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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 the file and obtains its metadata"""
import re, oe.data, os, sys
from oe import debug, fatal
#__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>=\+)|=)\s*(?P<apo>['\"]?)(?P<value>.*)(?P=apo)$")
__include_regexp__ = re.compile( r"include\s+(.+)" )
def init(data):
if not oe.data.getVar('TOPDIR', data):
oe.data.setVar('TOPDIR', os.getcwd(), data)
if not oe.data.getVar('OEPATH', data):
oebuild = os.path.abspath(sys.argv[0])
oebin = os.path.dirname(oebuild)
oedir = os.path.dirname(oebin)
oe.data.setVar('OEPATH', "${TOPDIR}:%s:%s:${HOME}/.oe:${OEDIR}/bin:${OEDIR}:%s/share/oe" % (oebin, oedir, sys.prefix), data)
def supports(fn, d):
return localpath(fn, d)[-5:] == ".conf"
def localpath(fn, d):
if os.path.exists(fn):
return fn
localfn = None
try:
localfn = oe.fetch.localpath(fn, d)
except oe.MalformedUrl:
pass
if not localfn:
localfn = fn
return localfn
def obtain(fn, data = {}):
import sys, oe
fn = oe.data.expand(fn, data)
localfn = oe.data.expand(localpath(fn, data), data)
if localfn != fn:
dldir = oe.data.getVar('DL_DIR', data, 1)
if not dldir:
debug(1, "obtain: DL_DIR not defined")
return localfn
oe.mkdirhier(dldir)
try:
oe.fetch.init([fn])
except oe.fetch.NoMethodError:
(type, value, traceback) = sys.exc_info()
debug(1, "obtain: no method: %s" % value)
return localfn
try:
oe.fetch.go(data)
except oe.fetch.MissingParameterError:
(type, value, traceback) = sys.exc_info()
debug(1, "obtain: missing parameters: %s" % value)
return localfn
except oe.fetch.FetchError:
(type, value, traceback) = sys.exc_info()
debug(1, "obtain: failed: %s" % value)
return localfn
return localfn
def include(oldfn, fn, data = {}):
if oldfn == fn: # prevent infinate recursion
return None
import oe
fn = oe.data.expand(fn, data)
oldfn = oe.data.expand(oldfn, data)
from oe.parse import handle
try:
ret = handle(fn, data, 1)
except IOError:
debug(2, "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:
oe.data.inheritFromOS(data)
oldfile = None
else:
oldfile = oe.data.getVar('FILE', data)
fn = obtain(fn, data)
oepath = ['.']
if not os.path.isabs(fn):
f = None
voepath = oe.data.getVar("OEPATH", data)
if voepath:
oepath += voepath.split(":")
for p in oepath:
currname = os.path.join(oe.data.expand(p, data), fn)
if os.access(currname, os.R_OK):
f = open(currname, 'r')
abs_fn = currname
debug(1, "CONF %s %s" % (inc_string, currname))
break
if f is None:
raise IOError("file not found")
else:
f = open(fn,'r')
debug(1, "CONF %s %s" % (inc_string,fn))
abs_fn = fn
if include:
oe.parse.mark_dependency(data, abs_fn)
lineno = 0
oe.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:
oe.data.setVar('FILE', oldfile, data)
if oe.data.getVar('OEDIR', data, 1):
oe.note("OEDIR is deprecated, please switch to OEPATH.")
return data
def feeder(lineno, s, fn, data = {}):
m = __config_regexp__.match(s)
if m:
groupd = m.groupdict()
key = groupd["var"]
if "exp" in groupd and groupd["exp"] != None:
oe.data.setVarFlag(key, "export", 1, data)
if "ques" in groupd and groupd["ques"] != None:
val = oe.data.getVar(key, data)
if val == None:
val = groupd["value"]
elif "colon" in groupd and groupd["colon"] != None:
val = oe.data.expand(groupd["value"], data)
elif "append" in groupd and groupd["append"] != None:
val = "%s %s" % ((oe.data.getVar(key, data) or ""), groupd["value"])
elif "prepend" in groupd and groupd["prepend"] != None:
val = "%s %s" % (groupd["value"], (oe.data.getVar(key, data) or ""))
else:
val = groupd["value"]
if 'flag' in groupd and groupd['flag'] != None:
# oe.note("setVarFlag(%s, %s, %s, data)" % (key, groupd['flag'], val))
oe.data.setVarFlag(key, groupd['flag'], val, data)
else:
oe.data.setVar(key, val, data)
return
m = __include_regexp__.match(s)
if m:
s = oe.data.expand(m.group(1), data)
# debug(2, "CONF %s:%d: including %s" % (fn, lineno, s))
include(fn, s, data)
return
raise ParseError("%s:%d: unparsed line: '%s'" % (fn, lineno, s));
# Add us to the handlers list
from oe.parse import handlers
handlers.append({'supports': supports, 'handle': handle, 'init': init})
del handlers
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