Add different core installer versions to Travis matrix and add own phpcs ruleset

.travis.yml

@@ -7,15 +7,15 @@ env:
 matrix:
   include:
     - php: 5.6
-      env: DB=MYSQL PHPCS_TEST=1 PHPUNIT_TEST=1
+      env: DB=MYSQL INSTALLER_VERSION=4.0.x-dev PHPCS_TEST=1 PHPUNIT_TEST=1
     - php: 7.0
-      env: DB=PGSQL PHPUNIT_TEST=1
+      env: DB=PGSQL INSTALLER_VERSION=4.1.x-dev PHPUNIT_TEST=1
     - php: 7.1
-      env: DB=MYSQL PHPUNIT_COVERAGE_TEST=1
+      env: DB=MYSQL INSTALLER_VERSION=4.1.x-dev PHPUNIT_COVERAGE_TEST=1
     - php: 7.1
-      env: DB=MYSQL PHPUNIT_TEST=1 SUBSITES=1
+      env: DB=MYSQL INSTALLER_VERSION=4.2.x-dev PHPUNIT_TEST=1 SUBSITES=1
     - php: 7.2
-      env: DB=MYSQL PHPUNIT_TEST=1
+      env: DB=MYSQL INSTALLER_VERSION=4.x-dev PHPUNIT_TEST=1
 
 before_script:
   - phpenv rehash
@@ -25,13 +25,13 @@ before_script:
   - composer require --no-update symbiote/silverstripe-queuedjobs ^4.0
   - if [[ $SUBSITES ]]; then composer require --no-update silverstripe/subsites 2.0.x-dev; fi
   - if [[ $DB == "PGSQL" ]]; then composer require --no-update silverstripe/postgresql 2.0.x-dev; fi
-  - composer require --no-update silverstripe/installer 4.0.x-dev
+  - composer require --no-update silverstripe/installer "$INSTALLER_VERSION"
   - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
 
 script:
   - if [[ $PHPUNIT_TEST ]]; then vendor/bin/phpunit; fi
   - if [[ $PHPUNIT_COVERAGE_TEST ]]; then phpdbg -qrr vendor/bin/phpunit --coverage-clover=coverage.xml; fi
-  - if [[ $PHPCS_TEST ]]; then vendor/bin/phpcs --standard=vendor/silverstripe/framework/phpcs.xml.dist src tests; fi
+  - if [[ $PHPCS_TEST ]]; then vendor/bin/phpcs src tests; fi
 
 after_success:
   - if [[ $PHPUNIT_COVERAGE_TEST ]]; then bash <(curl -s https://codecov.io/bash) -f coverage.xml; fi

phpcs.xml.dist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="SilverStripe">
+    <description>CodeSniffer ruleset for SilverStripe coding conventions.</description>
+
+    <!-- base rules are PSR-2 -->
+    <rule ref="PSR2">
+        <!-- Current exclusions -->
+        <exclude name="PSR1.Methods.CamelCapsMethodName"/>
+        <exclude name="PSR1.Files.SideEffects.FoundWithSymbols"/>
+        <exclude name="PSR2.Methods.MethodDeclaration.Underscore"/>
+        <exclude name="Squiz.Classes.ValidClassName.NotCamelCaps"/>
+        <exclude name="Generic.Files.LineLength.TooLong"/>
+    </rule>
+</ruleset>