minor symfony#60680 Fix building packages in the CI (nicolas-grekas)

This PR was merged into the 6.4 branch.

Discussion
----------

Fix building packages in the CI

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

Instead of symfony#60672

Commits
-------

51205c8 Fix building packages in the CI

Author: nicolas-grekas

.github/build-packages.php

@@ -1,8 +1,14 @@
 <?php
 
-require __DIR__.'/vendor/autoload.php';
-
-use Composer\MetadataMinifier\MetadataMinifier;
+// Logic inspired from composer/metadata-minifier
+function expandComposerMetadata(array $versions): array
+{
+    array_reduce($versions, function ($carry, $version) use (&$expandedVersions) {
+        return $expandedVersions[] = array_filter(array_merge($carry, $version), fn ($v) => '__unset' !== $v);
+    }, []);
+
+    return $expandedVersions ?? [];
+}
 
 if (3 > $_SERVER['argc']) {
     echo "Usage: branch version dir1 dir2 ... dirN\n";
@@ -56,24 +62,14 @@
 
     $packages[$package->name][$package->version] = $package;
 
-    if (false !== $taggedReleases = @file_get_contents('https://repo.packagist.org/p2/'.$package->name.'.json')) {
-        $versions = MetadataMinifier::expand(json_decode($taggedReleases, true)['packages'][$package->name]);
+    foreach (['.json', '~dev.json'] as $ext) {
+        $versions = @file_get_contents('https://repo.packagist.org/p2/'.$package->name.$ext) ?: '[]';
+        $versions = json_decode($versions, true)['packages'][$package->name] ?? [];
 
-        foreach ($versions as $v => $p) {
-            $packages[$package->name] += [$v => $p];
+        foreach (expandComposerMetadata($versions) as $p) {
+            $packages[$package->name] += [$p['version'] => $p];
         }
     }
-
-    if (false !== $devReleases = @file_get_contents('https://repo.packagist.org/p2/'.$package->name.'~dev.json')) {
-        $versions = MetadataMinifier::expand(json_decode($taggedReleases, true)['packages'][$package->name]);
-    } else {
-        $versions = sprintf('{"packages":{"%s":{"%s":%s}}}', $package->name, $package->version, file_get_contents($dir.'/composer.json'));
-        $versions = json_decode($versions, true)['packages'][$package->name];
-    }
-
-    foreach ($versions as $v => $p) {
-        $packages[$package->name] += [$v => $p];
-    }
 }
 
 file_put_contents('packages.json', json_encode(compact('packages'), $flags));

.github/composer.json

@@ -92,18 +92,12 @@ jobs:
 
           # Create local composer packages for each patched components and reference them in composer.json files when cross-testing components
           if [[ ! "${{ matrix.mode }}" = *-deps ]]; then
-              cd .github
-              composer install
-              php ./build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
-              cd ..
+              php .github/build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
           else
             echo SYMFONY_DEPRECATIONS_HELPER=weak >> $GITHUB_ENV
             cp composer.json composer.json.orig
             echo -e '{\n"require":{'"$(grep phpunit-bridge composer.json)"'"php":"*"},"minimum-stability":"dev"}' > composer.json
-            cd .github
-            composer install
-            php ./build-packages.php HEAD^ $SYMFONY_VERSION $(find src/Symfony -mindepth 2 -type f -name composer.json -printf '%h\n' | grep -v src/Symfony/Component/Intl/Resources/emoji)
-            cd ..
+            php .github/build-packages.php HEAD^ $SYMFONY_VERSION $(find src/Symfony -mindepth 2 -type f -name composer.json -printf '%h\n' | grep -v src/Symfony/Component/Intl/Resources/emoji)
             mv composer.json composer.json.phpunit
             mv composer.json.orig composer.json
           fi