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upgrader.rb
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upgrader.rb
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require 'pathname'
require 'puppet/forge'
require 'puppet/module_tool'
require 'puppet/module_tool/shared_behaviors'
require 'puppet/module_tool/install_directory'
require 'puppet/module_tool/installed_modules'
module Puppet::ModuleTool
module Applications
class Upgrader < Application
include Puppet::ModuleTool::Errors
def initialize(name, options)
super(options)
@action = :upgrade
@environment = options[:environment_instance]
@name = name
@ignore_changes = forced? || options[:ignore_changes]
@ignore_dependencies = forced? || options[:ignore_dependencies]
Semantic::Dependency.add_source(installed_modules_source)
Semantic::Dependency.add_source(module_repository)
end
def run
name = @name.tr('/', '-')
version = options[:version] || '>= 0.0.0'
results = {
:action => :upgrade,
:requested_version => options[:version] || :latest,
}
begin
all_modules = @environment.modules_by_path.values.flatten
matching_modules = all_modules.select do |x|
x.forge_name && x.forge_name.tr('/', '-') == name
end
if matching_modules.empty?
raise NotInstalledError, results.merge(:module_name => name)
elsif matching_modules.length > 1
raise MultipleInstalledError, results.merge(:module_name => name, :installed_modules => matching_modules)
end
installed_release = installed_modules[name]
# `priority` is an attribute of a `Semantic::Dependency::Source`,
# which is delegated through `ModuleRelease` instances for the sake of
# comparison (sorting). By default, the `InstalledModules` source has
# a priority of 10 (making it the most preferable source, so that
# already installed versions of modules are selected in preference to
# modules from e.g. the Forge). Since we are specifically looking to
# upgrade this module, we don't want the installed version of this
# module to be chosen in preference to those with higher versions.
#
# This implementation is suboptimal, and since we can expect this sort
# of behavior to be reasonably common in Semantic, we should probably
# see about implementing a `ModuleRelease#override_priority` method
# (or something similar).
def installed_release.priority
0
end
mod = installed_release.mod
results[:installed_version] = Semantic::Version.parse(mod.version)
dir = Pathname.new(mod.modulepath)
vstring = mod.version ? "v#{mod.version}" : '???'
Puppet.notice "Found '#{name}' (#{colorize(:cyan, vstring)}) in #{dir} ..."
unless @ignore_changes
changes = Checksummer.run(mod.path) rescue []
if mod.has_metadata? && !changes.empty?
raise LocalChangesError,
:action => :upgrade,
:module_name => name,
:requested_version => results[:requested_version],
:installed_version => mod.version
end
end
Puppet::Forge::Cache.clean
# Ensure that there is at least one candidate release available
# for the target package.
available_versions = module_repository.fetch(name)
if available_versions.empty?
raise NoCandidateReleasesError, results.merge(:module_name => name, :source => module_repository.host)
elsif results[:requested_version] != :latest
requested = Semantic::VersionRange.parse(results[:requested_version])
unless available_versions.any? {|m| requested.include? m.version}
raise NoCandidateReleasesError, results.merge(:module_name => name, :source => module_repository.host)
end
end
Puppet.notice "Downloading from #{module_repository.host} ..."
if @ignore_dependencies
graph = build_single_module_graph(name, version)
else
graph = build_dependency_graph(name, version)
end
unless forced?
add_module_name_constraints_to_graph(graph)
end
installed_modules.each do |installed_module, release|
installed_module = installed_module.tr('/', '-')
next if installed_module == name
version = release.version
unless forced?
# Since upgrading already installed modules can be troublesome,
# we'll place constraints on the graph for each installed
# module, locking it to upgrades within the same major version.
installed_range = ">=#{version} #{version.major}.x"
graph.add_constraint('installed', installed_module, installed_range) do |node|
Semantic::VersionRange.parse(installed_range).include? node.version
end
release.mod.dependencies.each do |dep|
dep_name = dep['name'].tr('/', '-')
range = dep['version_requirement']
graph.add_constraint("#{installed_module} constraint", dep_name, range) do |node|
Semantic::VersionRange.parse(range).include? node.version
end
end
end
end
begin
Puppet.info "Resolving dependencies ..."
releases = Semantic::Dependency.resolve(graph)
rescue Semantic::Dependency::UnsatisfiableGraph
raise NoVersionsSatisfyError, results.merge(:requested_name => name)
end
releases.each do |rel|
if mod = installed_modules_source.by_name[rel.name.split('-').last]
next if mod.has_metadata? && mod.forge_name.tr('/', '-') == rel.name
if rel.name != name
dependency = {
:name => rel.name,
:version => rel.version
}
end
raise InstallConflictError,
:requested_module => name,
:requested_version => options[:version] || 'latest',
:dependency => dependency,
:directory => mod.path,
:metadata => mod.metadata
end
end
child = releases.find { |x| x.name == name }
unless forced?
if child.version == results[:installed_version]
versions = graph.dependencies[name].map { |r| r.version }
newer_versions = versions.select { |v| v > results[:installed_version] }
raise VersionAlreadyInstalledError,
:module_name => name,
:requested_version => results[:requested_version],
:installed_version => results[:installed_version],
:newer_versions => newer_versions,
:possible_culprits => installed_modules_source.fetched.reject { |x| x == name }
elsif child.version < results[:installed_version]
raise DowngradingUnsupportedError,
:module_name => name,
:requested_version => results[:requested_version],
:installed_version => results[:installed_version]
end
end
Puppet.info "Preparing to upgrade ..."
releases.each { |release| release.prepare }
Puppet.notice 'Upgrading -- do not interrupt ...'
releases.each do |release|
if installed = installed_modules[release.name]
release.install(Pathname.new(installed.mod.modulepath))
else
release.install(dir)
end
end
results[:result] = :success
results[:base_dir] = releases.first.install_dir
results[:affected_modules] = releases
results[:graph] = [ build_install_graph(releases.first, releases) ]
rescue VersionAlreadyInstalledError => e
results[:result] = (e.newer_versions.empty? ? :noop : :failure)
results[:error] = { :oneline => e.message, :multiline => e.multiline }
rescue => e
results[:error] = {
:oneline => e.message,
:multiline => e.respond_to?(:multiline) ? e.multiline : [e.to_s, e.backtrace].join("\n")
}
ensure
results[:result] ||= :failure
end
results
end
private
def module_repository
@repo ||= Puppet::Forge.new
end
def installed_modules_source
@installed ||= Puppet::ModuleTool::InstalledModules.new(@environment)
end
def installed_modules
installed_modules_source.modules
end
def build_single_module_graph(name, version)
range = Semantic::VersionRange.parse(version)
graph = Semantic::Dependency::Graph.new(name => range)
releases = Semantic::Dependency.fetch_releases(name)
releases.each { |release| release.dependencies.clear }
graph << releases
end
def build_dependency_graph(name, version)
Semantic::Dependency.query(name => version)
end
def build_install_graph(release, installed, graphed = [])
previous = installed_modules[release.name]
previous = previous.version if previous
action = :upgrade
unless previous && previous != release.version
action = :install
end
graphed << release
dependencies = release.dependencies.values.map do |deps|
dep = (deps & installed).first
if dep == installed_modules[dep.name]
next
end
if dep && !graphed.include?(dep)
build_install_graph(dep, installed, graphed)
end
end.compact
return {
:release => release,
:name => release.name,
:path => release.install_dir,
:dependencies => dependencies.compact,
:version => release.version,
:previous_version => previous,
:action => action,
}
end
include Puppet::ModuleTool::Shared
end
end
end