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# 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):
if not bb.data.getVar('TOPDIR', data):
bb.data.setVar('TOPDIR', os.getcwd(), data)
if not bb.data.getVar('BBPATH', data):
bb.data.setVar('BBPATH', os.path.join(sys.prefix, 'share', 'bitbake'), 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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