feature: add possibility to downgrade releases

.gitattributes

@@ -1,12 +1,15 @@
 *.php text eol=lf
 
 .github/ export-ignore
+bin/ export-ignore
 tests/ export-ignore
 .editorconfig export-ignore
 .gitattributes export-ignore
 .gitignore export-ignore
 .php-cs-fixer.dist.php export-ignore
+src/ComposerJsonRewriter.php export-ignore
 src/ComposerScripts.php export-ignore
 phpunit.dist.xml export-ignore
 phpstan.neon.dist export-ignore
 phpstan-baseline.php export-ignore
+rector-downgrade.php export-ignore

.github/workflows/release.yml

@@ -5,20 +5,98 @@ on:
     tags:
       - '**'
 
+env:
+  COMPOSER_ROOT_VERSION: '1.x-dev'
+  DEFAULT_BRANCH: '1.x'
+  TARGET_PHP_VERSION: '7.4'
+  TARGET_PHP_VERSION_ID: 70400
+
 jobs:
   build:
     name: Create a release
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
       - name: Create release
-        uses: actions/create-release@latest
-        env:
-          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+        uses: crazy-max/ghaction-github-release@v2
         with:
-          tag_name: ${{ github.ref }}
-          release_name: ${{ github.ref }}
+          token: ${{ secrets.RELEASE_TOKEN }}
           draft: true
           prerelease: false
+
+  build_downgraded_release:
+    name: Build release for lower PHP version
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 10
+
+    permissions:
+      # Give the default GITHUB_TOKEN write permission to commit and push the
+      # added or changed files to the repository.
+      contents: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup PHP 8.1
+        uses: shivammathur/setup-php@v2
+        with:
+            php-version: '8.1'
+            coverage: none
+        env:
+            COMPOSER_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+
+      - name: Get branch name
+        id: branch_name
+        run: echo "BRANCH=build-downgrade-to-${{ env.TARGET_PHP_VERSION_ID }}" >> $GITHUB_OUTPUT
+
+      - name: Install dependencies
+        run: composer update --ansi
+
+      - name: Downgrade src
+        run: php bin/transform-source ${{ env.TARGET_PHP_VERSION_ID }}
+
+      - name: Setup PHP ${{ env.TARGET_PHP_VERSION }}
+        uses: shivammathur/setup-php@v2
+        with:
+            php-version: ${{ env.TARGET_PHP_VERSION }}
+            coverage: none
+        env:
+            COMPOSER_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+
+      - name: Get tag for downgraded release
+        id: tag-downgraded
+        run: echo "${{ format('DOWNGRADED_TAG={0}.{1}', github.ref_name, env.TARGET_PHP_VERSION_ID) }}" >> $GITHUB_OUTPUT
+
+      - name: Import GPG signing information
+        uses: crazy-max/ghaction-import-gpg@v6
+        with:
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.PASSPHRASE }}
+          git_config_global: true
+          git_user_signingkey: true
+          git_commit_gpgsign: true
+          git_tag_gpgsign: true
+
+      - name: Commit and tag
+        uses: stefanzweifel/git-auto-commit-action@v4
+        env:
+          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+        with:
+          commit_message: 'Release PHPStan CodeIgniter to target PHP ${{ env.TARGET_PHP_VERSION }}'
+          branch: ${{ steps.branch_name.outputs.BRANCH }}
+          tagging_message: ${{ steps.tag-downgraded.outputs.DOWNGRADED_TAG }}
+          commit_options: '--gpg-sign'
+          commit_user_name: paulbalandan
+          commit_user_email: [email protected]
+          add_options: '-u'
+          create_branch: true
+
+      - name: Delete branch
+        run: |
+          git switch ${{ env.DEFAULT_BRANCH }}
+          git branch -D ${{ steps.branch_name.outputs.BRANCH }}

.php-cs-fixer.dist.php

@@ -20,11 +20,14 @@
 $finder = Finder::create()
     ->files()
     ->in([
+        __DIR__ . '/bin',
         __DIR__ . '/src',
         __DIR__ . '/tests',
     ])
     ->append([
         __FILE__,
+        __DIR__ . '/bin/parse-php-version',
+        __DIR__ . '/bin/transform-source',
     ]);
 
 $overrides = [

bin/rector-downgrade.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) 2023 CodeIgniter Foundation <[email protected]>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+use Rector\Config\RectorConfig;
+use Rector\DowngradePhp80\Rector\Catch_\DowngradeNonCapturingCatchesRector;
+use Rector\DowngradePhp80\Rector\Class_\DowngradePropertyPromotionRector;
+use Rector\DowngradePhp80\Rector\ClassMethod\DowngradeTrailingCommasInParamUseRector;
+use Rector\DowngradePhp80\Rector\FunctionLike\DowngradeMixedTypeDeclarationRector;
+use Rector\DowngradePhp80\Rector\FunctionLike\DowngradeUnionTypeDeclarationRector;
+use Rector\DowngradePhp80\Rector\Property\DowngradeUnionTypeTypedPropertyRector;
+use Rector\DowngradePhp81\Rector\FunctionLike\DowngradePureIntersectionTypeRector;
+use Rector\DowngradePhp81\Rector\Property\DowngradeReadonlyPropertyRector;
+
+return static function (RectorConfig $config): void {
+    $targetPhpVersionId = (int) getenv('TARGET_PHP_VERSION_ID');
+
+    $config->paths([__DIR__ . '/../src']);
+    $config->phpVersion($targetPhpVersionId);
+    $config->disableParallel();
+
+    if ($targetPhpVersionId < 80100) {
+        $config->rule(DowngradePureIntersectionTypeRector::class);
+        $config->rule(DowngradeReadonlyPropertyRector::class);
+    }
+
+    if ($targetPhpVersionId < 80000) {
+        $config->rule(DowngradeNonCapturingCatchesRector::class);
+        $config->rule(DowngradePropertyPromotionRector::class);
+        $config->rule(DowngradeTrailingCommasInParamUseRector::class);
+        $config->rule(DowngradeMixedTypeDeclarationRector::class);
+        $config->rule(DowngradeUnionTypeDeclarationRector::class);
+        $config->rule(DowngradeUnionTypeTypedPropertyRector::class);
+    }
+};

bin/transform-source

@@ -0,0 +1,24 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) 2023 CodeIgniter Foundation <[email protected]>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use CodeIgniter\PHPStan\ComposerJsonRewriter;
+
+$targetPhpVersionId = (int) $argv[1];
+
+putenv("TARGET_PHP_VERSION_ID={$targetPhpVersionId}");
+echo 'TARGET_PHP_VERSION_ID: ' . $targetPhpVersionId . PHP_EOL . PHP_EOL;
+
+(new ComposerJsonRewriter())->rewriteUsingPhp($targetPhpVersionId);
+passthru('php vendor/bin/rector process -c bin/rector-downgrade.php --ansi --no-diffs');
+passthru('php vendor/bin/php-cs-fixer fix -v --ansi');

composer.json

@@ -34,7 +34,8 @@
         "phpstan/phpstan-deprecation-rules": "^1.1",
         "phpstan/phpstan-phpunit": "^1.3",
         "phpstan/phpstan-strict-rules": "^1.5",
-        "phpunit/phpunit": "^10.2"
+        "phpunit/phpunit": "^10.2",
+        "rector/rector": "^0.18.2"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,

phpstan.neon.dist

@@ -10,6 +10,7 @@ parameters:
     - tests
   excludePaths:
     analyseAndScan:
+      - src/ComposerJsonRewriter.php
       - src/ComposerScripts.php
       - tests/Fixtures
   tmpDir: build/phpstan

src/ComposerJsonRewriter.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) 2023 CodeIgniter Foundation <[email protected]>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\PHPStan;
+
+use RuntimeException;
+
+/**
+ * @internal
+ */
+final class ComposerJsonRewriter
+{
+    private string $composerJson = __DIR__ . '/../composer.json';
+
+    /**
+     * @var array<int, string>
+     */
+    private array $replacements = [
+        70400 => '^7.4 || ^8.0',
+        80000 => '^8.0',
+    ];
+
+    public function rewriteUsingPhp(int $targetPhpVersionId): void
+    {
+        if (! isset($this->replacements[$targetPhpVersionId])) {
+            throw new RuntimeException(sprintf('Rewriting composer.json to PHP_VERSION_ID %d is not supported.', $targetPhpVersionId));
+        }
+
+        $composerJson = json_decode((string) @file_get_contents($this->composerJson), true, 512, JSON_THROW_ON_ERROR);
+
+        $composerJson['require']['php'] = $this->replacements[$targetPhpVersionId];
+
+        $composerJson = json_encode($composerJson, JSON_PRETTY_PRINT | JSON_NUMERIC_CHECK | JSON_THROW_ON_ERROR | JSON_UNESCAPED_SLASHES) . "\n";
+
+        if (file_put_contents($this->composerJson, $composerJson) === false) {
+            throw new RuntimeException('Rewriting to composer.json failed.');
+        }
+    }
+}