[Buildroot] [PATCH 6/8] utils/check-package: allow to disable warning for a line

[Ricardo Martincoski <ricardo.martincoski@gmail.com>]

Currently any exceptions for a check function need to be coded into the
check-package script itself.

Create a pattern that can be used in a comment to make check-package
ignore one or more warning types in the line immediately below:
 # check-package Indent, VariableWithBraces

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
---
 utils/check-package           | 4 ++++
 utils/checkpackagelib/base.py | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/utils/check-package b/utils/check-package
index 26439f08eb..ce1fe98d67 100755
--- a/utils/check-package
+++ b/utils/check-package
@@ -119,36 +119,40 @@ def check_file_using_lib(fname):
         return nwarnings, nlines
     classes = inspect.getmembers(lib, is_a_check_function)
 
     if flags.dry_run:
         functions_to_run = [c[0] for c in classes]
         print("{}: would run: {}".format(fname, functions_to_run))
         return nwarnings, nlines
 
     objects = [c[1](fname, flags.manual_url) for c in classes]
 
     for cf in objects:
         nwarnings += print_warnings(cf.before())
     if six.PY3:
         f = open(fname, "r", errors="surrogateescape")
     else:
         f = open(fname, "r")
+    lastline = ""
     for lineno, text in enumerate(f.readlines()):
         nlines += 1
         for cf in objects:
+            if cf.disable.search(lastline):
+                continue
             nwarnings += print_warnings(cf.check_line(lineno + 1, text))
+        lastline = text
     f.close()
     for cf in objects:
         nwarnings += print_warnings(cf.after())
 
     return nwarnings, nlines
 
 
 def __main__():
     global flags
     flags = parse_args()
 
     if flags.intree_only:
         # change all paths received to be relative to the base dir
         base_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
         files_to_check = [os.path.relpath(os.path.abspath(f), base_dir) for f in flags.files]
         # move current dir so the script find the files
diff --git a/utils/checkpackagelib/base.py b/utils/checkpackagelib/base.py
index fc09bec9a2..9544a64e5a 100644
--- a/utils/checkpackagelib/base.py
+++ b/utils/checkpackagelib/base.py
@@ -1,16 +1,18 @@
 # See utils/checkpackagelib/readme.txt before editing this file.
+import re
 
 
 class _CheckFunction(object):
     def __init__(self, filename, url_to_manual):
         self.filename = filename
         self.url_to_manual = url_to_manual
+        self.disable = re.compile(r"^\s*# check-package .*\b{}\b".format(self.__class__.__name__))
 
     def before(self):
         pass
 
     def check_line(self, lineno, text):
         pass
 
     def after(self):
         pass
-- 
2.17.1