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This commit is derived from Chris Larson's checksum work, turned into a standalone piece of code for parsing python and shell functions. The deindent code has been replaced with code to work around indentation for speed. The original NodeVisitor in the ast was replaced with a faster class walk call. Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
372 lines
11 KiB
Python
372 lines
11 KiB
Python
# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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"""
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BitBake Smart Dictionary Implementation
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Functions for interacting with the data structure used by the
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BitBake build tools.
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"""
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# Copyright (C) 2003, 2004 Chris Larson
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# Copyright (C) 2004, 2005 Seb Frankengul
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# Copyright (C) 2005, 2006 Holger Hans Peter Freyther
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# Copyright (C) 2005 Uli Luckas
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# Copyright (C) 2005 ROAD GmbH
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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# Based on functions from the base bb module, Copyright 2003 Holger Schurig
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import copy, re, sys
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import bb
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from bb import utils
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from bb.COW import COWDictBase
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__setvar_keyword__ = ["_append", "_prepend"]
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__setvar_regexp__ = re.compile('(?P<base>.*?)(?P<keyword>_append|_prepend)(_(?P<add>.*))?')
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__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
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__expand_python_regexp__ = re.compile(r"\${@.+?}")
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class VariableParse:
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def __init__(self, varname, d, val = None):
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self.varname = varname
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self.d = d
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self.value = val
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self.references = set()
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self.execs = set()
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def var_sub(self, match):
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key = match.group()[2:-1]
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if self.varname and key:
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if self.varname == key:
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raise Exception("variable %s references itself!" % self.varname)
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var = self.d.getVar(key, 1)
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if var is not None:
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self.references.add(key)
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return var
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else:
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return match.group()
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def python_sub(self, match):
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code = match.group()[3:-1]
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codeobj = compile(code.strip(), self.varname or "<expansion>", "eval")
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parser = bb.codeparser.PythonParser()
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parser.parse_python(code)
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self.references |= parser.references
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self.execs |= parser.execs
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value = utils.better_eval(codeobj, {"d": self.d})
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return str(value)
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class DataSmart:
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def __init__(self, special = COWDictBase.copy(), seen = COWDictBase.copy() ):
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self.dict = {}
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# cookie monster tribute
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self._special_values = special
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self._seen_overrides = seen
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self.expand_cache = {}
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def expandWithRefs(self, s, varname):
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if not isinstance(s, basestring): # sanity check
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return VariableParse(varname, self, s)
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if varname and varname in self.expand_cache:
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return self.expand_cache[varname]
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varparse = VariableParse(varname, self)
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while s.find('${') != -1:
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olds = s
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try:
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s = __expand_var_regexp__.sub(varparse.var_sub, s)
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s = __expand_python_regexp__.sub(varparse.python_sub, s)
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if s == olds:
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break
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except KeyboardInterrupt:
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raise
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except:
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bb.msg.note(1, bb.msg.domain.Data, "%s:%s while evaluating:\n%s" % (sys.exc_info()[0], sys.exc_info()[1], s))
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raise
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varparse.value = s
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if varname:
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self.expand_cache[varname] = varparse
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return varparse
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def expand(self, s, varname):
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return self.expandWithRefs(s, varname).value
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def finalize(self):
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"""Performs final steps upon the datastore, including application of overrides"""
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overrides = (self.getVar("OVERRIDES", True) or "").split(":") or []
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#
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# Well let us see what breaks here. We used to iterate
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# over each variable and apply the override and then
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# do the line expanding.
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# If we have bad luck - which we will have - the keys
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# where in some order that is so important for this
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# method which we don't have anymore.
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# Anyway we will fix that and write test cases this
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# time.
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#
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# First we apply all overrides
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# Then we will handle _append and _prepend
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#
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for o in overrides:
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# calculate '_'+override
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l = len(o) + 1
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# see if one should even try
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if o not in self._seen_overrides:
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continue
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vars = self._seen_overrides[o]
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for var in vars:
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name = var[:-l]
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try:
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self[name] = self[var]
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except Exception:
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bb.msg.note(1, bb.msg.domain.Data, "Untracked delVar")
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# now on to the appends and prepends
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if "_append" in self._special_values:
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appends = self._special_values["_append"] or []
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for append in appends:
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for (a, o) in self.getVarFlag(append, "_append") or []:
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# maybe the OVERRIDE was not yet added so keep the append
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if (o and o in overrides) or not o:
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self.delVarFlag(append, "_append")
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if o and not o in overrides:
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continue
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sval = self.getVar(append, False) or ""
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sval += a
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self.setVar(append, sval)
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if "_prepend" in self._special_values:
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prepends = self._special_values["_prepend"] or []
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for prepend in prepends:
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for (a, o) in self.getVarFlag(prepend, "_prepend") or []:
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# maybe the OVERRIDE was not yet added so keep the prepend
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if (o and o in overrides) or not o:
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self.delVarFlag(prepend, "_prepend")
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if o and not o in overrides:
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continue
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sval = a + (self.getVar(prepend, False) or "")
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self.setVar(prepend, sval)
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def initVar(self, var):
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self.expand_cache = {}
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if not var in self.dict:
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self.dict[var] = {}
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def _findVar(self, var):
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dest = self.dict
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while dest:
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if var in dest:
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return dest[var]
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if "_data" not in dest:
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break
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dest = dest["_data"]
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def _makeShadowCopy(self, var):
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if var in self.dict:
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return
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local_var = self._findVar(var)
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if local_var:
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self.dict[var] = copy.copy(local_var)
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else:
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self.initVar(var)
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def setVar(self, var, value):
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self.expand_cache = {}
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match = __setvar_regexp__.match(var)
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if match and match.group("keyword") in __setvar_keyword__:
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base = match.group('base')
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keyword = match.group("keyword")
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override = match.group('add')
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l = self.getVarFlag(base, keyword) or []
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l.append([value, override])
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self.setVarFlag(base, keyword, l)
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# todo make sure keyword is not __doc__ or __module__
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# pay the cookie monster
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try:
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self._special_values[keyword].add( base )
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except KeyError:
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self._special_values[keyword] = set()
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self._special_values[keyword].add( base )
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return
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if not var in self.dict:
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self._makeShadowCopy(var)
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# more cookies for the cookie monster
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if '_' in var:
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override = var[var.rfind('_')+1:]
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if override not in self._seen_overrides:
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self._seen_overrides[override] = set()
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self._seen_overrides[override].add( var )
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# setting var
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self.dict[var]["content"] = value
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def getVar(self, var, exp):
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value = self.getVarFlag(var, "content")
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if exp and value:
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return self.expand(value, var)
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return value
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def renameVar(self, key, newkey):
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"""
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Rename the variable key to newkey
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"""
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val = self.getVar(key, 0)
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if val is not None:
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self.setVar(newkey, val)
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for i in ('_append', '_prepend'):
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src = self.getVarFlag(key, i)
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if src is None:
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continue
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dest = self.getVarFlag(newkey, i) or []
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dest.extend(src)
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self.setVarFlag(newkey, i, dest)
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if i in self._special_values and key in self._special_values[i]:
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self._special_values[i].remove(key)
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self._special_values[i].add(newkey)
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self.delVar(key)
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def delVar(self, var):
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self.expand_cache = {}
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self.dict[var] = {}
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def setVarFlag(self, var, flag, flagvalue):
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if not var in self.dict:
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self._makeShadowCopy(var)
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self.dict[var][flag] = flagvalue
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def getVarFlag(self, var, flag):
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local_var = self._findVar(var)
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if local_var:
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if flag in local_var:
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return copy.copy(local_var[flag])
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return None
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def delVarFlag(self, var, flag):
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local_var = self._findVar(var)
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if not local_var:
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return
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if not var in self.dict:
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self._makeShadowCopy(var)
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if var in self.dict and flag in self.dict[var]:
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del self.dict[var][flag]
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def setVarFlags(self, var, flags):
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if not var in self.dict:
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self._makeShadowCopy(var)
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for i in flags:
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if i == "content":
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continue
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self.dict[var][i] = flags[i]
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def getVarFlags(self, var):
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local_var = self._findVar(var)
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flags = {}
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if local_var:
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for i in local_var:
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if i == "content":
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continue
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flags[i] = local_var[i]
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if len(flags) == 0:
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return None
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return flags
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def delVarFlags(self, var):
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if not var in self.dict:
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self._makeShadowCopy(var)
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if var in self.dict:
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content = None
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# try to save the content
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if "content" in self.dict[var]:
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content = self.dict[var]["content"]
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self.dict[var] = {}
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self.dict[var]["content"] = content
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else:
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del self.dict[var]
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def createCopy(self):
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"""
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Create a copy of self by setting _data to self
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"""
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# we really want this to be a DataSmart...
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data = DataSmart(seen=self._seen_overrides.copy(), special=self._special_values.copy())
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data.dict["_data"] = self.dict
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return data
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# Dictionary Methods
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def keys(self):
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def _keys(d, mykey):
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if "_data" in d:
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_keys(d["_data"], mykey)
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for key in d.keys():
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if key != "_data":
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mykey[key] = None
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keytab = {}
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_keys(self.dict, keytab)
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return keytab.keys()
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def __getitem__(self, item):
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#print "Warning deprecated"
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return self.getVar(item, False)
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def __setitem__(self, var, data):
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#print "Warning deprecated"
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self.setVar(var, data)
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