200 lines
6.7 KiB
Python
200 lines
6.7 KiB
Python
#!/usr/bin/env python
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# 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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"""class for handling configuration data files
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Reads a .conf file and obtains its metadata
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Copyright (C) 2003, 2004 Chris Larson
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Copyright (C) 2003, 2004 Phil Blundell
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA."""
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import re, bb.data, os, sys
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from bb import debug, fatal
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from bb.parse import ParseError
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#__config_regexp__ = re.compile( r"(?P<exp>export\s*)?(?P<var>[a-zA-Z0-9\-_+.${}]+)\s*(?P<colon>:)?(?P<ques>\?)?=\s*(?P<apo>['\"]?)(?P<value>.*)(?P=apo)$")
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__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)$")
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__include_regexp__ = re.compile( r"include\s+(.+)" )
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def init(data):
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if not bb.data.getVar('TOPDIR', data):
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bb.data.setVar('TOPDIR', os.getcwd(), data)
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if not bb.data.getVar('BBPATH', data):
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bb.data.setVar('BBPATH', os.path.join(sys.prefix, 'share', 'bitbake'), data)
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def supports(fn, d):
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return localpath(fn, d)[-5:] == ".conf"
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def localpath(fn, d):
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if os.path.exists(fn):
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return fn
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localfn = None
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try:
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localfn = bb.fetch.localpath(fn, d)
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except bb.MalformedUrl:
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pass
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if not localfn:
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localfn = fn
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return localfn
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def obtain(fn, data = bb.data.init()):
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import sys, bb
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fn = bb.data.expand(fn, data)
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localfn = bb.data.expand(localpath(fn, data), data)
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if localfn != fn:
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dldir = bb.data.getVar('DL_DIR', data, 1)
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if not dldir:
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debug(1, "obtain: DL_DIR not defined")
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return localfn
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bb.mkdirhier(dldir)
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try:
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bb.fetch.init([fn])
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except bb.fetch.NoMethodError:
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(type, value, traceback) = sys.exc_info()
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debug(1, "obtain: no method: %s" % value)
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return localfn
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try:
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bb.fetch.go(data)
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except bb.fetch.MissingParameterError:
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(type, value, traceback) = sys.exc_info()
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debug(1, "obtain: missing parameters: %s" % value)
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return localfn
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except bb.fetch.FetchError:
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(type, value, traceback) = sys.exc_info()
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debug(1, "obtain: failed: %s" % value)
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return localfn
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return localfn
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def include(oldfn, fn, data = bb.data.init()):
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if oldfn == fn: # prevent infinate recursion
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return None
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import bb
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fn = bb.data.expand(fn, data)
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oldfn = bb.data.expand(oldfn, data)
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from bb.parse import handle
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try:
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ret = handle(fn, data, 1)
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except IOError:
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debug(2, "CONF file '%s' not found" % fn)
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def handle(fn, data = bb.data.init(), include = 0):
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if include:
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inc_string = "including"
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else:
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inc_string = "reading"
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init(data)
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if include == 0:
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bb.data.inheritFromOS(data)
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oldfile = None
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else:
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oldfile = bb.data.getVar('FILE', data)
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fn = obtain(fn, data)
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bbpath = []
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if not os.path.isabs(fn):
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f = None
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vbbpath = bb.data.getVar("BBPATH", data)
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if vbbpath:
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bbpath += vbbpath.split(":")
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for p in bbpath:
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currname = os.path.join(bb.data.expand(p, data), fn)
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if os.access(currname, os.R_OK):
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f = open(currname, 'r')
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abs_fn = currname
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debug(1, "CONF %s %s" % (inc_string, currname))
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break
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if f is None:
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raise IOError("file not found")
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else:
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f = open(fn,'r')
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debug(1, "CONF %s %s" % (inc_string,fn))
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abs_fn = fn
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if include:
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bb.parse.mark_dependency(data, abs_fn)
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lineno = 0
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bb.data.setVar('FILE', fn, data)
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while 1:
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lineno = lineno + 1
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s = f.readline()
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if not s: break
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w = s.strip()
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if not w: continue # skip empty lines
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s = s.rstrip()
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if s[0] == '#': continue # skip comments
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while s[-1] == '\\':
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s2 = f.readline()[:-1].strip()
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lineno = lineno + 1
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s = s[:-1] + s2
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feeder(lineno, s, fn, data)
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if oldfile:
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bb.data.setVar('FILE', oldfile, data)
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return data
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def feeder(lineno, s, fn, data = bb.data.init()):
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m = __config_regexp__.match(s)
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if m:
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groupd = m.groupdict()
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key = groupd["var"]
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if "exp" in groupd and groupd["exp"] != None:
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bb.data.setVarFlag(key, "export", 1, data)
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if "ques" in groupd and groupd["ques"] != None:
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val = bb.data.getVar(key, data)
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if val == None:
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val = groupd["value"]
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elif "colon" in groupd and groupd["colon"] != None:
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val = bb.data.expand(groupd["value"], data)
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elif "append" in groupd and groupd["append"] != None:
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val = "%s %s" % ((bb.data.getVar(key, data) or ""), groupd["value"])
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elif "prepend" in groupd and groupd["prepend"] != None:
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val = "%s %s" % (groupd["value"], (bb.data.getVar(key, data) or ""))
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elif "postdot" in groupd and groupd["postdot"] != None:
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val = "%s%s" % ((bb.data.getVar(key, data) or ""), groupd["value"])
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elif "predot" in groupd and groupd["predot"] != None:
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val = "%s%s" % (groupd["value"], (bb.data.getVar(key, data) or ""))
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else:
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val = groupd["value"]
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if 'flag' in groupd and groupd['flag'] != None:
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# bb.note("setVarFlag(%s, %s, %s, data)" % (key, groupd['flag'], val))
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bb.data.setVarFlag(key, groupd['flag'], val, data)
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else:
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bb.data.setVar(key, val, data)
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return
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m = __include_regexp__.match(s)
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if m:
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s = bb.data.expand(m.group(1), data)
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# debug(2, "CONF %s:%d: including %s" % (fn, lineno, s))
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include(fn, s, data)
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return
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raise ParseError("%s:%d: unparsed line: '%s'" % (fn, lineno, s));
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# Add us to the handlers list
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from bb.parse import handlers
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handlers.append({'supports': supports, 'handle': handle, 'init': init})
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del handlers
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