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Commited391df

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Don't assume that file binary exists on *nix OS
Certain lightweight distributions such as Alpine Linux (popular for smaller Docker images) do not include it by default.
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‎src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php‎

Lines changed: 15 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -43,7 +43,21 @@ public function __construct($cmd = 'file -b --mime %s 2>/dev/null')
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*/
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publicstaticfunctionisSupported()
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{
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return'\\' !==DIRECTORY_SEPARATOR &&function_exists('passthru') &&function_exists('escapeshellarg');
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static$supported;
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if (isset($supported)) {
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return$supported;
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}
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if ('\\' ===DIRECTORY_SEPARATOR || !function_exists('passthru') || !function_exists('escapeshellarg')) {
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return$supported =false;
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}
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ob_start();
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passthru('command -v file',$exitStatus);
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$binPath =trim(ob_get_clean());
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return$supported =0 ===$exitStatus &&'' !==$binPath;
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}
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/**

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