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Contents
require 'forwardable'
require 'engineyard-serverside/about'
module EY
module Serverside
# Propagator ensures that a proper version of the engineyard-serverside
# gem is installed on a given set of servers
class Propagator
def self.propagate(servers, shell)
new(servers, shell).propagate
end
extend Forwardable
def_delegators About, :gem_binary, :gem_file, :gem_filename, :gem_name,
:name_with_version, :version
attr_reader :servers, :shell
def initialize(servers, shell)
@servers = servers
@shell = shell
end
def propagate
shell.status "Verifying and propagating #{name_with_version} to all servers."
servers.remote.run_for_each! do |server|
propagation_command_for(server)
end
end
private
def propagation_command_for(server)
check = server.command_on_server('sh -l -c', check_command)
scp = server.scp_command(About.gem_file, remote_gem_file)
install = server.command_on_server('sudo sh -l -c', install_command)
"(#{check}) || ((#{scp}) && (#{install}))"
end
def remote_gem_file
@remote_gem_file ||= File.join(Dir.tmpdir, gem_filename)
end
def check_command
# the [,)] is to stop us from looking for e.g. 0.5.1, seeing
# 0.5.11, and mistakenly thinking 0.5.1 is there
%{#{gem_binary} list #{gem_name} | grep "#{gem_name}" | egrep -q "#{version.gsub(/\./, '\.')}[,)]"}
end
def install_command
"#{gem_binary} install --no-rdoc --no-ri '#{remote_gem_file}'"
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems