Squashed 'yocto-poky/' content from commit ea562de
git-subtree-dir: yocto-poky
git-subtree-split: ea562de57590c966cd5a75fda8defecd397e6436
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 0000000..fbd75b1
--- /dev/null
+++ b/bitbake/lib/bb/parse/parse_py/ConfHandler.py
@@ -0,0 +1,193 @@
+#!/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 errno
+import re
+import os
+import bb.utils
+from bb.parse import ParseError, resolve_file, ast, logger, handle
+
+__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)
+ $
+ """, 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', False)
+ if not topdir:
+ data.setVar('TOPDIR', os.getcwd())
+
+
+def supports(fn, d):
+ return fn[-5:] == ".conf"
+
+def include(parentfn, 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 parentfn == fn: # prevent infinite recursion
+ return None
+
+ fn = data.expand(fn)
+ parentfn = data.expand(parentfn)
+
+ if not os.path.isabs(fn):
+ dname = os.path.dirname(parentfn)
+ 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):
+ logger.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):
+ logger.warn("Duplicate inclusion for %s in %s" % (fn, data.getVar('FILE', True)))
+
+ try:
+ bb.parse.handle(fn, data, True)
+ except (IOError, OSError) as exc:
+ if exc.errno == errno.ENOENT:
+ if error_out:
+ raise ParseError("Could not %s file %s" % (error_out, fn), parentfn, lineno)
+ logger.debug(2, "CONF file '%s' not found", fn)
+ else:
+ if error_out:
+ raise ParseError("Could not %s file %s: %s" % (error_out, fn, exc.strerror), parentfn, lineno)
+ else:
+ raise ParseError("Error parsing %s: %s" % (fn, exc.strerror), parentfn, lineno)
+
+# 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', False)
+
+ 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