mirror of
git://git.yoctoproject.org/poky.git
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8bef99d3c8
Having a global method scope confuses users and with the introduction of parallel parsing, its not even possible to correctly detect conflicting functions. Rather than try and fix that, its simpler to retire the global method scope and restrict functions to those locations they're defined within. This is more what users actually expect too. If we remove the global function scope, the need for methodpool is reduced to the point we may as well retire it. There is some small loss of caching of parsed functions but timing measurements so the impact to be neglibile in the overall parsing time. (Bitbake rev: 4d50690489ee8dc329a9b0c7bc4ceb29b71e95e9) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
259 lines
8.2 KiB
Python
259 lines
8.2 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 .bb files
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Reads a .bb 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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from __future__ import absolute_import
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import re, bb, os
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import logging
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import bb.build, bb.utils
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from bb import data
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from . import ConfHandler
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from .. import resolve_file, ast, logger
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from .ConfHandler import include, init
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# For compatibility
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bb.deprecate_import(__name__, "bb.parse", ["vars_from_file"])
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__func_start_regexp__ = re.compile( r"(((?P<py>python)|(?P<fr>fakeroot))\s*)*(?P<func>[\w\.\-\+\{\}\$]+)?\s*\(\s*\)\s*{$" )
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__inherit_regexp__ = re.compile( r"inherit\s+(.+)" )
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__export_func_regexp__ = re.compile( r"EXPORT_FUNCTIONS\s+(.+)" )
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__addtask_regexp__ = re.compile("addtask\s+(?P<func>\w+)\s*((before\s*(?P<before>((.*(?=after))|(.*))))|(after\s*(?P<after>((.*(?=before))|(.*)))))*")
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__addhandler_regexp__ = re.compile( r"addhandler\s+(.+)" )
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__def_regexp__ = re.compile( r"def\s+(\w+).*:" )
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__python_func_regexp__ = re.compile( r"(\s+.*)|(^$)" )
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__infunc__ = ""
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__inpython__ = False
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__body__ = []
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__classname__ = ""
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cached_statements = {}
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# We need to indicate EOF to the feeder. This code is so messy that
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# factoring it out to a close_parse_file method is out of question.
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# We will use the IN_PYTHON_EOF as an indicator to just close the method
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#
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# The two parts using it are tightly integrated anyway
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IN_PYTHON_EOF = -9999999999999
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def supports(fn, d):
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"""Return True if fn has a supported extension"""
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return os.path.splitext(fn)[-1] in [".bb", ".bbclass", ".inc"]
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def inherit(files, fn, lineno, d):
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__inherit_cache = d.getVar('__inherit_cache') or []
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files = d.expand(files).split()
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for file in files:
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if not os.path.isabs(file) and not file.endswith(".bbclass"):
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file = os.path.join('classes', '%s.bbclass' % file)
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if not os.path.isabs(file):
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dname = os.path.dirname(fn)
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bbpath = "%s:%s" % (dname, d.getVar("BBPATH", True))
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abs_fn = bb.utils.which(bbpath, file)
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if abs_fn:
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file = abs_fn
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if not file in __inherit_cache:
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logger.log(logging.DEBUG -1, "BB %s:%d: inheriting %s", fn, lineno, file)
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__inherit_cache.append( file )
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d.setVar('__inherit_cache', __inherit_cache)
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include(fn, file, lineno, d, "inherit")
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__inherit_cache = d.getVar('__inherit_cache') or []
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def get_statements(filename, absolute_filename, base_name):
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global cached_statements
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try:
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return cached_statements[absolute_filename]
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except KeyError:
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file = open(absolute_filename, 'r')
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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 = file.readline()
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if not s: break
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s = s.rstrip()
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feeder(lineno, s, filename, base_name, statements)
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file.close()
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if __inpython__:
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# add a blank line to close out any python definition
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feeder(IN_PYTHON_EOF, "", filename, base_name, statements)
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if filename.endswith(".bbclass") or filename.endswith(".inc"):
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cached_statements[absolute_filename] = statements
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return statements
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def handle(fn, d, include):
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global __func_start_regexp__, __inherit_regexp__, __export_func_regexp__, __addtask_regexp__, __addhandler_regexp__, __infunc__, __body__, __residue__, __classname__
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__body__ = []
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__infunc__ = ""
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__classname__ = ""
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__residue__ = []
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if include == 0:
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logger.debug(2, "BB %s: handle(data)", fn)
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else:
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logger.debug(2, "BB %s: handle(data, include)", fn)
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base_name = os.path.basename(fn)
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(root, ext) = os.path.splitext(base_name)
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init(d)
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if ext == ".bbclass":
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__classname__ = root
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__inherit_cache = d.getVar('__inherit_cache') or []
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if not fn in __inherit_cache:
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__inherit_cache.append(fn)
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d.setVar('__inherit_cache', __inherit_cache)
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if include != 0:
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oldfile = d.getVar('FILE')
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else:
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oldfile = None
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abs_fn = resolve_file(fn, d)
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if include:
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bb.parse.mark_dependency(d, abs_fn)
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# actual loading
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statements = get_statements(fn, abs_fn, base_name)
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# DONE WITH PARSING... time to evaluate
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if ext != ".bbclass":
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d.setVar('FILE', abs_fn)
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try:
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statements.eval(d)
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except bb.parse.SkipPackage:
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bb.data.setVar("__SKIPPED", True, d)
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if include == 0:
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return { "" : d }
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if ext != ".bbclass" and include == 0:
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return ast.multi_finalize(fn, d)
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if oldfile:
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d.setVar("FILE", oldfile)
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return d
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def feeder(lineno, s, fn, root, statements):
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global __func_start_regexp__, __inherit_regexp__, __export_func_regexp__, __addtask_regexp__, __addhandler_regexp__, __def_regexp__, __python_func_regexp__, __inpython__, __infunc__, __body__, bb, __residue__, __classname__
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if __infunc__:
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if s == '}':
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__body__.append('')
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ast.handleMethod(statements, fn, lineno, __infunc__, __body__)
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__infunc__ = ""
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__body__ = []
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else:
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__body__.append(s)
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return
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if __inpython__:
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m = __python_func_regexp__.match(s)
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if m and lineno != IN_PYTHON_EOF:
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__body__.append(s)
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return
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else:
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ast.handlePythonMethod(statements, fn, lineno, __inpython__,
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root, __body__)
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__body__ = []
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__inpython__ = False
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if lineno == IN_PYTHON_EOF:
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return
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if s and s[0] == '#':
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if len(__residue__) != 0 and __residue__[0][0] != "#":
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bb.fatal("There is a comment on line %s of file %s (%s) which is in the middle of a multiline expression.\nBitbake used to ignore these but no longer does so, please fix your metadata as errors are likely as a result of this change." % (lineno, fn, s))
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if len(__residue__) != 0 and __residue__[0][0] == "#" and (not s or s[0] != "#"):
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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))
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if s and s[-1] == '\\':
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__residue__.append(s[:-1])
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return
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s = "".join(__residue__) + s
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__residue__ = []
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# Skip empty lines
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if s == '':
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return
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# Skip comments
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if s[0] == '#':
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return
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m = __func_start_regexp__.match(s)
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if m:
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__infunc__ = m.group("func") or "__anonymous"
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ast.handleMethodFlags(statements, fn, lineno, __infunc__, m)
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return
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m = __def_regexp__.match(s)
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if m:
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__body__.append(s)
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__inpython__ = m.group(1)
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return
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m = __export_func_regexp__.match(s)
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if m:
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ast.handleExportFuncs(statements, fn, lineno, m, __classname__)
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return
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m = __addtask_regexp__.match(s)
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if m:
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ast.handleAddTask(statements, fn, lineno, m)
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return
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m = __addhandler_regexp__.match(s)
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if m:
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ast.handleBBHandlers(statements, fn, lineno, m)
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return
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m = __inherit_regexp__.match(s)
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if m:
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ast.handleInherit(statements, fn, lineno, m)
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return
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return ConfHandler.feeder(lineno, s, fn, statements)
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# Add us to the handlers list
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from .. import handlers
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handlers.append({'supports': supports, 'handle': handle, 'init': init})
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del handlers
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