Fixes.

composer.json

@@ -32,6 +32,10 @@
       "dev-2": "2.x-dev"
     }
   },
+  "scripts": {
+    "lint": "phpcs src/ tests/php/",
+    "lint-clean": "phpcbf src/ tests/php/"
+  },
   "autoload": {
     "psr-4": {
       "Terraformers\\RichFilterHeader\\": "src/",

phpcs.xml.dist

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="SilverStripe">
+    <description>CodeSniffer ruleset for SilverStripe coding conventions.</description>
+
+    <file>src</file>
+    <file>tests</file>
+
+    <!-- Show progress and output sniff names on violation, and add colours -->
+    <arg value="p" />
+    <arg name="colors" />
+    <arg value="s" />
+
+    <!-- base rules are PSR-2 -->
+    <rule ref="PSR2" >
+        <!-- Current exclusions -->
+        <exclude name="PSR1.Methods.CamelCapsMethodName" />
+        <exclude name="PSR1.Files.SideEffects.FoundWithSymbols" />
+        <exclude name="PSR2.Classes.PropertyDeclaration" />
+        <exclude name="PSR2.ControlStructures.SwitchDeclaration" /> <!-- causes php notice while linting -->
+        <exclude name="PSR2.ControlStructures.SwitchDeclaration.WrongOpenercase" />
+        <exclude name="PSR2.ControlStructures.SwitchDeclaration.WrongOpenerdefault" />
+        <exclude name="PSR2.ControlStructures.SwitchDeclaration.TerminatingComment" />
+        <exclude name="PSR2.Methods.MethodDeclaration.Underscore" />
+        <exclude name="Squiz.Scope.MethodScope" />
+        <exclude name="Squiz.Classes.ValidClassName.NotCamelCaps" />
+        <exclude name="Generic.Files.LineLength.TooLong" />
+        <exclude name="PEAR.Functions.ValidDefaultValue.NotAtEnd" />
+    </rule>
+
+	<!-- PHP-PEG generated file not intended for human consumption -->
+	<exclude-pattern>*/SSTemplateParser.php$</exclude-pattern>
+</ruleset>