Bears: Add CsvLintBear

Closes coala#927

Gemfile

@@ -1,8 +1,9 @@
 source 'https://rubygems.org'
-ruby '2.1.5'
+ruby '2.2.2'
 
 gem "rubocop"
 gem "sqlint"
 gem 'scss_lint', require: false# require flag is necessary https://github.com/brigade/scss-lint#installation
 gem "reek"
 gem "puppet-lint"
+gem "csvlint"

bears/csv/CsvLintBear.py

@@ -0,0 +1,22 @@
+from coalib.bearlib.abstractions.Linter import linter
+
+
+@linter(executable='csvlint',
+        output_format='regex',
+        output_regex=r'\d\. (?P<message>.+)\. Row:'
+                     r' (?P<row>\d+)\. (?P<information>.+)',
+        result_message='This ``csv`` file is invalid.')
+class CsvLintBear:
+    """
+    Verifies using ``csvlint`` if ``.csv`` files are valid csv or not.
+    """
+
+    LANGUAGES = {"csv"}
+    AUTHORS = {'The coala developers'}
+    AUTHORS_EMAILS = {'[email protected]'}
+    LICENSE = 'AGPL-3.0'
+    CAN_DETECT = {'Syntax'}
+
+    @staticmethod
+    def create_arguments(filename, file, config_file):
+        return filename,

tests/csv/CsvLintBearTest.py

@@ -0,0 +1,22 @@
+from bears.csv.CsvLintBear import CsvLintBear
+from tests.LocalBearTestHelper import verify_local_bear
+
+good_file = """
+id,first_name,last_name,email,gender,ip_address
+1,Cynthia,Rogers,[email protected],Female,158.131.39.207
+2,Lisa,Carroll,[email protected],Female,157.69.195.53
+3,Kevin,Baker,[email protected],Male,113.189.69.4
+"""
+
+
+bad_file = """
+id,first_name,last_name,email,gender,ip_address
+1,Cynthia,Rogers,[email protected],Female,158.131.39.207
+2,Lisa,Carroll,[email protected],157.69.195.53
+3,Kevin,Baker,[email protected],Male,113.189.69.4
+"""
+
+
+CsvLintBearTest = verify_local_bear(CsvLintBear,
+                                    valid_files=(good_file,),
+                                    invalid_files=(bad_file,))