diff options
Diffstat (limited to 'scripts/checkkconfigsymbols.py')
| -rwxr-xr-x | scripts/checkkconfigsymbols.py | 138 |
1 files changed, 132 insertions, 6 deletions
diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py index 6445693df669..ce9ca60808b8 100755 --- a/scripts/checkkconfigsymbols.py +++ b/scripts/checkkconfigsymbols.py @@ -1,6 +1,6 @@ #!/usr/bin/env python -"""Find Kconfig identifiers that are referenced but not defined.""" +"""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> @@ -10,7 +10,9 @@ import os import re +import sys from subprocess import Popen, PIPE, STDOUT +from optparse import OptionParser # regex expressions @@ -32,16 +34,140 @@ 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 undefined_b: + # feature has not been undefined before + if not feature in undefined_a: + files = undefined_b.get(feature) + print "%s\t%s" % (feature, ", ".join(files)) + # check if there are new files that reference the undefined feature + else: + files = 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 undefined: + files = undefined.get(feature) + + +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 - pop = Popen("git ls-files", stdout=PIPE, stderr=STDOUT, shell=True) - (stdout, _) = pop.communicate() # wait until finished + stdout = execute("git ls-files") if len(stdout) > 0 and stdout[-1] == "\n": stdout = stdout[:-1] @@ -62,7 +188,7 @@ def main(): for kfile in kconfig_files: parse_kconfig_file(kfile, defined_features, referenced_features) - print "Undefined symbol used\tFile list" + undefined = {} # {feature: [files]} for feature in sorted(referenced_features): # filter some false positives if feature == "FOO" or feature == "BAR" or \ @@ -73,8 +199,8 @@ def main(): # avoid false positives for kernel modules if feature[:-len("_MODULE")] in defined_features: continue - files = referenced_features.get(feature) - print "%s\t%s" % (feature, ", ".join(files)) + undefined[feature] = referenced_features.get(feature) + return undefined def parse_source_file(sfile, referenced_features): |