Error with installing Drush on via Ansible

Question

When installing Drush, with the following task

action: command pear install drush/drush creates=/usr/bin/drush tags: drush

I get the dollowing error:

TASK: [Drush | Install drush] ************************************************* failed: [default] => {"changed": true, "cmd": ["pear", "install", "drush/drush"], "delta": "0:00:01.318926", "end": "2014-02-14 09:25:46.666768", "item": "", "rc": 255, "start": "2014-02-14 09:25:45.347842"} stderr: PHP Notice: Array to string conversion in /usr/share/php/PEAR/REST/13.php on line 80 PHP Warning: Invalid argument supplied for foreach() in /usr/share/php/PEAR/REST/13.php on line 84 PHP Fatal error: Cannot use string offset as an array in /usr/share/php/PEAR/REST/10.php on line 263 stdout: Notice: Array to string conversion in PEAR/REST/13.php on line 80

Warning: Invalid argument supplied for foreach() in PEAR/REST/13.php on line 84

FATAL: all hosts have already failed -- aborting

Answer 1

I ran across this question while researching the same error using the Vagrant LAMP Ansible Drupal (VLAD) project. I also happened to notice that the PEAR installation instructions have just recently been removed (2 days ago) from Drush. It doesn't say explicitly that the pear channel has been disabled, but it does indicate that it might be a good time to consider switching to Composer or manual install of Drush.