Add Coala Bear for the license header check.

Reviewed By: Itms
Differential Revision: https://code.wildfiregames.com/D404
This was SVN commit r22010.

.coafile

@@ -1,5 +1,5 @@
 [Source]
-bears = CPPCheckBear
+bears = CPPCheckBear, LicenseYearBear
 files = source/**.(cpp|h)
 ignore = source/third_party/**
 

build/coala/LicenseYearBear.py

@@ -0,0 +1,59 @@
+from coalib.bears.LocalBear import LocalBear
+from coalib.results.Result import Result
+from os.path import getmtime
+from re import compile
+from datetime import date
+# Requires https://pypi.python.org/pypi/svn
+from svn.local import LocalClient
+from svn.exception import SvnException
+
+
+class LicenseYearBear(LocalBear):
+
+    """
+        Detects a wrong year of a license header
+    """
+
+    LANGUAGES = {'C', 'C++'}
+    AUTHORS = {'Vladislav Belov'}
+    LICENSE = 'GPL-2.0'
+    CAN_DETECT = {'Documentation', 'Formatting'}
+
+    def get_last_modification(self, filename):
+        client = LocalClient(filename)
+        was_modified = False
+        for status in client.status():
+            if status.type_raw_name == 'modified':
+                was_modified = True
+                break
+        if not was_modified:
+            try:
+                return client.info()['commit_date'].year
+            except SvnException:
+                return None
+        else:
+            return date.today().year
+
+    def run(self, filename, file):
+        modification_year = self.get_last_modification(filename)
+        if not modification_year:
+            return
+        license_regexp = compile('/\* Copyright \([cC]?\) ([\d]+) Wildfire Games')
+
+        for line_number, line in enumerate(file):
+            match = license_regexp.search(line)
+            if not match:
+                break
+
+            license_year = match.group(1)
+            if not license_year:
+                break
+
+            license_year = int(license_year)
+            if modification_year == license_year:
+                break
+
+            return [Result.from_values(origin=self,
+                message='License should have "%d" year instead of "%d"' % (modification_year, license_year),
+                file=filename, line=line_number + 1)]
+