protected function getDrushExecutable()
    {
        if (isset($this->executable)) {
            return $this->executable;
        }

        if ($this->config->has('local.drush_executable')) {
            return $this->executable = $this->config->get('local.drush_executable');
        }

        // Find a locally installed Drush instance: first check the Composer
        // 'vendor' directory.
        $projectRoot = $this->localProject->getProjectRoot();
        $localDir = $projectRoot ?: getcwd();
        $drushLocal = $localDir . '/vendor/bin/drush';
        if (is_executable($drushLocal)) {
            return $this->executable = $drushLocal;
        }

        // Check the local dependencies directory (created via 'platform
        // build').
        $drushDep = $localDir . '/' . $this->config->get('local.dependencies_dir') . '/php/vendor/bin/drush';
        if (is_executable($drushDep)) {
            return $this->executable = $drushDep;
        }

        // Use the global Drush, if there is one installed.
        if ($this->shellHelper->commandExists('drush')) {
            return $this->executable = $this->shellHelper->resolveCommand('drush');
        }

        // Fall back to the Drush that may be installed within the CLI.
        $drushCli = CLI_ROOT . '/vendor/bin/drush';
        if (is_executable($drushCli)) {
            return $this->executable = $drushCli;
        }

        return $this->executable = 'drush';
    }
protected function getDrushExecutable()
    {
        if (isset($this->executable)) {
            return $this->executable;
        }

        if ($this->config->has('local.drush_executable')) {
            return $this->executable = $this->config->get('local.drush_executable');
        }

        // Find a locally installed Drush instance: first check the Composer
        // 'vendor' directory.
        $projectRoot = $this->localProject->getProjectRoot();
        $localDir = $projectRoot ?: getcwd();
        $drushLocal = $localDir . '/vendor/bin/drush';
        if (is_executable($drushLocal)) {
            return $this->executable = $drushLocal;
        }

        // Check the local dependencies directory (created via 'platform
        // build').
        $drushDep = $localDir . '/' . $this->config->get('local.dependencies_dir') . '/php/vendor/bin/drush';
        if (is_executable($drushDep)) {
            return $this->executable = $drushDep;
        }

        // Use the global Drush, if there is one installed.
        if ($this->shellHelper->commandExists('drush')) {
            return $this->executable = $this->shellHelper->resolveCommand('drush');
        }

        // Fall back to the Drush that may be installed within the CLI.
        $drushCli = CLI_ROOT . '/vendor/bin/drush';
        if (is_executable($drushCli)) {
            return $this->executable = $drushCli;
        }

        return $this->executable = 'drush';
    }
protected function getDrushExecutable ( ) { if ( isset ( $ this -> executable ) ) { return $ this -> executable ; } if ( $ this -> config -> has ( 'local.drush_executable' ) ) { return $ this -> executable = $ this -> config -> get ( 'local.drush_executable' ) ; } // Find a locally installed Drush instance: first check the Composer // 'vendor' directory. $ projectRoot = $ this -> localProject -> getProjectRoot ( ) ; $ localDir = $ projectRoot ? : getcwd ( ) ; $ drushLocal = $ localDir . '/vendor/bin/drush' ; if ( is_executable ( $ drushLocal ) ) { return $ this -> executable = $ drushLocal ; } // Check the local dependencies directory (created via 'platform // build'). $ drushDep = $ localDir . '/' . $ this -> config -> get ( 'local.dependencies_dir' ) . '/php/vendor/bin/drush' ; if ( is_executable ( $ drushDep ) ) { return $ this -> executable = $ drushDep ; } // Use the global Drush, if there is one installed. if ( $ this -> shellHelper -> commandExists ( 'drush' ) ) { return $ this -> executable = $ this -> shellHelper -> resolveCommand ( 'drush' ) ; } // Fall back to the Drush that may be installed within the CLI. $ drushCli = CLI_ROOT . '/vendor/bin/drush' ; if ( is_executable ( $ drushCli ) ) { return $ this -> executable = $ drushCli ; } return $ this -> executable = 'drush' ; }
Get the full path to the Drush executable.

@return string
The absolute path to the executable, or 'drush' if the path is not
known.
Get the full path to the Drush executable .