[clang-tools-extra] r211698 - Add clang-tidy-diff.py script to run clang-tidy and display warnings on changed lines only.
Alexander Kornienko
alexfh at google.com
Wed Jun 25 07:09:52 PDT 2014
Author: alexfh
Date: Wed Jun 25 09:09:52 2014
New Revision: 211698
URL: http://llvm.org/viewvc/llvm-project?rev=211698&view=rev
Log:
Add clang-tidy-diff.py script to run clang-tidy and display warnings on changed lines only.
Reviewers: djasper
Reviewed By: djasper
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D4288
Added:
clang-tools-extra/trunk/clang-tidy/tool/clang-tidy-diff.py (with props)
clang-tools-extra/trunk/test/clang-tidy/clang-tidy-diff.cpp
Added: clang-tools-extra/trunk/clang-tidy/tool/clang-tidy-diff.py
URL: http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/clang-tidy/tool/clang-tidy-diff.py?rev=211698&view=auto
==============================================================================
--- clang-tools-extra/trunk/clang-tidy/tool/clang-tidy-diff.py (added)
+++ clang-tools-extra/trunk/clang-tidy/tool/clang-tidy-diff.py Wed Jun 25 09:09:52 2014
@@ -0,0 +1,115 @@
+#!/usr/bin/python
+#
+#===- clang-tidy-diff.py - ClangTidy Diff Checker ------------*- python -*--===#
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+#===------------------------------------------------------------------------===#
+
+r"""
+ClangTidy Diff Checker
+======================
+
+This script reads input from a unified diff, runs clang-tidy on all changed
+files and outputs clang-tidy warnings in changed lines only. This is useful to
+detect clang-tidy regressions in the lines touched by a specific patch.
+Example usage for git/svn users:
+
+ git diff -U0 HEAD^ | clang-tidy-diff.py -p1
+ svn diff --diff-cmd=diff -x-U0 | \
+ clang-tidy-diff.py -fix -checks=-*,misc-use-override
+
+"""
+
+import argparse
+import json
+import re
+import subprocess
+import sys
+
+
+def main():
+ parser = argparse.ArgumentParser(description=
+ 'Reformat changed lines in diff. Without -i '
+ 'option just output the diff that would be '
+ 'introduced.')
+ parser.add_argument('-clang-tidy-binary', metavar='PATH',
+ default='clang-tidy',
+ help='path to clang-tidy binary')
+ parser.add_argument('-p', metavar='NUM', default=0,
+ help='strip the smallest prefix containing P slashes')
+ parser.add_argument('-regex', metavar='PATTERN', default=None,
+ help='custom pattern selecting file paths to reformat '
+ '(case sensitive, overrides -iregex)')
+ parser.add_argument('-iregex', metavar='PATTERN', default=
+ r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hpp|m|mm|inc)',
+ help='custom pattern selecting file paths to reformat '
+ '(case insensitive, overridden by -regex)')
+
+ parser.add_argument('-fix', action='store_true', default=False,
+ help='apply suggested fixes')
+ parser.add_argument('-checks',
+ help='checks filter, when not specified, use clang-tidy '
+ 'default',
+ default='')
+ clang_tidy_args = []
+ argv = sys.argv[1:]
+ if '--' in argv:
+ clang_tidy_args.extend(argv[argv.index('--'):])
+ argv = argv[:argv.index('--')]
+
+ args = parser.parse_args(argv)
+
+ # Extract changed lines for each file.
+ filename = None
+ lines_by_file = {}
+ for line in sys.stdin:
+ match = re.search('^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
+ if match:
+ filename = match.group(2)
+ if filename == None:
+ continue
+
+ if args.regex is not None:
+ if not re.match('^%s$' % args.regex, filename):
+ continue
+ else:
+ if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
+ continue
+
+ match = re.search('^@@.*\+(\d+)(,(\d+))?', line)
+ if match:
+ start_line = int(match.group(1))
+ line_count = 1
+ if match.group(3):
+ line_count = int(match.group(3))
+ if line_count == 0:
+ continue
+ end_line = start_line + line_count - 1;
+ lines_by_file.setdefault(filename, []).append([start_line, end_line])
+
+ if len(lines_by_file) == 0:
+ print "No relevant changes found."
+ sys.exit(0)
+
+ line_filter_json = json.dumps(
+ [{"name" : name, "lines" : lines_by_file[name]} for name in lines_by_file],
+ separators = (',', ':'))
+
+ # Run clang-tidy on files containing changes.
+ command = [args.clang_tidy_binary]
+ command.append('-line-filter=\'' + line_filter_json + '\'')
+ if args.fix:
+ command.append('-fix')
+ if args.checks != '':
+ command.append('-checks=\'' + args.checks + '\'')
+ command.extend(lines_by_file.keys())
+ command.extend(clang_tidy_args)
+
+ sys.exit(subprocess.call(' '.join(command), shell=True))
+
+if __name__ == '__main__':
+ main()
Propchange: clang-tools-extra/trunk/clang-tidy/tool/clang-tidy-diff.py
------------------------------------------------------------------------------
svn:executable = *
Added: clang-tools-extra/trunk/test/clang-tidy/clang-tidy-diff.cpp
URL: http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/test/clang-tidy/clang-tidy-diff.cpp?rev=211698&view=auto
==============================================================================
--- clang-tools-extra/trunk/test/clang-tidy/clang-tidy-diff.cpp (added)
+++ clang-tools-extra/trunk/test/clang-tidy/clang-tidy-diff.cpp Wed Jun 25 09:09:52 2014
@@ -0,0 +1,18 @@
+// RUN: sed 's/placeholder_for_f/f/' %s > %t.cpp
+// RUN: clang-tidy -checks=-*,misc-use-override %t.cpp -- -std=c++11 | FileCheck -check-prefix=CHECK-SANITY %s
+// RUN: not diff -u0 %s %t.cpp | python %S/../../clang-tidy/tool/clang-tidy-diff.py -checks=-*,misc-use-override -- -std=c++11 2>&1 | FileCheck %s
+struct A {
+ virtual void f() {}
+ virtual void g() {}
+};
+// CHECK-NOT: warning
+struct B : public A {
+ void placeholder_for_f() {}
+// CHECK-SANITY: [[@LINE-1]]:8: warning: Use exactly
+// CHECK: [[@LINE-2]]:8: warning: Use exactly
+ void g() {}
+// CHECK-SANITY: [[@LINE-1]]:8: warning: Use exactly
+// CHECK-NOT: warning:
+};
+// CHECK-SANITY-NOT: Suppressed
+// CHECK: Suppressed 1 warnings (1 due to line filter).
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