ParallelExecutor::areRunning() - Code Metrics - Inspection of "Properly handle input options (#1793)" - deployphp/deployer - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( a1c7ac...c27aa0 )

by Anton

created 2019-01-17 05:55 UTC

ParallelExecutor::areRunning() A

↳ Parent: ParallelExecutor

Complexity

Conditions	3
Paths	3

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
nc	3
nop	1
dl	0
loc	10
ccs	5
cts	5
cp	1
crap	3
rs	9.9332
c	0
b	0
f	0

<?php declare(strict_types=1);
/* (c) Anton Medvedev <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Deployer\Executor;

use Deployer\Console\Application;
use Deployer\Console\Input\Argument;
use Deployer\Console\Input\Option;
use Deployer\Console\Output\Informer;
use Deployer\Console\Output\VerbosityString;
use Deployer\Exception\Exception;
use Deployer\Exception\GracefulShutdownException;
use Deployer\Host\Host;
use Deployer\Host\Localhost;
use Deployer\Host\Storage;
use Deployer\Task\Context;
use Deployer\Task\Task;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Process\Process;

class ParallelExecutor implements ExecutorInterface
{
    /**
     * @var InputInterface
     */
    private $input;

    /**
     * @var OutputInterface
     */
    private $output;

    /**
     * @var Informer
     */
    private $informer;

    /**
     * @var Application
     */
    private $console;

    public function __construct(
        InputInterface $input,
        OutputInterface $output,
        Informer $informer,
        Application $console
    ) {
        $this->input = $input;
        $this->output = $output;
        $this->informer = $informer;
        $this->console = $console;
    }

    /**
     * {@inheritdoc}
     */
    public function run(array $tasks, array $hosts)
    {
        $localhost = new Localhost();
        $limit = (int) $this->input->getOption('limit') ?: count($hosts);

        // We need contexts here for usage inside `on` function. Pass input/output to callback of it.
        // This allows to use code like this in parallel mode:
        //
        //     host('prod')
        //         ->set('branch', function () {
        //             return input()->getOption('branch') ?: 'production';
        //     })
        //
        // Otherwise `input()` wont be accessible (i.e. null)
        //
        Context::push(new Context($localhost, $this->input, $this->output));
        {
            Storage::persist($hosts);
        }
        Context::pop();

        foreach ($tasks as $task) {
            $success = true;
            $this->informer->startTask($task);

            if ($task->isLocal()) {
                Storage::load($hosts);
                {
                    $task->run(new Context($localhost, $this->input, $this->output));
                }
                Storage::flush($hosts);
            } else {
                foreach (array_chunk($hosts, $limit) as $chunk) {
                    $exitCode = $this->runTask($chunk, $task);

                    switch ($exitCode) {
                        case 1:
                            throw new GracefulShutdownException();
                        case 2:
                            $success = false;
                            break;
                        case 255:
                            throw new Exception();
                    }
                }
            }

            if ($success) {
                $this->informer->endTask($task);
            } else {
                $this->informer->taskError();
            }
        }
    }

    /**
     * Run task on hosts.
     *
     * @param Host[] $hosts
     */
    private function runTask(array $hosts, Task $task): int
    {
        $processes = [];

        foreach ($hosts as $host) {
            if ($task->shouldBePerformed($host)) {
                $processes[$host->getHostname()] = $this->getProcess($host, $task);
                if ($task->isOnce()) {
                    $task->setHasRun();
                }
            }
        }

        $callback = function (string $type, string $host, string $output) {
            $output = rtrim($output);
            if (strlen($output) !== 0) {
                $this->output->writeln($output);
            }
        };

        $this->startProcesses($processes);

        while ($this->areRunning($processes)) {
            $this->gatherOutput($processes, $callback);
            usleep(1000);
        }
        $this->gatherOutput($processes, $callback);

        return $this->gatherExitCodes($processes);
    }

    /**
     * Get process for task on host.
     */
    protected function getProcess(Host $host, Task $task): Process
    {
        $dep = PHP_BINARY.' '.DEPLOYER_BIN;
        $options = $this->generateOptions();
        $arguments = $this->generateArguments();
        $hostname = $host->getHostname();
        $taskName = $task->getName();
        $configFile = $host->get('host_config_storage');
        $value = $this->input->getOption('file');
        $file = $value ? "--file='$value'" : '';

        if ($this->output->isDecorated()) {
            $options .= ' --ansi';
        }

        $command = "$dep $file worker $arguments $options --hostname $hostname --task $taskName --config-file $configFile";
        $process = new Process($command);

        if (!defined('DEPLOYER_PARALLEL_PTY')) {
            $process->setPty(true);
        }

        return $process;
    }

    /**
     * Start all of the processes.
     *
     * @param Process[] $processes
     *
     * @return void
     */
    protected function startProcesses(array $processes)
    {
        foreach ($processes as $process) {
            $process->start();
        }
    }

    /**
     * Determine if any of the processes are running.
     *
     * @param Process[] $processes
     */
    protected function areRunning(array $processes): bool
    {
        foreach ($processes as $process) {
            if ($process->isRunning()) {
                return true;
            }
        }

        return false;
    }

    /**
     * Gather the output from all of the processes.
     *
     * @param Process[] $processes
     *
     * @return void
     */
    protected function gatherOutput(array $processes, callable $callback)
    {
        foreach ($processes as $host => $process) {
            $output = $process->getIncrementalOutput();
            if (strlen($output) !== 0) {
                $callback(Process::OUT, $host, $output);
            }

            $errorOutput = $process->getIncrementalErrorOutput();
            if (strlen($errorOutput) !== 0) {
                $callback(Process::ERR, $host, $errorOutput);
            }
        }
    }

    /**
     * Gather the cumulative exit code for the processes.
     *
     * @param Process[] $processes
     */
    protected function gatherExitCodes(array $processes): int
    {
        foreach ($processes as $process) {
            if ($process->getExitCode() > 0) {
                return $process->getExitCode();
            }
        }

        return 0;
    }

    /**
     * Generate options and arguments string.
     */
    private function generateOptions(): string
    {
        /** @var string[] $inputs */
        $inputs = [
            (string) (new VerbosityString($this->output)),
        ];

        $userDefinition = $this->console->getUserDefinition();
        // Get user arguments
        foreach ($userDefinition->getArguments() as $argument) {
            $inputs[] = Argument::toString($this->input, $argument);
        }

        // Get user options
        foreach ($userDefinition->getOptions() as $option) {
            $inputs[] = Option::toString($this->input, $option);
        }

        return implode(' ', array_filter($inputs, static function (string $item): bool {
            return $item !== '';
        }));
    }

    private function generateArguments(): string
    {
        $arguments = '';

        if ($this->input->hasArgument('stage')) {
            // Some people rely on stage argument, so pass it to worker too.
            $arguments .= $this->input->getArgument('stage');
        }

        return $arguments;
    }
}


1		<?php declare(strict_types=1);
2		/* (c) Anton Medvedev <[email protected]>
3		*
4		* For the full copyright and license information, please view the LICENSE
5		* file that was distributed with this source code.
6		*/
7
8		namespace Deployer\Executor;
9
10		use Deployer\Console\Application;
11		use Deployer\Console\Input\Argument;
12		use Deployer\Console\Input\Option;
13		use Deployer\Console\Output\Informer;
14		use Deployer\Console\Output\VerbosityString;
15		use Deployer\Exception\Exception;
16		use Deployer\Exception\GracefulShutdownException;
17		use Deployer\Host\Host;
18		use Deployer\Host\Localhost;
19		use Deployer\Host\Storage;
20		use Deployer\Task\Context;
21		use Deployer\Task\Task;
22		use Symfony\Component\Console\Input\InputInterface;
23		use Symfony\Component\Console\Output\OutputInterface;
24		use Symfony\Component\Process\Process;
25
26		class ParallelExecutor implements ExecutorInterface
27		{
28		/**
29		* @var InputInterface
30		*/
31		private $input;
32
33		/**
34		* @var OutputInterface
35		*/
36		private $output;
37
38		/**
39		* @var Informer
40		*/
41		private $informer;
42
43		/**
44		* @var Application
45		*/
46		private $console;
47
48	5	public function __construct(
49		InputInterface $input,
50		OutputInterface $output,
51		Informer $informer,
52		Application $console
53		) {
54	5	$this->input = $input;
55	5	$this->output = $output;
56	5	$this->informer = $informer;
57	5	$this->console = $console;
58	5	}
59
60		/**
61		* {@inheritdoc}
62		*/
63	5	public function run(array $tasks, array $hosts)
64		{
65	5	$localhost = new Localhost();
66	5	$limit = (int) $this->input->getOption('limit') ?: count($hosts);
67
68		// We need contexts here for usage inside `on` function. Pass input/output to callback of it.
69		// This allows to use code like this in parallel mode:
70		//
71		// host('prod')
72		// ->set('branch', function () {
73		// return input()->getOption('branch') ?: 'production';
74		// })
75		//
76		// Otherwise `input()` wont be accessible (i.e. null)
77		//
78	5	Context::push(new Context($localhost, $this->input, $this->output));
79		{
80	5	Storage::persist($hosts);
81		}
82	5	Context::pop();
83
84	5	foreach ($tasks as $task) {
85	5	$success = true;
86	5	$this->informer->startTask($task);
87
88	5	if ($task->isLocal()) {
89	2	Storage::load($hosts);
90		{
91	2	$task->run(new Context($localhost, $this->input, $this->output));
92		}
93	2	Storage::flush($hosts);
94		} else {
95	5	foreach (array_chunk($hosts, $limit) as $chunk) {
96	5	$exitCode = $this->runTask($chunk, $task);
97
98		switch ($exitCode) {
99	5	case 1:
100		throw new GracefulShutdownException();
101	5	case 2:
102		$success = false;
103		break;
104	5	case 255:
105	5	throw new Exception();
106		}
107		}
108		}
109
110	5	if ($success) {
111	5	$this->informer->endTask($task);
112		} else {
113	5	$this->informer->taskError();
114		}
115		}
116	5	}
117
118		/**
119		* Run task on hosts.
120		*
121		* @param Host[] $hosts
122		*/
123	5	private function runTask(array $hosts, Task $task): int
124		{
125	5	$processes = [];
126
127	5	foreach ($hosts as $host) {
128	5	if ($task->shouldBePerformed($host)) {
129	5	$processes[$host->getHostname()] = $this->getProcess($host, $task);
130	5	if ($task->isOnce()) {
131	5	$task->setHasRun();
132		}
133		}
134		}
135
136	5	$callback = function (string $type, string $host, string $output) {
137	5	$output = rtrim($output);
138	5	if (strlen($output) !== 0) {
139	5	$this->output->writeln($output);
140		}
141	5	};
142
143	5	$this->startProcesses($processes);
144
145	5	while ($this->areRunning($processes)) {
146	5	$this->gatherOutput($processes, $callback);
147	5	usleep(1000);
148		}
149	5	$this->gatherOutput($processes, $callback);
150
151	5	return $this->gatherExitCodes($processes);
152		}
153
154		/**
155		* Get process for task on host.
156		*/
157	5	protected function getProcess(Host $host, Task $task): Process
158		{
159	5	$dep = PHP_BINARY.' '.DEPLOYER_BIN;
160	5	$options = $this->generateOptions();
161	5	$arguments = $this->generateArguments();
162	5	$hostname = $host->getHostname();
163	5	$taskName = $task->getName();
164	5	$configFile = $host->get('host_config_storage');
165	5	$value = $this->input->getOption('file');
166	5	$file = $value ? "--file='$value'" : '';
167
168	5	if ($this->output->isDecorated()) {
169		$options .= ' --ansi';
170		}
171
172	5	$command = "$dep $file worker $arguments $options --hostname $hostname --task $taskName --config-file $configFile";
173	5	$process = new Process($command);
174
175	5	if (!defined('DEPLOYER_PARALLEL_PTY')) {
176		$process->setPty(true);
177		}
178
179	5	return $process;
180		}
181
182		/**
183		* Start all of the processes.
184		*
185		* @param Process[] $processes
186		*
187		* @return void
188		*/
189	5	protected function startProcesses(array $processes)
190		{
191	5	foreach ($processes as $process) {
192	5	$process->start();
193		}
194	5	}
195
196		/**
197		* Determine if any of the processes are running.
198		*
199		* @param Process[] $processes
200		*/
201	5	protected function areRunning(array $processes): bool
202		{
203	5	foreach ($processes as $process) {
204	5	if ($process->isRunning()) {
205	5	return true;
206		}
207		}
208
209	5	return false;
210		}
211
212		/**
213		* Gather the output from all of the processes.
214		*
215		* @param Process[] $processes
216		*
217		* @return void
218		*/
219	5	protected function gatherOutput(array $processes, callable $callback)
220		{
221	5	foreach ($processes as $host => $process) {
222	5	$output = $process->getIncrementalOutput();
223	5	if (strlen($output) !== 0) {
224	5	$callback(Process::OUT, $host, $output);
225		}
226
227	5	$errorOutput = $process->getIncrementalErrorOutput();
228	5	if (strlen($errorOutput) !== 0) {
229	5	$callback(Process::ERR, $host, $errorOutput);
230		}
231		}
232	5	}
233
234		/**
235		* Gather the cumulative exit code for the processes.
236		*
237		* @param Process[] $processes
238		*/
239	5	protected function gatherExitCodes(array $processes): int
240		{
241	5	foreach ($processes as $process) {
242	5	if ($process->getExitCode() > 0) {
243	5	return $process->getExitCode();
244		}
245		}
246
247	5	return 0;
248		}
249
250		/**
251		* Generate options and arguments string.
252		*/
253	5	private function generateOptions(): string
254		{
255		/** @var string[] $inputs */
256		$inputs = [
257	5	(string) (new VerbosityString($this->output)),
258		];
259
260	5	$userDefinition = $this->console->getUserDefinition();
261		// Get user arguments
262	5	foreach ($userDefinition->getArguments() as $argument) {
263		$inputs[] = Argument::toString($this->input, $argument);
264		}
265
266		// Get user options
267	5	foreach ($userDefinition->getOptions() as $option) {
268	4	$inputs[] = Option::toString($this->input, $option);
269		}
270
271	5	return implode(' ', array_filter($inputs, static function (string $item): bool {
272	5	return $item !== '';
273	5	}));
274		}
275
276	5	private function generateArguments(): string
277		{
278	5	$arguments = '';
279
280	5	if ($this->input->hasArgument('stage')) {
281		// Some people rely on stage argument, so pass it to worker too.
282	5	$arguments .= $this->input->getArgument('stage');
283		}
284
285	5	return $arguments;
286		}
287		}
288

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ParallelExecutor::areRunning() A

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