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- #!/usr/bin/env python
- # ex:ts=4:sw=4:sts=4:et
- # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
- """
- class for handling configuration data files
- Reads a .conf file and obtains its metadata
- """
- # Copyright (C) 2003, 2004 Chris Larson
- # Copyright (C) 2003, 2004 Phil Blundell
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License version 2 as
- # published by the Free Software Foundation.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License along
- # with this program; if not, write to the Free Software Foundation, Inc.,
- # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- import re, bb.data, os, sys
- from bb.parse import ParseError
- #__config_regexp__ = re.compile( r"(?P<exp>export\s*)?(?P<var>[a-zA-Z0-9\-_+.${}]+)\s*(?P<colon>:)?(?P<ques>\?)?=\s*(?P<apo>['\"]?)(?P<value>.*)(?P=apo)$")
- __config_regexp__ = re.compile( r"(?P<exp>export\s*)?(?P<var>[a-zA-Z0-9\-_+.${}/]+)(\[(?P<flag>[a-zA-Z0-9\-_+.]+)\])?\s*((?P<colon>:=)|(?P<ques>\?=)|(?P<append>\+=)|(?P<prepend>=\+)|(?P<predot>=\.)|(?P<postdot>\.=)|=)\s*(?P<apo>['\"]?)(?P<value>.*)(?P=apo)$")
- __include_regexp__ = re.compile( r"include\s+(.+)" )
- __require_regexp__ = re.compile( r"require\s+(.+)" )
- __export_regexp__ = re.compile( r"export\s+(.+)" )
- def init(data):
- topdir = bb.data.getVar('TOPDIR', data)
- if not topdir:
- topdir = os.getcwd()
- bb.data.setVar('TOPDIR', topdir, data)
- if not bb.data.getVar('BBPATH', data):
- from pkg_resources import Requirement, resource_filename
- bitbake = Requirement.parse("bitbake")
- datadir = resource_filename(bitbake, "../share/bitbake")
- basedir = resource_filename(bitbake, "..")
- bb.data.setVar('BBPATH', '%s:%s:%s' % (topdir, datadir, basedir), data)
- def supports(fn, d):
- return localpath(fn, d)[-5:] == ".conf"
- def localpath(fn, d):
- if os.path.exists(fn):
- return fn
- if "://" not in fn:
- return fn
- localfn = None
- try:
- localfn = bb.fetch.localpath(fn, d, False)
- except bb.MalformedUrl:
- pass
- if not localfn:
- return fn
- return localfn
- def obtain(fn, data):
- import sys, bb
- fn = bb.data.expand(fn, data)
- localfn = bb.data.expand(localpath(fn, data), data)
- if localfn != fn:
- dldir = bb.data.getVar('DL_DIR', data, 1)
- if not dldir:
- bb.msg.debug(1, bb.msg.domain.Parsing, "obtain: DL_DIR not defined")
- return localfn
- bb.mkdirhier(dldir)
- try:
- bb.fetch.init([fn], data)
- except bb.fetch.NoMethodError:
- (type, value, traceback) = sys.exc_info()
- bb.msg.debug(1, bb.msg.domain.Parsing, "obtain: no method: %s" % value)
- return localfn
- try:
- bb.fetch.go(data)
- except bb.fetch.MissingParameterError:
- (type, value, traceback) = sys.exc_info()
- bb.msg.debug(1, bb.msg.domain.Parsing, "obtain: missing parameters: %s" % value)
- return localfn
- except bb.fetch.FetchError:
- (type, value, traceback) = sys.exc_info()
- bb.msg.debug(1, bb.msg.domain.Parsing, "obtain: failed: %s" % value)
- return localfn
- return localfn
- def include(oldfn, fn, data, error_out):
- """
- error_out If True a ParseError will be reaised if the to be included
- """
- if oldfn == fn: # prevent infinate recursion
- return None
- import bb
- fn = bb.data.expand(fn, data)
- oldfn = bb.data.expand(oldfn, data)
- if not os.path.isabs(fn):
- dname = os.path.dirname(oldfn)
- bbpath = "%s:%s" % (dname, bb.data.getVar("BBPATH", data, 1))
- abs_fn = bb.which(bbpath, fn)
- if abs_fn:
- fn = abs_fn
- from bb.parse import handle
- try:
- ret = handle(fn, data, True)
- except IOError:
- if error_out:
- raise ParseError("Could not %(error_out)s file %(fn)s" % vars() )
- bb.msg.debug(2, bb.msg.domain.Parsing, "CONF file '%s' not found" % fn)
- def handle(fn, data, include = 0):
- if include:
- inc_string = "including"
- else:
- inc_string = "reading"
- init(data)
- if include == 0:
- oldfile = None
- else:
- oldfile = bb.data.getVar('FILE', data)
- fn = obtain(fn, data)
- if not os.path.isabs(fn):
- f = None
- bbpath = bb.data.getVar("BBPATH", data, 1) or []
- for p in bbpath.split(":"):
- currname = os.path.join(p, fn)
- if os.access(currname, os.R_OK):
- f = open(currname, 'r')
- abs_fn = currname
- bb.msg.debug(2, bb.msg.domain.Parsing, "CONF %s %s" % (inc_string, currname))
- break
- if f is None:
- raise IOError("file '%s' not found" % fn)
- else:
- f = open(fn,'r')
- bb.msg.debug(1, bb.msg.domain.Parsing, "CONF %s %s" % (inc_string,fn))
- abs_fn = fn
- if include:
- bb.parse.mark_dependency(data, abs_fn)
- lineno = 0
- bb.data.setVar('FILE', fn, data)
- while 1:
- lineno = lineno + 1
- s = f.readline()
- if not s: break
- w = s.strip()
- if not w: continue # skip empty lines
- s = s.rstrip()
- if s[0] == '#': continue # skip comments
- while s[-1] == '\\':
- s2 = f.readline()[:-1].strip()
- lineno = lineno + 1
- s = s[:-1] + s2
- feeder(lineno, s, fn, data)
- if oldfile:
- bb.data.setVar('FILE', oldfile, data)
- return data
- def feeder(lineno, s, fn, data):
- def getFunc(groupd, key, data):
- if 'flag' in groupd and groupd['flag'] != None:
- return bb.data.getVarFlag(key, groupd['flag'], data)
- else:
- return bb.data.getVar(key, data)
- m = __config_regexp__.match(s)
- if m:
- groupd = m.groupdict()
- key = groupd["var"]
- if "exp" in groupd and groupd["exp"] != None:
- bb.data.setVarFlag(key, "export", 1, data)
- if "ques" in groupd and groupd["ques"] != None:
- val = getFunc(groupd, key, data)
- if val == None:
- val = groupd["value"]
- elif "colon" in groupd and groupd["colon"] != None:
- e = data.createCopy()
- bb.data.update_data(e)
- val = bb.data.expand(groupd["value"], e)
- elif "append" in groupd and groupd["append"] != None:
- val = "%s %s" % ((getFunc(groupd, key, data) or ""), groupd["value"])
- elif "prepend" in groupd and groupd["prepend"] != None:
- val = "%s %s" % (groupd["value"], (getFunc(groupd, key, data) or ""))
- elif "postdot" in groupd and groupd["postdot"] != None:
- val = "%s%s" % ((getFunc(groupd, key, data) or ""), groupd["value"])
- elif "predot" in groupd and groupd["predot"] != None:
- val = "%s%s" % (groupd["value"], (getFunc(groupd, key, data) or ""))
- else:
- val = groupd["value"]
- if 'flag' in groupd and groupd['flag'] != None:
- bb.msg.debug(3, bb.msg.domain.Parsing, "setVarFlag(%s, %s, %s, data)" % (key, groupd['flag'], val))
- bb.data.setVarFlag(key, groupd['flag'], val, data)
- else:
- bb.data.setVar(key, val, data)
- return
- m = __include_regexp__.match(s)
- if m:
- s = bb.data.expand(m.group(1), data)
- bb.msg.debug(3, bb.msg.domain.Parsing, "CONF %s:%d: including %s" % (fn, lineno, s))
- include(fn, s, data, False)
- return
- m = __require_regexp__.match(s)
- if m:
- s = bb.data.expand(m.group(1), data)
- include(fn, s, data, "include required")
- return
- m = __export_regexp__.match(s)
- if m:
- bb.data.setVarFlag(m.group(1), "export", 1, data)
- return
- raise ParseError("%s:%d: unparsed line: '%s'" % (fn, lineno, s));
- # Add us to the handlers list
- from bb.parse import handlers
- handlers.append({'supports': supports, 'handle': handle, 'init': init})
- del handlers
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