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git://git.yoctoproject.org/poky.git
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b127874ee6
We will be needing this information to improve the tracebacks of python code from the metadata, as well as to give the user information about where variables were defined, so they know how it ended up the way it is. (Bitbake rev: 9615c538b894f71a2d1a0ba6b3f260db91e75786) Signed-off-by: Chris Larson <chris_larson@mentor.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
246 lines
7.4 KiB
Python
246 lines
7.4 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.fetch, 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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classes = [ None, ]
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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, d):
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__inherit_cache = data.getVar('__inherit_cache', d) or []
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fn = ""
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lineno = 0
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for file in files:
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file = data.expand(file, d)
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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 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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data.setVar('__inherit_cache', __inherit_cache, d)
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include(fn, file, d, "inherit")
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__inherit_cache = data.getVar('__inherit_cache', d) 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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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__
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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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classes.append(__classname__)
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__inherit_cache = data.getVar('__inherit_cache', d) or []
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if not fn in __inherit_cache:
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__inherit_cache.append(fn)
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data.setVar('__inherit_cache', __inherit_cache, d)
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if include != 0:
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oldfile = data.getVar('FILE', d)
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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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data.setVar('FILE', fn, d)
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statements.eval(d)
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if ext == ".bbclass":
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classes.remove(__classname__)
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else:
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if include == 0:
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return ast.multi_finalize(fn, d)
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if oldfile:
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bb.data.setVar("FILE", oldfile, d)
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# we have parsed the bb class now
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if ext == ".bbclass" or ext == ".inc":
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bb.methodpool.get_parsed_dict()[base_name] = 1
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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__, classes, bb, __residue__
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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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# fall through
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if s == '' or s[0] == '#': return # skip comments and empty lines
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if 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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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, classes)
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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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