bears.configfile: Add new bear - PuppetLintBear

The PuppetLintBear runs the `puppet-lint` utility on files give by coala
and gives results based on this.

Closes #46

Gemfile

@@ -5,3 +5,4 @@ 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"

bears/configfiles/PuppetLintBear.py

@@ -0,0 +1,26 @@
+from coalib.bearlib.abstractions.Linter import linter
+from coalib.bears.requirements.GemRequirement import GemRequirement
+
+
+@linter(executable='puppet-lint',
+        output_format='regex',
+        output_regex=r'(?P<line>\d+):(?P<column>\d+):'
+                     r'(?P<severity>warning|error):(?P<message>.+)')
+class PuppetLintBear:
+    '''
+    Check and correct puppet configuration files using ``puppet-lint``.
+
+    See <http://puppet-lint.com/> for details about the tool.
+    '''
+
+    LANGUAGES = {"Puppet"}
+    REQUIREMENTS = {GemRequirement('puppet-lint', '2')}
+    AUTHORS = {'The coala developers'}
+    AUTHORS_EMAILS = {'[email protected]'}
+    LICENSE = 'AGPL-3.0'
+    CAN_FIX = {'Syntax'}
+
+    @staticmethod
+    def create_arguments(filename, file, config_file):
+        return ('--log-format', "%{line}:%{column}:%{kind}:%{message}",
+                filename)

tests/configfiles/PuppetLintBearTest.py

@@ -0,0 +1,17 @@
+from bears.configfiles.PuppetLintBear import PuppetLintBear
+from tests.LocalBearTestHelper import verify_local_bear
+
+good_file = """
+file { '/some.conf':
+  ensure => present,
+}
+"""
+
+bad_file = """
+# foo
+class test::foo { }
+"""
+
+PuppetLintBearTest = verify_local_bear(PuppetLintBear,
+                                       valid_files=(good_file,),
+                                       invalid_files=(bad_file,))