Initial commit

.gitattributes

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+/.github        export-ignore
+/.phive         export-ignore
+/.psalm         export-ignore
+/tests          export-ignore
+/tools          export-ignore
+/tools/*        binary
+/.gitattributes export-ignore
+/.gitignore     export-ignore
+/.php-cs-fixer.dist.php   export-ignore
+/build.xml      export-ignore
+/phpunit.xml    export-ignore
+
+*.php diff=php

.github/FUNDING.yml

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+github: sebastianbergmann

.github/workflows/ci.yml

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+# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
+
+on:
+  - "pull_request"
+  - "push"
+
+name: "CI"
+
+permissions:
+  contents: read
+
+jobs:
+  coding-guidelines:
+    name: Coding Guidelines
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.2
+          coverage: none
+
+      - name: Run PHP-CS-Fixer
+        run: ./tools/php-cs-fixer fix --dry-run --show-progress=dots --using-cache=no --verbose
+
+  type-checker:
+    name: Type Checker
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.2
+          coverage: none
+
+      - name: Install dependencies with Composer
+        run: ./tools/composer update --no-interaction --no-ansi --no-progress
+
+      - name: Run Psalm
+        run: ./tools/psalm --config=.psalm/config.xml --no-progress --shepherd --show-info=false --stats
+
+  tests:
+    name: Tests
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version:
+          - "8.2"
+          - "8.3"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v3"
+
+      - name: "Install PHP with extensions"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "${{ matrix.php-version }}"
+          coverage: "pcov"
+
+      - name: "Install dependencies with Composer"
+        run: "./tools/composer update --no-ansi --no-interaction --no-progress"
+
+      - name: "Run tests with PHPUnit"
+        run: "./tools/phpunit --coverage-clover=coverage.xml"
+
+      - name: "Send code coverage report to Codecov.io"
+        env:
+          CODECOV_TOKEN: "${{ secrets.CODECOV_TOKEN }}"
+        run: "bash <(curl -s https://codecov.io/bash) || true"
+
+  mutation-tests:
+    name: Mutation Tests
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v3"
+
+      - name: "Install PHP with extensions"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "8.2"
+          coverage: "pcov"
+
+      - name: "Install dependencies with Composer"
+        run: "./tools/composer update --no-ansi --no-interaction --no-progress"
+
+      - name: "Run mutation tests with Infection"
+        run: "./tools/infection"

.gitignore

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+/.idea
+/.php-cs-fixer.php
+/.php-cs-fixer.cache
+/.phpunit.cache
+/composer.lock
+/vendor

.phive/phars.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<phive xmlns="https://phar.io/phive">
+  <phar name="composer" version="^2.5" installed="2.5.5" location="./tools/composer" copy="true"/>
+  <phar name="phpunit" version="^10.0" installed="10.0.18" location="./tools/phpunit" copy="true"/>
+  <phar name="php-cs-fixer" version="^3.15" installed="3.15.1" location="./tools/php-cs-fixer" copy="true"/>
+  <phar name="psalm" version="^5.8" installed="5.8.0" location="./tools/psalm" copy="true"/>
+  <phar name="infection" version="^0.26" installed="0.26.19" location="./tools/infection" copy="true"/>
+</phive>