ".")
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entries = Suppress("entries") + Suppress(":") + Group(OneOrMore(entry)).setResultsName("entries")
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def set_key_value(self, key, parse_results):
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if key == "entries":
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self.entries = set()
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for result in parse_results:
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self.entries.add(result["section"])
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sections = Group(header + entries)
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sections.setParseAction(lambda t: Sections(t[0].name, t[0].entries))
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sections.ignore("#" + restOfLine)
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return sections
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def get_key_grammars(self):
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return self.__class__.grammars
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class Scheme(Fragment):
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@ -131,38 +251,19 @@ class Scheme(Fragment):
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Encapsulates a scheme fragment, which defines what target input sections are placed under.
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"""
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def __init__(self, name, items):
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Fragment.__init__(self, name, items)
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self._process_entries()
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grammars = {
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"entries": KeyGrammar(Fragment.IDENTIFIER.setResultsName("sections") + Suppress("->") +
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Fragment.IDENTIFIER.setResultsName("target"), 1, None, True)
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}
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def _process_entries(self):
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processed = set()
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def set_key_value(self, key, parse_results):
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if key == "entries":
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self.entries = set()
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for result in parse_results:
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self.entries.add((result["sections"], result["target"]))
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# Store entries as a set of tuples. Quietly ignores duplicate entries.
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for entry in self.entries:
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processed.add((entry.sections, entry.target))
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self.entries = processed
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@staticmethod
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def get_fragment_grammar():
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name = Fragment.IDENTIFIER
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header = Suppress("[") + Suppress("scheme") + Suppress(":") + name.setResultsName("name") + Suppress("]")
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# Scheme entry in the form 'sections -> target'
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sections = Fragment.IDENTIFIER
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target = Fragment.IDENTIFIER
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entry = Group(sections.setResultsName("sections") + Suppress("->") + target.setResultsName("target"))
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entries = Suppress("entries") + Suppress(":") + Group(OneOrMore(entry)).setResultsName("entries")
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scheme = Group(header + entries)
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scheme.setParseAction(lambda t: Scheme(t[0].name, t[0].entries))
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scheme.ignore("#" + restOfLine)
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return scheme
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def get_key_grammars(self):
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return self.__class__.grammars
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class Mapping(Fragment):
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@ -170,67 +271,37 @@ class Mapping(Fragment):
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Encapsulates a mapping fragment, which defines what targets the input sections of mappable entties are placed under.
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"""
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# Name of the default condition entry
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DEFAULT_CONDITION = "default"
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MAPPING_ALL_OBJECTS = "*"
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def __init__(self, archive, entries):
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self.archive = archive
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def set_key_value(self, key, parse_results):
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if key == "archive":
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self.archive = parse_results[0]["archive"]
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elif key == "entries":
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self.entries = set()
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# Generate name from archive value by replacing all non-alphanumeric
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# characters with underscore
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name = Mapping.get_mapping_name_from_archive(self.archive)
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Fragment.__init__(self, name, entries)
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self._process_entries()
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def _create_mappings_set(self, mappings):
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mapping_set = set()
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for mapping in mappings:
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obj = mapping.object
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symbol = mapping.symbol
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scheme = mapping.scheme
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if symbol == "":
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for result in parse_results:
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obj = None
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symbol = None
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scheme = None
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# Quietly handle duplicate definitions under the same condition
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mapping_set.add((obj, symbol, scheme))
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try:
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obj = result["object"]
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except KeyError:
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pass
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return mapping_set
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try:
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symbol = result["symbol"]
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except KeyError:
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pass
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def _process_entries(self):
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processed = []
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try:
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scheme = result["scheme"]
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except KeyError:
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pass
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for normal_group in self.entries[0]:
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# Get the original string of the condition
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condition = next(iter(normal_group.condition.asList())).strip()
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mappings = self._create_mappings_set(normal_group[1])
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processed.append((condition, mappings))
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default_group = self.entries[1]
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if len(default_group) > 1:
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mappings = self._create_mappings_set(default_group[1])
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else:
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mappings = self._create_mappings_set(default_group[0])
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processed.append(("default", mappings))
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self.entries = processed
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@staticmethod
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def get_mapping_name_from_archive(archive):
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return re.sub(r"[^0-9a-zA-Z]+", "_", archive)
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@staticmethod
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def get_fragment_grammar():
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# Match header [mapping]
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header = Suppress("[") + Suppress("mapping") + Suppress("]")
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self.entries.add((obj, symbol, scheme))
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def get_key_grammars(self):
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# There are three possible patterns for mapping entries:
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# obj:symbol (scheme)
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# obj (scheme)
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@ -239,33 +310,22 @@ class Mapping(Fragment):
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symbol = Suppress(":") + Fragment.IDENTIFIER.setResultsName("symbol")
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scheme = Suppress("(") + Fragment.IDENTIFIER.setResultsName("scheme") + Suppress(")")
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pattern1 = Group(obj + symbol + scheme)
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pattern2 = Group(obj + scheme)
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pattern3 = Group(Literal(Mapping.MAPPING_ALL_OBJECTS).setResultsName("object") + scheme)
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pattern1 = obj + symbol + scheme
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pattern2 = obj + scheme
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pattern3 = Literal(Mapping.MAPPING_ALL_OBJECTS).setResultsName("object") + scheme
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mapping_entry = pattern1 | pattern2 | pattern3
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entry = pattern1 | pattern2 | pattern3
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# To simplify parsing, classify groups of condition-mapping entry into two types: normal and default
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# A normal grouping is one with a non-default condition. The default grouping is one which contains the
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# default condition
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mapping_entries = Group(ZeroOrMore(mapping_entry)).setResultsName("mappings")
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grammars = {
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"archive": KeyGrammar(Fragment.ENTITY.setResultsName("archive"), 1, 1, True),
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"entries": KeyGrammar(entry, 1, None, True)
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}
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normal_condition = Suppress(":") + originalTextFor(SDKConfig.get_expression_grammar())
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default_condition = Optional(Suppress(":") + Literal(Mapping.DEFAULT_CONDITION))
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return grammars
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normal_group = Group(normal_condition.setResultsName("condition") + mapping_entries)
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default_group = Group(default_condition + mapping_entries).setResultsName("default_group")
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normal_groups = Group(ZeroOrMore(normal_group)).setResultsName("normal_groups")
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# Any mapping fragment definition can have zero or more normal group and only one default group as a last entry.
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archive = Suppress("archive") + Suppress(":") + Fragment.ENTITY.setResultsName("archive")
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entries = Suppress("entries") + Suppress(":") + (normal_groups + default_group).setResultsName("entries")
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mapping = Group(header + archive + entries)
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mapping.setParseAction(lambda t: Mapping(t[0].archive, t[0].entries))
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mapping.ignore("#" + restOfLine)
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return mapping
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FRAGMENT_TYPES = {
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"sections": Sections,
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"scheme": Scheme,
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"mapping": Mapping
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}
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@ -321,7 +321,7 @@ class GenerationModel:
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return scheme_dictionary
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def generate_rules(self, sdkconfig, sections_infos):
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def generate_rules(self, sections_infos):
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placement_rules = collections.defaultdict(list)
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scheme_dictionary = self._build_scheme_dictionary()
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@ -334,25 +334,12 @@ class GenerationModel:
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# Generate rules based on mapping fragments
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for mapping in self.mappings.values():
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for (condition, entries) in mapping.entries:
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condition_true = False
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||||
|
||||
# Only non-default condition are evaluated agains sdkconfig model
|
||||
if condition != Mapping.DEFAULT_CONDITION:
|
||||
try:
|
||||
condition_true = sdkconfig.evaluate_expression(condition)
|
||||
except Exception as e:
|
||||
raise GenerationException(e.message, mapping)
|
||||
else:
|
||||
condition_true = True
|
||||
|
||||
if condition_true:
|
||||
|
||||
mapping_rules = list()
|
||||
|
||||
archive = mapping.archive
|
||||
for (obj, symbol, scheme_name) in entries:
|
||||
for (obj, symbol, scheme_name) in mapping.entries:
|
||||
try:
|
||||
if not (obj == Mapping.MAPPING_ALL_OBJECTS and symbol is None and
|
||||
scheme_name == GenerationModel.DEFAULT_SCHEME):
|
||||
self._add_mapping_rules(archive, obj, symbol, scheme_name, scheme_dictionary, mapping_rules)
|
||||
except KeyError:
|
||||
message = GenerationException.UNDEFINED_REFERENCE + " to scheme '" + scheme_name + "'."
|
||||
@ -360,8 +347,6 @@ class GenerationModel:
|
||||
|
||||
all_mapping_rules[mapping.name] = mapping_rules
|
||||
|
||||
break # Exit on first condition that evaluates to true
|
||||
|
||||
# Detect rule conflicts
|
||||
for mapping_rules in all_mapping_rules.items():
|
||||
self._detect_conflicts(mapping_rules)
|
||||
@ -397,8 +382,7 @@ class GenerationModel:
|
||||
if intersections and rule_a.maps_same_entities_as(rule_b):
|
||||
rules_string = str([str(rule_a), str(rule_b)])
|
||||
message = "Rules " + rules_string + " map sections " + str(list(intersections)) + " into multiple targets."
|
||||
mapping = self.mappings[Mapping.get_mapping_name_from_archive(archive)]
|
||||
raise GenerationException(message, mapping)
|
||||
raise GenerationException(message)
|
||||
|
||||
def _create_extra_rules(self, rules):
|
||||
# This function generates extra rules for symbol specific rules. The reason for generating extra rules is to isolate,
|
||||
@ -523,7 +507,7 @@ class TemplateModel:
|
||||
# Does not match marker syntax
|
||||
self.members.append(line)
|
||||
|
||||
def fill(self, mapping_rules, sdkconfig):
|
||||
def fill(self, mapping_rules):
|
||||
for member in self.members:
|
||||
target = None
|
||||
try:
|
||||
|
||||
@ -19,10 +19,11 @@ import argparse
|
||||
import sys
|
||||
import tempfile
|
||||
|
||||
from fragments import FragmentFileModel
|
||||
from fragments import FragmentFile
|
||||
from sdkconfig import SDKConfig
|
||||
from generation import GenerationModel, TemplateModel, SectionsInfo
|
||||
from common import LdGenFailure
|
||||
from pyparsing import ParseException, ParseFatalException
|
||||
|
||||
|
||||
def main():
|
||||
@ -52,13 +53,11 @@ def main():
|
||||
|
||||
argparser.add_argument(
|
||||
"--config", "-c",
|
||||
help="Project configuration",
|
||||
type=argparse.FileType("r"))
|
||||
help="Project configuration")
|
||||
|
||||
argparser.add_argument(
|
||||
"--kconfig", "-k",
|
||||
help="IDF Kconfig file",
|
||||
type=argparse.FileType("r"))
|
||||
help="IDF Kconfig file")
|
||||
|
||||
argparser.add_argument(
|
||||
"--env", "-e",
|
||||
@ -89,15 +88,22 @@ def main():
|
||||
|
||||
generation_model = GenerationModel()
|
||||
|
||||
sdkconfig = SDKConfig(kconfig_file, config_file, args.env)
|
||||
|
||||
for fragment_file in fragment_files:
|
||||
fragment_file = FragmentFileModel(fragment_file)
|
||||
try:
|
||||
fragment_file = FragmentFile(fragment_file, sdkconfig)
|
||||
except (ParseException, ParseFatalException) as e:
|
||||
# ParseException is raised on incorrect grammar
|
||||
# ParseFatalException is raised on correct grammar, but inconsistent contents (ex. duplicate
|
||||
# keys, key unsupported by fragment, unexpected number of values, etc.)
|
||||
raise LdGenFailure("failed to parse %s\n%s" % (fragment_file.name, str(e)))
|
||||
generation_model.add_fragments_from_file(fragment_file)
|
||||
|
||||
sdkconfig = SDKConfig(kconfig_file, config_file, args.env)
|
||||
mapping_rules = generation_model.generate_rules(sdkconfig, sections_infos)
|
||||
mapping_rules = generation_model.generate_rules(sections_infos)
|
||||
|
||||
script_model = TemplateModel(input_file)
|
||||
script_model.fill(mapping_rules, sdkconfig)
|
||||
script_model.fill(mapping_rules)
|
||||
|
||||
with tempfile.TemporaryFile("w+") as output:
|
||||
script_model.write(output)
|
||||
|
||||
@ -15,7 +15,7 @@
|
||||
#
|
||||
|
||||
import os
|
||||
from pyparsing import Word, printables, Combine, Literal, hexnums, quotedString, Optional, nums, removeQuotes, oneOf, Group, infixNotation, opAssoc
|
||||
from pyparsing import Word, alphanums, printables, Combine, Literal, hexnums, quotedString, Optional, nums, removeQuotes, oneOf, Group, infixNotation, opAssoc
|
||||
|
||||
import sys
|
||||
try:
|
||||
@ -34,11 +34,11 @@ class SDKConfig:
|
||||
"""
|
||||
|
||||
# A configuration entry is in the form CONFIG=VALUE. Definitions of components of that grammar
|
||||
IDENTIFIER = Word(printables.upper())
|
||||
IDENTIFIER = Word(alphanums.upper() + "_")
|
||||
|
||||
HEX = Combine("0x" + Word(hexnums)).setParseAction(lambda t:int(t[0], 16))
|
||||
DECIMAL = Combine(Optional(Literal("+") | Literal("-")) + Word(nums)).setParseAction(lambda t:int(t[0]))
|
||||
LITERAL = Word(printables)
|
||||
LITERAL = Word(printables.replace(":", ""))
|
||||
QUOTED_LITERAL = quotedString.setParseAction(removeQuotes)
|
||||
|
||||
VALUE = HEX | DECIMAL | LITERAL | QUOTED_LITERAL
|
||||
@ -53,8 +53,8 @@ class SDKConfig:
|
||||
value = " ".join(value.split())
|
||||
os.environ[name] = value
|
||||
|
||||
self.config = kconfiglib.Kconfig(kconfig_file.name)
|
||||
self.config.load_config(sdkconfig_file.name)
|
||||
self.config = kconfiglib.Kconfig(kconfig_file)
|
||||
self.config.load_config(sdkconfig_file)
|
||||
|
||||
def evaluate_expression(self, expression):
|
||||
result = self.config.eval_string(expression)
|
||||
@ -64,7 +64,7 @@ class SDKConfig:
|
||||
elif result == 2: # y
|
||||
return True
|
||||
else: # m
|
||||
raise Exception("Unsupported config expression result.")
|
||||
raise Exception("unsupported config expression result")
|
||||
|
||||
@staticmethod
|
||||
def get_expression_grammar():
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user