psalm.xml

<?xml version="1.0"?>
<psalm
    addParamDefaultToDocblockType="true"
    allowCoercionFromStringToClassConst="false"
    allowPhpStormGenerics="false"
    allowStringToStandInForClass="false"
    checkForThrowsDocblock="true"
    checkForThrowsInGlobalScope="false"
    hoistConstants="false"
    ignoreInternalFunctionFalseReturn="true"
    ignoreInternalFunctionNullReturn="true"
    memoizeMethodCallResults="true"
    rememberPropertyAssignmentsAfterCall="true"
    requireVoidReturnType="false"
    strictBinaryOperands="true"
    totallyTyped="true"
    useAssertForType="true"
    useDocblockPropertyTypes="true"
    useDocblockTypes="true"
    usePhpDocMethodsWithoutMagicCall="false"

    allowFileIncludes="true"
    hideExternalErrors="false"
    throwExceptionOnError="false"

    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="src" />
        <ignoreFiles>
            <directory name="vendor" />
        </ignoreFiles>
    </projectFiles>

    <issueHandlers>
        <LessSpecificReturnType errorLevel="info" />

        <!-- This is a series of classes which are used by other packages, so we want to suppress issues around classes not being used. -->
        <MixedReturnTypeCoercion>
            <errorLevel type="suppress">
                <file name="src/Enum/AbstractEnum.php" />
                <file name="src/Enum/EnumInterface.php" />
            </errorLevel>
        </MixedReturnTypeCoercion>
        <PossiblyUnusedMethod>
            <errorLevel type="suppress">
                <referencedMethod name="SimplePie\UtilityPack\Enum\EnumInterface::introspectKeys" />
                <referencedMethod name="SimplePie\UtilityPack\Enum\EnumInterface::hasValue" />
            </errorLevel>
        </PossiblyUnusedMethod>
        <UnusedClass>
            <errorLevel type="suppress">
                <referencedClass name="SimplePie\UtilityPack\Parser\AbstractParser" />
                <referencedClass name="SimplePie\UtilityPack\Util\Bytes" />
                <referencedClass name="SimplePie\UtilityPack\Util\QueryString" />
                <referencedClass name="SimplePie\UtilityPack\Util\Time" />
                <referencedClass name="SimplePie\UtilityPack\Util\Types" />
                <referencedClass name="SimplePie\UtilityPack\Util\Url" />
            </errorLevel>
        </UnusedClass>

        <!-- Psalm is broken and doesn't obey ignoring directories at the top level -->
        <DuplicateClass><errorLevel type="suppress"><directory name="vendor" /></errorLevel></DuplicateClass>

    </issueHandlers>
</psalm>