bug #26661 [Translation] XLIFF2: Make sure to trim source if it is to…

…o long for "name" (Nyholm)

This PR was merged into the 4.1-dev branch.

Discussion
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[Translation] XLIFF2: Make sure to trim source if it is too long for "name"

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

This PR is a follow-up on @javiereguiluz's comment here: symfony/symfony-docs#9302

This feature was introduced in #26149

Commits
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ca41fec Make sure to trim source if it is too long

src/Symfony/Component/Translation/Dumper/XliffFileDumper.php

@@ -146,7 +146,11 @@ private function dumpXliff2($defaultLocale, MessageCatalogue $messages, $domain,
         foreach ($messages->all($domain) as $source => $target) {
             $translation = $dom->createElement('unit');
             $translation->setAttribute('id', strtr(substr(base64_encode(hash('sha256', $source, true)), 0, 7), '/+', '._'));
-            $translation->setAttribute('name', $source);
+            $name = $source;
+            if (strlen($source) > 80) {
+                $name = substr(md5($source), -7);
+            }
+            $translation->setAttribute('name', $name);
             $metadata = $messages->getMetadata($source, $domain);
 
             // Add notes section