261 lines
8.9 KiB
Python
261 lines
8.9 KiB
Python
"""
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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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# SPDX-License-Identifier: GPL-2.0-only
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#
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import re, bb, os
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import bb.build, bb.utils, bb.data_smart
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from . import ConfHandler
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from .. import resolve_file, ast, logger, ParseError
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from .ConfHandler import include, init
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__func_start_regexp__ = re.compile(r"(((?P<py>python(?=(\s|\()))|(?P<fr>fakeroot(?=\s)))\s*)*(?P<func>[\w\.\-\+\{\}\$:]+)?\s*\(\s*\)\s*{$" )
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__inherit_regexp__ = re.compile(r"inherit\s+(.+)" )
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__export_func_regexp__ = re.compile(r"EXPORT_FUNCTIONS\s+(.+)" )
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__addtask_regexp__ = re.compile(r"addtask\s+(?P<func>\w+)\s*((before\s*(?P<before>((.*(?=after))|(.*))))|(after\s*(?P<after>((.*(?=before))|(.*)))))*")
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__deltask_regexp__ = re.compile(r"deltask\s+(.+)")
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__addhandler_regexp__ = re.compile(r"addhandler\s+(.+)" )
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__def_regexp__ = re.compile(r"def\s+(\w+).*:" )
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__python_func_regexp__ = re.compile(r"(\s+.*)|(^$)|(^#)" )
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__python_tab_regexp__ = re.compile(r" *\t")
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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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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', False) 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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bbpath = d.getVar("BBPATH")
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abs_fn, attempts = bb.utils.which(bbpath, file, history=True)
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for af in attempts:
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if af != abs_fn:
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bb.parse.mark_dependency(d, af)
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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.debug("Inheriting %s (from %s:%d)" % (file, fn, lineno))
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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', False) 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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with open(absolute_filename, 'r') as f:
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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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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(lineno, "", filename, base_name, statements, eof=True)
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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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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', False) 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', False)
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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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# 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" and abs_fn != oldfile:
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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.SkipRecipe:
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d.setVar("__SKIPPED", True)
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if include == 0:
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return { "" : d }
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if __infunc__:
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raise ParseError("Shell function %s is never closed" % __infunc__[0], __infunc__[1], __infunc__[2])
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if __residue__:
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raise ParseError("Leftover unparsed (incomplete?) data %s from %s" % __residue__, fn)
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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 ext != ".bbclass" and oldfile and abs_fn != 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, eof=False):
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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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# Check tabs in python functions:
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# - def py_funcname(): covered by __inpython__
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# - python(): covered by '__anonymous' == __infunc__[0]
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# - python funcname(): covered by __infunc__[3]
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if __inpython__ or (__infunc__ and ('__anonymous' == __infunc__[0] or __infunc__[3])):
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tab = __python_tab_regexp__.match(s)
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if tab:
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bb.warn('python should use 4 spaces indentation, but found tabs in %s, line %s' % (root, lineno))
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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__[0], __body__, __infunc__[3], __infunc__[4])
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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 not 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 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:\n'''\n%s\n'''\nwhich is in the middle of a multiline expression. This syntax is invalid, please correct it." % (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:\n%s\nPlease clarify whether this is all a comment or should be parsed." % (lineno - len(__residue__), fn, "\n".join(__residue__)))
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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", fn, lineno, m.group("py") is not None, m.group("fr") is not None]
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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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if len(m.group().split()) == 2:
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# Check and warn for "addtask task1 task2"
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m2 = re.match(r"addtask\s+(?P<func>\w+)(?P<ignores>.*)", s)
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if m2 and m2.group('ignores'):
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logger.warning('addtask ignored: "%s"' % m2.group('ignores'))
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# Check and warn for "addtask task1 before task2 before task3", the
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# similar to "after"
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taskexpression = s.split()
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for word in ('before', 'after'):
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if taskexpression.count(word) > 1:
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logger.warning("addtask contained multiple '%s' keywords, only one is supported" % word)
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# Check and warn for having task with exprssion as part of task name
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for te in taskexpression:
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if any( ( "%s_" % keyword ) in te for keyword in bb.data_smart.__setvar_keyword__ ):
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raise ParseError("Task name '%s' contains a keyword which is not recommended/supported.\nPlease rename the task not to include the keyword.\n%s" % (te, ("\n".join(map(str, bb.data_smart.__setvar_keyword__)))), fn)
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ast.handleAddTask(statements, fn, lineno, m)
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return
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m = __deltask_regexp__.match(s)
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if m:
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ast.handleDelTask(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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