bitbakeの重要な関数

    def parseConfigurationFiles(self, prefiles, postfiles):
        data = self.configuration.data
        bb.parse.init_parser(data)

        # Parse files for loading *before* bitbake.conf and any includes
        for f in prefiles:
            data = _parse(f, data)

        layerconf = self._findLayerConf()
        if layerconf:
            parselog.debug(2, "Found bblayers.conf (%s)", layerconf)
            data = _parse(layerconf, data)

            layers = (data.getVar('BBLAYERS', True) or "").split()

            data = bb.data.createCopy(data)
            for layer in layers:
                parselog.debug(2, "Adding layer %s", layer)
                data.setVar('LAYERDIR', layer)
                data = _parse(os.path.join(layer, "conf", "layer.conf"), data)
                data.expandVarref('LAYERDIR')

            data.delVar('LAYERDIR')

        if not data.getVar("BBPATH", True):
            raise SystemExit("The BBPATH variable is not set")

        data = _parse(os.path.join("conf", "bitbake.conf"), data)

        # Parse files for loading *after* bitbake.conf and any includes
        for p in postfiles:
            data = _parse(p, data)

        # Handle any INHERITs and inherit the base class
        bbclasses  = ["base"] + (data.getVar('INHERIT', True) or "").split()
        for bbclass in bbclasses:
            data = _inherit(bbclass, data)

        # Nomally we only register event handlers at the end of parsing .bb files
        # We register any handlers we've found so far here...
        for var in data.getVar('__BBHANDLERS') or []:
            bb.event.register(var, data.getVar(var))

        if data.getVar("BB_WORKERCONTEXT", False) is None:
            bb.fetch.fetcher_init(data)
        bb.codeparser.parser_cache_init(data)
        bb.event.fire(bb.event.ConfigParsed(), data)

        if data.getVar("BB_INVALIDCONF") is True:
            data.setVar("BB_INVALIDCONF", False)
            self.parseConfigurationFiles(self.configuration.prefile,
                                         self.configuration.postfile)
        else:
            bb.parse.init_parser(data)
            data.setVar('BBINCLUDED',bb.parse.get_file_depends(data))
            self.configuration.data = data
            self.configuration.data_hash = data.get_hash()

解析BBFILES,bblayers.conf, bitbake.conf, base.bbclassなど.