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32e44e2866
Add support for automatically promoting class inherits to deferred inherits by listing them in the BB_DEFER_BBCLASSES variable. (Bitbake rev: 8e741b2e885a12d119788d04aa4efcd724dd6bfa) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
307 lines
10 KiB
Python
307 lines
10 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*{$" )
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__inherit_regexp__ = re.compile(r"inherit\s+(.+)" )
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__inherit_def_regexp__ = re.compile(r"inherit_defer\s+(.+)" )
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__export_func_regexp__ = re.compile(r"EXPORT_FUNCTIONS\s+(.+)" )
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__addtask_regexp__ = re.compile(r"addtask\s+([^#\n]+)(?P<comment>#.*|.*?)")
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__deltask_regexp__ = re.compile(r"deltask\s+([^#\n]+)(?P<comment>#.*|.*?)")
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__addhandler_regexp__ = re.compile(r"addhandler\s+(.+)" )
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__def_regexp__ = re.compile(r"def\s+(\w+).*:" )
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__python_func_regexp__ = re.compile(r"(\s+.*)|(^$)|(^#)" )
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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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__residue__ = []
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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_defer(expression, fn, lineno, d):
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inherit = (expression, fn, lineno)
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inherits = d.getVar('__BBDEFINHERITS', False) or []
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inherits.append(inherit)
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d.setVar('__BBDEFINHERITS', inherits)
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def inherit(files, fn, lineno, d, deferred=False):
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__inherit_cache = d.getVar('__inherit_cache', False) or []
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#if "${" in files and not deferred:
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# bb.warn("%s:%s has non deferred conditional inherit" % (fn, lineno))
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files = d.expand(files).split()
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for file in files:
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defer = (d.getVar("BB_DEFER_BBCLASSES") or "").split()
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if not deferred and file in defer:
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inherit_defer(file, fn, lineno, d)
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continue
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classtype = d.getVar("__bbclasstype", False)
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origfile = file
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for t in ["classes-" + classtype, "classes"]:
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file = origfile
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if not os.path.isabs(file) and not file.endswith(".bbclass"):
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file = os.path.join(t, '%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 os.path.exists(file):
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break
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if not os.path.exists(file):
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raise ParseError("Could not inherit file %s" % (file), fn, lineno)
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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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try:
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bb.parse.handle(file, d, True)
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except (IOError, OSError) as exc:
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raise ParseError("Could not inherit file %s: %s" % (fn, exc.strerror), fn, lineno)
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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, __residue__, __body__
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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 __residue__:
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raise ParseError("Unparsed lines %s: %s" % (filename, str(__residue__)), filename, lineno)
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if __body__:
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raise ParseError("Unparsed lines from unclosed function %s: %s" % (filename, str(__body__)), filename, lineno)
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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, baseconfig=False):
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global __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 __inpython__, __infunc__, __body__, __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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after = ""
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before = ""
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# This code splits on 'before' and 'after' instead of on whitespace so we can defer
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# evaluation to as late as possible.
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tasks = m.group(1).split(" before ")[0].split(" after ")[0]
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for exp in m.group(1).split(" before "):
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exp2 = exp.split(" after ")
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if len(exp2) > 1:
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after = after + " ".join(exp2[1:])
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for exp in m.group(1).split(" after "):
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exp2 = exp.split(" before ")
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if len(exp2) > 1:
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before = before + " ".join(exp2[1:])
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# Check and warn for having task with a keyword as part of task name
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taskexpression = s.split()
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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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if tasks is not None:
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ast.handleAddTask(statements, fn, lineno, tasks, before, after)
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return
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m = __deltask_regexp__.match(s)
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if m:
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task = m.group(1)
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if task is not None:
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ast.handleDelTask(statements, fn, lineno, task)
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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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m = __inherit_def_regexp__.match(s)
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if m:
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ast.handleInheritDeferred(statements, fn, lineno, m)
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return
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return ConfHandler.feeder(lineno, s, fn, statements, conffile=False)
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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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