Make presubmit.py rules differential.

This turns the absolute list of linter rules within the presubmit.py
wrapper into a list relative to the default of the cpplint.py script.
This has the advantage that new rules are picked up when the script is
updated and that allowed violations are visible from the list.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1325833005

Cr-Commit-Position: refs/heads/master@{#30513}

tools/presubmit.py

@@ -45,62 +45,32 @@ import subprocess
 import multiprocessing
 from subprocess import PIPE
 
-# Disabled LINT rules and reason.
+# Special LINT rules diverging from default and reason.
+# build/header_guard: Our guards have the form "V8_FOO_H_", not "SRC_FOO_H_".
 # build/include_what_you_use: Started giving false positives for variables
-#  named "string" and "map" assuming that you needed to include STL headers.
-
-ENABLED_LINT_RULES = """
-build/class
-build/deprecated
-build/endif_comment
-build/forward_decl
-build/include_alpha
-build/include_order
-build/printf_format
-build/storage_class
-legal/copyright
-readability/boost
-readability/braces
-readability/casting
-readability/constructors
-readability/fn_size
-readability/function
-readability/multiline_comment
-readability/multiline_string
-readability/streams
-readability/todo
-readability/utf8
-runtime/arrays
-runtime/casting
-runtime/deprecated_fn
-runtime/explicit
-runtime/int
-runtime/memset
-runtime/mutex
-runtime/nonconf
-runtime/printf
-runtime/printf_format
-runtime/rtti
-runtime/sizeof
-runtime/string
-runtime/virtual
-runtime/vlog
-whitespace/blank_line
-whitespace/braces
-whitespace/comma
-whitespace/comments
-whitespace/ending_newline
-whitespace/indent
-whitespace/labels
-whitespace/line_length
-whitespace/newline
-whitespace/operators
-whitespace/parens
-whitespace/tab
-whitespace/todo
-""".split()
-
+#   named "string" and "map" assuming that you needed to include STL headers.
 # TODO(bmeurer): Fix and re-enable readability/check
+# TODO(mstarzinger): Fix and re-enable build/include
+# TODO(mstarzinger): Fix and re-enable readability/namespace
+
+LINT_RULES = """
+-build/c++11
+-build/header_guard
+-build/include
++build/include_alpha
+-build/include_what_you_use
+-build/namespaces
+-readability/check
+-readability/inheritance
+-readability/namespace
+-readability/nolint
++readability/streams
+-runtime/indentation_namespace
+-runtime/references
+-runtime/threadsafe_fn
+-whitespace/semicolon
+-whitespace/empty_loop_body
+""".split()
 
 LINT_OUTPUT_PATTERN = re.compile(r'^.+[:(]\d+[:)]|^Done processing')
 FLAGS_LINE = re.compile("//\s*Flags:.*--([A-z0-9-])+_[A-z0-9].*\n")
@@ -256,15 +226,15 @@ class CppLintProcessor(SourceFileProcessor):
       print 'No changes in files detected. Skipping cpplint check.'
       return True
 
-    filt = '-,' + ",".join(['+' + n for n in ENABLED_LINT_RULES])
-    command = [sys.executable, 'cpplint.py', '--filter', filt]
+    filters = ",".join([n for n in LINT_RULES])
+    command = [sys.executable, 'cpplint.py', '--filter', filters]
     cpplint = self.GetCpplintScript(join(path, "tools"))
     if cpplint is None:
       print('Could not find cpplint.py. Make sure '
             'depot_tools is installed and in the path.')
       sys.exit(1)
 
-    command = [sys.executable, cpplint, '--filter', filt]
+    command = [sys.executable, cpplint, '--filter', filters]
 
     commands = join([command + [file] for file in files])
     count = multiprocessing.cpu_count()