Permalink
Fetching contributors…
Cannot retrieve contributors at this time
91 lines (80 sloc) 2.61 KB
# =gem.rb: Gem Installer library
# Capistrano library to install and manage Ruby Gems.
#
# ----
# Copyright (c) 2007 Neil Wilson, Aldur Systems Ltd
#
# Licensed under the GNU Public License v2. No warranty is provided.
require 'capistrano'
# = Purpose
# Gem is a Capistrano plugin module providing a set of methods
# that invoke the *gem* package manager.
#
# Installs within Capistrano as the plugin _gem_.
#
# =Usage
#
# require 'vmbuilder_plugins/gem'
#
# Prefix all calls to the library with <tt>gem.</tt>
#
module Gem
# Default install command
#
# * doesn't install documentation
# * installs all required dependencies automatically.
#
GEM_INSTALL="gem install --no-rdoc --no-ri"
GEM_UPDATE=GEM_INSTALL.sub("install", "update")
# Upgrade the *gem* system to the latest version. Runs via *sudo*
def update_system
send(run_method, "#{GEM_UPDATE} --system")
end
# Updates all the installed gems to the latest version. Runs via *sudo*.
# Don't use this command if any of the gems require a version selection.
def upgrade
send(run_method, GEM_UPDATE)
end
# Removes old versions of gems from installation area.
def cleanup
send(run_method, "gem cleanup")
end
# Installs the gems detailed in +packages+, selecting version +version+ if
# specified.
#
# +packages+ can be a single string or an array of strings.
#
def install(packages, version=nil)
send(run_method,"#{GEM_INSTALL} #{if version then '-v '+version.to_s end} #{Array(packages).join(' ')}")
end
# Auto selects a gem from a list and installs it.
#
# *gem* has no mechanism on the command line of disambiguating builds for
# different platforms, and instead asks the user. This method has the necessary
# conversation to select the +version+ relevant to +platform+ (or the one nearest
# the top of the list if you don't specify +version+).
def select(package, version=nil, platform='ruby')
selections={}
cmd="#{GEM_INSTALL} #{if version then '-v '+version.to_s end} #{package}"
send run_method, cmd do |channel, stream, data|
data.each_line do | line |
case line
when /\s(\d+).*\(#{platform}\)/
if selections[channel[:host]].nil?
selections[channel[:host]]=$1.dup+"\n"
logger.info "Selecting #$&", "#{stream} :: #{channel[:host]}"
end
when /\s\d+\./
# Discard other selections from data stream
when /^>/
channel.send_data selections[channel[:host]]
logger.debug line, "#{stream} :: #{channel[:host]}"
else
logger.info line, "#{stream} :: #{channel[:host]}"
end
end
end
end
end
Capistrano.plugin :gem2, Gem
# vim: nowrap sw=2 sts=2 ts=8 ff=unix ft=ruby: