system/Database/MigrationRunner.php
public function findMigrations(): array
	{
		$migrations = [];

		// If $this->path contains a valid directory use it.
		if (! empty($this->path))
		{
			helper('filesystem');
			$dir   = rtrim($this->path, DIRECTORY_SEPARATOR) . '/';
			$files = get_filenames($dir, true);
		}
		// Otherwise use FileLocator to search files in the subdirectory of the namespace
		else
		{
			$locator = Services::locator(true);
			$files   = $locator->listNamespaceFiles($this->namespace, '/Database/Migrations/');
		}

		// Load all *_*.php files in the migrations path
		// We can't use glob if we want it to be testable....
		foreach ($files as $file)
		{
			if (substr($file, -4) !== '.php')
			{
				continue;
			}

			// Remove the extension
			$name = basename($file, '.php');

			// Filter out non-migration files
			if (preg_match($this->regex, $name))
			{
				// Create migration object using stdClass
				$migration = new \stdClass();

				// Get migration version number
				$migration->version = $this->getMigrationNumber($name);
				$migration->name    = $this->getMigrationName($name);
				$migration->path    = ! empty($this->path) && strpos($file, $this->path) !== 0
					? $this->path . $file
					: $file;

				// Add to migrations[version]
				$migrations[$migration->version] = $migration;
			}
		}

		ksort($migrations);

		return $migrations;
	}
public function findMigrations(): array
	{
		$migrations = [];

		// If $this->path contains a valid directory use it.
		if (! empty($this->path))
		{
			helper('filesystem');
			$dir   = rtrim($this->path, DIRECTORY_SEPARATOR) . '/';
			$files = get_filenames($dir, true);
		}
		// Otherwise use FileLocator to search files in the subdirectory of the namespace
		else
		{
			$locator = Services::locator(true);
			$files   = $locator->listNamespaceFiles($this->namespace, '/Database/Migrations/');
		}

		// Load all *_*.php files in the migrations path
		// We can't use glob if we want it to be testable....
		foreach ($files as $file)
		{
			if (substr($file, -4) !== '.php')
			{
				continue;
			}

			// Remove the extension
			$name = basename($file, '.php');

			// Filter out non-migration files
			if (preg_match($this->regex, $name))
			{
				// Create migration object using stdClass
				$migration = new \stdClass();

				// Get migration version number
				$migration->version = $this->getMigrationNumber($name);
				$migration->name    = $this->getMigrationName($name);
				$migration->path    = ! empty($this->path) && strpos($file, $this->path) !== 0
					? $this->path . $file
					: $file;

				// Add to migrations[version]
				$migrations[$migration->version] = $migration;
			}
		}

		ksort($migrations);

		return $migrations;
	}
Retrieves list of available migration scripts for one namespace

@return array    list of migrations as $version for one namespace