From c527fd1f14c27855a37f2e8ac5346ce8d940ced2 Mon Sep 17 00:00:00 2001 From: Tudor Florea Date: Thu, 16 Oct 2014 03:05:19 +0200 Subject: initial commit for Enea Linux 4.0-140929 Migrated from the internal git server on the daisy-enea-point-release branch Signed-off-by: Tudor Florea --- bitbake/lib/bb/parse/parse_py/ConfHandler.py | 189 +++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 bitbake/lib/bb/parse/parse_py/ConfHandler.py (limited to 'bitbake/lib/bb/parse/parse_py/ConfHandler.py') diff --git a/bitbake/lib/bb/parse/parse_py/ConfHandler.py b/bitbake/lib/bb/parse/parse_py/ConfHandler.py new file mode 100644 index 0000000000..978ebe4608 --- /dev/null +++ b/bitbake/lib/bb/parse/parse_py/ConfHandler.py @@ -0,0 +1,189 @@ +#!/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, os +import logging +import bb.utils +from bb.parse import ParseError, resolve_file, ast, logger + +__config_regexp__ = re.compile( r""" + ^ + (?Pexport\s*)? + (?P[a-zA-Z0-9\-~_+.${}/]+?) + (\[(?P[a-zA-Z0-9\-_+.]+)\])? + + \s* ( + (?P:=) | + (?P\?\?=) | + (?P\?=) | + (?P\+=) | + (?P=\+) | + (?P=\.) | + (?P\.=) | + = + ) \s* + + (?!'[^']*'[^']*'$) + (?!\"[^\"]*\"[^\"]*\"$) + (?P['\"]) + (?P.*) + (?P=apo) + $ + """, re.X) +__include_regexp__ = re.compile( r"include\s+(.+)" ) +__require_regexp__ = re.compile( r"require\s+(.+)" ) +__export_regexp__ = re.compile( r"export\s+([a-zA-Z0-9\-_+.${}/]+)$" ) + +def init(data): + topdir = data.getVar('TOPDIR') + if not topdir: + data.setVar('TOPDIR', os.getcwd()) + + +def supports(fn, d): + return fn[-5:] == ".conf" + +def include(oldfn, fn, lineno, data, error_out): + """ + error_out: A string indicating the verb (e.g. "include", "inherit") to be + used in a ParseError that will be raised if the file to be included could + not be included. Specify False to avoid raising an error in this case. + """ + if oldfn == fn: # prevent infinite recursion + return None + + import bb + fn = data.expand(fn) + oldfn = data.expand(oldfn) + + if not os.path.isabs(fn): + dname = os.path.dirname(oldfn) + bbpath = "%s:%s" % (dname, data.getVar("BBPATH", True)) + abs_fn, attempts = bb.utils.which(bbpath, fn, history=True) + if abs_fn and bb.parse.check_dependency(data, abs_fn): + bb.warn("Duplicate inclusion for %s in %s" % (abs_fn, data.getVar('FILE', True))) + for af in attempts: + bb.parse.mark_dependency(data, af) + if abs_fn: + fn = abs_fn + elif bb.parse.check_dependency(data, fn): + bb.warn("Duplicate inclusion for %s in %s" % (fn, data.getVar('FILE', True))) + + from bb.parse import handle + try: + ret = handle(fn, data, True) + except (IOError, OSError): + if error_out: + raise ParseError("Could not %(error_out)s file %(fn)s" % vars(), oldfn, lineno) + logger.debug(2, "CONF file '%s' not found", fn) + bb.parse.mark_dependency(data, fn) + +# We have an issue where a UI might want to enforce particular settings such as +# an empty DISTRO variable. If configuration files do something like assigning +# a weak default, it turns out to be very difficult to filter out these changes, +# particularly when the weak default might appear half way though parsing a chain +# of configuration files. We therefore let the UIs hook into configuration file +# parsing. This turns out to be a hard problem to solve any other way. +confFilters = [] + +def handle(fn, data, include): + init(data) + + if include == 0: + oldfile = None + else: + oldfile = data.getVar('FILE') + + abs_fn = resolve_file(fn, data) + f = open(abs_fn, 'r') + + if include: + bb.parse.mark_dependency(data, abs_fn) + + statements = ast.StatementGroup() + lineno = 0 + while True: + lineno = lineno + 1 + s = f.readline() + if not s: + break + w = s.strip() + # skip empty lines + if not w: + continue + s = s.rstrip() + while s[-1] == '\\': + s2 = f.readline().strip() + lineno = lineno + 1 + if (not s2 or s2 and s2[0] != "#") and s[0] == "#" : + bb.fatal("There is a confusing multiline, partially commented expression on line %s of file %s (%s).\nPlease clarify whether this is all a comment or should be parsed." % (lineno, fn, s)) + s = s[:-1] + s2 + # skip comments + if s[0] == '#': + continue + feeder(lineno, s, abs_fn, statements) + + # DONE WITH PARSING... time to evaluate + data.setVar('FILE', abs_fn) + statements.eval(data) + if oldfile: + data.setVar('FILE', oldfile) + + f.close() + + for f in confFilters: + f(fn, data) + + return data + +def feeder(lineno, s, fn, statements): + m = __config_regexp__.match(s) + if m: + groupd = m.groupdict() + ast.handleData(statements, fn, lineno, groupd) + return + + m = __include_regexp__.match(s) + if m: + ast.handleInclude(statements, fn, lineno, m, False) + return + + m = __require_regexp__.match(s) + if m: + ast.handleInclude(statements, fn, lineno, m, True) + return + + m = __export_regexp__.match(s) + if m: + ast.handleExport(statements, fn, lineno, m) + return + + raise ParseError("unparsed line: '%s'" % s, fn, lineno); + +# Add us to the handlers list +from bb.parse import handlers +handlers.append({'supports': supports, 'handle': handle, 'init': init}) +del handlers -- cgit v1.2.3-54-g00ecf