scripts: Check all CONFIG_* in the code are defined into a Kconfig file

checkConfig script scans all '*.c', '*.h' and '*.S' looking for all
kconfig items used into the Zephyr Code and validates if they are
defined into any '*.kconfig' file.

to execute script use:
*to run with default values:
	$ checkconfig.py
*to run and get complete log of all symbols used:
	$ checkconfig.py -c
*to run from a diferent subdirectory, not zephyr base, like
 drivers/grove
	$ checkconfig.py -s drivers/grove
*to run and exclude some directories for verification:
	$checkconfig.py -e drivers

*to get more help about how to run script:
	$checkconfig.py --help

Change-Id: Ia8ddda8b560305eb73224c55645729a40fcb5863
Signed-off-by: Sonia Leon Bautista <sonia.leon.bautista@intel.com>

scripts/checkconfig.py

@@ -0,0 +1,147 @@
+#!/usr/bin/env python
+
+"""Zephyr Check kconfigs Definitions
+
+Check all CONFIG_* in the code are defined into a Kconfig file
+
+usage: checkconfig.py [-h] [-k KCONFIG] [-c] [-e EXCLUDE]
+
+"""
+
+import sys
+import os
+import re
+import argparse
+from argparse import SUPPRESS
+
+help_text="""
+Checkconfig script scans all '*.c', '*.h' and '*.S' looking for all kconfig
+items used in the Zephyr Code and validates if they are defined in any
+'*.kconfig*' file.
+
+To run script use command:
+
+checkconfig.py [-h|--help] [-c|--complete-log] [-k|--kconfig <kconfig>]
+               [-e|--exclude <dir_to_exclude>]
+
+It will send to output:
+-config name
+-location where config is used
+-full line where the config is being used
+-location were config is being defined (there could be multiple declarations)
+
+    [-c|--complete-log] is an optional parameter.
+    If it is not given it will print only the kconfigs not defined
+    If given, it will print all the kconfigs found
+
+    [-s|--subdir <subdir>] is an optional parameter.
+    When a directory is given it will start scan from that specific directorywith .
+    By default it scans from zephyr base tree
+
+    [-e|--exclude <subdir_to_exclude>] is an optional parameter.
+    When a subdirectory is given it will be appended to defaut exclude dirs list.
+    Default exclude dirs are: "doc", "sanity-out" and "outdir"
+"""
+
+#the genrest dir contains kconfiglib.py
+zephyrbase = os.environ.get('ZEPHYR_BASE')
+
+if zephyrbase == None:
+    print ("env. variable ZEPHYR_BASE is not set, "
+           "ensure you have source zephyr-env.sh")
+    exit(1)
+elif not os.path.exists(zephyrbase):
+    print ("env. variable ZEPHYR_BASE \""+ zephyrbase +
+           "\" does not exist as a valid zephyr base directory")
+    exit(1)
+
+os.environ['srctree'] = os.path.join(zephyrbase + os.path.sep)
+sys.path.append(os.path.join(zephyrbase,'doc','scripts','genrest'))
+
+import kconfiglib
+
+def separate_location_lines(dirs):
+    for dir in dirs:
+        print "    ", dir
+
+def search_kconfig_items(items, name, completelog):
+    findConfig = False
+    for item in items:
+        if item.is_symbol():
+            if (item.get_name() == name):
+                if (completelog == True):
+                    separate_location_lines(item.get_def_locations())
+                findConfig = True
+                break
+
+        elif item.is_menu():
+            if search_kconfig_items(item.get_items(), name, completelog):
+                return True
+
+        elif item.is_choice():
+            if search_kconfig_items(item.get_items(), name, completelog):
+                return True
+
+        elif item.is_comment():
+            if (item.get_text() == name):
+                print completelog
+                if (completelog == True):
+                    separate_location_lines(item.get_location())
+                findConfig = True
+                break
+    return findConfig
+
+def search_config_in_file(tree, items, completelog, exclude):
+    configs = 0
+    notdefConfig = 0
+    for dirName, subdirs, files in os.walk(tree, topdown=True):
+        subdirs[:] = [d for d in subdirs if d not in exclude]
+        for fname in files:
+            if (fname.endswith(".c") or
+            fname.endswith(".h") or
+            fname.endswith(".S")):
+                with open(os.path.join(dirName, fname), "r") as f:
+                    searchConf = f.readlines()
+                for i, line in enumerate(searchConf):
+                    if re.search('(^|[\s|(])CONFIG_([a-zA-Z0-9_]+)', line) :
+                        configName = re.search('(^|[\s|(])'
+                                               +'CONFIG_([a-zA-Z0-9_]+)', line)
+                        configs = configs + 1
+                        if (completelog == True):
+                            print ('\n' + configName.group(2) + ' at '
+                                   + os.path.join(dirName, fname))
+                            print 'line: ' + line.rstrip()
+                        find = search_kconfig_items(items, configName.group(2),
+                                                    completelog)
+                        if (find == False):
+                            print ('\n' + configName.group(2) + ' at '
+                                   + os.path.join(dirName, fname)
+                                   + ' IS NOT DEFINED')
+                            print 'line: ' + line.rstrip()
+                            notdefConfig = notdefConfig + 1
+    if (completelog == True):
+        print "\n{} Kconfigs evaluated".format(configs)
+        print "{} Kconfigs not defined".format(notdefConfig)
+
+parser = argparse.ArgumentParser(description = help_text,
+                                 usage = SUPPRESS,
+                                 formatter_class = argparse.RawTextHelpFormatter)
+parser.add_argument('-s', '--subdir', action='store', dest='subdir',
+                    default="",
+                    help='sub directory to be scanned')
+parser.add_argument('-c', '--complete-log', action='store_true',
+                    dest='completelog', default=False,
+                    help='Prints all the kconfigs found')
+parser.add_argument('-e', '--exclude', action='append', dest='exclude',
+                    default=["doc", "sanity-out", "outdir"],
+                    help='Dirs to be excluded for verification')
+
+args= parser.parse_args()
+if args.completelog:
+    print 'sub dir      = ', os.path.join(zephyrbase + args.subdir)
+    print 'complete-log = ', args.completelog
+    print 'exclude dirs = ', args.exclude
+
+conf = kconfiglib.Config(os.path.join(zephyrbase,'Kconfig'))
+search_config_in_file(os.path.join(zephyrbase + os.path.sep + args.subdir),
+                      conf.get_top_level_items(), args.completelog, args.exclude)