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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Env |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Env\Traits; |
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use Phossa2\Env\Message\Message; |
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use Phossa2\Env\Exception\LogicException; |
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/** |
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* Collections of LOAD related methods |
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* |
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* @package Phossa2\Env |
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* @author Hong Zhang <[email protected]> |
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* @version 2.0.2 |
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* @since 2.0.1 added |
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* @since 2.0.2 added support for ${0} etc. |
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* @since 2.0.3 changed ${0} to ${BASH_SOURCE} |
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*/ |
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trait LoadEnvTrait |
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{ |
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/** |
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* marker for sourcing another env file |
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* |
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* @var string |
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* @access private |
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*/ |
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private $source_marker = '__SOURCING_FILE__'; |
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/** |
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* Load & parse, return the key/value pairs |
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* |
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* @param string $path |
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* @return array |
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* @throws LogicException if $path not readable or failure |
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* @access protected |
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*/ |
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protected function loadEnv(/*# string */ $path)/*# : array */ |
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{ |
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// read data |
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$content = $this->readContent($path); |
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// parse it |
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$pairs = $this->parseString($content); |
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// expand any '${__DIR__}' or '${__FILE__}' |
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if (false !== strpos($content, '${BASH_SOURCE') || |
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false !== strpos($content, '${__') |
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) { |
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$this->expandMagic($pairs, $path); |
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} |
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return $pairs; |
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} |
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/** |
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* Read from a file, returns the content string |
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* |
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* @param string $path |
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* @throws LogicException if $path not readable or failure |
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* @return string |
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* @access protected |
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*/ |
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protected function readContent(/*# string */ $path)/*# : string */ |
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{ |
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$str = file_get_contents($path); |
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if (is_string($str)) { |
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return $str; |
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} else { |
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throw new LogicException( |
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Message::get(Message::ENV_READ_FAIL, $path), |
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Message::ENV_READ_FAIL |
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); |
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} |
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} |
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/** |
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* Parse whole string into key/value pairs |
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* |
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* @param string $string |
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* @return array |
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* @access protected |
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*/ |
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protected function parseString(/*# string */ $string)/*# : array */ |
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{ |
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$regex = |
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'~^\s*+ |
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(?: |
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(?:([^#\s=]++) \s*+ = \s*+ |
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(?| |
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(([^"\'#\s][^#\n]*?)) | |
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(["\'])((?:\\\2|.)*?)\2 |
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)? |
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) | |
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(?: (\.|source) \s++ ([^#\n]*) ) |
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)\s*?(?:[#].*)? |
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$~mx'; |
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if (preg_match_all($regex, $string, $matched, \PREG_SET_ORDER)) { |
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return $this->clearPairs($matched); |
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} else { |
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return []; |
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} |
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} |
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/** |
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* Clean up, return key/value pairs |
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* |
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* @param array $matched |
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* @return array |
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* @access protected |
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*/ |
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protected function clearPairs(/*# array */ $matched)/*# : array */ |
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{ |
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$pairs = []; |
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foreach ($matched as $m) { |
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// source another env file |
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if (isset($m[5])) { |
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$file = trim($m[5]); |
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$pairs[$file] = $this->source_marker; |
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// value found |
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} elseif (isset($m[3])) { |
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$pairs[$m[1]] = $m[3]; |
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// no value defined |
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} else { |
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$pairs[$m[1]] = ''; |
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} |
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} |
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return $pairs; |
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} |
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/** |
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* Expand PATH/DIR/FILENAME in key & value |
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* |
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* @param array &$data |
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* @param string $path |
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* @access protected |
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* @since 2.0.2 added support for ${0} etc. |
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* @since 2.0.3 changed to ${BASH_SOURCE} |
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*/ |
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protected function expandMagic(array &$data, $path) |
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{ |
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$srch = [ |
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'${BASH_SOURCE}', '${BASH_SOURCE%/*}', '${BASH_SOURCE##*/}', |
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'${__PATH__}', '${__DIR__}', '${__FILE__}' |
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]; |
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$repl = [ |
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$path, dirname($path), basename($path), |
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$path, dirname($path), basename($path) |
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]; |
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// expand both key and value |
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foreach ($data as $key => $val) { |
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$k2 = str_replace($srch, $repl, $key); |
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$v2 = str_replace($srch, $repl, $val); |
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if ($k2 !== $key) { |
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unset($data[$key]); |
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$key = $k2; |
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} |
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$data[$key] = $v2; |
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} |
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} |
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} |
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