deprecated not passing dash symbol (-) to STDIN commands

UPGRADE-4.4.md

@@ -207,12 +207,14 @@ Translation
 -----------
 
  * Deprecated support for using `null` as the locale in `Translator`.
+ * Deprecated accepting STDIN implicitly when using the `lint:xliff` command, use `lint:xliff -` (append a dash) instead to make it explicit.
 
 TwigBridge
 ----------
 
  * Deprecated to pass `$rootDir` and `$fileLinkFormatter` as 5th and 6th argument respectively to the
    `DebugCommand::__construct()` method, swap the variables position.
+ * Deprecated accepting STDIN implicitly when using the `lint:twig` command, use `lint:twig -` (append a dash) instead to make it explicit.
    
 TwigBundle
 ----------
@@ -326,3 +328,8 @@ WebServerBundle
 ---------------
 
  * The bundle is deprecated and will be removed in 5.0.
+ 
+Yaml
+----
+
+* Deprecated accepting STDIN implicitly when using the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit.

UPGRADE-5.0.md

@@ -531,6 +531,7 @@ Translation
  * The `MessageSelector`, `Interval` and `PluralizationRules` classes have been removed, use `IdentityTranslator` instead
  * The `Translator::getFallbackLocales()` and `TranslationDataCollector::getFallbackLocales()` method are now internal
  * The `Translator::transChoice()` method has been removed in favor of using `Translator::trans()` with "%count%" as the parameter driving plurals
+ * Removed support for implicit STDIN usage in the `lint:xliff` command, use `lint:xliff -` (append a dash) instead to make it explicit.
 
 TwigBundle
 ----------
@@ -548,6 +549,7 @@ TwigBridge
  * removed the `$requestStack` and `$requestContext` arguments of the
    `HttpFoundationExtension`, pass a `Symfony\Component\HttpFoundation\UrlHelper`
    instance as the only argument instead
+ * Removed support for implicit STDIN usage in the `lint:twig` command, use `lint:twig -` (append a dash) instead to make it explicit.
 
 Validator
 --------
@@ -653,6 +655,7 @@ Yaml
 
  * The parser is now stricter and will throw a `ParseException` when a
    mapping is found inside a multi-line string.
+ * Removed support for implicit STDIN usage in the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit.
 
 WebProfilerBundle
 -----------------

src/Symfony/Bridge/Twig/CHANGELOG.md

@@ -8,6 +8,7 @@ CHANGELOG
  * deprecated to pass `$rootDir` and `$fileLinkFormatter` as 5th and 6th argument respectively to the 
    `DebugCommand::__construct()` method, swap the variables position.
  * the `LintCommand` lints all the templates stored in all configured Twig paths if none argument is provided
+ * deprecated accepting STDIN implicitly when using the `lint:twig` command, use `lint:twig -` (append a dash) instead to make it explicit.
 
 4.3.0
 -----

src/Symfony/Bridge/Twig/Command/LintCommand.php

@@ -50,7 +50,7 @@ class LintCommand extends Command
         $this
             ->setDescription('Lints a template and outputs encountered errors')
             ->addOption('format', null, InputOption::VALUE_REQUIRED, 'The output format', 'txt')
-            ->addArgument('filename', InputArgument::IS_ARRAY)
+            ->addArgument('filename', InputArgument::IS_ARRAY, 'A file, a directory or "-" for reading from STDIN')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command lints a template and outputs to STDOUT
 the first encountered syntax error.
@@ -77,15 +77,15 @@ EOF
     {
         $io = new SymfonyStyle($input, $output);
         $filenames = $input->getArgument('filename');
+        $hasStdin = '-' === ($filenames[0] ?? '');
 
-        if (0 === \count($filenames)) {
+        if ($hasStdin || 0 === \count($filenames)) {
-            if (0 === ftell(STDIN)) {
+            if ($hasStdin || 0 === ftell(STDIN)) { // remove 0 === ftell(STDIN) check in 5.0
-                $template = '';
+                if (!$hasStdin) {
-                while (!feof(STDIN)) {
+                    @trigger_error('Calling to the "lint:twig" command providing pipe file content to STDIN without passing the dash symbol "-" explicitly is deprecated since Symfony 4.4.', E_USER_DEPRECATED);
-                    $template .= fread(STDIN, 1024);
                 }
 
-                return $this->display($input, $output, $io, [$this->validate($template, uniqid('sf_', true))]);
+                return $this->display($input, $output, $io, [$this->validate($this->getStdin(), uniqid('sf_', true))]);
             }
 
             $loader = $this->twig->getLoader();
@@ -107,6 +107,16 @@ EOF
         return $this->display($input, $output, $io, $filesInfo);
     }
 
+    private function getStdin(): string
+    {
+        $template = '';
+        while (!feof(STDIN)) {
+            $template .= fread(STDIN, 1024);
+        }
+
+        return $template;
+    }
+
     private function getFilesInfo(array $filenames)
     {
         $filesInfo = [];

src/Symfony/Component/Translation/CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 -----
 
  * deprecated support for using `null` as the locale in `Translator`
+ * deprecated accepting STDIN implicitly when using the `lint:xliff` command, use `lint:xliff -` (append a dash) instead to make it explicit.
 
 4.3.0
 -----

src/Symfony/Component/Translation/Command/XliffLintCommand.php

@@ -53,7 +53,7 @@ class XliffLintCommand extends Command
     {
         $this
             ->setDescription('Lints a XLIFF file and outputs encountered errors')
-            ->addArgument('filename', InputArgument::IS_ARRAY, 'A file or a directory or STDIN')
+            ->addArgument('filename', InputArgument::IS_ARRAY, 'A file, a directory or "-" for reading from STDIN')
             ->addOption('format', null, InputOption::VALUE_REQUIRED, 'The output format', 'txt')
             ->setHelp(<<<EOF
 The <info>%command.name%</info> command lints a XLIFF file and outputs to STDOUT
@@ -83,13 +83,18 @@ EOF
         $filenames = (array) $input->getArgument('filename');
         $this->format = $input->getOption('format');
         $this->displayCorrectFiles = $output->isVerbose();
+        $hasStdin = '-' === ($filenames[0] ?? '');
 
-        if (0 === \count($filenames)) {
+        if ($hasStdin || 0 === \count($filenames)) {
-            if (!$stdin = $this->getStdin()) {
+            if (!$hasStdin && 0 !== ftell(STDIN)) { // remove 0 !== ftell(STDIN) check in 5.0
                 throw new RuntimeException('Please provide a filename or pipe file content to STDIN.');
             }
 
-            return $this->display($io, [$this->validate($stdin)]);
+            if (!$hasStdin) {
+                @trigger_error('Calling to the "lint:xliff" command providing pipe file content to STDIN without passing the dash symbol "-" explicitly is deprecated since Symfony 4.4.', E_USER_DEPRECATED);
+            }
+
+            return $this->display($io, [$this->validate($this->getStdin())]);
         }
 
         $filesInfo = [];
@@ -223,18 +228,14 @@ EOF
         }
     }
 
-    private function getStdin(): ?string
+    private function getStdin(): string
     {
-        if (0 !== ftell(STDIN)) {
+        $xliff = '';
-            return null;
-        }
-
-        $inputs = '';
         while (!feof(STDIN)) {
-            $inputs .= fread(STDIN, 1024);
+            $xliff .= fread(STDIN, 1024);
         }
 
-        return $inputs;
+        return $xliff;
     }
 
     private function getDirectoryIterator(string $directory)

src/Symfony/Component/Yaml/CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 -----
 
  * Added support to dump `null` as `~` by using the `Yaml::DUMP_NULL_AS_TILDE` flag.
+ * deprecated accepting STDIN implicitly when using the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit.
 
 4.3.0
 -----

src/Symfony/Component/Yaml/Command/LintCommand.php

@@ -54,7 +54,7 @@ class LintCommand extends Command
     {
         $this
             ->setDescription('Lints a file and outputs encountered errors')
-            ->addArgument('filename', InputArgument::IS_ARRAY, 'A file or a directory or STDIN')
+            ->addArgument('filename', InputArgument::IS_ARRAY, 'A file, a directory or "-" for reading from STDIN')
             ->addOption('format', null, InputOption::VALUE_REQUIRED, 'The output format', 'txt')
             ->addOption('parse-tags', null, InputOption::VALUE_NONE, 'Parse custom tags')
             ->setHelp(<<<EOF
@@ -86,13 +86,18 @@ EOF
         $this->format = $input->getOption('format');
         $this->displayCorrectFiles = $output->isVerbose();
         $flags = $input->getOption('parse-tags') ? Yaml::PARSE_CUSTOM_TAGS : 0;
+        $hasStdin = '-' === ($filenames[0] ?? '');
 
-        if (0 === \count($filenames)) {
+        if ($hasStdin || 0 === \count($filenames)) {
-            if (!$stdin = $this->getStdin()) {
+            if (!$hasStdin && 0 !== ftell(STDIN)) { // remove 0 !== ftell(STDIN) check in 5.0
                 throw new RuntimeException('Please provide a filename or pipe file content to STDIN.');
             }
 
-            return $this->display($io, [$this->validate($stdin, $flags)]);
+            if (!$hasStdin) {
+                @trigger_error('Calling to the "lint:yaml" command providing pipe file content to STDIN without passing the dash symbol "-" explicitly is deprecated since Symfony 4.4.', E_USER_DEPRECATED);
+            }
+
+            return $this->display($io, [$this->validate($this->getStdin(), $flags)]);
         }
 
         $filesInfo = [];
@@ -199,18 +204,14 @@ EOF
         }
     }
 
-    private function getStdin(): ?string
+    private function getStdin(): string
     {
-        if (0 !== ftell(STDIN)) {
+        $yaml = '';
-            return null;
-        }
-
-        $inputs = '';
         while (!feof(STDIN)) {
-            $inputs .= fread(STDIN, 1024);
+            $yaml .= fread(STDIN, 1024);
         }
 
-        return $inputs;
+        return $yaml;
     }
 
     private function getParser()