psalm.xml

<?xml version="1.0"?>
<psalm
    cacheDirectory="var/cache/psalm"
    ensureArrayStringOffsetsExist="true"
    findUnusedVariablesAndParams="true"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="https://getpsalm.org/schema/config"
    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
>
    <projectFiles>
        <directory name="platform/src"/>
        <directory name="src"/>
        <ignoreFiles>
            <directory name="vendor"/>
            <directory name="platform/src/Recovery"/>
            <directory name="platform/src/Docs/Resources"/>
        </ignoreFiles>
    </projectFiles>

    <issueHandlers>
        <!-- Shopware related issues which are ignored -->
        <UnusedMethodCall>
            <errorLevel type="info">
                <referencedMethod name="Symfony\Component\Config\Definition\Builder\NodeBuilder::end"/>
            </errorLevel>
        </UnusedMethodCall>
        <UnusedFunctionCall>
            <errorLevel type="info">
                <referencedFunction name="iterator_to_array"/>
            </errorLevel>
        </UnusedFunctionCall>
        <InvalidCast>
            <errorLevel type="info">
                <file name="platform/src/Core/Profiling/Twig/DoctrineExtension.php"/>
            </errorLevel>
        </InvalidCast>
        <UndefinedConstant>
            <errorLevel type="info">
                <file name="platform/src/Core/Framework/Test/Plugin/Util/PluginFinderTest.php"/>
                <file name="platform/src/Core/Framework/Test/TestCaseBase/KernelLifecycleManagerTest.php"/>
                <file name="platform/src/Core/Framework/Test/Plugin/KernelPluginLoader/DbalKernelPluginLoaderTest.php"/>
                <file name="platform/src/Core/Framework/Test/Plugin/KernelPluginLoader/StaticKernelPluginLoaderTest.php"/>
                <file name="platform/src/Core/Framework/Test/Plugin/KernelPluginIntegrationTest.php"/>
            </errorLevel>
        </UndefinedConstant>
        <InvalidScope>
            <errorLevel type="info">
                <directory name="platform/src/Core/Flag"/>
                <directory name="platform/src/Core/Framework/Test/FeatureFlag"/>
            </errorLevel>
        </InvalidScope>
        <MissingFile>
            <errorLevel type="info">
                <file name="platform/src/Core/Framework/Test/FeatureFlag/FeatureTest.php"/>
            </errorLevel>
        </MissingFile>
        <UnusedParam>
            <errorLevel type="info">
                <file name="platform/src/Core/Framework/DataAbstractionLayer/Doctrine/RetryableQuery.php"/>
            </errorLevel>
        </UnusedParam>
        <InvalidCatch>
            <errorLevel type="info">
                <file name="platform/src/Core/Framework/DataAbstractionLayer/Doctrine/RetryableQuery.php"/>
            </errorLevel>
        </InvalidCatch>
        <InaccessibleMethod>
            <errorLevel type="info">
                <file name="platform/src/Core/Framework/Test/Update/UpdateControllerTest.php"/>
            </errorLevel>
        </InaccessibleMethod>
        <UnusedVariable>
            <errorLevel type="info">
                <file name="platform/src/Storefront/Test/Theme/ThemeTest.php"/>
            </errorLevel>
        </UnusedVariable>

        <LessSpecificImplementedReturnType errorLevel="info"/>

        <!-- Issue in Psalm https://github.com/vimeo/psalm/issues/2706 -->
        <InaccessibleProperty>
            <errorLevel type="info">
                <file name="platform/src/Core/Framework/Api/Controller/CacheController.php"/>
            </errorLevel>
        </InaccessibleProperty>

        <!-- level 3 issues - slightly lazy code writing, but provably low false-negatives -->

        <DeprecatedMethod errorLevel="info"/>
        <DeprecatedProperty errorLevel="info"/>
        <DeprecatedClass errorLevel="info"/>
        <DeprecatedConstant errorLevel="info"/>
        <DeprecatedFunction errorLevel="info"/>
        <DeprecatedInterface errorLevel="info"/>
        <DeprecatedTrait errorLevel="info"/>

        <InternalMethod errorLevel="info"/>
        <InternalProperty errorLevel="info"/>
        <InternalClass errorLevel="info"/>

        <MissingClosureReturnType errorLevel="info"/>
        <MissingReturnType errorLevel="info"/>
        <MissingPropertyType errorLevel="info"/>
        <InvalidDocblock errorLevel="info"/>

        <PropertyNotSetInConstructor errorLevel="info"/>
        <MissingConstructor errorLevel="info"/>
        <MissingClosureParamType errorLevel="info"/>
        <MissingParamType errorLevel="info"/>

        <RedundantCondition errorLevel="info"/>

        <DocblockTypeContradiction errorLevel="info"/>
        <RedundantConditionGivenDocblockType errorLevel="info"/>

        <UnresolvableInclude errorLevel="info"/>

        <RawObjectIteration errorLevel="info"/>

        <InvalidStringClass errorLevel="info"/>

        <!-- level 4 issues - points to possible deficiencies in logic, higher false-positives -->

        <MoreSpecificReturnType errorLevel="info"/>
        <LessSpecificReturnStatement errorLevel="info"/>
        <TypeCoercion errorLevel="info"/>

        <PossiblyFalseReference errorLevel="info"/>
        <PossiblyInvalidArrayAccess errorLevel="info"/>
        <PossiblyInvalidArrayAssignment errorLevel="info"/>
        <PossiblyInvalidCast errorLevel="info"/>
        <PossiblyInvalidFunctionCall errorLevel="info"/>
        <PossiblyInvalidIterator errorLevel="info"/>
        <PossiblyInvalidMethodCall errorLevel="info"/>
        <PossiblyNullArrayAccess errorLevel="info"/>
        <PossiblyNullArrayAssignment errorLevel="info"/>
        <PossiblyNullArrayOffset errorLevel="info"/>
        <PossiblyNullIterator errorLevel="info"/>
        <PossiblyNullPropertyFetch errorLevel="info"/>
        <PossiblyNullReference errorLevel="info"/>
        <PossiblyUndefinedVariable errorLevel="info"/>
        <PossiblyUndefinedArrayOffset errorLevel="info"/>
        <PossiblyUndefinedMethod errorLevel="info"/>

        <!-- level 5 issues - should be avoided at mosts costs... -->

        <ImplicitToStringCast errorLevel="info"/>
        <InvalidScalarArgument errorLevel="info"/>
        <InvalidOperand errorLevel="info"/>
        <TooManyArguments errorLevel="info"/>
        <TypeDoesNotContainType errorLevel="info"/>
        <ImplementedReturnTypeMismatch errorLevel="info"/>

        <!-- level 6 issues - really bad things -->

        <InvalidNullableReturnType errorLevel="info"/>
        <NullableReturnStatement errorLevel="info"/>
        <InvalidFalsableReturnType errorLevel="info"/>
        <FalsableReturnStatement errorLevel="info"/>

        <MoreSpecificImplementedParamType errorLevel="info"/>

        <InvalidReturnStatement errorLevel="info"/>
        <InvalidReturnType errorLevel="info"/>
        <UndefinedInterfaceMethod errorLevel="info"/>

        <!-- level 7 issues - even worse -->

        <UndefinedPropertyAssignment errorLevel="info"/>
        <UndefinedThisPropertyFetch errorLevel="info"/>
        <UndefinedPropertyFetch errorLevel="info"/>

        <InvalidArgument errorLevel="info"/>
        <InvalidPropertyAssignmentValue errorLevel="info"/>
        <InvalidArrayOffset errorLevel="info"/>
    </issueHandlers>
</psalm>