Add semver tasks.

src/Task/Semver.php

@@ -0,0 +1,141 @@
+<?php
+namespace Robo\Task;
+
+use Robo\Output;
+use Robo\Task\Shared\TaskException;
+use Robo\Task\Shared\TaskInterface;
+use Robo\Result;
+
+/**
+ * Tasks to execute all semver commands.
+ *
+ * @package Robo\Task
+ */
+trait Semver {
+
+
+	protected function taskSemverInitialize($pathToSemver = null)
+	{
+		$semver = new TaskSemver($pathToSemver);
+		return $semver->initialize();
+	}
+
+	protected function taskSemverIncrement($arg = 'patch', $pathToSemver = null)
+	{
+		$semver = new TaskSemver($pathToSemver);
+		return $semver->increment($arg);
+	}
+
+	protected function taskSemverPrerelease($arg, $pathToSemver = null)
+	{
+		$semver = new TaskSemver($pathToSemver);
+		return $semver->prerelease($arg);
+	}
+
+	protected function taskSemverMetadata($arg, $pathToSemver = null)
+	{
+		$semver = new TaskSemver($pathToSemver);
+		return $semver->metadata($arg);
+	}
+
+	protected function taskSemverFormat($arg, $pathToSemver = null)
+	{
+		$semver = new TaskSemver($pathToSemver);
+		return $semver->format($arg);
+	}
+
+	protected function taskSemverTag($pathToSemver = null)
+	{
+		$semver = new TaskSemver($pathToSemver);
+		return $semver->tag();
+	}
+}
+
+/**
+ * Semver wrapper.
+ *
+ * ``` php
+ * <?php
+ * $this->taskSemverTag()->run()->getMessage();
+ *
+ * $this->taskSemverIncrement('patch')->run();
+ *
+ * if ($this->taskSemverInitialize('/path/to/semver')->run()->wasSuccessful()) {
+ *  $this->say('Semver initialized');
+ * }
+ * ?>
+ * ```
+ */
+class TaskSemver implements TaskInterface {
+
+	use \Robo\Output;
+
+	protected $command;
+
+	private $commands = array(
+		'initialize' => false,
+		'increment' => ['major', 'minor', 'patch'],
+		'prerelease' => true,
+		'metadata' => true,
+		'format' => true,
+		'tag' => false,
+	);
+
+	private $outputs = array(
+		'initialize' => 'Initializing semver.',
+		'increment' => 'Incrementing the %s version',
+		'prerelease' => 'Setting pre-release version suffix to %s',
+		'metadata' => 'Setting metadata version suffix to %s',
+	);
+
+	public function __construct($pathToSemver = null)
+	{
+		if ($pathToSemver) {
+			$this->command = $pathToSemver;
+		} else {
+			$this->command = exec('which semver');
+			if (empty($this->command)) {
+				throw new TaskException();
+			}
+		}
+	}
+
+	public function __call($command, $args = null)
+	{
+		if (!array_key_exists($command, $this->commands)) {
+			throw new TaskException('Invalid command.');
+		}
+
+		if (empty($args) && !empty($this->commands[$command])) {
+			throw new TaskException('Missing required argument.');
+		}
+
+		$arg = current($args);
+
+		if (is_array($this->commands[$command]) && !in_array($arg, $this->commands[$command])) {
+			throw new TaskException('Invalid argument.');
+		}
+
+		if (array_key_exists($command, $this->outputs)) {
+			$message = $this->outputs[$command];
+			if (!empty($arg)) {
+				$message = sprintf($message, $arg);
+			}
+			$this->printTaskInfo($message);
+		}
+
+		$this->command .= ' ' . $command;
+		if (!empty($arg)) {
+			$this->command .= ' ' . $arg;
+		}
+
+		return $this;
+	}
+
+	public function run()
+	{
+		$line = exec($this->command, $output, $code);
+		return new Result($this, $code, $line);
+	}
+
+}