KotlinLintBear.py: Add ktlint

Lints your Kotlin files. Check code for coding standards and
semantical problems.

Closes coala#2152

Modified KotlinLintBear.py

Further Modified KotlinLintBear.py

bears/kotlin/KotlinLintBear.py

@@ -0,0 +1,31 @@
+import os
+
+from coalib.bearlib.abstractions.Linter import linter
+
+
+@linter(executable='ktlint',
+        use_stderr=True,
+        use_stdout=True)
+class KotlinLintBear:
+    """
+    Lints your Kotlin Files.
+    Check code for coding standards or semantical problems that might lead
+    to problems in execution of the code.
+    See https://ktlint.github.io for more info.
+    """
+    LANGUAGES = {'CSS'}
+    REQUIREMENTS = {'ktlint'}
+    AUTHORS = {'The coala developers'}
+    AUTHORS_EMAILS = {'[email protected]'}
+    LICENSE = 'AGPL-3.0'
+    CAN_DETECT = {'Formatting', 'Syntax'}
+
+    def process_output(self, output, filename, file):
+        stdout, stderr = output
+        dirpath = os.getcwd()
+        stdout = stdout.replace(dirpath+'\\', '')
+        print(stdout)
+
+    @staticmethod
+    def create_arguments(filename, file, config_file):
+        return('--color', filename)