140 lines
4.2 KiB
Python
140 lines
4.2 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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"""
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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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"""
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# Copyright (C) 2003, 2004 Chris Larson
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# Copyright (C) 2003, 2004 Phil Blundell
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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import re, bb.data, os
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import logging
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import bb.utils
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from bb.parse import ParseError, resolve_file, ast, logger
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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<lazyques>\?\?=)|(?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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__require_regexp__ = re.compile( r"require\s+(.+)" )
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__export_regexp__ = re.compile( r"export\s+(.+)" )
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def init(data):
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topdir = bb.data.getVar('TOPDIR', data)
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if not topdir:
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bb.data.setVar('TOPDIR', os.getcwd(), data)
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def supports(fn, d):
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return fn[-5:] == ".conf"
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def include(oldfn, fn, data, error_out):
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"""
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error_out If True a ParseError will be raised if the to be included
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config-files could not be included.
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"""
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if oldfn == fn: # prevent infinite 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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if not os.path.isabs(fn):
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dname = os.path.dirname(oldfn)
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bbpath = "%s:%s" % (dname, bb.data.getVar("BBPATH", data, 1))
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abs_fn = bb.utils.which(bbpath, fn)
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if abs_fn:
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fn = abs_fn
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from bb.parse import handle
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try:
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ret = handle(fn, data, True)
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except IOError:
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if error_out:
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raise ParseError("Could not %(error_out)s file %(fn)s" % vars() )
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logger.debug(2, "CONF file '%s' not found", fn)
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def handle(fn, data, include):
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init(data)
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if include == 0:
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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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abs_fn = resolve_file(fn, data)
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f = open(abs_fn, 'r')
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if include:
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bb.parse.mark_dependency(data, abs_fn)
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statements = ast.StatementGroup()
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lineno = 0
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while True:
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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().strip()
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lineno = lineno + 1
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s = s[:-1] + s2
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feeder(lineno, s, fn, statements)
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# DONE WITH PARSING... time to evaluate
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bb.data.setVar('FILE', abs_fn, data)
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statements.eval(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, statements):
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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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ast.handleData(statements, fn, lineno, groupd)
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return
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m = __include_regexp__.match(s)
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if m:
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ast.handleInclude(statements, fn, lineno, m, False)
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return
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m = __require_regexp__.match(s)
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if m:
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ast.handleInclude(statements, fn, lineno, m, True)
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return
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m = __export_regexp__.match(s)
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if m:
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ast.handleExport(statements, fn, lineno, m)
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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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