--- /dev/null
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Author: Ulf Magnusson
+# https://github.com/ulfalizer/Kconfiglib
+
+# This is Kconfiglib, a Python library for scripting, debugging, and extracting
+# information from Kconfig-based configuration systems. To view the
+# documentation, run
+#
+# $ pydoc kconfiglib
+#
+# or, if you prefer HTML,
+#
+# $ pydoc -w kconfiglib
+#
+# The examples/ subdirectory contains examples, to be run with e.g.
+#
+# $ make scriptconfig SCRIPT=Kconfiglib/examples/print_tree.py
+#
+# Look in testsuite.py for the test suite.
+
+"""
+Kconfiglib is a Python library for scripting and extracting information from
+Kconfig-based configuration systems. Features include the following:
+
+ - Symbol values and properties can be looked up and values assigned
+ programmatically.
+ - .config files can be read and written.
+ - Expressions can be evaluated in the context of a Kconfig configuration.
+ - Relations between symbols can be quickly determined, such as finding all
+ symbols that reference a particular symbol.
+ - Highly compatible with the scripts/kconfig/*conf utilities. The test suite
+ automatically compares outputs between Kconfiglib and the C implementation
+ for a large number of cases.
+
+For the Linux kernel, scripts are run using
+
+ $ make scriptconfig SCRIPT=<path to script> [SCRIPT_ARG=<arg>]
+
+Running scripts via the 'scriptconfig' target ensures that required environment
+variables (SRCARCH, ARCH, srctree, KERNELVERSION, etc.) are set up correctly.
+Alternative architectures can be specified like for other 'make *config'
+targets:
+
+ $ make scriptconfig ARCH=mips SCRIPT=<path to script> [SCRIPT_ARG=<arg>]
+
+The script will receive the name of the Kconfig file to load in sys.argv[1].
+(As of Linux 3.7.0-rc8 this is always "Kconfig" from the kernel top-level
+directory.) If an argument is provided with SCRIPT_ARG, it will appear in
+sys.argv[2].
+
+To get an interactive Python prompt with Kconfiglib preloaded and a Config
+object 'c' created, use
+
+ $ make iscriptconfig [ARCH=<architecture>]
+
+Kconfiglib requires Python 2. For (i)scriptconfig the command to run the Python
+interpreter can be passed in the environment variable PYTHONCMD (defaults to
+'python'; PyPy works too and is a bit faster).
+
+Look in the examples/ subdirectory for examples, which can be run with e.g.
+
+ $ make scriptconfig SCRIPT=Kconfiglib/examples/print_tree.py
+
+or
+
+ $ make scriptconfig SCRIPT=Kconfiglib/examples/help_grep.py SCRIPT_ARG="kernel"
+
+Look in testsuite.py for the test suite.
+
+Credits: Written by Ulf "Ulfalizer" Magnusson
+
+Send bug reports, suggestions and other feedback to kconfiglib@gmail.com .
+Don't wrestle with internal APIs. Tell me what you need and I might add it in a
+safe way as a client API instead."""
+
+# If you have Psyco installed (32-bit installations, Python <= 2.6 only),
+# setting this to True (right here, not at runtime) might give a nice speedup.
+# (22% faster for parsing arch/x86/Kconfig and 58% faster for evaluating all
+# symbols in it without a .config on my Core Duo.)
+use_psyco = False
+
+import os
+import re
+import string
+import sys
+
+class Config():
+
+ """Represents a Kconfig configuration, e.g. for i386 or ARM. This is the
+ set of symbols and other items appearing in the configuration together with
+ their values. Creating any number of Config objects -- including for
+ different architectures -- is safe; Kconfiglib has no global state."""
+
+ #
+ # Public interface
+ #
+
+ def __init__(self,
+ filename = "Kconfig",
+ base_dir = "$srctree",
+ print_warnings = True,
+ print_undef_assign = False):
+ """Creates a new Config object, representing a Kconfig configuration.
+ Raises Kconfig_Syntax_Error on syntax errors.
+
+ filename (default: "Kconfig") -- The base Kconfig file of the
+ configuration. For the Linux kernel, this should usually be be
+ "Kconfig" from the top-level directory, as environment
+ variables will make sure the right Kconfig is included from
+ there (usually arch/<architecture>/Kconfig). If you are using
+ kconfiglib via 'make scriptconfig' the filename of the
+ correct Kconfig will be in sys.argv[1].
+
+ base_dir (default: "$srctree") -- The base directory relative to which
+ 'source' statements within Kconfig files will work. For the
+ Linux kernel this should be the top-level directory of the
+ kernel tree. $-references to environment variables will be
+ expanded.
+
+ The environment variable 'srctree' is set by the Linux makefiles
+ to the top-level kernel directory. A default of "." would not
+ work if an alternative build directory is used.
+
+ print_warnings (default: True) -- Set to True if warnings related to
+ this configuration should be printed to stderr. This can
+ be changed later with Config.set_print_warnings(). It is
+ provided as a constructor argument since warnings might
+ be generated during parsing.
+
+ print_undef_assign (default: False) -- Set to True if informational
+ messages related to assignments to undefined symbols
+ should be printed to stderr for this configuration.
+ Can be changed later with
+ Config.set_print_undef_assign()."""
+
+ # The set of all symbols, indexed by name (a string)
+ self.syms = {}
+
+ # The set of all defined symbols in the configuration in the order they
+ # appear in the Kconfig files. This excludes the special symbols n, m,
+ # and y as well as symbols that are referenced but never defined.
+ self.kconfig_syms = []
+
+ # The set of all named choices (yes, choices can have names), indexed
+ # by name (a string)
+ self.named_choices = {}
+
+ def register_special_symbol(type, name, value):
+ sym = Symbol()
+ sym.is_special_ = True
+ sym.is_defined_ = True
+ sym.config = self
+ sym.name = name
+ sym.type = type
+ sym.cached_value = value
+ self.syms[name] = sym
+ return sym
+
+ # The special symbols n, m and y, used as shorthand for "n", "m" and
+ # "y"
+ self.n = register_special_symbol(TRISTATE, "n", "n")
+ self.m = register_special_symbol(TRISTATE, "m", "m")
+ self.y = register_special_symbol(TRISTATE, "y", "y")
+
+ # DEFCONFIG_LIST uses this
+ register_special_symbol(STRING, "UNAME_RELEASE", os.uname()[2])
+
+ # The symbol with "option defconfig_list" set, containing a list of
+ # default .config files
+ self.defconfig_sym = None
+
+ # See Symbol.get_(src)arch()
+ self.arch = os.environ.get("ARCH")
+ self.srcarch = os.environ.get("SRCARCH")
+
+ # See Config.__init__(). We need this for get_defconfig_filename().
+ self.srctree = os.environ.get("srctree")
+ if self.srctree is None:
+ self.srctree = "."
+
+ self.filename = filename
+ self.base_dir = _strip_trailing_slash(os.path.expandvars(base_dir))
+
+ # The 'mainmenu' text
+ self.mainmenu_text = None
+
+ # The filename of the most recently loaded .config file
+ self.config_filename = None
+
+ # The textual header of the most recently loaded .config, uncommented
+ self.config_header = None
+
+ self.print_warnings = print_warnings
+ self.print_undef_assign = print_undef_assign
+
+ # Lists containing all choices, menus and comments in the configuration
+
+ self.choices = []
+ self.menus = []
+ self.comments = []
+
+ # For parsing routines that stop when finding a line belonging to a
+ # different construct, these holds that line and the tokenized version
+ # of that line. The purpose is to avoid having to re-tokenize the line,
+ # which is inefficient and causes problems when recording references to
+ # symbols.
+ self.end_line = None
+ self.end_line_tokens = None
+
+ # See the comment in _parse_expr().
+ self.parse_expr_cur_sym_or_choice = None
+ self.parse_expr_line = None
+ self.parse_expr_filename = None
+ self.parse_expr_linenr = None
+ self.parse_expr_transform_m = None
+
+ # Parse the Kconfig files
+ self.top_block = self._parse_file(filename, None, None, None)
+
+ # Build Symbol.dep for all symbols
+ self._build_dep()
+
+ def load_config(self, filename, replace = True):
+ """Loads symbol values from a file in the familiar .config format.
+ Equivalent to calling Symbol.set_user_value() to set each of the
+ values.
+
+ filename -- The .config file to load. $-references to environment
+ variables will be expanded. For scripts to work even
+ when an alternative build directory is used with the
+ Linux kernel, you need to refer to the top-level kernel
+ directory with "$srctree".
+
+ replace (default: True) -- True if the configuration should replace
+ the old configuration; False if it should add to it."""
+
+ def warn_override(filename, linenr, name, old_user_val, new_user_val):
+ self._warn("overriding the value of {0}. "
+ 'Old value: "{1}", new value: "{2}".'
+ .format(name, old_user_val, new_user_val),
+ filename,
+ linenr)
+
+ filename = os.path.expandvars(filename)
+
+ # Put this first so that a missing file doesn't screw up our state
+ line_feeder = _FileFeed(_get_lines(filename), filename)
+
+ self.config_filename = filename
+
+ # Invalidate everything. This is usually faster than finding the
+ # minimal set of symbols that needs to be invalidated, as nearly all
+ # symbols will tend to be affected anyway.
+ if replace:
+ self.unset_user_values()
+ else:
+ self._invalidate_all()
+
+ # Read header
+
+ self.config_header = None
+
+ def is_header_line(line):
+ return line.startswith("#") and \
+ not unset_re.match(line)
+
+ first_line = line_feeder.get_next()
+
+ if first_line is None:
+ return
+
+ if not is_header_line(first_line):
+ line_feeder.go_back()
+ else:
+ self.config_header = first_line[1:]
+
+ # Read remaining header lines
+ while 1:
+ line = line_feeder.get_next()
+
+ if line is None:
+ break
+
+ if not is_header_line(line):
+ line_feeder.go_back()
+ break
+
+ self.config_header += line[1:]
+
+ # Remove trailing newline
+ if self.config_header.endswith("\n"):
+ self.config_header = self.config_header[:-1]
+
+ # Read assignments
+
+ filename = line_feeder.get_filename()
+
+ while 1:
+ line = line_feeder.get_next()
+ if line is None:
+ return
+
+ linenr = line_feeder.get_linenr()
+
+ line = line.strip()
+
+ set_re_match = set_re.match(line)
+ if set_re_match:
+ name, val = set_re_match.groups()
+ # The unescaping producedure below should be safe since " can
+ # only appear as \" inside the string
+ val = _strip_quotes(val, line, filename, linenr)\
+ .replace('\\"', '"').replace("\\\\", "\\")
+ if name in self.syms:
+ sym = self.syms[name]
+
+ old_user_val = sym.user_val
+ if old_user_val is not None:
+ warn_override(filename, linenr, name, old_user_val, val)
+
+ if sym.is_choice_symbol_:
+ user_mode = sym.parent.user_mode
+ if user_mode is not None and user_mode != val:
+ self._warn("assignment to {0} changes mode of containing "
+ 'choice from "{1}" to "{2}".'
+ .format(name, val, user_mode),
+ filename,
+ linenr)
+
+ sym._set_user_value_no_invalidate(val, True)
+
+ else:
+ self._undef_assign('attempt to assign the value "{0}" to the '
+ "undefined symbol {1}."
+ .format(val, name),
+ filename,
+ linenr)
+
+ else:
+ unset_re_match = unset_re.match(line)
+ if unset_re_match:
+ name = unset_re_match.group(1)
+ if name in self.syms:
+ sym = self.syms[name]
+
+ old_user_val = sym.user_val
+ if old_user_val is not None:
+ warn_override(filename, linenr, name, old_user_val, "n")
+
+ sym._set_user_value_no_invalidate("n", True)
+
+ def write_config(self, filename, header = None):
+ """Writes out symbol values in the familiar .config format.
+
+ filename -- The filename under which to save the configuration.
+
+ header (default: None) -- A textual header that will appear at the
+ beginning of the file, with each line commented out
+ automatically. None means no header."""
+
+ # already_written is set when _make_conf() is called on a symbol, so
+ # that symbols defined in multiple locations only get one entry in the
+ # .config. We need to reset it prior to writing out a new .config.
+ for sym in self.syms.itervalues():
+ sym.already_written = False
+
+ with open(filename, "w") as f:
+ # Write header
+ if header is not None:
+ f.write(_comment(header))
+ f.write("\n")
+
+ # Write configuration.
+ # (You'd think passing a list around to all the nodes and appending
+ # to it to avoid copying would be faster, but it's actually a lot
+ # slower with PyPy, and about as fast with Python. Passing the file
+ # around is slower too.)
+ f.write("\n".join(self.top_block._make_conf()))
+ f.write("\n")
+
+ def get_kconfig_filename(self):
+ """Returns the name of the (base) kconfig file this configuration was
+ loaded from."""
+ return self.filename
+
+ def get_arch(self):
+ """Returns the value the environment variable ARCH had at the time the
+ Config instance was created, or None if ARCH was not set. For the
+ kernel, this corresponds to the architecture being built for, with
+ values such as "i386" or "mips"."""
+ return self.arch
+
+ def get_srcarch(self):
+ """Returns the value the environment variable SRCARCH had at the time
+ the Config instance was created, or None if SRCARCH was not set. For
+ the kernel, this corresponds to the arch/ subdirectory containing
+ architecture-specific source code."""
+ return self.srcarch
+
+ def get_srctree(self):
+ """Returns the value the environment variable srctree had at the time
+ the Config instance was created, or None if srctree was not defined.
+ This variable points to the source directory and is used when building
+ in a separate directory."""
+ return self.srctree
+
+ def get_config_filename(self):
+ """Returns the name of the most recently loaded configuration file, or
+ None if no configuration has been loaded."""
+ return self.config_filename
+
+ def get_mainmenu_text(self):
+ """Returns the text of the 'mainmenu' statement (with $-references to
+ symbols replaced by symbol values), or None if the configuration has no
+ 'mainmenu' statement."""
+ return None if self.mainmenu_text is None else \
+ self._expand_sym_refs(self.mainmenu_text)
+
+ def get_defconfig_filename(self):
+ """Returns the name of the defconfig file, which is the first existing
+ file in the list given in a symbol having 'option defconfig_list' set.
+ $-references to symbols will be expanded ("$FOO bar" -> "foo bar" if
+ FOO has the value "foo"). Returns None in case of no defconfig file.
+ Setting 'option defconfig_list' on multiple symbols currently results
+ in undefined behavior.
+
+ If the environment variable 'srctree' was set when the Config was
+ created, get_defconfig_filename() will first look relative to that
+ directory before looking in the current directory; see
+ Config.__init__()."""
+
+ if self.defconfig_sym is None:
+ return None
+
+ for (filename, cond_expr) in self.defconfig_sym.def_exprs:
+ if self._eval_expr(cond_expr) == "y":
+ filename = self._expand_sym_refs(filename)
+
+ # We first look in $srctree. os.path.join() won't work here as
+ # an absolute path in filename would override $srctree.
+ srctree_filename = os.path.normpath(self.srctree + "/" + filename)
+ if os.path.exists(srctree_filename):
+ return srctree_filename
+
+ if os.path.exists(filename):
+ return filename
+
+ return None
+
+ def get_symbol(self, name):
+ """Returns the symbol with name 'name', or None if no such symbol
+ appears in the configuration. An alternative shorthand is conf[name],
+ where conf is a Config instance, though that will instead raise
+ KeyError if the symbol does not exist."""
+ return self.syms.get(name)
+
+ def get_top_level_items(self):
+ """Returns a list containing the items (symbols, menus, choice
+ statements and comments) at the top level of the configuration -- that
+ is, all items that do not appear within a menu or choice. The items
+ appear in the same order as within the configuration."""
+ return self.top_block.get_items()
+
+ def get_symbols(self, all_symbols = True):
+ """Returns a list of symbols from the configuration. An alternative for
+ iterating over all defined symbols (in the order of definition) is
+
+ for sym in config:
+ ...
+
+ which relies on Config implementing __iter__() and is equivalent to
+
+ for sym in config.get_symbols(False):
+ ...
+
+ all_symbols (default: True) -- If True, all symbols - including special
+ and undefined symbols - will be included in the result, in
+ an undefined order. If False, only symbols actually defined
+ and not merely referred to in the configuration will be
+ included in the result, and will appear in the order that
+ they are defined within the Kconfig configuration files."""
+ return self.syms.values() if all_symbols else self.kconfig_syms
+
+ def get_choices(self):
+ """Returns a list containing all choice statements in the
+ configuration, in the order they appear in the Kconfig files."""
+ return self.choices
+
+ def get_menus(self):
+ """Returns a list containing all menus in the configuration, in the
+ order they appear in the Kconfig files."""
+ return self.menus
+
+ def get_comments(self):
+ """Returns a list containing all comments in the configuration, in the
+ order they appear in the Kconfig files."""
+ return self.comments
+
+ def eval(self, s):
+ """Returns the value of the expression 's' -- where 's' is represented
+ as a string -- in the context of the configuration. Raises
+ Kconfig_Syntax_Error if syntax errors are detected in 's'.
+
+ For example, if FOO and BAR are tristate symbols at least one of which
+ has the value "y", then config.eval("y && (FOO || BAR)") => "y"
+
+ This functions always yields a tristate value. To get the value of
+ non-bool, non-tristate symbols, use Symbol.get_value().
+
+ The result of this function is consistent with how evaluation works for
+ conditional expressions in the configuration as well as in the C
+ implementation. "m" and m are rewritten as '"m" && MODULES' and 'm &&
+ MODULES', respectively, and a result of "m" will get promoted to "y" if
+ we're running without modules."""
+ return self._eval_expr(self._parse_expr(self._tokenize(s, True), # Feed
+ None, # Current symbol or choice
+ s)) # line
+
+ def get_config_header(self):
+ """Returns the (uncommented) textual header of the .config file most
+ recently loaded with load_config(). Returns None if no .config file has
+ been loaded or if the most recently loaded .config file has no header.
+ The header comprises all lines up to but not including the first line
+ that either
+
+ 1. Does not start with "#"
+ 2. Has the form "# CONFIG_FOO is not set."
+ """
+ return self.config_header
+
+ def get_base_dir(self):
+ """Returns the base directory relative to which 'source' statements
+ will work, passed as an argument to Config.__init__()."""
+ return self.base_dir
+
+ def set_print_warnings(self, print_warnings):
+ """Determines whether warnings related to this configuration (for
+ things like attempting to assign illegal values to symbols with
+ Symbol.set_user_value()) should be printed to stderr.
+
+ print_warnings -- True if warnings should be
+ printed, otherwise False."""
+ self.print_warnings = print_warnings
+
+ def set_print_undef_assign(self, print_undef_assign):
+ """Determines whether informational messages related to assignments to
+ undefined symbols should be printed to stderr for this configuration.
+
+ print_undef_assign -- If True, such messages will be printed."""
+ self.print_undef_assign = print_undef_assign
+
+ def __getitem__(self, key):
+ """Returns the symbol with name 'name'. Raises KeyError if the symbol
+ does not appear in the configuration."""
+ return self.syms[key]
+
+ def __iter__(self):
+ """Convenience function for iterating over the set of all defined
+ symbols in the configuration, used like
+
+ for sym in conf:
+ ...
+
+ The iteration happens in the order of definition within the Kconfig
+ configuration files. Symbols only referred to but not defined will not
+ be included, nor will the special symbols n, m, and y. If you want to
+ include such symbols as well, see config.get_symbols()."""
+ return iter(self.kconfig_syms)
+
+ def unset_user_values(self):
+ """Resets the values of all symbols, as if Config.load_config() or
+ Symbol.set_user_value() had never been called."""
+ for sym in self.syms.itervalues():
+ sym._unset_user_value_no_recursive_invalidate()
+
+ def __str__(self):
+ """Returns a string containing various information about the Config."""
+ return _sep_lines("Configuration",
+ "File : " + self.filename,
+ "Base directory : " + self.base_dir,
+ "Value of $ARCH at creation time : " +
+ ("(not set)" if self.arch is None else self.arch),
+ "Value of $SRCARCH at creation time : " +
+ ("(not set)" if self.srcarch is None else self.srcarch),
+ "Source tree (derived from $srctree;",
+ "defaults to '.' if $srctree isn't set) : " + self.srctree,
+ "Most recently loaded .config : " +
+ ("(no .config loaded)" if self.config_filename is None else
+ self.config_filename),
+ "Print warnings : " +
+ bool_str[self.print_warnings],
+ "Print assignments to undefined symbols : " +
+ bool_str[self.print_undef_assign])
+
+
+ #
+ # Private methods
+ #
+
+ def _invalidate_all(self):
+ for sym in self.syms.itervalues():
+ sym._invalidate()
+
+ def _tokenize(self,
+ s,
+ for_eval = False,
+ filename = None,
+ linenr = None):
+ """Returns a _Feed instance containing tokens derived from the string
+ 's'. Registers any new symbols encountered (via _sym_lookup()).
+
+ (I experimented with a pure regular expression implementation, but it
+ came out slower, less readable, and wouldn't have been as flexible.)
+
+ for_eval -- True when parsing an expression for a call to
+ Config.eval(), in which case we should not treat the first
+ token specially nor register new symbols."""
+ s = s.lstrip()
+ if s == "" or s[0] == "#":
+ return _Feed([])
+
+ if for_eval:
+ i = 0 # The current index in the string being tokenized
+ previous = None # The previous token seen
+ tokens = []
+ else:
+ # The initial word on a line is parsed specially. Let
+ # command_chars = [A-Za-z0-9_]. Then
+ # - leading non-command_chars characters on the line are ignored, and
+ # - the first token consists the following one or more command_chars
+ # characters.
+ # This is why things like "----help--" are accepted.
+
+ initial_token_match = initial_token_re.match(s)
+ if initial_token_match is None:
+ return _Feed([])
+ # The current index in the string being tokenized
+ i = initial_token_match.end()
+
+ keyword = keywords.get(initial_token_match.group(1))
+ if keyword is None:
+ # We expect a keyword as the first token
+ _tokenization_error(s, len(s), filename, linenr)
+ if keyword == T_HELP:
+ # Avoid junk after "help", e.g. "---", being registered as a
+ # symbol
+ return _Feed([T_HELP])
+ tokens = [keyword]
+ previous = keyword
+
+ # _tokenize() is a hotspot during parsing, and this speeds things up a
+ # bit
+ strlen = len(s)
+ append = tokens.append
+
+ # Main tokenization loop. (Handles tokens past the first one.)
+ while i < strlen:
+ # Test for an identifier/keyword preceded by whitespace first; this
+ # is the most common case.
+ id_keyword_match = id_keyword_re.match(s, i)
+ if id_keyword_match:
+ # We have an identifier or keyword. The above also stripped any
+ # whitespace for us.
+ name = id_keyword_match.group(1)
+ # Jump past it
+ i = id_keyword_match.end()
+
+ # Keyword?
+ keyword = keywords.get(name)
+ if keyword is not None:
+ append(keyword)
+ # What would ordinarily be considered a name is treated as a
+ # string after certain tokens.
+ elif previous in string_lex:
+ append(name)
+ else:
+ # We're dealing with a symbol. _sym_lookup() will take care
+ # of allocating a new Symbol instance if it's the first
+ # time we see it.
+ sym = self._sym_lookup(name, not for_eval)
+
+ if previous == T_CONFIG or previous == T_MENUCONFIG:
+ # If the previous token is T_(MENU)CONFIG
+ # ("(menu)config"), we're tokenizing the first line of
+ # a symbol definition, and should remember this as a
+ # location where the symbol is defined.
+ sym.def_locations.append((filename, linenr))
+ else:
+ # Otherwise, it's a reference to the symbol
+ sym.ref_locations.append((filename, linenr))
+
+ append(sym)
+
+ else:
+ # This restrips whitespace that could have been stripped in the
+ # regex above, but it's worth it since identifiers/keywords are
+ # more common
+ s = s[i:].lstrip()
+ if s == "":
+ break
+ strlen = len(s)
+ i = 0
+ c = s[0]
+
+ # String literal (constant symbol)
+ if c == '"' or c == "'":
+ i += 1
+
+ if "\\" in s:
+ # Slow path: This could probably be sped up, but it's a
+ # very unusual case anyway.
+ quote = c
+ value = ""
+ while 1:
+ if i >= strlen:
+ _tokenization_error(s, strlen, filename,
+ linenr)
+ c = s[i]
+ if c == quote:
+ break
+ if c == "\\":
+ if i + 1 >= strlen:
+ _tokenization_error(s, strlen, filename,
+ linenr)
+ value += s[i + 1]
+ i += 2
+ else:
+ value += c
+ i += 1
+ i += 1
+ append(value)
+ else:
+ # Fast path: If the string contains no backslashes (almost
+ # always) we can simply look for the matching quote.
+ end = s.find(c, i)
+ if end == -1:
+ _tokenization_error(s, strlen, filename, linenr)
+ append(s[i:end])
+ i = end + 1
+
+ elif c == "&":
+ if i + 1 >= strlen:
+ # Invalid characters are ignored
+ continue
+ if s[i + 1] != "&":
+ # Invalid characters are ignored
+ i += 1
+ continue
+ append(T_AND)
+ i += 2
+
+ elif c == "|":
+ if i + 1 >= strlen:
+ # Invalid characters are ignored
+ continue
+ if s[i + 1] != "|":
+ # Invalid characters are ignored
+ i += 1
+ continue
+ append(T_OR)
+ i += 2
+
+ elif c == "!":
+ if i + 1 >= strlen:
+ _tokenization_error(s, strlen, filename, linenr)
+ if s[i + 1] == "=":
+ append(T_UNEQUAL)
+ i += 2
+ else:
+ append(T_NOT)
+ i += 1
+
+ elif c == "=":
+ append(T_EQUAL)
+ i += 1
+
+ elif c == "(":
+ append(T_OPEN_PAREN)
+ i += 1
+
+ elif c == ")":
+ append(T_CLOSE_PAREN)
+ i += 1
+
+ elif c == "#":
+ break
+
+ else:
+ # Invalid characters are ignored
+ i += 1
+ continue
+
+ previous = tokens[-1]
+
+ return _Feed(tokens)
+
+ #
+ # Parsing
+ #
+
+ # Expression grammar:
+ #
+ # <expr> -> <symbol>
+ # <symbol> '=' <symbol>
+ # <symbol> '!=' <symbol>
+ # '(' <expr> ')'
+ # '!' <expr>
+ # <expr> '&&' <expr>
+ # <expr> '||' <expr>
+
+ def _parse_expr(self,
+ feed,
+ cur_sym_or_choice,
+ line,
+ filename = None,
+ linenr = None,
+ transform_m = True):
+ """Parse an expression from the tokens in 'feed' using a simple
+ top-down approach. The result has the form (<operator>, <list
+ containing parsed operands>).
+
+ feed -- _Feed instance containing the tokens for the expression.
+
+ cur_sym_or_choice -- The symbol or choice currently being parsed, or
+ None if we're not parsing a symbol or choice.
+ Used for recording references to symbols.
+
+ line -- The line containing the expression being parsed.
+
+ filename (default: None) -- The file containing the expression.
+
+ linenr (default: None) -- The line number containing the expression.
+
+ transform_m (default: False) -- Determines if 'm' should be rewritten to
+ 'm && MODULES' -- see
+ parse_val_and_cond()."""
+
+ # Use instance variables to avoid having to pass these as arguments
+ # through the top-down parser in _parse_expr_2(), which is tedious and
+ # obfuscates the code. A profiler run shows no noticeable performance
+ # difference.
+ self.parse_expr_cur_sym_or_choice = cur_sym_or_choice
+ self.parse_expr_line = line
+ self.parse_expr_filename = filename
+ self.parse_expr_linenr = linenr
+ self.parse_expr_transform_m = transform_m
+
+ return self._parse_expr_2(feed)
+
+ def _parse_expr_2(self, feed):
+ or_terms = [self._parse_or_term(feed)]
+ # Keep parsing additional terms while the lookahead is '||'
+ while feed.check(T_OR):
+ or_terms.append(self._parse_or_term(feed))
+
+ return or_terms[0] if len(or_terms) == 1 else (OR, or_terms)
+
+ def _parse_or_term(self, feed):
+ and_terms = [self._parse_factor(feed)]
+ # Keep parsing additional terms while the lookahead is '&&'
+ while feed.check(T_AND):
+ and_terms.append(self._parse_factor(feed))
+
+ return and_terms[0] if len(and_terms) == 1 else (AND, and_terms)
+
+ def _parse_factor(self, feed):
+ if feed.check(T_OPEN_PAREN):
+ expr_parse = self._parse_expr_2(feed)
+
+ if not feed.check(T_CLOSE_PAREN):
+ _parse_error(self.parse_expr_line,
+ "missing end parenthesis.",
+ self.parse_expr_filename,
+ self.parse_expr_linenr)
+
+ return expr_parse
+
+ if feed.check(T_NOT):
+ return (NOT, self._parse_factor(feed))
+
+ sym_or_string = feed.get_next()
+
+ if not isinstance(sym_or_string, (Symbol, str)):
+ _parse_error(self.parse_expr_line,
+ "malformed expression.",
+ self.parse_expr_filename,
+ self.parse_expr_linenr)
+
+ if self.parse_expr_cur_sym_or_choice is not None and \
+ isinstance(sym_or_string, Symbol):
+ self.parse_expr_cur_sym_or_choice.referenced_syms.add(sym_or_string)
+
+ next_token = feed.peek_next()
+
+ # For conditional expressions ('depends on <expr>', '... if <expr>',
+ # etc.), "m" and m are rewritten to "m" && MODULES.
+ if next_token != T_EQUAL and next_token != T_UNEQUAL:
+ if self.parse_expr_transform_m and (sym_or_string is self.m or
+ sym_or_string == "m"):
+ return (AND, ["m", self._sym_lookup("MODULES")])
+ return sym_or_string
+
+ relation = EQUAL if (feed.get_next() == T_EQUAL) else UNEQUAL
+ sym_or_string_2 = feed.get_next()
+
+ if self.parse_expr_cur_sym_or_choice is not None and \
+ isinstance(sym_or_string_2, Symbol):
+ self.parse_expr_cur_sym_or_choice.referenced_syms.add(sym_or_string_2)
+
+ if sym_or_string is self.m:
+ sym_or_string = "m"
+
+ if sym_or_string_2 is self.m:
+ sym_or_string_2 = "m"
+
+ return (relation, sym_or_string, sym_or_string_2)
+
+ def _parse_file(self, filename, parent, deps, visible_if_deps, res = None):
+ """Parse the Kconfig file 'filename'. The result is a _Block with all
+ items from the file. See _parse_block() for the meaning of the
+ parameters."""
+ line_feeder = _FileFeed(_get_lines(filename), filename)
+ return self._parse_block(line_feeder, None, parent, deps, visible_if_deps, res)
+
+ def _parse_block(self, line_feeder, end_marker, parent, deps,
+ visible_if_deps = None, res = None):
+ """Parses a block, which is the contents of either a file or an if,
+ menu, or choice statement. The result is a _Block with the items from
+ the block.
+
+ end_marker -- The token that ends the block, e.g. T_ENDIF ("endif") for
+ if's. None for files.
+
+ parent -- The enclosing menu, choice or if, or None if we're at the top
+ level.
+
+ deps -- Dependencies from enclosing menus, choices and if's.
+
+ visible_if_deps (default: None) -- 'visible if' dependencies from
+ enclosing menus.
+
+ res (default: None) -- The _Block to add items to. If None, a new
+ _Block is created to hold the items."""
+
+ block = _Block() if res is None else res
+
+ filename = line_feeder.get_filename()
+
+ while 1:
+
+ # Do we already have a tokenized line that we determined wasn't
+ # part of whatever we were parsing earlier? See comment in
+ # Config.__init__().
+ if self.end_line is not None:
+ assert self.end_line_tokens is not None
+ tokens = self.end_line_tokens
+ tokens.go_to_start()
+
+ line = self.end_line
+ linenr = line_feeder.get_linenr()
+
+ self.end_line = None
+ self.end_line_tokens = None
+
+ else:
+ line = line_feeder.get_next()
+ if line is None:
+ if end_marker is not None:
+ raise Kconfig_Syntax_Error, (
+ "Unexpected end of file {0}."
+ .format(line_feeder.get_filename()))
+ return block
+
+ linenr = line_feeder.get_linenr()
+
+ tokens = self._tokenize(line, False, filename, linenr)
+
+ if tokens.is_empty():
+ continue
+
+ t0 = tokens.get_next()
+
+ # Have we reached the end of the block?
+ if t0 == end_marker:
+ return block
+
+ if t0 == T_CONFIG or t0 == T_MENUCONFIG:
+ # The tokenizer will automatically allocate a new Symbol object
+ # for any new names it encounters, so we don't need to worry
+ # about that here.
+ sym = tokens.get_next()
+
+ # Symbols defined in multiple places get the parent of their
+ # first definition. However, for symbols whose parents are choice
+ # statements, the choice statement takes precedence.
+ if not sym.is_defined_ or isinstance(parent, Choice):
+ sym.parent = parent
+
+ sym.is_defined_ = True
+
+ self.kconfig_syms.append(sym)
+ block.add_item(sym)
+
+ self._parse_properties(line_feeder, sym, deps, visible_if_deps)
+
+ elif t0 == T_MENU:
+ menu = Menu()
+ self.menus.append(menu)
+ menu.config = self
+ menu.parent = parent
+ menu.title = tokens.get_next()
+
+ menu.filename = filename
+ menu.linenr = linenr
+
+ # Parse properties and contents
+ self._parse_properties(line_feeder, menu, deps, visible_if_deps)
+ menu.block = self._parse_block(line_feeder,
+ T_ENDMENU,
+ menu,
+ menu.dep_expr,
+ _make_and(visible_if_deps,
+ menu.visible_if_expr))
+
+ block.add_item(menu)
+
+ elif t0 == T_IF:
+ # If statements are treated as syntactic sugar for adding
+ # dependencies to enclosed items and do not have an explicit
+ # object representation.
+
+ dep_expr = self._parse_expr(tokens, None, line, filename, linenr)
+ self._parse_block(line_feeder,
+ T_ENDIF,
+ parent,
+ _make_and(dep_expr, deps),
+ visible_if_deps,
+ block) # Add items to the same block
+
+ elif t0 == T_CHOICE:
+ # We support named choices
+ already_defined = False
+ name = None
+ if len(tokens) > 1 and isinstance(tokens[1], str):
+ name = tokens[1]
+ already_defined = name in self.named_choices
+
+ if already_defined:
+ choice = self.named_choices[name]
+ else:
+ choice = Choice()
+ self.choices.append(choice)
+ if name is not None:
+ choice.name = name
+ self.named_choices[name] = choice
+
+ choice.config = self
+ choice.parent = parent
+
+ choice.def_locations.append((filename, linenr))
+
+ # Parse properties and contents
+ self._parse_properties(line_feeder, choice, deps, visible_if_deps)
+ choice.block = self._parse_block(line_feeder,
+ T_ENDCHOICE,
+ choice,
+ None,
+ visible_if_deps)
+
+ choice._determine_actual_symbols()
+
+ # If no type is set for the choice, its type is that of the first
+ # choice item
+ if choice.type == UNKNOWN:
+ for item in choice.get_symbols():
+ if item.type != UNKNOWN:
+ choice.type = item.type
+ break
+
+ # Each choice item of UNKNOWN type gets the type of the choice
+ for item in choice.get_symbols():
+ if item.type == UNKNOWN:
+ item.type = choice.type
+
+ # For named choices defined in multiple locations, only record
+ # at the first definition
+ if not already_defined:
+ block.add_item(choice)
+
+ elif t0 == T_COMMENT:
+ comment = Comment()
+ comment.config = self
+ comment.parent = parent
+
+ comment.filename = filename
+ comment.linenr = linenr
+
+ comment.text = tokens.get_next()
+ self._parse_properties(line_feeder, comment, deps, visible_if_deps)
+
+ block.add_item(comment)
+ self.comments.append(comment)
+
+ elif t0 == T_SOURCE:
+ kconfig_file = tokens.get_next()
+ exp_kconfig_file = self._expand_sym_refs(kconfig_file)
+ f = os.path.join(self.base_dir, exp_kconfig_file)
+
+ if not os.path.exists(f):
+ raise IOError, ('{0}:{1}: sourced file "{2}" (expands to\n'
+ '"{3}") not found. Perhaps base_dir\n'
+ '(argument to Config.__init__(), currently\n'
+ '"{4}") is set to the wrong value.'
+ .format(filename,
+ linenr,
+ kconfig_file,
+ exp_kconfig_file,
+ self.base_dir))
+
+ # Add items to the same block
+ self._parse_file(f, parent, deps, visible_if_deps, block)
+
+ elif t0 == T_MAINMENU:
+ text = tokens.get_next()
+
+ if self.mainmenu_text is not None:
+ self._warn("overriding 'mainmenu' text. "
+ 'Old value: "{0}", new value: "{1}".'
+ .format(self.mainmenu_text, text),
+ filename,
+ linenr)
+
+ self.mainmenu_text = text
+
+ else:
+ _parse_error(line, "unrecognized construct.", filename, linenr)
+
+ def _parse_properties(self, line_feeder, stmt, deps, visible_if_deps):
+ """Parsing of properties for symbols, menus, choices, and comments."""
+
+ def parse_val_and_cond(tokens, line, filename, linenr):
+ """Parses '<expr1> if <expr2>' constructs, where the 'if' part is
+ optional. Returns a tuple containing the parsed expressions, with
+ None as the second element if the 'if' part is missing."""
+ val = self._parse_expr(tokens, stmt, line, filename, linenr, False)
+
+ if tokens.check(T_IF):
+ return (val, self._parse_expr(tokens, stmt, line, filename, linenr))
+
+ return (val, None)
+
+ # In case the symbol is defined in multiple locations, we need to
+ # remember what prompts, defaults, and selects are new for this
+ # definition, as "depends on" should only apply to the local
+ # definition.
+ new_prompt = None
+ new_def_exprs = []
+ new_selects = []
+
+ # Dependencies from 'depends on' statements
+ depends_on_expr = None
+
+ while 1:
+ line = line_feeder.get_next()
+ if line is None:
+ break
+
+ filename = line_feeder.get_filename()
+ linenr = line_feeder.get_linenr()
+
+ tokens = self._tokenize(line, False, filename, linenr)
+
+ if tokens.is_empty():
+ continue
+
+ t0 = tokens.get_next()
+
+ if t0 == T_HELP:
+ # Find first non-empty line and get its indentation
+
+ line_feeder.remove_while(str.isspace)
+ line = line_feeder.get_next()
+
+ if line is None:
+ stmt.help = ""
+ break
+
+ indent = _indentation(line)
+
+ # If the first non-empty lines has zero indent, there is no
+ # help text
+ if indent == 0:
+ stmt.help = ""
+ line_feeder.go_back()
+ break
+
+ help_lines = [_deindent(line, indent)]
+
+ # The help text goes on till the first non-empty line with less
+ # indent
+ while 1:
+ line = line_feeder.get_next()
+ if (line is None) or \
+ (not line.isspace() and _indentation(line) < indent):
+ stmt.help = "".join(help_lines)
+ break
+
+ help_lines.append(_deindent(line, indent))
+
+ if line is None:
+ break
+
+ line_feeder.go_back()
+
+ elif t0 == T_PROMPT:
+ # 'prompt' properties override each other within a single
+ # definition of a symbol, but additional prompts can be added
+ # by defining the symbol multiple times; hence 'new_prompt'
+ # instead of 'prompt'.
+ new_prompt = parse_val_and_cond(tokens, line, filename, linenr)
+
+ elif t0 == T_DEFAULT:
+ new_def_exprs.append(parse_val_and_cond(tokens, line, filename, linenr))
+
+ elif t0 == T_DEPENDS:
+ if not tokens.check(T_ON):
+ _parse_error(line, 'expected "on" after "depends".', filename, linenr)
+
+ parsed_deps = self._parse_expr(tokens, stmt, line, filename, linenr)
+
+ if isinstance(stmt, (Menu, Comment)):
+ stmt.dep_expr = _make_and(stmt.dep_expr, parsed_deps)
+ else:
+ depends_on_expr = _make_and(depends_on_expr, parsed_deps)
+
+ elif t0 == T_VISIBLE:
+ if not tokens.check(T_IF):
+ _parse_error(line, 'expected "if" after "visible".', filename, linenr)
+ if not isinstance(stmt, Menu):
+ _parse_error(line,
+ "'visible if' is only valid for menus.",
+ filename,
+ linenr)
+
+ parsed_deps = self._parse_expr(tokens, stmt, line, filename, linenr)
+ stmt.visible_if_expr = _make_and(stmt.visible_if_expr, parsed_deps)
+
+ elif t0 == T_SELECT:
+ target = tokens.get_next()
+
+ stmt.referenced_syms.add(target)
+ stmt.selected_syms.add(target)
+
+ if tokens.check(T_IF):
+ new_selects.append((target,
+ self._parse_expr(tokens, stmt, line, filename, linenr)))
+ else:
+ new_selects.append((target, None))
+
+ elif t0 in (T_BOOL, T_TRISTATE, T_INT, T_HEX, T_STRING):
+ stmt.type = token_to_type[t0]
+
+ if len(tokens) > 1:
+ new_prompt = parse_val_and_cond(tokens, line, filename, linenr)
+
+ elif t0 == T_RANGE:
+ lower = tokens.get_next()
+ upper = tokens.get_next()
+ stmt.referenced_syms.add(lower)
+ stmt.referenced_syms.add(upper)
+
+ if tokens.check(T_IF):
+ stmt.ranges.append((lower, upper,
+ self._parse_expr(tokens, stmt, line, filename, linenr)))
+ else:
+ stmt.ranges.append((lower, upper, None))
+
+ elif t0 == T_DEF_BOOL:
+ stmt.type = BOOL
+
+ if len(tokens) > 1:
+ new_def_exprs.append(parse_val_and_cond(tokens, line, filename, linenr))
+
+ elif t0 == T_DEF_TRISTATE:
+ stmt.type = TRISTATE
+
+ if len(tokens) > 1:
+ new_def_exprs.append(parse_val_and_cond(tokens, line, filename, linenr))
+
+ elif t0 == T_OPTIONAL:
+ if not isinstance(stmt, Choice):
+ _parse_error(line,
+ '"optional" is only valid for choices.',
+ filename,
+ linenr)
+ stmt.optional = True
+
+ elif t0 == T_OPTION:
+ if tokens.check(T_ENV) and tokens.check(T_EQUAL):
+ env_var = tokens.get_next()
+
+ stmt.is_special_ = True
+ stmt.is_from_env = True
+
+ if env_var not in os.environ:
+ self._warn("""
+The symbol {0} references the non-existent environment variable {1} and will
+get the empty string as its value.
+
+If you're using kconfiglib via 'make (i)scriptconfig' it should have set up the
+environment correctly for you. If you still got this message, that might be an
+error, and you should e-mail kconfiglib@gmail.com.
+.""" .format(stmt.name, env_var),
+ filename,
+ linenr)
+
+ stmt.cached_value = ""
+ else:
+ stmt.cached_value = os.environ[env_var]
+
+ elif tokens.check(T_DEFCONFIG_LIST):
+ self.defconfig_sym = stmt
+
+ elif tokens.check(T_MODULES):
+ self._warn("the 'modules' option is not supported. "
+ "Let me know if this is a problem for you; "
+ "it shouldn't be that hard to implement.",
+ filename,
+ linenr)
+
+ else:
+ _parse_error(line, "unrecognized option.", filename, linenr)
+
+ else:
+ # See comment in Config.__init__()
+ self.end_line = line
+ self.end_line_tokens = tokens
+ break
+
+ # Propagate dependencies from enclosing menus and if's.
+
+ # For menus and comments..
+ if isinstance(stmt, (Menu, Comment)):
+ stmt.orig_deps = stmt.dep_expr
+ stmt.deps_from_containing = deps
+ stmt.dep_expr = _make_and(stmt.dep_expr, deps)
+
+ stmt.all_referenced_syms = \
+ stmt.referenced_syms | _get_expr_syms(deps)
+
+ # For symbols and choices..
+ else:
+
+ # See comment for 'menu_dep'
+ stmt.menu_dep = depends_on_expr
+
+ # Propagate dependencies specified with 'depends on' to any new
+ # default expressions, prompts, and selections. ("New" since a
+ # symbol might be defined in multiple places and the dependencies
+ # should only apply to the local definition.)
+
+ new_def_exprs = [(val_expr, _make_and(cond_expr, depends_on_expr))
+ for (val_expr, cond_expr) in new_def_exprs]
+
+ new_selects = [(target, _make_and(cond_expr, depends_on_expr))
+ for (target, cond_expr) in new_selects]
+
+ if new_prompt is not None:
+ prompt, cond_expr = new_prompt
+
+ # 'visible if' dependencies from enclosing menus get propagated
+ # to prompts
+ if visible_if_deps is not None:
+ cond_expr = _make_and(cond_expr, visible_if_deps)
+
+ new_prompt = (prompt, _make_and(cond_expr, depends_on_expr))
+
+ # We save the original expressions -- before any menu and if
+ # conditions have been propagated -- so these can be retrieved
+ # later.
+
+ stmt.orig_def_exprs.extend(new_def_exprs)
+ if new_prompt is not None:
+ stmt.orig_prompts.append(new_prompt)
+
+ # Only symbols can select
+ if isinstance(stmt, Symbol):
+ stmt.orig_selects.extend(new_selects)
+
+ # Save dependencies from enclosing menus and if's
+ stmt.deps_from_containing = deps
+
+ # The set of symbols referenced directly by the symbol/choice plus
+ # all symbols referenced by enclosing menus and if's.
+ stmt.all_referenced_syms = \
+ stmt.referenced_syms | _get_expr_syms(deps)
+
+ # Propagate dependencies from enclosing menus and if's
+
+ stmt.def_exprs.extend([(val_expr, _make_and(cond_expr, deps))
+ for (val_expr, cond_expr) in new_def_exprs])
+
+ for (target, cond) in new_selects:
+ target.rev_dep = _make_or(target.rev_dep,
+ _make_and(stmt,
+ _make_and(cond, deps)))
+
+ if new_prompt is not None:
+ prompt, cond_expr = new_prompt
+ stmt.prompts.append((prompt, _make_and(cond_expr, deps)))
+
+ #
+ # Symbol table manipulation
+ #
+
+ def _sym_lookup(self, name, add_sym_if_not_exists = True):
+ """Fetches the symbol 'name' from the symbol table, optionally adding
+ it if it does not exist (this is usually what we want)."""
+ if name in self.syms:
+ return self.syms[name]
+
+ new_sym = Symbol()
+ new_sym.config = self
+ new_sym.name = name
+
+ if add_sym_if_not_exists:
+ self.syms[name] = new_sym
+ else:
+ # This warning is generated while evaluating an expression
+ # containing undefined symbols using Config.eval()
+ self._warn("no symbol {0} in configuration".format(name))
+
+ return new_sym
+
+ #
+ # Evaluation of symbols and expressions
+ #
+
+ def _eval_expr(self, expr):
+ """Evaluates an expression and returns one of the tristate values "n",
+ "m" or "y"."""
+ res = self._eval_expr_2(expr)
+
+ # Promote "m" to "y" if we're running without modules. Internally, "m"
+ # is often rewritten to "m" && MODULES by both the C implementation and
+ # kconfiglib, which takes care of cases where "m" should be false if
+ # we're running without modules.
+ if res == "m" and not self._has_modules():
+ return "y"
+
+ return res
+
+ def _eval_expr_2(self, expr):
+ if expr is None:
+ return "y"
+
+ if isinstance(expr, Symbol):
+ # Non-bool/tristate symbols are always "n" in a tristate sense,
+ # regardless of their value
+ if expr.type != BOOL and expr.type != TRISTATE:
+ return "n"
+ return expr.get_value()
+
+ if isinstance(expr, str):
+ return expr if (expr == "y" or expr == "m") else "n"
+
+ first_expr = expr[0]
+
+ if first_expr == OR:
+ res = "n"
+
+ for subexpr in expr[1]:
+ ev = self._eval_expr_2(subexpr)
+
+ # Return immediately upon discovering a "y" term
+ if ev == "y":
+ return "y"
+
+ if ev == "m":
+ res = "m"
+
+ # 'res' is either "n" or "m" here; we already handled the
+ # short-circuiting "y" case in the loop.
+ return res
+
+ if first_expr == AND:
+ res = "y"
+
+ for subexpr in expr[1]:
+ ev = self._eval_expr_2(subexpr)
+
+ # Return immediately upon discovering an "n" term
+ if ev == "n":
+ return "n"
+
+ if ev == "m":
+ res = "m"
+
+ # 'res' is either "m" or "y" here; we already handled the
+ # short-circuiting "n" case in the loop.
+ return res
+
+ if first_expr == NOT:
+ ev = self._eval_expr_2(expr[1])
+
+ if ev == "y":
+ return "n"
+
+ return "y" if (ev == "n") else "m"
+
+ if first_expr == EQUAL:
+ return "y" if (self._get_str_value(expr[1]) ==
+ self._get_str_value(expr[2])) else "n"
+
+ if first_expr == UNEQUAL:
+ return "y" if (self._get_str_value(expr[1]) !=
+ self._get_str_value(expr[2])) else "n"
+
+ _internal_error("Internal error while evaluating expression: "
+ "unknown operation {0}.".format(first_expr))
+
+ def _get_str_value(self, obj):
+ if isinstance(obj, str):
+ return obj
+ # obj is a Symbol
+ return obj.get_value()
+
+ def _eval_min(self, e1, e2):
+ e1_eval = self._eval_expr(e1)
+ e2_eval = self._eval_expr(e2)
+
+ return e1_eval if tri_less(e1_eval, e2_eval) else e2_eval
+
+ def _eval_max(self, e1, e2):
+ e1_eval = self._eval_expr(e1)
+ e2_eval = self._eval_expr(e2)
+
+ return e1_eval if tri_greater(e1_eval, e2_eval) else e2_eval
+
+ #
+ # Methods related to the MODULES symbol
+ #
+
+ def _has_modules(self):
+ modules_sym = self.syms.get("MODULES")
+ return (modules_sym is not None) and (modules_sym.get_value() == "y")
+
+ #
+ # Dependency tracking
+ #
+
+ def _build_dep(self):
+ """Populates the Symbol.dep sets, linking the symbol to the symbols
+ that immediately depend on it in the sense that changing the value of
+ the symbol might affect the values of those other symbols. This is used
+ for caching/invalidation purposes. The calculated sets might be larger
+ than necessary as we don't do any complicated analysis of the
+ expressions."""
+ for sym in self.syms.itervalues():
+ sym.dep = set()
+
+ # Adds 'sym' as a directly dependent symbol to all symbols that appear
+ # in the expression 'e'
+ def add_expr_deps(e, sym):
+ for s in _get_expr_syms(e):
+ s.dep.add(sym)
+
+ # The directly dependent symbols of a symbol are:
+ # - Any symbols whose prompts, default values, rev_dep (select
+ # condition), or ranges depend on the symbol
+ # - Any symbols that belong to the same choice statement as the symbol
+ # (these won't be included in 'dep' as that makes the dependency
+ # graph unwieldy, but Symbol._get_dependent() will include them)
+ # - Any symbols in a choice statement that depends on the symbol
+ for sym in self.syms.itervalues():
+ for (_, e) in sym.prompts:
+ add_expr_deps(e, sym)
+
+ for (v, e) in sym.def_exprs:
+ add_expr_deps(v, sym)
+ add_expr_deps(e, sym)
+
+ add_expr_deps(sym.rev_dep, sym)
+
+ for (l, u, e) in sym.ranges:
+ add_expr_deps(l, sym)
+ add_expr_deps(u, sym)
+ add_expr_deps(e, sym)
+
+ if sym.is_choice_symbol_:
+ choice = sym.parent
+
+ for (_, e) in choice.prompts:
+ add_expr_deps(e, sym)
+
+ for (_, e) in choice.def_exprs:
+ add_expr_deps(e, sym)
+
+ def _expr_val_str(self, expr, no_value_str = "(none)", get_val_instead_of_eval = False):
+ # Since values are valid expressions, _expr_to_str() will get a nice
+ # string representation for those as well.
+
+ if expr is None:
+ return no_value_str
+
+ if get_val_instead_of_eval:
+ if isinstance(expr, str):
+ return _expr_to_str(expr)
+ val = expr.get_value()
+ else:
+ val = self._eval_expr(expr)
+
+ return "{0} (value: {1})".format(_expr_to_str(expr), _expr_to_str(val))
+
+ def _expand_sym_refs(self, s):
+ """Expands $-references to symbols in 's' to symbol values, or to the
+ empty string for undefined symbols."""
+
+ while 1:
+ sym_ref_re_match = sym_ref_re.search(s)
+ if sym_ref_re_match is None:
+ return s
+
+ sym_name = sym_ref_re_match.group(0)[1:]
+ sym = self.syms.get(sym_name)
+ expansion = "" if sym is None else sym.get_value()
+
+ s = s[:sym_ref_re_match.start()] + \
+ expansion + \
+ s[sym_ref_re_match.end():]
+
+ def _get_sym_or_choice_str(self, sc):
+ """Symbols and choices have many properties in common, so we factor out
+ common __str__() stuff here. "sc" is short for "symbol or choice"."""
+
+ # As we deal a lot with string representations here, use some
+ # convenient shorthand:
+ s = _expr_to_str
+
+ #
+ # Common symbol/choice properties
+ #
+
+ user_value_str = "(no user value)" if sc.user_val is None else s(sc.user_val)
+
+ visibility_str = s(sc.get_visibility())
+
+ # Build prompts string
+ if sc.prompts == []:
+ prompts_str = " (no prompts)"
+ else:
+ prompts_str_rows = []
+
+ for (prompt, cond_expr) in sc.orig_prompts:
+ if cond_expr is None:
+ prompts_str_rows.append(' "{0}"'.format(prompt))
+ else:
+ prompts_str_rows.append(' "{0}" if '.format(prompt) +
+ self._expr_val_str(cond_expr))
+
+ prompts_str = "\n".join(prompts_str_rows)
+
+ # Build locations string
+ if sc.def_locations == []:
+ locations_str = "(no locations)"
+ else:
+ locations_str = " ".join(["{0}:{1}".format(filename, linenr) for
+ (filename, linenr) in sc.def_locations])
+
+ # Build additional-dependencies-from-menus-and-if's string
+ additional_deps_str = " " + self._expr_val_str(sc.deps_from_containing,
+ "(no additional dependencies)")
+
+ #
+ # Symbol-specific stuff
+ #
+
+ if isinstance(sc, Symbol):
+
+ # Build value string
+ value_str = s(sc.get_value())
+
+ # Build ranges string
+ if isinstance(sc, Symbol):
+ if sc.ranges == []:
+ ranges_str = " (no ranges)"
+ else:
+ ranges_str_rows = []
+
+ for (l, u, cond_expr) in sc.ranges:
+ if cond_expr is None:
+ ranges_str_rows.append(" [{0}, {1}]".format(s(l), s(u)))
+ else:
+ ranges_str_rows.append(" [{0}, {1}] if {2}"
+ .format(s(l), s(u), self._expr_val_str(cond_expr)))
+
+ ranges_str = "\n".join(ranges_str_rows)
+
+ # Build default values string
+ if sc.def_exprs == []:
+ defaults_str = " (no default values)"
+ else:
+ defaults_str_rows = []
+
+ for (val_expr, cond_expr) in sc.orig_def_exprs:
+ row_str = " " + self._expr_val_str(val_expr, "(none)", sc.type == STRING)
+ defaults_str_rows.append(row_str)
+ defaults_str_rows.append(" Condition: " + self._expr_val_str(cond_expr))
+
+ defaults_str = "\n".join(defaults_str_rows)
+
+ # Build selects string
+ if sc.orig_selects == []:
+ selects_str = " (no selects)"
+ else:
+ selects_str_rows = []
+
+ for (target, cond_expr) in sc.orig_selects:
+ if cond_expr is None:
+ selects_str_rows.append(" {0}".format(target.name))
+ else:
+ selects_str_rows.append(" {0} if ".format(target.name) +
+ self._expr_val_str(cond_expr))
+
+ selects_str = "\n".join(selects_str_rows)
+
+ # Build reverse dependencies string
+ if sc.rev_dep == "n":
+ rev_dep_str = " (no reverse dependencies)"
+ else:
+ rev_dep_str = " " + self._expr_val_str(sc.rev_dep)
+
+ res = _sep_lines("Symbol " + (sc.name if sc.name is not None else "(no name)"),
+ "Type : " + typename[sc.type],
+ "Value : " + value_str,
+ "User value : " + user_value_str,
+ "Visibility : " + visibility_str,
+ "Is choice item : " + bool_str[sc.is_choice_symbol_],
+ "Is defined : " + bool_str[sc.is_defined_],
+ "Is from env. : " + bool_str[sc.is_from_env],
+ "Is special : " + bool_str[sc.is_special_] + "\n")
+
+ if sc.ranges != []:
+ res += _sep_lines("Ranges:",
+ ranges_str + "\n")
+
+ res += _sep_lines("Prompts:",
+ prompts_str,
+ "Default values:",
+ defaults_str,
+ "Selects:",
+ selects_str,
+ "Reverse dependencies:",
+ rev_dep_str,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Locations: " + locations_str)
+
+ return res
+
+ #
+ # Choice-specific stuff
+ #
+
+ # Build name string (for named choices)
+ if sc.name is None:
+ name_str = "(no name)"
+ else:
+ name_str = sc.name
+
+ # Build selected symbol string
+ sel = sc.get_selection()
+ if sel is None:
+ sel_str = "(no selection)"
+ else:
+ sel_str = sel.name
+
+ # Build mode string
+ mode_str = s(sc.get_mode())
+
+ # Build default values string
+ if sc.def_exprs == []:
+ defaults_str = " (no default values)"
+ else:
+ defaults_str_rows = []
+
+ for (sym, cond_expr) in sc.orig_def_exprs:
+ if cond_expr is None:
+ defaults_str_rows.append(" {0}".format(sym.name))
+ else:
+ defaults_str_rows.append(" {0} if ".format(sym.name) +
+ self._expr_val_str(cond_expr))
+
+ defaults_str = "\n".join(defaults_str_rows)
+
+ # Build contained symbols string
+ names = [sym.name for sym in sc.get_symbols()]
+
+ if names == []:
+ syms_string = "(empty)"
+ else:
+ syms_string = " ".join(names)
+
+ return _sep_lines("Choice",
+ "Name (for named choices): " + name_str,
+ "Type : " + typename[sc.type],
+ "Selected symbol : " + sel_str,
+ "User value : " + user_value_str,
+ "Mode : " + mode_str,
+ "Visibility : " + visibility_str,
+ "Optional : " + bool_str[sc.optional],
+ "Prompts:",
+ prompts_str,
+ "Defaults:",
+ defaults_str,
+ "Choice symbols:",
+ " " + syms_string,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Locations: " + locations_str)
+
+ def _expr_depends_on(self, expr, sym):
+ """Reimplementation of expr_depends_symbol() from mconf.c. Used to
+ determine if a submenu should be implicitly created, which influences what
+ items inside choice statements are considered choice items."""
+ if expr is None:
+ return False
+
+ def rec(expr):
+ if isinstance(expr, str):
+ return False
+
+ if isinstance(expr, Symbol):
+ return expr is sym
+
+ e0 = expr[0]
+
+ if e0 == EQUAL or e0 == UNEQUAL:
+ return self._eq_to_sym(expr) is sym
+
+ if e0 == AND:
+ for and_expr in expr[1]:
+ if rec(and_expr):
+ return True
+
+ return False
+
+ return rec(expr)
+
+ def _eq_to_sym(self, eq):
+ """_expr_depends_on() helper. For (in)equalities of the form sym = y/m
+ or sym != n, returns sym. For other (in)equalities, returns None."""
+ relation, left, right = eq
+
+ left = self._transform_n_m_y(left)
+ right = self._transform_n_m_y(right)
+
+ # Make sure the symbol (if any) appears to the left
+ if not isinstance(left, Symbol):
+ left, right = right, left
+
+ if not isinstance(left, Symbol):
+ return None
+
+ if (relation == EQUAL and (right == "m" or right == "y")) or \
+ (relation == UNEQUAL and right == "n"):
+ return left
+
+ return None
+
+ def _transform_n_m_y(self, item):
+ """_eq_to_sym() helper. Translates the symbols n, m, and y to their
+ string equivalents."""
+ if item is self.n:
+ return "n"
+ if item is self.m:
+ return "m"
+ if item is self.y:
+ return "y"
+ return item
+
+ def _warn(self, msg, filename = None, linenr = None):
+ """For printing warnings to stderr."""
+ if self.print_warnings:
+ self._warn_or_undef_assign(msg, WARNING, filename, linenr)
+
+ def _undef_assign(self, msg, filename = None, linenr = None):
+ """For printing informational messages related to assignments
+ to undefined variables to stderr."""
+ if self.print_undef_assign:
+ self._warn_or_undef_assign(msg, UNDEF_ASSIGN, filename, linenr)
+
+ def _warn_or_undef_assign(self, msg, msg_type, filename, linenr):
+ if filename is not None:
+ sys.stderr.write("{0}:".format(_clean_up_path(filename)))
+ if linenr is not None:
+ sys.stderr.write("{0}:".format(linenr))
+
+ if msg_type == WARNING:
+ sys.stderr.write("warning: ")
+ elif msg_type == UNDEF_ASSIGN:
+ sys.stderr.write("info: ")
+ else:
+ _internal_error('Internal error while printing warning: unknown warning type "{0}".'
+ .format(msg_type))
+
+ sys.stderr.write(msg + "\n")
+
+def _get_expr_syms(expr):
+ """Returns the set() of symbols appearing in expr."""
+ res = set()
+ if expr is None:
+ return res
+
+ def rec(expr):
+ if isinstance(expr, Symbol):
+ res.add(expr)
+ return
+
+ if isinstance(expr, str):
+ return
+
+ e0 = expr[0]
+
+ if e0 == OR or e0 == AND:
+ for term in expr[1]:
+ rec(term)
+
+ elif e0 == NOT:
+ rec(expr[1])
+
+ elif e0 == EQUAL or e0 == UNEQUAL:
+ _, v1, v2 = expr
+
+ if isinstance(v1, Symbol):
+ res.add(v1)
+
+ if isinstance(v2, Symbol):
+ res.add(v2)
+
+ else:
+ _internal_error("Internal error while fetching symbols from an "
+ "expression with token stream {0}.".format(expr))
+
+ rec(expr)
+ return res
+
+
+#
+# Construction of expressions
+#
+
+# These functions as well as the _eval_min/max() functions above equate
+# None with "y", which is usually what we want, but needs to be kept in
+# mind.
+
+def _make_or(e1, e2):
+ # Perform trivial simplification and avoid None's (which
+ # correspond to y's)
+ if e1 is None or e2 is None or \
+ e1 == "y" or e2 == "y":
+ return "y"
+
+ if e1 == "n":
+ return e2
+
+ if e2 == "n":
+ return e1
+
+ # Prefer to merge/update argument list if possible instead of creating
+ # a new OR node
+
+ if isinstance(e1, tuple) and e1[0] == OR:
+ if isinstance(e2, tuple) and e2[0] == OR:
+ return (OR, e1[1] + e2[1])
+ return (OR, e1[1] + [e2])
+
+ if isinstance(e2, tuple) and e2[0] == OR:
+ return (OR, e2[1] + [e1])
+
+ return (OR, [e1, e2])
+
+# Note: returns None if e1 == e2 == None
+
+def _make_and(e1, e2):
+ if e1 == "n" or e2 == "n":
+ return "n"
+
+ if e1 is None or e1 == "y":
+ return e2
+
+ if e2 is None or e2 == "y":
+ return e1
+
+ # Prefer to merge/update argument list if possible instead of creating
+ # a new AND node
+
+ if isinstance(e1, tuple) and e1[0] == AND:
+ if isinstance(e2, tuple) and e2[0] == AND:
+ return (AND, e1[1] + e2[1])
+ return (AND, e1[1] + [e2])
+
+ if isinstance(e2, tuple) and e2[0] == AND:
+ return (AND, e2[1] + [e1])
+
+ return (AND, [e1, e2])
+
+#
+# Constants and functions related to types, parsing, evaluation and printing,
+# put globally to unclutter the Config class a bit.
+#
+
+# Tokens
+(T_OR, T_AND, T_NOT,
+ T_OPEN_PAREN, T_CLOSE_PAREN,
+ T_EQUAL, T_UNEQUAL,
+ T_MAINMENU, T_MENU, T_ENDMENU,
+ T_SOURCE, T_CHOICE, T_ENDCHOICE,
+ T_COMMENT, T_CONFIG, T_MENUCONFIG,
+ T_HELP, T_IF, T_ENDIF, T_DEPENDS, T_ON,
+ T_OPTIONAL, T_PROMPT, T_DEFAULT,
+ T_BOOL, T_TRISTATE, T_HEX, T_INT, T_STRING,
+ T_DEF_BOOL, T_DEF_TRISTATE,
+ T_SELECT, T_RANGE, T_OPTION, T_ENV,
+ T_DEFCONFIG_LIST, T_MODULES, T_VISIBLE) = range(0, 38)
+
+# Keyword to token map
+keywords = {
+ "mainmenu" : T_MAINMENU,
+ "menu" : T_MENU,
+ "endmenu" : T_ENDMENU,
+ "endif" : T_ENDIF,
+ "endchoice" : T_ENDCHOICE,
+ "source" : T_SOURCE,
+ "choice" : T_CHOICE,
+ "config" : T_CONFIG,
+ "comment" : T_COMMENT,
+ "menuconfig" : T_MENUCONFIG,
+ "help" : T_HELP,
+ "if" : T_IF,
+ "depends" : T_DEPENDS,
+ "on" : T_ON,
+ "optional" : T_OPTIONAL,
+ "prompt" : T_PROMPT,
+ "default" : T_DEFAULT,
+ "bool" : T_BOOL,
+ "boolean" : T_BOOL,
+ "tristate" : T_TRISTATE,
+ "int" : T_INT,
+ "hex" : T_HEX,
+ "def_bool" : T_DEF_BOOL,
+ "def_tristate" : T_DEF_TRISTATE,
+ "string" : T_STRING,
+ "select" : T_SELECT,
+ "range" : T_RANGE,
+ "option" : T_OPTION,
+ "env" : T_ENV,
+ "defconfig_list" : T_DEFCONFIG_LIST,
+ "modules" : T_MODULES,
+ "visible" : T_VISIBLE }
+
+# Strings to use for True and False
+bool_str = { False : "false", True : "true" }
+
+# Tokens after which identifier-like lexemes are treated as strings. T_CHOICE
+# is included to avoid symbols being registered for named choices.
+string_lex = frozenset((T_BOOL, T_TRISTATE, T_INT, T_HEX, T_STRING, T_CHOICE,
+ T_PROMPT, T_MENU, T_COMMENT, T_SOURCE, T_MAINMENU))
+
+# Matches the initial token on a line; see _tokenize().
+initial_token_re = re.compile(r"[^\w]*(\w+)")
+
+# Matches an identifier/keyword optionally preceded by whitespace
+id_keyword_re = re.compile(r"\s*([\w./-]+)")
+
+# Regular expressions for parsing .config files
+set_re = re.compile(r"CONFIG_(\w+)=(.*)")
+unset_re = re.compile(r"# CONFIG_(\w+) is not set")
+
+# Regular expression for finding $-references to symbols in strings
+sym_ref_re = re.compile(r"\$[A-Za-z_]+")
+
+# Integers representing symbol types
+UNKNOWN, BOOL, TRISTATE, STRING, HEX, INT = range(0, 6)
+
+# Strings to use for types
+typename = {
+ UNKNOWN : "unknown",
+ BOOL : "bool",
+ TRISTATE : "tristate",
+ STRING : "string",
+ HEX : "hex",
+ INT : "int" }
+
+# Token to type mapping
+token_to_type = { T_BOOL : BOOL,
+ T_TRISTATE : TRISTATE,
+ T_STRING : STRING,
+ T_INT : INT,
+ T_HEX : HEX }
+
+# Default values for symbols of different types (the value the symbol gets if
+# it is not assigned a user value and none of its 'default' clauses kick in)
+default_value = { BOOL : "n",
+ TRISTATE : "n",
+ STRING : "",
+ INT : "",
+ HEX : "" }
+
+# Indicates that no item is selected in a choice statement
+NO_SELECTION = 0
+
+# Integers representing expression types
+OR, AND, NOT, EQUAL, UNEQUAL = range(0, 5)
+
+# Map from tristate values to integers
+tri_to_int = { "n" : 0, "m" : 1, "y" : 2 }
+
+# Printing-related stuff
+
+op_to_str = { AND : " && ",
+ OR : " || ",
+ EQUAL : " = ",
+ UNEQUAL : " != " }
+
+precedence = { OR : 0, AND : 1, NOT : 2 }
+
+# Types of informational messages
+WARNING = 0
+UNDEF_ASSIGN = 1
+
+def _intersperse(lst, op):
+ """_expr_to_str() helper. Gets the string representation of each expression in lst
+ and produces a list where op has been inserted between the elements."""
+ if lst == []:
+ return ""
+
+ res = []
+
+ def handle_sub_expr(expr):
+ no_parens = isinstance(expr, (str, Symbol)) or \
+ expr[0] in (EQUAL, UNEQUAL) or \
+ precedence[op] <= precedence[expr[0]]
+ if not no_parens:
+ res.append("(")
+ res.extend(_expr_to_str_rec(expr))
+ if not no_parens:
+ res.append(")")
+
+ op_str = op_to_str[op]
+
+ handle_sub_expr(lst[0])
+ for expr in lst[1:]:
+ res.append(op_str)
+ handle_sub_expr(expr)
+
+ return res
+
+def _expr_to_str(expr):
+ s = "".join(_expr_to_str_rec(expr))
+ return s
+
+def _sym_str_string(sym_or_str):
+ if isinstance(sym_or_str, str):
+ return '"{0}"'.format(sym_or_str)
+ return sym_or_str.name
+
+def _expr_to_str_rec(expr):
+ if expr is None:
+ return [""]
+
+ if isinstance(expr, (Symbol, str)):
+ return [_sym_str_string(expr)]
+
+ e0 = expr[0]
+
+ if e0 == OR or e0 == AND:
+ return _intersperse(expr[1], expr[0])
+
+ if e0 == NOT:
+ need_parens = not isinstance(expr[1], (str, Symbol))
+
+ res = ["!"]
+ if need_parens:
+ res.append("(")
+ res.extend(_expr_to_str_rec(expr[1]))
+ if need_parens:
+ res.append(")")
+ return res
+
+ if e0 == EQUAL or e0 == UNEQUAL:
+ return [_sym_str_string(expr[1]),
+ op_to_str[expr[0]],
+ _sym_str_string(expr[2])]
+
+class _Block:
+
+ """Represents a list of items (symbols, menus, choice statements and
+ comments) appearing at the top-level of a file or witin a menu, choice or
+ if statement."""
+
+ def __init__(self):
+ self.items = []
+
+ def get_items(self):
+ return self.items
+
+ def add_item(self, item):
+ self.items.append(item)
+
+ def _make_conf(self):
+ # Collect the substrings in a list and later use join() instead of +=
+ # to build the final .config contents. With older Python versions, this
+ # yields linear instead of quadratic complexity.
+ strings = []
+ for item in self.items:
+ strings.extend(item._make_conf())
+
+ return strings
+
+ def add_depend_expr(self, expr):
+ for item in self.items:
+ item.add_depend_expr(expr)
+
+class Item():
+
+ """Base class for symbols and other Kconfig constructs. Subclasses are
+ Symbol, Choice, Menu, and Comment."""
+
+ def is_symbol(self):
+ """Returns True if the item is a symbol, otherwise False. Short for
+ isinstance(item, kconfiglib.Symbol)."""
+ return isinstance(self, Symbol)
+
+ def is_choice(self):
+ """Returns True if the item is a choice, otherwise False. Short for
+ isinstance(item, kconfiglib.Choice)."""
+ return isinstance(self, Choice)
+
+ def is_menu(self):
+ """Returns True if the item is a menu, otherwise False. Short for
+ isinstance(item, kconfiglib.Menu)."""
+ return isinstance(self, Menu)
+
+ def is_comment(self):
+ """Returns True if the item is a comment, otherwise False. Short for
+ isinstance(item, kconfiglib.Comment)."""
+ return isinstance(self, Comment)
+
+class _HasVisibility():
+
+ """Base class for elements that have a "visibility" that acts as an upper
+ limit on the values a user can set for them. Subclasses are Symbol and
+ Choice (which supply some of the attributes)."""
+
+ def __init__(self):
+ self.cached_visibility = None
+ self.prompts = []
+
+ def _invalidate(self):
+ self.cached_visibility = None
+
+ def _get_visibility(self):
+ if self.cached_visibility is None:
+ vis = "n"
+ for (prompt, cond_expr) in self.prompts:
+ vis = self.config._eval_max(vis, cond_expr)
+
+ if isinstance(self, Symbol) and self.is_choice_symbol_:
+ vis = self.config._eval_min(vis, self.parent._get_visibility())
+
+ # Promote "m" to "y" if we're dealing with a non-tristate
+ if vis == "m" and self.type != TRISTATE:
+ vis = "y"
+
+ self.cached_visibility = vis
+
+ return self.cached_visibility
+
+class Symbol(Item, _HasVisibility):
+
+ """Represents a configuration symbol - e.g. FOO for
+
+ config FOO
+ ..."""
+
+ #
+ # Public interface
+ #
+
+ def get_value(self):
+ """Calculate and return the value of the symbol. See also
+ Symbol.set_user_value()."""
+
+ if self.cached_value is not None:
+ return self.cached_value
+
+ self.write_to_conf = False
+
+ # As a quirk of Kconfig, undefined symbols get their name as their
+ # value. This is why things like "FOO = bar" work for seeing if FOO has
+ # the value "bar".
+ if self.type == UNKNOWN:
+ self.cached_value = self.name
+ return self.name
+
+ new_val = default_value[self.type]
+
+ vis = self._get_visibility()
+
+ if self.type == BOOL or self.type == TRISTATE:
+ # The visibility and mode (modules-only or single-selection) of
+ # choice items will be taken into account in self._get_visibility()
+
+ if self.is_choice_symbol_:
+ if vis != "n":
+ choice = self.parent
+ mode = choice.get_mode()
+
+ self.write_to_conf = (mode != "n")
+
+ if mode == "y":
+ new_val = "y" if (choice.get_selection() is self) else "n"
+ elif mode == "m":
+ if self.user_val == "m" or self.user_val == "y":
+ new_val = "m"
+
+ else:
+ use_defaults = True
+
+ if vis != "n":
+ # If the symbol is visible and has a user value, use that.
+ # Otherwise, look at defaults.
+ self.write_to_conf = True
+
+ if self.user_val is not None:
+ new_val = self.config._eval_min(self.user_val, vis)
+ use_defaults = False
+
+ if use_defaults:
+ for (val_expr, cond_expr) in self.def_exprs:
+ cond_eval = self.config._eval_expr(cond_expr)
+
+ if cond_eval != "n":
+ self.write_to_conf = True
+ new_val = self.config._eval_min(val_expr, cond_eval)
+ break
+
+ # Reverse dependencies take precedence
+ rev_dep_val = self.config._eval_expr(self.rev_dep)
+
+ if rev_dep_val != "n":
+ self.write_to_conf = True
+ new_val = self.config._eval_max(new_val, rev_dep_val)
+
+ # Promote "m" to "y" for booleans
+ if new_val == "m" and self.type == BOOL:
+ new_val = "y"
+
+ elif self.type == STRING:
+ use_defaults = True
+
+ if vis != "n":
+ self.write_to_conf = True
+ if self.user_val is not None:
+ new_val = self.user_val
+ use_defaults = False
+
+ if use_defaults:
+ for (val_expr, cond_expr) in self.def_exprs:
+ if self.config._eval_expr(cond_expr) != "n":
+ self.write_to_conf = True
+ new_val = self.config._get_str_value(val_expr)
+ break
+
+ elif self.type == HEX or self.type == INT:
+ has_active_range = False
+ low = None
+ high = None
+ use_defaults = True
+
+ base = 16 if self.type == HEX else 10
+
+ for(l, h, cond_expr) in self.ranges:
+ if self.config._eval_expr(cond_expr) != "n":
+ has_active_range = True
+
+ low_str = self.config._get_str_value(l)
+ high_str = self.config._get_str_value(h)
+
+ low = int(low_str, base) if \
+ _is_base_n(low_str, base) else 0
+ high = int(high_str, base) if \
+ _is_base_n(high_str, base) else 0
+
+ break
+
+ if vis != "n":
+ self.write_to_conf = True
+
+ if self.user_val is not None and \
+ _is_base_n(self.user_val, base) and \
+ (not has_active_range or
+ low <= int(self.user_val, base) <= high):
+
+ # If the user value is OK, it is stored in exactly the same
+ # form as specified in the assignment (with or without
+ # "0x", etc).
+
+ use_defaults = False
+ new_val = self.user_val
+
+ if use_defaults:
+ for (val_expr, cond_expr) in self.def_exprs:
+ if self.config._eval_expr(cond_expr) != "n":
+ self.write_to_conf = True
+
+ # If the default value is OK, it is stored in exactly
+ # the same form as specified. Otherwise, it is clamped
+ # to the range, and the output has "0x" as appropriate
+ # for the type.
+
+ new_val = self.config._get_str_value(val_expr)
+
+ if _is_base_n(new_val, base):
+ new_val_num = int(new_val, base)
+ if has_active_range:
+ clamped_val = None
+
+ if new_val_num < low:
+ clamped_val = low
+ elif new_val_num > high:
+ clamped_val = high
+
+ if clamped_val is not None:
+ new_val = (hex(clamped_val) if \
+ self.type == HEX else str(clamped_val))
+
+ break
+ else: # For the for loop
+ # If no user value or default kicks in but the hex/int has
+ # an active range, then the low end of the range is used,
+ # provided it's > 0, with "0x" prepended as appropriate.
+
+ if has_active_range and low > 0:
+ new_val = (hex(low) if self.type == HEX else str(low))
+
+ self.cached_value = new_val
+ return new_val
+
+ def set_user_value(self, v):
+ """Sets the user value of the symbol.
+
+ Equal in effect to assigning the value to the symbol within a .config
+ file. Use get_lower/upper_bound() or get_assignable_values() to find
+ the range of currently assignable values for bool and tristate symbols;
+ setting values outside this range will cause the user value to differ
+ from the result of Symbol.get_value() (be truncated). Values that are
+ invalid for the type (such as a_bool.set_user_value("foo")) are
+ ignored, and a warning is emitted if an attempt is made to assign such
+ a value.
+
+ For any type of symbol, is_modifiable() can be used to check if a user
+ value will currently have any effect on the symbol, as determined by
+ its visibility and range of assignable values. Any value that is valid
+ for the type (bool, tristate, etc.) will end up being reflected in
+ get_user_value() though, and might have an effect later if conditions
+ change. To get rid of the user value, use unset_user_value().
+
+ Any symbols dependent on the symbol are (recursively) invalidated, so
+ things will just work with regards to dependencies.
+
+ v -- The user value to give to the symbol."""
+ self._set_user_value_no_invalidate(v, False)
+
+ # There might be something more efficient you could do here, but play
+ # it safe.
+ if self.name == "MODULES":
+ self.config._invalidate_all()
+ return
+
+ self._invalidate()
+ self._invalidate_dependent()
+
+ def unset_user_value(self):
+ """Resets the user value of the symbol, as if the symbol had never
+ gotten a user value via Config.load_config() or
+ Symbol.set_user_value()."""
+ self._unset_user_value_no_recursive_invalidate()
+ self._invalidate_dependent()
+
+ def get_user_value(self):
+ """Returns the value assigned to the symbol in a .config or via
+ Symbol.set_user_value() (provided the value was valid for the type of the
+ symbol). Returns None in case of no user value."""
+ return self.user_val
+
+ def get_name(self):
+ """Returns the name of the symbol."""
+ return self.name
+
+ def get_prompts(self):
+ """Returns a list of prompts defined for the symbol, in the order they
+ appear in the configuration files. Returns the empty list for symbols
+ with no prompt.
+
+ This list will have a single entry for the vast majority of symbols
+ having prompts, but having multiple prompts for a single symbol is
+ possible through having multiple 'config' entries for it."""
+ return [prompt for prompt, _ in self.orig_prompts]
+
+ def get_upper_bound(self):
+ """For string/hex/int symbols and for bool and tristate symbols that
+ cannot be modified (see is_modifiable()), returns None.
+
+ Otherwise, returns the highest value the symbol can be set to with
+ Symbol.set_user_value() (that will not be truncated): one of "m" or "y",
+ arranged from lowest to highest. This corresponds to the highest value
+ the symbol could be given in e.g. the 'make menuconfig' interface.
+
+ See also the tri_less*() and tri_greater*() functions, which could come
+ in handy."""
+ if self.type != BOOL and self.type != TRISTATE:
+ return None
+ rev_dep = self.config._eval_expr(self.rev_dep)
+ # A bool selected to "m" gets promoted to "y"
+ if self.type == BOOL and rev_dep == "m":
+ rev_dep = "y"
+ vis = self._get_visibility()
+ if (tri_to_int[vis] - tri_to_int[rev_dep]) > 0:
+ return vis
+ return None
+
+ def get_lower_bound(self):
+ """For string/hex/int symbols and for bool and tristate symbols that
+ cannot be modified (see is_modifiable()), returns None.
+
+ Otherwise, returns the lowest value the symbol can be set to with
+ Symbol.set_user_value() (that will not be truncated): one of "n" or "m",
+ arranged from lowest to highest. This corresponds to the lowest value
+ the symbol could be given in e.g. the 'make menuconfig' interface.
+
+ See also the tri_less*() and tri_greater*() functions, which could come
+ in handy."""
+ if self.type != BOOL and self.type != TRISTATE:
+ return None
+ rev_dep = self.config._eval_expr(self.rev_dep)
+ # A bool selected to "m" gets promoted to "y"
+ if self.type == BOOL and rev_dep == "m":
+ rev_dep = "y"
+ if (tri_to_int[self._get_visibility()] - tri_to_int[rev_dep]) > 0:
+ return rev_dep
+ return None
+
+ def get_assignable_values(self):
+ """For string/hex/int symbols and for bool and tristate symbols that
+ cannot be modified (see is_modifiable()), returns the empty list.
+
+ Otherwise, returns a list containing the user values that can be
+ assigned to the symbol (that won't be truncated). Usage example:
+
+ if "m" in sym.get_assignable_values():
+ sym.set_user_value("m")
+
+ This is basically a more convenient interface to
+ get_lower/upper_bound() when wanting to test if a particular tristate
+ value can be assigned."""
+ if self.type != BOOL and self.type != TRISTATE:
+ return []
+ rev_dep = self.config._eval_expr(self.rev_dep)
+ # A bool selected to "m" gets promoted to "y"
+ if self.type == BOOL and rev_dep == "m":
+ rev_dep = "y"
+ res = ["n", "m", "y"][tri_to_int[rev_dep] :
+ tri_to_int[self._get_visibility()] + 1]
+ return res if len(res) > 1 else []
+
+ def get_type(self):
+ """Returns the type of the symbol: one of UNKNOWN, BOOL, TRISTATE,
+ STRING, HEX, or INT. These are defined at the top level of the module,
+ so you'd do something like
+
+ if sym.get_type() == kconfiglib.STRING:
+ ..."""
+ return self.type
+
+ def get_visibility(self):
+ """Returns the visibility of the symbol: one of "n", "m" or "y". For
+ bool and tristate symbols, this is an upper bound on the value users
+ can set for the symbol. For other types of symbols, a visibility of "n"
+ means the user value will be ignored. A visibility of "n" corresponds
+ to not being visible in the 'make *config' interfaces.
+
+ Example (assuming we're running with modules enabled -- i.e., MODULES
+ set to 'y'):
+
+ # Assume this has been assigned 'n'
+ config N_SYM
+ tristate "N_SYM"
+
+ # Assume this has been assigned 'm'
+ config M_SYM
+ tristate "M_SYM"
+
+ # Has visibility 'n'
+ config A
+ tristate "A"
+ depends on N_SYM
+
+ # Has visibility 'm'
+ config B
+ tristate "B"
+ depends on M_SYM
+
+ # Has visibility 'y'
+ config C
+ tristate "C"
+
+ # Has no prompt, and hence visibility 'n'
+ config D
+ tristate
+
+ Having visibility be tri-valued ensures that e.g. a symbol cannot be
+ set to "y" by the user if it depends on a symbol with value "m", which
+ wouldn't be safe.
+
+ You should probably look at get_lower/upper_bound(),
+ get_assignable_values() and is_modifiable() before using this."""
+ return self._get_visibility()
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the symbol, or
+ None if the symbol is at the top level. Note that if statements are
+ treated as syntactic and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """Returns the set() of all symbols referenced by this symbol. For
+ example, the symbol defined by
+
+ config FOO
+ bool
+ prompt "foo" if A && B
+ default C if D
+ depends on E
+ select F if G
+
+ references the symbols A through G.
+
+ refs_from_enclosing (default: False) -- If True, the symbols
+ referenced by enclosing menus and if's will be
+ included in the result."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_selected_symbols(self):
+ """Returns the set() of all symbols X for which this symbol has a
+ 'select X' or 'select X if Y' (regardless of whether Y is satisfied or
+ not). This is a subset of the symbols returned by
+ get_referenced_symbols()."""
+ return self.selected_syms
+
+ def get_help(self):
+ """Returns the help text of the symbol, or None if the symbol has no
+ help text."""
+ return self.help
+
+ def get_config(self):
+ """Returns the Config instance this symbol is from."""
+ return self.config
+
+ def get_def_locations(self):
+ """Returns a list of (filename, linenr) tuples, where filename (string)
+ and linenr (int) represent a location where the symbol is defined. For
+ the vast majority of symbols this list will only contain one element.
+ For the following Kconfig, FOO would get two entries: the lines marked
+ with *.
+
+ config FOO *
+ bool "foo prompt 1"
+
+ config FOO *
+ bool "foo prompt 2"
+ """
+ return self.def_locations
+
+ def get_ref_locations(self):
+ """Returns a list of (filename, linenr) tuples, where filename (string)
+ and linenr (int) represent a location where the symbol is referenced in
+ the configuration. For example, the lines marked by * would be included
+ for FOO below:
+
+ config A
+ bool
+ default BAR || FOO *
+
+ config B
+ tristate
+ depends on FOO *
+ default m if FOO *
+
+ if FOO *
+ config A
+ bool "A"
+ endif
+
+ config FOO (definition not included)
+ bool
+ """
+ return self.ref_locations
+
+ def is_modifiable(self):
+ """Returns True if the value of the symbol could be modified by calling
+ Symbol.set_user_value() and False otherwise.
+
+ For bools and tristates, this corresponds to the symbol being visible
+ in the 'make menuconfig' interface and not already being pinned to a
+ specific value (e.g. because it is selected by another symbol).
+
+ For strings and numbers, this corresponds to just being visible. (See
+ Symbol.get_visibility().)"""
+ if self.is_special_:
+ return False
+ if self.type == BOOL or self.type == TRISTATE:
+ rev_dep = self.config._eval_expr(self.rev_dep)
+ # A bool selected to "m" gets promoted to "y"
+ if self.type == BOOL and rev_dep == "m":
+ rev_dep = "y"
+ return (tri_to_int[self._get_visibility()] -
+ tri_to_int[rev_dep]) > 0
+ return self._get_visibility() != "n"
+
+ def is_defined(self):
+ """Returns False if the symbol is referred to in the Kconfig but never
+ actually defined, otherwise True."""
+ return self.is_defined_
+
+ def is_special(self):
+ """Returns True if the symbol is one of the special symbols n, m, y, or
+ UNAME_RELEASE, or gets its value from the environment. Otherwise,
+ returns False."""
+ return self.is_special_
+
+ def is_from_environment(self):
+ """Returns True if the symbol gets its value from the environment.
+ Otherwise, returns False."""
+ return self.is_from_env
+
+ def has_ranges(self):
+ """Returns True if the symbol is of type INT or HEX and has ranges that
+ limits what values it can take on, otherwise False."""
+ return self.ranges != []
+
+ def is_choice_symbol(self):
+ """Returns True if the symbol is in a choice statement and is an actual
+ choice symbol (see Choice.get_symbols()); otherwise, returns
+ False."""
+ return self.is_choice_symbol_
+
+ def is_choice_selection(self):
+ """Returns True if the symbol is contained in a choice statement and is
+ the selected item, otherwise False. Equivalent to 'sym.is_choice_symbol()
+ and sym.get_parent().get_selection() is sym'."""
+ return self.is_choice_symbol_ and self.parent.get_selection() is self
+
+ def __str__(self):
+ """Returns a string containing various information about the symbol."""
+ return self.config._get_sym_or_choice_str(self)
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Symbol constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ # Set default values
+ _HasVisibility.__init__(self)
+
+ self.config = None
+
+ self.parent = None
+ self.name = None
+ self.type = UNKNOWN
+
+ self.def_exprs = []
+ self.ranges = []
+ self.rev_dep = "n"
+
+ # The prompt, default value and select conditions without any
+ # dependencies from menus or if's propagated to them
+
+ self.orig_prompts = []
+ self.orig_def_exprs = []
+ self.orig_selects = []
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ self.help = None
+
+ # The set of symbols referenced by this symbol (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # The set of symbols selected by this symbol (see
+ # get_selected_symbols())
+ self.selected_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = set()
+
+ # This is set to True for "actual" choice symbols. See
+ # Choice._determine_actual_symbols(). The trailing underscore avoids a
+ # collision with is_choice_symbol().
+ self.is_choice_symbol_ = False
+
+ # This records only dependencies specified with 'depends on'. Needed
+ # when determining actual choice items (hrrrr...). See also
+ # Choice._determine_actual_symbols().
+ self.menu_dep = None
+
+ # See Symbol.get_ref/def_locations().
+ self.def_locations = []
+ self.ref_locations = []
+
+ self.user_val = None
+
+ # Flags
+
+ # Should the symbol get an entry in .config?
+ self.write_to_conf = False
+
+ # Caches the calculated value
+ self.cached_value = None
+
+ # Note: An instance variable 'self.dep' gets set on the Symbol in
+ # Config._build_dep(), linking the symbol to the symbols that
+ # immediately depend on it (in a caching/invalidation sense). The total
+ # set of dependent symbols for the symbol (the transitive closure) is
+ # calculated on an as-needed basis in _get_dependent().
+
+ # Caches the total list of dependent symbols. Calculated in
+ # _get_dependent().
+ self.cached_deps = None
+
+ # Does the symbol have an entry in the Kconfig file? The trailing
+ # underscore avoids a collision with is_defined().
+ self.is_defined_ = False
+
+ # Does the symbol get its value in some special way, e.g. from the
+ # environment or by being one of the special symbols n, m, and y? If
+ # so, the value is stored in self.cached_value, which is never
+ # invalidated. The trailing underscore avoids a collision with
+ # is_special().
+ self.is_special_ = False
+
+ # Does the symbol get its value from the environment?
+ self.is_from_env = False
+
+ def _invalidate(self):
+ if self.is_special_:
+ return
+
+ if self.is_choice_symbol_:
+ self.parent._invalidate()
+
+ _HasVisibility._invalidate(self)
+
+ self.write_to_conf = False
+ self.cached_value = None
+
+ def _invalidate_dependent(self):
+ for sym in self._get_dependent():
+ sym._invalidate()
+
+ def _set_user_value_no_invalidate(self, v, suppress_load_warnings):
+ """Like set_user_value(), but does not invalidate any symbols.
+
+ suppress_load_warnings --
+ some warnings are annoying when loading a .config that can be helpful
+ when manually invoking set_user_value(). This flag is set to True to
+ suppress such warnings.
+
+ Perhaps this could be made optional for load_config() instead."""
+
+ if self.is_special_:
+ if self.is_from_env:
+ self.config._warn('attempt to assign the value "{0}" to the '
+ 'symbol {1}, which gets its value from the '
+ 'environment. Assignment ignored.'
+ .format(v, self.name))
+ else:
+ self.config._warn('attempt to assign the value "{0}" to the '
+ 'special symbol {1}. Assignment ignored.'
+ .format(v, self.name))
+
+ return
+
+
+ if not self.is_defined_:
+ filename, linenr = self.ref_locations[0]
+
+ self.config._undef_assign('attempt to assign the value "{0}" to {1}, '
+ "which is referenced at {2}:{3} but never "
+ "defined. Assignment ignored."
+ .format(v, self.name, filename, linenr))
+ return
+
+ # Check if the value is valid for our type
+
+ if not (( self.type == BOOL and (v == "n" or v == "y") ) or
+ ( self.type == TRISTATE and (v == "n" or v == "m" or
+ v == "y") ) or
+ ( self.type == STRING ) or
+ ( self.type == INT and _is_base_n(v, 10) ) or
+ ( self.type == HEX and _is_base_n(v, 16) )):
+
+ self.config._warn('the value "{0}" is invalid for {1}, which has type {2}. '
+ "Assignment ignored."
+ .format(v, self.name, typename[self.type]))
+ return
+
+ if self.prompts == [] and not suppress_load_warnings:
+ self.config._warn('assigning "{0}" to the symbol {1} which '
+ 'lacks prompts and thus has visibility "n". '
+ 'The assignment will have no effect.'
+ .format(v, self.name))
+
+ self.user_val = v
+
+ if self.is_choice_symbol_ and (self.type == BOOL or
+ self.type == TRISTATE):
+ choice = self.parent
+ if v == "y":
+ choice.user_val = self
+ choice.user_mode = "y"
+ elif v == "m":
+ choice.user_val = None
+ choice.user_mode = "m"
+
+ def _unset_user_value_no_recursive_invalidate(self):
+ self._invalidate()
+ self.user_val = None
+
+ if self.is_choice_symbol_:
+ self.parent._unset_user_value()
+
+ def _make_conf(self):
+ if self.already_written:
+ return []
+
+ self.already_written = True
+
+ # Note: write_to_conf is determined in get_value()
+ val = self.get_value()
+ if not self.write_to_conf:
+ return []
+
+ if self.type == BOOL or self.type == TRISTATE:
+ if val == "m" or val == "y":
+ return ["CONFIG_{0}={1}".format(self.name, val)]
+ return ["# CONFIG_{0} is not set".format(self.name)]
+
+ elif self.type == STRING:
+ # Escape \ and "
+ return ['CONFIG_{0}="{1}"'
+ .format(self.name,
+ val.replace("\\", "\\\\").replace('"', '\\"'))]
+
+ elif self.type == INT or self.type == HEX:
+ return ["CONFIG_{0}={1}".format(self.name, val)]
+
+ else:
+ _internal_error('Internal error while creating .config: unknown type "{0}".'
+ .format(self.type))
+
+ def _get_dependent(self):
+ """Returns the set of symbols that should be invalidated if the value
+ of the symbol changes, because they might be affected by the change.
+ Note that this is an internal API -- it's probably of limited
+ usefulness to clients."""
+ if self.cached_deps is not None:
+ return self.cached_deps
+
+ res = set()
+
+ self._add_dependent_ignore_siblings(res)
+ if self.is_choice_symbol_:
+ for s in self.parent.get_symbols():
+ if s is not self:
+ res.add(s)
+ s._add_dependent_ignore_siblings(res)
+
+ self.cached_deps = res
+ return res
+
+ def _add_dependent_ignore_siblings(self, to):
+ """Calculating dependencies gets a bit tricky for choice items as they
+ all depend on each other, potentially leading to infinite recursion.
+ This helper function calculates dependencies ignoring the other symbols
+ in the choice. It also works fine for symbols that are not choice
+ items."""
+ for s in self.dep:
+ to.add(s)
+ to |= s._get_dependent()
+
+ def _has_auto_menu_dep_on(self, on):
+ """See Choice._determine_actual_symbols()."""
+ if not isinstance(self.parent, Choice):
+ _internal_error("Attempt to determine auto menu dependency for symbol ouside of choice.")
+
+ if self.prompts == []:
+ # If we have no prompt, use the menu dependencies instead (what was
+ # specified with 'depends on')
+ return self.menu_dep is not None and \
+ self.config._expr_depends_on(self.menu_dep, on)
+
+ for (_, cond_expr) in self.prompts:
+ if self.config._expr_depends_on(cond_expr, on):
+ return True
+
+ return False
+
+class Menu(Item):
+
+ """Represents a menu statement."""
+
+ #
+ # Public interface
+ #
+
+ def get_config(self):
+ """Return the Config instance this menu is from."""
+ return self.config
+
+ def get_visibility(self):
+ """Returns the visibility of the menu. This also affects the visibility
+ of subitems. See also Symbol.get_visibility()."""
+ return self.config._eval_expr(self.dep_expr)
+
+ def get_visible_if_visibility(self):
+ """Returns the visibility the menu gets from its 'visible if'
+ condition. "y" if the menu has no 'visible if' condition."""
+ return self.config._eval_expr(self.visible_if_expr)
+
+ def get_items(self, recursive = False):
+ """Returns a list containing the items (symbols, menus, choice
+ statements and comments) in in the menu, in the same order that the
+ items appear within the menu.
+
+ recursive (default: False) -- True if items contained in items within
+ the menu should be included
+ recursively (preorder)."""
+
+ if not recursive:
+ return self.block.get_items()
+
+ res = []
+ for item in self.block.get_items():
+ res.append(item)
+ if isinstance(item, Menu):
+ res.extend(item.get_items(True))
+ elif isinstance(item, Choice):
+ res.extend(item.get_items())
+ return res
+
+ def get_symbols(self, recursive = False):
+ """Returns a list containing the symbols in the menu, in the same order
+ that they appear within the menu.
+
+ recursive (default: False) -- True if symbols contained in items within
+ the menu should be included
+ recursively."""
+
+ return [item for item in self.get_items(recursive) if isinstance(item, Symbol)]
+
+ def get_title(self):
+ """Returns the title text of the menu."""
+ return self.title
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the menu, or
+ None if the menu is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """See Symbol.get_referenced_symbols()."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_location(self):
+ """Returns the location of the menu as a (filename, linenr) tuple,
+ where filename is a string and linenr an int."""
+ return (self.filename, self.linenr)
+
+ def __str__(self):
+ """Returns a string containing various information about the menu."""
+ depends_on_str = self.config._expr_val_str(self.orig_deps,
+ "(no dependencies)")
+ visible_if_str = self.config._expr_val_str(self.visible_if_expr,
+ "(no dependencies)")
+
+ additional_deps_str = " " + self.config._expr_val_str(self.deps_from_containing,
+ "(no additional dependencies)")
+
+ return _sep_lines("Menu",
+ "Title : " + self.title,
+ "'depends on' dependencies : " + depends_on_str,
+ "'visible if' dependencies : " + visible_if_str,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Location: {0}:{1}".format(self.filename, self.linenr))
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Menu constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ self.config = None
+
+ self.parent = None
+ self.title = None
+ self.block = None
+ self.dep_expr = None
+
+ # Dependency expression without dependencies from enclosing menus and
+ # if's propagated
+ self.orig_deps = None
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ # The 'visible if' expression
+ self.visible_if_expr = None
+
+ # The set of symbols referenced by this menu (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = None
+
+ self.filename = None
+ self.linenr = None
+
+ def _make_conf(self):
+ item_conf = self.block._make_conf()
+
+ if self.config._eval_expr(self.dep_expr) != "n" and \
+ self.config._eval_expr(self.visible_if_expr) != "n":
+ return ["\n#\n# {0}\n#".format(self.title)] + item_conf
+ return item_conf
+
+class Choice(Item, _HasVisibility):
+
+ """Represents a choice statement. A choice can be in one of three modes:
+
+ "n" - The choice is not visible and no symbols can be selected.
+
+ "m" - Any number of symbols can be set to "m". The rest will be "n". This
+ is safe since potentially conflicting options don't actually get
+ compiled into the kernel simultaneously with "m".
+
+ "y" - One symbol will be "y" while the rest are "n".
+
+ Only tristate choices can be in "m" mode, and the visibility of the choice
+ is an upper bound on the mode, so that e.g. a choice that depends on a
+ symbol with value "m" will be in "m" mode.
+
+ The mode changes automatically when a value is assigned to a symbol within
+ the choice.
+
+ See Symbol.get_visibility() too."""
+
+ #
+ # Public interface
+ #
+
+ def get_selection(self):
+ """Returns the symbol selected (either by the user or through
+ defaults), or None if either no symbol is selected or the mode is not
+ "y"."""
+ if self.cached_selection is not None:
+ if self.cached_selection == NO_SELECTION:
+ return None
+ return self.cached_selection
+
+ if self.get_mode() != "y":
+ return self._cache_ret(None)
+
+ # User choice available?
+ if self.user_val is not None and \
+ self.user_val._get_visibility() == "y":
+ return self._cache_ret(self.user_val)
+
+ if self.optional:
+ return self._cache_ret(None)
+
+ return self._cache_ret(self.get_selection_from_defaults())
+
+ def get_selection_from_defaults(self):
+ """Like Choice.get_selection(), but acts as if no symbol has been
+ selected by the user and no 'optional' flag is in effect."""
+
+ if self.actual_symbols == []:
+ return None
+
+ for (symbol, cond_expr) in self.def_exprs:
+ if self.config._eval_expr(cond_expr) != "n":
+ chosen_symbol = symbol
+ break
+ else:
+ chosen_symbol = self.actual_symbols[0]
+
+ # Is the chosen symbol visible?
+ if chosen_symbol._get_visibility() != "n":
+ return chosen_symbol
+ # Otherwise, pick the first visible symbol
+ for sym in self.actual_symbols:
+ if sym._get_visibility() != "n":
+ return sym
+ return None
+
+ def get_user_selection(self):
+ """If the choice is in "y" mode and has a user-selected symbol, returns
+ that symbol. Otherwise, returns None."""
+ return self.user_val
+
+ def get_config(self):
+ """Returns the Config instance this choice is from."""
+ return self.config
+
+ def get_name(self):
+ """For named choices, returns the name. Returns None for unnamed
+ choices. No named choices appear anywhere in the kernel Kconfig files
+ as of Linux 3.7.0-rc8."""
+ return self.name
+
+ def get_prompts(self):
+ """Returns a list of prompts defined for the choice, in the order they
+ appear in the configuration files. Returns the empty list for choices
+ with no prompt.
+
+ This list will have a single entry for the vast majority of choices
+ having prompts, but having multiple prompts for a single choice is
+ possible through having multiple 'choice' entries for it (though I'm
+ not sure if that ever happens in practice)."""
+ return [prompt for prompt, _ in self.orig_prompts]
+
+ def get_help(self):
+ """Returns the help text of the choice, or None if the choice has no
+ help text."""
+ return self.help
+
+ def get_type(self):
+ """Returns the type of the choice. See Symbol.get_type()."""
+ return self.type
+
+ def get_items(self):
+ """Gets all items contained in the choice in the same order as within
+ the configuration ("items" instead of "symbols" since choices and
+ comments might appear within choices. This only happens in one place as
+ of Linux 3.7.0-rc8, in drivers/usb/gadget/Kconfig)."""
+ return self.block.get_items()
+
+ def get_symbols(self):
+ """Returns a list containing the choice's symbols.
+
+ A quirk (perhaps a bug) of Kconfig is that you can put items within a
+ choice that will not be considered members of the choice insofar as
+ selection is concerned. This happens for example if one symbol within a
+ choice 'depends on' the symbol preceding it, or if you put non-symbol
+ items within choices.
+
+ As of Linux 3.7.0-rc8, this seems to be used intentionally in one
+ place: drivers/usb/gadget/Kconfig.
+
+ This function returns the "proper" symbols of the choice in the order
+ they appear in the choice, excluding such items. If you want all items
+ in the choice, use get_items()."""
+ return self.actual_symbols
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the choice, or
+ None if the choice is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """See Symbol.get_referenced_symbols()."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_def_locations(self):
+ """Returns a list of (filename, linenr) tuples, where filename (string)
+ and linenr (int) represent a location where the choice is defined. For
+ the vast majority of choices (all of them as of Linux 3.7.0-rc8) this
+ list will only contain one element, but its possible for named choices
+ to be defined in multiple locations."""
+ return self.def_locations
+
+ def get_visibility(self):
+ """Returns the visibility of the choice statement: one of "n", "m" or
+ "y". This acts as an upper limit on the mode of the choice (though bool
+ choices can only have the mode "y"). See the class documentation for an
+ explanation of modes."""
+ return self._get_visibility()
+
+ def get_mode(self):
+ """Returns the mode of the choice. See the class documentation for
+ an explanation of modes."""
+ minimum_mode = "n" if self.optional else "m"
+ mode = self.user_mode if self.user_mode is not None else minimum_mode
+ mode = self.config._eval_min(mode, self._get_visibility())
+
+ # Promote "m" to "y" for boolean choices
+ if mode == "m" and self.type == BOOL:
+ return "y"
+
+ return mode
+
+ def is_optional(self):
+ """Returns True if the symbol has the optional flag set (and so will default
+ to "n" mode). Otherwise, returns False."""
+ return self.optional
+
+ def __str__(self):
+ """Returns a string containing various information about the choice
+ statement."""
+ return self.config._get_sym_or_choice_str(self)
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Choice constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ _HasVisibility.__init__(self)
+
+ self.config = None
+
+ self.parent = None
+ self.name = None # Yes, choices can be named
+ self.type = UNKNOWN
+ self.def_exprs = []
+ self.help = None
+ self.optional = False
+ self.block = None
+
+ # The prompts and default values without any dependencies from
+ # enclosing menus or if's propagated
+
+ self.orig_prompts = []
+ self.orig_def_exprs = []
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ # We need to filter out symbols that appear within the choice block but
+ # are not considered choice items (see
+ # Choice._determine_actual_symbols()) This list holds the "actual" choice
+ # items.
+ self.actual_symbols = []
+
+ # The set of symbols referenced by this choice (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = set()
+
+ # See Choice.get_def_locations()
+ self.def_locations = []
+
+ self.user_val = None
+ self.user_mode = None
+
+ self.cached_selection = None
+
+ def _determine_actual_symbols(self):
+ """If a symbol's visibility depends on the preceding symbol within a
+ choice, it is no longer viewed as a choice item (quite possibly a bug,
+ but some things consciously use it.. ugh. It stems from automatic
+ submenu creation). In addition, it's possible to have choices and
+ comments within choices, and those shouldn't be considered as choice
+ items either. Only drivers/usb/gadget/Kconfig seems to depend on any of
+ this. This method computes the "actual" items in the choice and sets
+ the is_choice_symbol_ flag on them (retrieved via is_choice_symbol()).
+
+ Don't let this scare you: an earlier version simply checked for a
+ sequence of symbols where all symbols after the first appeared in the
+ 'depends on' expression of the first, and that worked fine. The added
+ complexity is to be future-proof in the event that
+ drivers/usb/gadget/Kconfig turns even more sinister. It might very well
+ be overkilling things (especially if that file is refactored ;)."""
+
+ items = self.block.get_items()
+
+ # Items might depend on each other in a tree structure, so we need a
+ # stack to keep track of the current tentative parent
+ stack = []
+
+ for item in items:
+ if not isinstance(item, Symbol):
+ stack = []
+ continue
+
+ while stack != []:
+ if item._has_auto_menu_dep_on(stack[-1]):
+ # The item should not be viewed as a choice item, so don't
+ # set item.is_choice_symbol_.
+ stack.append(item)
+ break
+ else:
+ stack.pop()
+ else:
+ item.is_choice_symbol_ = True
+ self.actual_symbols.append(item)
+ stack.append(item)
+
+ def _cache_ret(self, selection):
+ # As None is used to indicate the lack of a cached value we can't use
+ # that to cache the fact that the choice has no selection. Instead, we
+ # use the symbolic constant NO_SELECTION.
+ if selection is None:
+ self.cached_selection = NO_SELECTION
+ else:
+ self.cached_selection = selection
+
+ return selection
+
+ def _invalidate(self):
+ _HasVisibility._invalidate(self)
+ self.cached_selection = None
+
+ def _unset_user_value(self):
+ self._invalidate()
+ self.user_val = None
+ self.user_mode = None
+
+ def _make_conf(self):
+ return self.block._make_conf()
+
+class Comment(Item):
+
+ """Represents a comment statement."""
+
+ #
+ # Public interface
+ #
+
+ def get_config(self):
+ """Returns the Config instance this comment is from."""
+ return self.config
+
+ def get_visibility(self):
+ """Returns the visibility of the comment. See also
+ Symbol.get_visibility()."""
+ return self.config._eval_expr(self.dep_expr)
+
+ def get_text(self):
+ """Returns the text of the comment."""
+ return self.text
+
+ def get_parent(self):
+ """Returns the menu or choice statement that contains the comment, or
+ None if the comment is at the top level. Note that if statements are
+ treated as syntactic sugar and do not have an explicit class
+ representation."""
+ return self.parent
+
+ def get_referenced_symbols(self, refs_from_enclosing = False):
+ """See Symbol.get_referenced_symbols()."""
+ return self.all_referenced_syms if refs_from_enclosing else self.referenced_syms
+
+ def get_location(self):
+ """Returns the location of the comment as a (filename, linenr) tuple,
+ where filename is a string and linenr an int."""
+ return (self.filename, self.linenr)
+
+ def __str__(self):
+ """Returns a string containing various information about the comment."""
+ dep_str = self.config._expr_val_str(self.orig_deps, "(no dependencies)")
+
+ additional_deps_str = " " + self.config._expr_val_str(self.deps_from_containing,
+ "(no additional dependencies)")
+
+ return _sep_lines("Comment",
+ "Text: " + str(self.text),
+ "Dependencies: " + dep_str,
+ "Additional dependencies from enclosing menus and if's:",
+ additional_deps_str,
+ "Location: {0}:{1}".format(self.filename, self.linenr))
+
+ #
+ # Private methods
+ #
+
+ def __init__(self):
+ """Comment constructor -- not intended to be called directly by
+ kconfiglib clients."""
+
+ self.config = None
+
+ self.parent = None
+ self.text = None
+ self.dep_expr = None
+
+ # Dependency expression without dependencies from enclosing menus and
+ # if's propagated
+ self.orig_deps = None
+
+ # Dependencies inherited from containing menus and if's
+ self.deps_from_containing = None
+
+ # The set of symbols referenced by this comment (see
+ # get_referenced_symbols())
+ self.referenced_syms = set()
+
+ # Like 'referenced_syms', but includes symbols from
+ # dependencies inherited from enclosing menus and if's
+ self.all_referenced_syms = None
+
+ self.filename = None
+ self.linenr = None
+
+ def _make_conf(self):
+ if self.config._eval_expr(self.dep_expr) != "n":
+ return ["\n#\n# {0}\n#".format(self.text)]
+ return []
+
+class _Feed:
+
+ """Class for working with sequences in a stream-like fashion; handy for tokens."""
+
+ def __init__(self, items):
+ self.items = items
+ self.length = len(self.items)
+ self.i = 0
+
+ def get_next(self):
+ if self.i >= self.length:
+ return None
+
+ item = self.items[self.i]
+ self.i += 1
+ return item
+
+ def peek_next(self):
+ return None if self.i >= self.length else self.items[self.i]
+
+ def go_to_start(self):
+ self.i = 0
+
+ def __getitem__(self, index):
+ return self.items[index]
+
+ def __len__(self):
+ return len(self.items)
+
+ def is_empty(self):
+ return self.items == []
+
+ def check(self, token):
+ """Check if the next token is 'token'. If so, remove it from the token
+ feed and return True. Otherwise, leave it in and return False."""
+ if self.i >= self.length:
+ return None
+
+ if self.items[self.i] == token:
+ self.i += 1
+ return True
+
+ return False
+
+ def remove_while(self, pred):
+ while self.i < self.length and pred(self.items[self.i]):
+ self.i += 1
+
+ def go_back(self):
+ if self.i <= 0:
+ _internal_error("Attempt to move back in Feed while already at the beginning.")
+ self.i -= 1
+
+class _FileFeed(_Feed):
+
+ """Feed subclass that keeps track of the current filename and line
+ number."""
+
+ def __init__(self, lines, filename):
+ self.filename = _clean_up_path(filename)
+ _Feed.__init__(self, lines)
+
+ def get_filename(self):
+ return self.filename
+
+ def get_linenr(self):
+ return self.i
+
+#
+# Misc. public global utility functions
+#
+
+def tri_less(v1, v2):
+ """Returns True if the tristate v1 is less than the tristate v2, where "n",
+ "m" and "y" are ordered from lowest to highest. Otherwise, returns
+ False."""
+ return tri_to_int[v1] < tri_to_int[v2]
+
+def tri_less_eq(v1, v2):
+ """Returns True if the tristate v1 is less than or equal to the tristate
+ v2, where "n", "m" and "y" are ordered from lowest to highest. Otherwise,
+ returns False."""
+ return tri_to_int[v1] <= tri_to_int[v2]
+
+def tri_greater(v1, v2):
+ """Returns True if the tristate v1 is greater than the tristate v2, where
+ "n", "m" and "y" are ordered from lowest to highest. Otherwise, returns
+ False."""
+ return tri_to_int[v1] > tri_to_int[v2]
+
+def tri_greater_eq(v1, v2):
+ """Returns True if the tristate v1 is greater than or equal to the tristate
+ v2, where "n", "m" and "y" are ordered from lowest to highest. Otherwise,
+ returns False."""
+ return tri_to_int[v1] >= tri_to_int[v2]
+
+#
+# Helper functions, mostly related to text processing
+#
+
+def _strip_quotes(s, line, filename, linenr):
+ """Removes any quotes surrounding 's' if it has them; otherwise returns 's'
+ unmodified."""
+ s = s.strip()
+ if not s:
+ return ""
+ if s[0] == '"' or s[0] == "'":
+ if len(s) < 2 or s[-1] != s[0]:
+ _parse_error(line,
+ "malformed string literal",
+ filename,
+ linenr)
+ return s[1:-1]
+ return s
+
+def _indentation(line):
+ """Returns the indentation of the line, treating tab stops as being spaced
+ 8 characters apart."""
+ if line.isspace():
+ _internal_error("Attempt to take indentation of blank line.")
+ indent = 0
+ for c in line:
+ if c == " ":
+ indent += 1
+ elif c == "\t":
+ # Go to the next tab stop
+ indent = (indent + 8) & ~7
+ else:
+ return indent
+
+def _deindent(line, indent):
+ """Deindent 'line' by 'indent' spaces."""
+ line = line.expandtabs()
+ if len(line) <= indent:
+ return line
+ return line[indent:]
+
+def _is_base_n(s, n):
+ try:
+ int(s, n)
+ return True
+ except ValueError:
+ return False
+
+def _sep_lines(*args):
+ """Returns a string comprised of all arguments, with newlines inserted
+ between them."""
+ return "\n".join(args)
+
+def _comment(s):
+ """Returns a new string with "#" inserted before each line in 's'."""
+ if not s:
+ return "#"
+ res = "".join(["#" + line for line in s.splitlines(True)])
+ if s.endswith("\n"):
+ return res + "#"
+ return res
+
+def _get_lines(filename):
+ """Returns a list of lines from 'filename', joining any line ending in \\
+ with the following line."""
+ with open(filename, "r") as f:
+ lines = []
+ accum = ""
+ while 1:
+ line = f.readline()
+
+ if line == "":
+ return lines
+
+ if line.endswith("\\\n"):
+ accum += line[:-2]
+ else:
+ accum += line
+ lines.append(accum)
+ accum = ""
+
+def _strip_trailing_slash(path):
+ """Removes any trailing slash from 'path'."""
+ return path[:-1] if path.endswith("/") else path
+
+def _clean_up_path(path):
+ """Strips any initial "./" and trailing slash from 'path'."""
+ if path.startswith("./"):
+ path = path[2:]
+ return _strip_trailing_slash(path)
+
+#
+# Error handling
+#
+
+class Kconfig_Syntax_Error(Exception):
+ """Exception raised for syntax errors."""
+ pass
+
+class Internal_Error(Exception):
+ """Exception raised for internal errors."""
+ pass
+
+def _tokenization_error(s, index, filename, linenr):
+ if filename is not None:
+ assert linenr is not None
+ sys.stderr.write("{0}:{1}:\n".format(filename, linenr))
+
+ if s.endswith("\n"):
+ s = s[:-1]
+
+ # Calculate the visual offset corresponding to index 'index' in 's'
+ # assuming tabstops are spaced 8 characters apart
+ vis_index = 0
+ for c in s[:index]:
+ if c == "\t":
+ vis_index = (vis_index + 8) & ~7
+ else:
+ vis_index += 1
+
+ # Don't output actual tabs to be independent of how the terminal renders
+ # them
+ s = s.expandtabs()
+
+ raise Kconfig_Syntax_Error, (
+ _sep_lines("Error during tokenization at location indicated by caret.\n",
+ s,
+ " " * vis_index + "^\n"))
+
+def _parse_error(s, msg, filename, linenr):
+ error_str = ""
+
+ if filename is not None:
+ assert linenr is not None
+ error_str += "{0}:{1}: ".format(filename, linenr)
+
+ if s.endswith("\n"):
+ s = s[:-1]
+
+ error_str += 'Error while parsing "{0}"'.format(s) + \
+ ("." if msg is None else ": " + msg)
+
+ raise Kconfig_Syntax_Error, error_str
+
+def _internal_error(msg):
+ msg += "\nSorry! You may want to send an email to kconfiglib@gmail.com " \
+ "to tell me about this. Include the message above and the stack " \
+ "trace and describe what you were doing."
+
+ raise Internal_Error, msg
+
+if use_psyco:
+ import psyco
+
+ Config._tokenize = psyco.proxy(Config._tokenize)
+ Config._eval_expr = psyco.proxy(Config._eval_expr)
+
+ _indentation = psyco.proxy(_indentation)
+ _get_lines = psyco.proxy(_get_lines)
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