+def find_kconfig_rules(kconf, config, imply_config):
+ """Check whether a config has a 'select' or 'imply' keyword
+
+ Args:
+ kconf: Kconfig.Config object
+ config: Name of config to check (without CONFIG_ prefix)
+ imply_config: Implying config (without CONFIG_ prefix) which may or
+ may not have an 'imply' for 'config')
+
+ Returns:
+ Symbol object for 'config' if found, else None
+ """
+ sym = kconf.get_symbol(imply_config)
+ if sym:
+ for sel in sym.get_selected_symbols() | sym.get_implied_symbols():
+ if sel.get_name() == config:
+ return sym
+ return None
+
+def check_imply_rule(kconf, config, imply_config):
+ """Check if we can add an 'imply' option
+
+ This finds imply_config in the Kconfig and looks to see if it is possible
+ to add an 'imply' for 'config' to that part of the Kconfig.
+
+ Args:
+ kconf: Kconfig.Config object
+ config: Name of config to check (without CONFIG_ prefix)
+ imply_config: Implying config (without CONFIG_ prefix) which may or
+ may not have an 'imply' for 'config')
+
+ Returns:
+ tuple:
+ filename of Kconfig file containing imply_config, or None if none
+ line number within the Kconfig file, or 0 if none
+ message indicating the result
+ """
+ sym = kconf.get_symbol(imply_config)
+ if not sym:
+ return 'cannot find sym'
+ locs = sym.get_def_locations()
+ if len(locs) != 1:
+ return '%d locations' % len(locs)
+ fname, linenum = locs[0]
+ cwd = os.getcwd()
+ if cwd and fname.startswith(cwd):
+ fname = fname[len(cwd) + 1:]
+ file_line = ' at %s:%d' % (fname, linenum)
+ with open(fname) as fd:
+ data = fd.read().splitlines()
+ if data[linenum - 1] != 'config %s' % imply_config:
+ return None, 0, 'bad sym format %s%s' % (data[linenum], file_line)
+ return fname, linenum, 'adding%s' % file_line
+
+def add_imply_rule(config, fname, linenum):
+ """Add a new 'imply' option to a Kconfig
+
+ Args:
+ config: config option to add an imply for (without CONFIG_ prefix)
+ fname: Kconfig filename to update
+ linenum: Line number to place the 'imply' before
+
+ Returns:
+ Message indicating the result
+ """
+ file_line = ' at %s:%d' % (fname, linenum)
+ data = open(fname).read().splitlines()
+ linenum -= 1
+
+ for offset, line in enumerate(data[linenum:]):
+ if line.strip().startswith('help') or not line:
+ data.insert(linenum + offset, '\timply %s' % config)
+ with open(fname, 'w') as fd:
+ fd.write('\n'.join(data) + '\n')
+ return 'added%s' % file_line
+
+ return 'could not insert%s'
+
+(IMPLY_MIN_2, IMPLY_TARGET, IMPLY_CMD, IMPLY_NON_ARCH_BOARD) = (
+ 1, 2, 4, 8)
+
+IMPLY_FLAGS = {
+ 'min2': [IMPLY_MIN_2, 'Show options which imply >2 boards (normally >5)'],
+ 'target': [IMPLY_TARGET, 'Allow CONFIG_TARGET_... options to imply'],
+ 'cmd': [IMPLY_CMD, 'Allow CONFIG_CMD_... to imply'],
+ 'non-arch-board': [
+ IMPLY_NON_ARCH_BOARD,
+ 'Allow Kconfig options outside arch/ and /board/ to imply'],
+};
+
+def do_imply_config(config_list, add_imply, imply_flags, skip_added,
+ check_kconfig=True, find_superset=False):
+ """Find CONFIG options which imply those in the list
+
+ Some CONFIG options can be implied by others and this can help to reduce
+ the size of the defconfig files. For example, CONFIG_X86 implies
+ CONFIG_CMD_IRQ, so we can put 'imply CMD_IRQ' under 'config X86' and
+ all x86 boards will have that option, avoiding adding CONFIG_CMD_IRQ to
+ each of the x86 defconfig files.
+
+ This function uses the moveconfig database to find such options. It
+ displays a list of things that could possibly imply those in the list.
+ The algorithm ignores any that start with CONFIG_TARGET since these
+ typically refer to only a few defconfigs (often one). It also does not
+ display a config with less than 5 defconfigs.
+
+ The algorithm works using sets. For each target config in config_list:
+ - Get the set 'defconfigs' which use that target config
+ - For each config (from a list of all configs):
+ - Get the set 'imply_defconfig' of defconfigs which use that config
+ -
+ - If imply_defconfigs contains anything not in defconfigs then
+ this config does not imply the target config
+
+ Params:
+ config_list: List of CONFIG options to check (each a string)
+ add_imply: Automatically add an 'imply' for each config.
+ imply_flags: Flags which control which implying configs are allowed
+ (IMPLY_...)
+ skip_added: Don't show options which already have an imply added.
+ check_kconfig: Check if implied symbols already have an 'imply' or
+ 'select' for the target config, and show this information if so.
+ find_superset: True to look for configs which are a superset of those
+ already found. So for example if CONFIG_EXYNOS5 implies an option,
+ but CONFIG_EXYNOS covers a larger set of defconfigs and also
+ implies that option, this will drop the former in favour of the
+ latter. In practice this option has not proved very used.
+
+ Note the terminoloy:
+ config - a CONFIG_XXX options (a string, e.g. 'CONFIG_CMD_EEPROM')
+ defconfig - a defconfig file (a string, e.g. 'configs/snow_defconfig')
+ """
+ kconf = KconfigScanner().conf if check_kconfig else None
+ if add_imply and add_imply != 'all':
+ add_imply = add_imply.split()
+
+ # key is defconfig name, value is dict of (CONFIG_xxx, value)
+ config_db = {}
+
+ # Holds a dict containing the set of defconfigs that contain each config
+ # key is config, value is set of defconfigs using that config
+ defconfig_db = collections.defaultdict(set)
+
+ # Set of all config options we have seen
+ all_configs = set()
+
+ # Set of all defconfigs we have seen
+ all_defconfigs = set()
+
+ # Read in the database
+ configs = {}
+ with open(CONFIG_DATABASE) as fd:
+ for line in fd.readlines():
+ line = line.rstrip()
+ if not line: # Separator between defconfigs
+ config_db[defconfig] = configs
+ all_defconfigs.add(defconfig)
+ configs = {}
+ elif line[0] == ' ': # CONFIG line
+ config, value = line.strip().split('=', 1)
+ configs[config] = value
+ defconfig_db[config].add(defconfig)
+ all_configs.add(config)
+ else: # New defconfig
+ defconfig = line
+
+ # Work through each target config option in tern, independently
+ for config in config_list:
+ defconfigs = defconfig_db.get(config)
+ if not defconfigs:
+ print '%s not found in any defconfig' % config
+ continue
+
+ # Get the set of defconfigs without this one (since a config cannot
+ # imply itself)
+ non_defconfigs = all_defconfigs - defconfigs
+ num_defconfigs = len(defconfigs)
+ print '%s found in %d/%d defconfigs' % (config, num_defconfigs,
+ len(all_configs))
+
+ # This will hold the results: key=config, value=defconfigs containing it
+ imply_configs = {}
+ rest_configs = all_configs - set([config])
+
+ # Look at every possible config, except the target one
+ for imply_config in rest_configs:
+ if 'ERRATUM' in imply_config:
+ continue
+ if not (imply_flags & IMPLY_CMD):
+ if 'CONFIG_CMD' in imply_config:
+ continue
+ if not (imply_flags & IMPLY_TARGET):
+ if 'CONFIG_TARGET' in imply_config:
+ continue
+
+ # Find set of defconfigs that have this config
+ imply_defconfig = defconfig_db[imply_config]
+
+ # Get the intersection of this with defconfigs containing the
+ # target config
+ common_defconfigs = imply_defconfig & defconfigs
+
+ # Get the set of defconfigs containing this config which DO NOT
+ # also contain the taret config. If this set is non-empty it means
+ # that this config affects other defconfigs as well as (possibly)
+ # the ones affected by the target config. This means it implies
+ # things we don't want to imply.
+ not_common_defconfigs = imply_defconfig & non_defconfigs
+ if not_common_defconfigs:
+ continue
+
+ # If there are common defconfigs, imply_config may be useful
+ if common_defconfigs:
+ skip = False
+ if find_superset:
+ for prev in imply_configs.keys():
+ prev_count = len(imply_configs[prev])
+ count = len(common_defconfigs)
+ if (prev_count > count and
+ (imply_configs[prev] & common_defconfigs ==
+ common_defconfigs)):
+ # skip imply_config because prev is a superset
+ skip = True
+ break
+ elif count > prev_count:
+ # delete prev because imply_config is a superset
+ del imply_configs[prev]
+ if not skip:
+ imply_configs[imply_config] = common_defconfigs
+
+ # Now we have a dict imply_configs of configs which imply each config
+ # The value of each dict item is the set of defconfigs containing that
+ # config. Rank them so that we print the configs that imply the largest
+ # number of defconfigs first.
+ ranked_iconfigs = sorted(imply_configs,
+ key=lambda k: len(imply_configs[k]), reverse=True)
+ kconfig_info = ''
+ cwd = os.getcwd()
+ add_list = collections.defaultdict(list)
+ for iconfig in ranked_iconfigs:
+ num_common = len(imply_configs[iconfig])
+
+ # Don't bother if there are less than 5 defconfigs affected.
+ if num_common < (2 if imply_flags & IMPLY_MIN_2 else 5):
+ continue
+ missing = defconfigs - imply_configs[iconfig]
+ missing_str = ', '.join(missing) if missing else 'all'
+ missing_str = ''
+ show = True
+ if kconf:
+ sym = find_kconfig_rules(kconf, config[CONFIG_LEN:],
+ iconfig[CONFIG_LEN:])
+ kconfig_info = ''
+ if sym:
+ locs = sym.get_def_locations()
+ if len(locs) == 1:
+ fname, linenum = locs[0]
+ if cwd and fname.startswith(cwd):
+ fname = fname[len(cwd) + 1:]
+ kconfig_info = '%s:%d' % (fname, linenum)
+ if skip_added:
+ show = False
+ else:
+ sym = kconf.get_symbol(iconfig[CONFIG_LEN:])
+ fname = ''
+ if sym:
+ locs = sym.get_def_locations()
+ if len(locs) == 1:
+ fname, linenum = locs[0]
+ if cwd and fname.startswith(cwd):
+ fname = fname[len(cwd) + 1:]
+ in_arch_board = not sym or (fname.startswith('arch') or
+ fname.startswith('board'))
+ if (not in_arch_board and
+ not (imply_flags & IMPLY_NON_ARCH_BOARD)):
+ continue
+
+ if add_imply and (add_imply == 'all' or
+ iconfig in add_imply):
+ fname, linenum, kconfig_info = (check_imply_rule(kconf,
+ config[CONFIG_LEN:], iconfig[CONFIG_LEN:]))
+ if fname:
+ add_list[fname].append(linenum)
+
+ if show and kconfig_info != 'skip':
+ print '%5d : %-30s%-25s %s' % (num_common, iconfig.ljust(30),
+ kconfig_info, missing_str)
+
+ # Having collected a list of things to add, now we add them. We process
+ # each file from the largest line number to the smallest so that
+ # earlier additions do not affect our line numbers. E.g. if we added an
+ # imply at line 20 it would change the position of each line after
+ # that.
+ for fname, linenums in add_list.iteritems():
+ for linenum in sorted(linenums, reverse=True):
+ add_imply_rule(config[CONFIG_LEN:], fname, linenum)
+
+
projects / u-boot / blobdiff