MP3CheckBear: Add MP3CheckBear

MP3CheckBear checks mp3 files for consistency and print
several errors and warnings.

Closes: #1519

.travis.yml

@@ -43,6 +43,7 @@ addons:
       - opam
       - php-codesniffer
       - verilator
+      - mp3check
 
 cache:
   pip: true

bears/mp3/MP3CheckBear.py

@@ -0,0 +1,34 @@
+from coalib.bearlib.abstractions.Linter import linter
+from coalib.bears.LocalBear import LocalBear
+from coalib.results.Result import Result
+from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY
+from dependency_management.requirements.DistributionRequirement import (
+    DistributionRequirement)
+
+
+@linter(executable='mp3check')
+class MP3CheckBear(LocalBear):
+    """
+    Report possible security weaknesses for MP3 files.
+    For more information,
+    consult <https://code.google.com/archive/p/mp3check/>.
+    """
+    LANGUAGES = {'MP3'}
+    REQUIREMENTS = {DistributionRequirement(apt_get='mp3check')}
+    AUTHORS = {'The coala developers'}
+    AUTHORS_EMAILS = {'[email protected]'}
+    LICENSE = 'AGPL-3.0'
+    USE_RAW_FILES = True
+
+    @staticmethod
+    def create_arguments(filename, file, config_file):
+        return '-ase', filename
+
+    def process_output(self, output, filename, file):
+        lines = output.split('\n')
+        lines = (i for i in lines)
+        for msg in lines:
+            yield Result.from_values(origin=self,
+                                     message=msg,
+                                     file=filename,
+                                     severity=RESULT_SEVERITY.MAJOR)