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<?php |
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/* this file is part of pipelines */ |
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namespace Ktomk\Pipelines\Runner; |
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use InvalidArgumentException; |
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use Ktomk\Pipelines\Cli\Args\Args; |
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use Ktomk\Pipelines\Cli\Args\OptionFilterIterator; |
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use UnexpectedValueException; |
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/** |
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* resolve environment variables against docker --env & --env-file arguments |
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* |
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* some string values in the bitbucket-pipelines.yml file might need resolution |
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* against a part of the current host environment but only if set for the |
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* container as well (--env-file, -e, --env) |
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* |
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* @package Ktomk\Pipelines\Runner |
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*/ |
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class EnvResolver |
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{ |
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/** |
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* @var array host environment (that exports) |
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*/ |
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private $environment; |
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/** |
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* @var array container environment (partial w/o bitbucket environment) |
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*/ |
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private $variables; |
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/** |
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* EnvResolver constructor. |
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* @param array|string[] $environment host environment variables (strings) |
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*/ |
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public function __construct(array $environment) |
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{ |
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$this->environment = array_filter($environment, 'is_string'); |
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} |
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public function addArguments(Args $args) |
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{ |
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$files = new OptionFilterIterator($args, 'env-file'); |
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foreach ($files->getArguments() as $file) { |
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$this->addFile($file); |
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} |
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$definitions = new OptionFilterIterator($args, array('e', 'env')); |
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foreach ($definitions->getArguments() as $definition) { |
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$this->addDefinition($definition); |
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} |
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} |
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/** |
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* add a file (--env-file option) |
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* |
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* @param string $file path to file |
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*/ |
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public function addFile($file) |
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{ |
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$lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES); |
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if (false === $lines) { |
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throw new InvalidArgumentException(sprintf( |
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"File read error: '%s'", $file |
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) |
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); |
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} |
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$definitions = preg_grep('~^(\s*#.*|\s*)$~', $lines, PREG_GREP_INVERT); |
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foreach ($definitions as $definition) { |
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$this->addDefinition($definition); |
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} |
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} |
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/** |
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* add a variable definition (-e, --env option) |
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* |
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* @param string $definition variable definition, either name only or w/ equal sign |
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*/ |
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public function addDefinition($definition) |
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{ |
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$pattern = '~^([^$={}\\x0-\\x20\\x7f-\\xff-]+)(?:=(.*))?$~'; |
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$result = preg_match($pattern, $definition, $matches); |
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if (0 === $result) { |
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throw new InvalidArgumentException(sprintf( |
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"Variable definition error: '%s'", $definition |
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)); |
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} |
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list(, $name, $value) = $matches + array(2 => null); |
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if (null === $value && isset($this->environment[$name])) { |
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$value = $this->environment[$name]; |
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} |
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$this->variables[$name] = $value; |
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} |
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/** |
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* get value of variable |
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* |
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* @param string $name of variable to obtain value from |
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* @return string|null value, null if unset |
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*/ |
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public function getValue($name) |
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{ |
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return isset($this->variables[$name]) |
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? $this->variables[$name] |
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: null; |
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} |
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/** |
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* replace variable with its content if it is a portable, Shell and |
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* Utilities variable name (see POSIX). |
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* |
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* zero-length string if the variable is undefined in the resolver |
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* context. |
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* |
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* @param $string |
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* @return string |
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*/ |
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public function resolveString($string) |
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{ |
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$pattern = '~^\$([A-Z_]+[0-9A-Z_])*$~'; |
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$result = preg_match($pattern, $string, $matches); |
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if (false === $result) { |
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throw new UnexpectedValueException('regex pattern error'); // @codeCoverageIgnore |
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} |
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if (0 === $result) { |
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return $string; |
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} |
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list(, $name) = $matches; |
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$value = $this->getValue($name); |
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return (string)$value; |
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} |
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/** |
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* resolve a string or an array of strings |
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* |
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* @param string|array $stringOrArray |
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* @return string|array |
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* @see resolveString |
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*/ |
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public function __invoke($stringOrArray) |
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{ |
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if (is_array($stringOrArray)) { |
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return array_map(array($this, 'resolveString'), $stringOrArray); |
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} |
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return $this->resolveString($stringOrArray); |
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} |
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} |
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ktomk /
pipelines
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