Init package

.gitattributes

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+/tests  export-ignore
+/.git*  export-ignore
+/*.yml  export-ignore
+/*.xml  export-ignore

.gitignore

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+# ide
+/.idea
+
+# composer
+/vendor/
+/composer.lock
+
+# phpunit
+/.phpunit.result.cache

composer.json

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+{
+    "name": "arokettu/path",
+    "description": "",
+    "keywords": [],
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Anton Smirnov",
+            "email": "[email protected]"
+        }
+    ],
+    "support": {
+    },
+    "config": {
+        "sort-packages": true
+    },
+    "autoload": {
+        "psr-4": {
+            "Arokettu\\Path\\": "src"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Arokettu\\Path\\Tests\\": "tests"
+        }
+    },
+    "require": {
+        "php": "^7.4 | ^8.0",
+        "nikic/iter": "^2.0",
+        "symfony/polyfill-php80": "^1.17"
+    },
+    "require-dev": {
+        "phpunit/phpunit": ">= 7 < 10",
+        "psy/psysh": "*",
+        "sandfox.dev/code-standard": "^[email protected]",
+        "squizlabs/php_codesniffer": "*",
+        "vimeo/psalm": "^4.11"
+    }
+}

phpcs.xml

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+<?xml version="1.0"?>
+<!--
+    @see https://github.com/squizlabs/PHP_CodeSniffer/wiki/Annotated-Ruleset
+-->
+<ruleset name="Custom Standard" namespace="MyProject\CS\Standard">
+    <rule ref="SandFox_PHP74"/>
+    <file>src</file>
+    <file>tests</file>
+</ruleset>

phpunit.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd">
+    <testsuites>
+        <testsuite name="all">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+    <coverage>
+        <include>
+            <directory>src</directory>
+        </include>
+    </coverage>
+</phpunit>

psalm.xml

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+<?xml version="1.0"?>
+<psalm
+    errorLevel="3"
+    resolveFromConfigFile="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="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+</psalm>