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require "chef/resource"
class Chef
class Resource
# @author Joshua Timberman <jtimberman@chef.io>
# @author Steve Nolen <technolengy@gmail.com>
# resource to install modules from CPAN
class CpanModule < Chef::Resource
resource_name :cpan_module
property :module_name, String, name_property: true
property :cpam_bin_path, String, default: "/usr/local/bin/cpanm"
property :force, [true, false], default: false
property :test, [true, false], default: false
property :version, String
property :cwd, String
action :install do
declare_resource(:execute, "CPAN :install #{new_resource.module_name}") do
cwd current_working_dir
command cpanm_install_cmd
environment "HOME" => current_working_dir, "PATH" => "/usr/local/bin:/usr/bin:/bin"
not_if { module_exists_new_enough }
end
end
action :uninstall do
declare_resource(:execute, "CPAN :uninstall #{new_resource.module_name}") do
cwd current_working_dir
command cpanm_uninstall_cmd
only_if module_exists
end
end
action_class do
def module_exists_new_enough
existing_version = parse_cpan_version
return false if existing_version.empty? # mod doesn't exist
return true if new_resource.version.nil? # mod exists and version is unimportant
@comparator, @pending_version = new_resource.version.split(" ", 2)
@current_vers = Gem::Version.new(existing_version)
@pending_vers = Gem::Version.new(@pending_version)
@current_vers.method(@comparator).call(@pending_vers)
end
def parse_cpan_version
mod_ver_cmd = shell_out("perl -M#{new_resource.module_name} -e 'print $#{new_resource.module_name}::VERSION;' 2> /dev/null")
mod_ver = mod_ver_cmd.stdout
return mod_ver if mod_ver.empty?
# remove leading v and convert underscores to dots since gems parses them wrong
mod_ver.gsub!(/v_/, "v" => 3, "_" => ".")
# in the event that this command outputs whatever it feels like, only keep the first vers number!
version_match = /(^[0-9.]*)/.match(mod_ver)
version_match[0]
end
# builds a string of the perl command to see if the module exists
# @return [String]
def module_exists
"perl -m#{new_resource.module_name} -e ';' 2> /dev/null"
end
def cpanm_install_cmd
@cmd = "#{new_resource.cpam_bin_path} --quiet "
@cmd += "--force " if new_resource.force
@cmd += "--notest " unless new_resource.test
@cmd += new_resource.module_name
@cmd += parsed_version
@cmd
end
def cpanm_uninstall_cmd
@cmd = "#{new_resource.cpam_bin_path} "
@cmd += "--force " if new_resource.force
@cmd += "--uninstall "
@cmd += new_resource.module_name
@cmd
end
# a bit of a stub, could use a version parser for really consistent expeirence
def parsed_version
return "~\"#{new_resource.version}\"" if new_resource.version
""
end
def current_working_dir
return new_resource.cwd if new_resource.cwd
return "/var/root" if node["platform"] == "mac_os_x"
"/root"
end
end
end
end
end
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