如何将shell设置为bash以便在Capistrano中运行？

Question

如何在Capistrano运行命令中设置shell以使用bash而不是sh？我正在尝试安装RVM,我需要执行命令:

run "bash < <(curl -L http://bit.ly/rvm-install-system-wide)"

如:

task :install_rvm, :roles => :server do
  apps = %w(bison openssl libreadline6 libreadline6-dev zlib1g zlib1g-dev libssl-dev     libyaml-dev sqlite3 libsqlite3-0 libxml2-dev libxslt-dev autoconf subversion libcurl4-openssl-dev)
  apt.install( {:base => apps}, :stable )
  run "bash < <(curl -L http://bit.ly/rvm-install-system-wide)"
  run "rvm install 1.9.2".sh
  run "rvm use 1.9.2@global"
  run "gem install awesome_print map_by_method wirble bundler builder pg cheat"
  run "gem install -v2.1.2 builder"
  # modify .bashrc
end

但我似乎无法让它工作,因为Capistrano正在执行:

"sh -c 'bash < <(curl -L http://bit.ly/rvm-install-system-wide)'" on ubuntu@ec2...

我在Capistrano gem中看到command.rb文件有一些代码

shell = "#{options[:shell] || "sh"} -c"

但我不清楚如何options[:shell]完成任务

Answer 1

set:shell不工作,但是有效:

default_run_options[:shell] = '/bin/bash'

Answer 2

听起来你需要rvm-capistrano宝石.另一个选择是使用rvm-capistrano使用的机制,即:

set :default_shell, '/bin/bash -l'

Answer 3

尝试设置:shell变量。

set :shell, '/usr/bin/bash'