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<?php |
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namespace WebPConvert\Helpers; |
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use WebPConvert\Helpers\FileExists; |
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/** |
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* Discover multiple paths of a binary |
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* |
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* @package WebPConvert |
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* @author Bjørn Rosell <[email protected]> |
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* @since Class available since Release 2.3.0 |
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*/ |
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class BinaryDiscovery |
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{ |
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// Common system paths |
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private static $commonSystemPaths = [ |
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'/usr/bin', |
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'/usr/local/bin', |
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'/usr/gnu/bin', |
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'/usr/syno/bin' |
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]; |
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/** |
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* Discover binaries by looking in common system paths. |
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* |
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* We try a small set of common system paths, such as "/usr/bin". |
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* |
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* @param string $binary the binary to look for (ie "cwebp") |
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* |
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* @return array binaries found in common system locations |
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*/ |
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public static function discoverInCommonSystemPaths($binary) |
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{ |
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$binaries = []; |
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foreach (self::$commonSystemPaths as $dir) { |
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// PS: FileExists might throw if exec() is unavailable. We let it. |
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// - this class assumes exec is available |
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if (FileExists::fileExistsTryHarder($dir . '/' . $binary)) { |
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$binaries[] = $dir . '/' . $binary; |
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} |
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} |
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return $binaries; |
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} |
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/** |
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* Discover installed binaries using ie "whereis -b cwebp" |
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* |
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* @return array Array of cwebp paths discovered (possibly empty) |
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*/ |
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private static function discoverBinariesUsingWhereIs($binary) |
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{ |
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// This method was added due to #226. |
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exec('whereis -b ' . $binary, $output, $returnCode); |
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if (($returnCode == 0) && (isset($output[0]))) { |
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$result = $output[0]; |
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// Ie: "cwebp: /usr/bin/cwebp /usr/local/bin/cwebp" |
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if (preg_match('#^' . $binary . ':\s(.*)$#', $result, $matches)) { |
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return explode(' ', $matches[1]); |
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} |
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} |
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return []; |
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} |
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/** |
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* Discover installed binaries using "which -a cwebp" |
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* |
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* @param string $binary the binary to look for (ie "cwebp") |
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* |
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* @return array Array of paths discovered (possibly empty) |
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*/ |
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private static function discoverBinariesUsingWhich($binary) |
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{ |
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// As suggested by @cantoute here: |
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// https://wordpress.org/support/topic/sh-1-usr-local-bin-cwebp-not-found/ |
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exec('which -a ' . $binary, $output, $returnCode); |
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if ($returnCode == 0) { |
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return $output; |
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} |
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return []; |
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} |
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/** |
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* Discover binaries using "which -a" or, if that fails "whereis -b" |
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* |
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* These commands only searces within $PATH. So it only finds installed binaries (which is good, |
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* as it would be unsafe to deal with binaries found scattered around) |
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* |
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* @param string $binary the binary to look for (ie "cwebp") |
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* |
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* @return array binaries found in common system locations |
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*/ |
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public static function discoverInstalledBinaries($binary) |
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{ |
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$paths = self::discoverBinariesUsingWhich($binary); |
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if (count($paths) > 0) { |
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return $paths; |
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} |
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$paths = self::discoverBinariesUsingWhereIs($binary); |
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if (count($paths) > 0) { |
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return $paths; |
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} |
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return []; |
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} |
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} |
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rosell-dk /
webp-convert
