Actualizar Ruby con RVM en OS X 10.9 Maverick

Cocoapods me pide una versión de Ruby mayor que 2.0, pero Maverick viene por defecto con 1.9.3 así que tiré de rvm pensando que serían un par de líneas pero no, he pasado un buen rato en el proceso. Hagamos el cuento corto:

$rvm list known

y no aparece ninguna versión 2 o superior, así que:
$rvm get latest

y ahora con:
$rvm list known

tenemos:

# MRI Rubies

[ruby-]1.8.6[-p420]

[ruby-]1.8.7[-head] # security released on head

[ruby-]1.9.1[-p431]

[ruby-]1.9.2[-p330]

[ruby-]1.9.3[-p551]

[ruby-]2.0.0[-p643]

[ruby-]2.1.4

[ruby-]2.1[.5]

[ruby-]2.2[.1]

[ruby-]2.2-head

ruby-head

ahora si,

$rvm install 2.2.1

pero

Error running 'requirements_osx_brew_libs_install automake libtool libksba',

showing last 15 lines of /Users/hedmon/.rvm/log/1428514809_ruby-2.2.1/package_install_automake_libtool_libksba.log

Las dependencias estaban instaladas pero no linkeadas, así que vamos a resolverlo con Homebrew.

$brew update

$brew upgrade

$brew link automake libtool libksba

ahora vuelvo a intentar

$rvm install 2.2.1

Entonces a probar instalar Cocoapods

$gem install cocoapods

voilá!

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