--- /dev/null
+#!/usr/bin/env python
+
+"""Find Kconfig symbols that are referenced but not defined."""
+
+# (c) 2014-2015 Valentin Rothberg <Valentin.Rothberg@lip6.fr>
+# (c) 2014 Stefan Hengelein <stefan.hengelein@fau.de>
+#
+# Licensed under the terms of the GNU GPL License version 2
+
+
+import os
+import re
+import sys
+from subprocess import Popen, PIPE, STDOUT
+from optparse import OptionParser
+
+
+# regex expressions
+OPERATORS = r"&|\(|\)|\||\!"
+FEATURE = r"(?:\w*[A-Z0-9]\w*){2,}"
+DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
+EXPR = r"(?:" + OPERATORS + r"|\s|" + FEATURE + r")+"
+STMT = r"^\s*(?:if|select|depends\s+on)\s+" + EXPR
+SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
+
+# regex objects
+REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
+REGEX_FEATURE = re.compile(r"(" + FEATURE + r")")
+REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
+REGEX_KCONFIG_DEF = re.compile(DEF)
+REGEX_KCONFIG_EXPR = re.compile(EXPR)
+REGEX_KCONFIG_STMT = re.compile(STMT)
+REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
+REGEX_FILTER_FEATURES = re.compile(r"[A-Za-z0-9]$")
+
+
+def parse_options():
+ """The user interface of this module."""
+ usage = "%prog [options]\n\n" \
+ "Run this tool to detect Kconfig symbols that are referenced but " \
+ "not defined in\nKconfig. The output of this tool has the " \
+ "format \'Undefined symbol\\tFile list\'\n\n" \
+ "If no option is specified, %prog will default to check your\n" \
+ "current tree. Please note that specifying commits will " \
+ "\'git reset --hard\'\nyour current tree! You may save " \
+ "uncommitted changes to avoid losing data."
+
+ parser = OptionParser(usage=usage)
+
+ parser.add_option('-c', '--commit', dest='commit', action='store',
+ default="",
+ help="Check if the specified commit (hash) introduces "
+ "undefined Kconfig symbols.")
+
+ parser.add_option('-d', '--diff', dest='diff', action='store',
+ default="",
+ help="Diff undefined symbols between two commits. The "
+ "input format bases on Git log's "
+ "\'commmit1..commit2\'.")
+
+ parser.add_option('', '--force', dest='force', action='store_true',
+ default=False,
+ help="Reset current Git tree even when it's dirty.")
+
+ (opts, _) = parser.parse_args()
+
+ if opts.commit and opts.diff:
+ sys.exit("Please specify only one option at once.")
+
+ if opts.diff and not re.match(r"^[\w\-\.]+\.\.[\w\-\.]+$", opts.diff):
+ sys.exit("Please specify valid input in the following format: "
+ "\'commmit1..commit2\'")
+
+ if opts.commit or opts.diff:
+ if not opts.force and tree_is_dirty():
+ sys.exit("The current Git tree is dirty (see 'git status'). "
+ "Running this script may\ndelete important data since it "
+ "calls 'git reset --hard' for some performance\nreasons. "
+ " Please run this script in a clean Git tree or pass "
+ "'--force' if you\nwant to ignore this warning and "
+ "continue.")
+
+ return opts
+
+
+def main():
+ """Main function of this module."""
+ opts = parse_options()
+
+ if opts.commit or opts.diff:
+ head = get_head()
+
+ # get commit range
+ commit_a = None
+ commit_b = None
+ if opts.commit:
+ commit_a = opts.commit + "~"
+ commit_b = opts.commit
+ elif opts.diff:
+ split = opts.diff.split("..")
+ commit_a = split[0]
+ commit_b = split[1]
+ undefined_a = {}
+ undefined_b = {}
+
+ # get undefined items before the commit
+ execute("git reset --hard %s" % commit_a)
+ undefined_a = check_symbols()
+
+ # get undefined items for the commit
+ execute("git reset --hard %s" % commit_b)
+ undefined_b = check_symbols()
+
+ # report cases that are present for the commit but not before
+ for feature in sorted(undefined_b):
+ # feature has not been undefined before
+ if not feature in undefined_a:
+ files = sorted(undefined_b.get(feature))
+ print "%s\t%s" % (feature, ", ".join(files))
+ # check if there are new files that reference the undefined feature
+ else:
+ files = sorted(undefined_b.get(feature) -
+ undefined_a.get(feature))
+ if files:
+ print "%s\t%s" % (feature, ", ".join(files))
+
+ # reset to head
+ execute("git reset --hard %s" % head)
+
+ # default to check the entire tree
+ else:
+ undefined = check_symbols()
+ for feature in sorted(undefined):
+ files = sorted(undefined.get(feature))
+ print "%s\t%s" % (feature, ", ".join(files))
+
+
+def execute(cmd):
+ """Execute %cmd and return stdout. Exit in case of error."""
+ pop = Popen(cmd, stdout=PIPE, stderr=STDOUT, shell=True)
+ (stdout, _) = pop.communicate() # wait until finished
+ if pop.returncode != 0:
+ sys.exit(stdout)
+ return stdout
+
+
+def tree_is_dirty():
+ """Return true if the current working tree is dirty (i.e., if any file has
+ been added, deleted, modified, renamed or copied but not committed)."""
+ stdout = execute("git status --porcelain")
+ for line in stdout:
+ if re.findall(r"[URMADC]{1}", line[:2]):
+ return True
+ return False
+
+
+def get_head():
+ """Return commit hash of current HEAD."""
+ stdout = execute("git rev-parse HEAD")
+ return stdout.strip('\n')
+
+
+def check_symbols():
+ """Find undefined Kconfig symbols and return a dict with the symbol as key
+ and a list of referencing files as value."""
+ source_files = []
+ kconfig_files = []
+ defined_features = set()
+ referenced_features = dict() # {feature: [files]}
+
+ # use 'git ls-files' to get the worklist
+ stdout = execute("git ls-files")
+ if len(stdout) > 0 and stdout[-1] == "\n":
+ stdout = stdout[:-1]
+
+ for gitfile in stdout.rsplit("\n"):
+ if ".git" in gitfile or "ChangeLog" in gitfile or \
+ ".log" in gitfile or os.path.isdir(gitfile) or \
+ gitfile.startswith("tools/"):
+ continue
+ if REGEX_FILE_KCONFIG.match(gitfile):
+ kconfig_files.append(gitfile)
+ else:
+ # all non-Kconfig files are checked for consistency
+ source_files.append(gitfile)
+
+ for sfile in source_files:
+ parse_source_file(sfile, referenced_features)
+
+ for kfile in kconfig_files:
+ parse_kconfig_file(kfile, defined_features, referenced_features)
+
+ undefined = {} # {feature: [files]}
+ for feature in sorted(referenced_features):
+ # filter some false positives
+ if feature == "FOO" or feature == "BAR" or \
+ feature == "FOO_BAR" or feature == "XXX":
+ continue
+ if feature not in defined_features:
+ if feature.endswith("_MODULE"):
+ # avoid false positives for kernel modules
+ if feature[:-len("_MODULE")] in defined_features:
+ continue
+ undefined[feature] = referenced_features.get(feature)
+ return undefined
+
+
+def parse_source_file(sfile, referenced_features):
+ """Parse @sfile for referenced Kconfig features."""
+ lines = []
+ with open(sfile, "r") as stream:
+ lines = stream.readlines()
+
+ for line in lines:
+ if not "CONFIG_" in line:
+ continue
+ features = REGEX_SOURCE_FEATURE.findall(line)
+ for feature in features:
+ if not REGEX_FILTER_FEATURES.search(feature):
+ continue
+ sfiles = referenced_features.get(feature, set())
+ sfiles.add(sfile)
+ referenced_features[feature] = sfiles
+
+
+def get_features_in_line(line):
+ """Return mentioned Kconfig features in @line."""
+ return REGEX_FEATURE.findall(line)
+
+
+def parse_kconfig_file(kfile, defined_features, referenced_features):
+ """Parse @kfile and update feature definitions and references."""
+ lines = []
+ skip = False
+
+ with open(kfile, "r") as stream:
+ lines = stream.readlines()
+
+ for i in range(len(lines)):
+ line = lines[i]
+ line = line.strip('\n')
+ line = line.split("#")[0] # ignore comments
+
+ if REGEX_KCONFIG_DEF.match(line):
+ feature_def = REGEX_KCONFIG_DEF.findall(line)
+ defined_features.add(feature_def[0])
+ skip = False
+ elif REGEX_KCONFIG_HELP.match(line):
+ skip = True
+ elif skip:
+ # ignore content of help messages
+ pass
+ elif REGEX_KCONFIG_STMT.match(line):
+ features = get_features_in_line(line)
+ # multi-line statements
+ while line.endswith("\\"):
+ i += 1
+ line = lines[i]
+ line = line.strip('\n')
+ features.extend(get_features_in_line(line))
+ for feature in set(features):
+ paths = referenced_features.get(feature, set())
+ paths.add(kfile)
+ referenced_features[feature] = paths
+
+
+if __name__ == "__main__":
+ main()
Code Review / kvmfornfv.git / blobdiff