/usr/lib/ruby/vendor_ruby/octocatalog-diff/util/catalogs.rb is in octocatalog-diff 1.5.3-1.
This file is owned by root:root, with mode 0o644.
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require 'json'
require 'open3'
require 'yaml'
require_relative '../catalog'
require_relative '../errors'
require_relative 'parallel'
module OctocatalogDiff
module Util
# Helper class to construct catalogs, performing all necessary steps such as
# bootstrapping directories, installing facts, and running puppet.
class Catalogs
# Constructor
# @param options [Hash] Options
# @param logger [Logger] Logger object
def initialize(options, logger)
@options = options
@logger = logger
@catalogs = nil
raise '@logger must not be nil' if @logger.nil?
end
# Compile catalogs. This handles building both the old and new catalog (in parallel) and returns
# only when both catalogs have been built.
# @return [Hash] { :from => [OctocatalogDiff::Catalog], :to => [OctocatalogDiff::Catalog] }
def catalogs
@catalogs ||= build_catalog_parallelizer
end
# Handles the "bootstrap then exit" option, which bootstraps directories but
# exits without compiling catalogs.
def bootstrap_then_exit
@logger.debug('Begin bootstrap_then_exit')
OctocatalogDiff::CatalogUtil::Bootstrap.bootstrap_directory_parallelizer(@options, @logger)
@logger.debug('Success bootstrap_then_exit')
@logger.info('Successfully completed --bootstrap-then-exit action')
end
private
# Parallelizes bootstrapping of directories and building catalogs.
# @return [Hash] { :from => OctocatalogDiff::Catalog, :to => OctocatalogDiff::Catalog }
def build_catalog_parallelizer
# Construct parallel tasks. The array supplied to OctocatalogDiff::Util::Parallel is the task portion
# of each of the tuples in catalog_tasks.
catalog_tasks = build_catalog_tasks
# Update any tasks for catalogs that do not need to be compiled. This is the case when --catalog-only
# is specified and only one catalog is to be built. This will change matching catalog tasks to the 'noop' type.
catalog_tasks.map! do |x|
if @options["#{x[0]}_catalog".to_sym] == '-'
x[1].args[:backend] = :noop
elsif @options["#{x[0]}_catalog".to_sym].is_a?(String)
x[1].args[:json] = File.read(@options["#{x[0]}_catalog".to_sym])
x[1].args[:backend] = :json
end
x
end
# Initialize the objects for each parallel task. Initializing the object is very fast and does not actually
# build the catalog.
result = {}
catalog_tasks.each do |x|
result[x[0]] = OctocatalogDiff::Catalog.create(x[1].args)
@logger.debug "Initialized #{result[x[0]].builder} for #{x[0]}-catalog"
end
# Disable --compare-file-text if either (or both) of the chosen backends do not support it
if @options.fetch(:compare_file_text, false)
result.each do |_key, builder_obj|
next if builder_obj.convert_file_resources(true)
@logger.debug "Disabling --compare-file-text; not supported by #{builder_obj.builder}"
@options[:compare_file_text] = false
catalog_tasks.map! do |x|
x[1].args[:compare_file_text] = false
x
end
break
end
end
# Inject the starting object into the catalog tasks
catalog_tasks.map! do |x|
x[1].args[:object] = result[x[0]]
x
end
# Execute the parallelized catalog builds
passed_catalog_tasks = catalog_tasks.map { |x| x[1] }
parallel_catalogs = OctocatalogDiff::Util::Parallel.run_tasks(passed_catalog_tasks, @logger, @options[:parallel])
# If the catalogs array is empty at this point, there is an unexpected size mismatch. This should
# never happen, but test for it anyway.
unless parallel_catalogs.size == catalog_tasks.size
# :nocov:
raise "BUG: mismatch catalog_result (#{parallel_catalogs.size} vs #{catalog_tasks.size})"
# :nocov:
end
# If catalogs failed to compile, report that. Prefer to display an actual failure message rather
# than a generic incomplete parallel task message if there is a more specific message present.
failures = parallel_catalogs.reject(&:status)
if failures.any?
f = failures.reject { |r| r.exception.is_a?(OctocatalogDiff::Util::Parallel::IncompleteTask) }.first
f ||= failures.first
raise f.exception
end
# Construct result hash. Will eventually be in the format
# { :from => OctocatalogDiff::Catalog, :to => OctocatalogDiff::Catalog }
# Analyze the results from parallel run.
catalog_tasks.each do |x|
# The `parallel_catalog_obj` is a OctocatalogDiff::Util::Parallel::Result. Get the first element from
# the parallel_catalogs output.
parallel_catalog_obj = parallel_catalogs.shift
# Add the result to the 'result' hash
add_parallel_result(result, parallel_catalog_obj, x)
end
# Things have succeeded if the :to and :from catalogs exist at this point. If not, things have
# failed, and an exception should be thrown.
return result if result.key?(:to) && result.key?(:from)
# This is believed to be a bug condition.
# :nocov:
raise OctocatalogDiff::Errors::CatalogError, 'One or more catalogs failed to compile.'
# :nocov:
end
# Get catalog compilation tasks.
# @return [Array<[key, task]>] Catalog tasks
def build_catalog_tasks
[:from, :to].map do |key|
# These are arguments to OctocatalogDiff::Util::Parallel::Task. In most cases the arguments
# of OctocatalogDiff::Util::Parallel::Task are taken directly from options, but there are
# some defaults or otherwise-named options that must be set here.
args = @options.merge(
tag: key.to_s,
branch: @options["#{key}_env".to_sym] || '-',
bootstrapped_dir: @options["bootstrapped_#{key}_dir".to_sym],
basedir: @options[:basedir],
compare_file_text: @options.fetch(:compare_file_text, true),
retry_failed_catalog: @options.fetch(:retry_failed_catalog, 0),
parser: @options["parser_#{key}".to_sym]
)
args[:basedir] ||= args[:bootstrapped_dir]
# If any options are in the form of 'to_SOMETHING' or 'from_SOMETHING', this sets the option to
# 'SOMETHING' for the catalog if it matches this key. For example, when compiling the 'to' catalog
# when an option of :to_some_arg => 'foo', this sets :some_arg => foo, and deletes :to_some_arg and
# :from_some_arg.
@options.keys.select { |x| x.to_s =~ /^(to|from)_/ }.each do |opt_key|
args[opt_key.to_s.sub(/^(to|from)_/, '').to_sym] = @options[opt_key] if opt_key.to_s.start_with?(key.to_s)
args.delete(opt_key)
end
# Skip reference validation in the from-catalog by saying we already performed it.
args[:references_validated] = (key == :from)
# The task is a OctocatalogDiff::Util::Parallel::Task object that contains the method to execute,
# validator method, text description, and arguments to provide when calling the method.
task = OctocatalogDiff::Util::Parallel::Task.new(
method: method(:build_catalog),
validator: method(:catalog_validator),
validator_args: { task: key },
description: "build_catalog for #{@options["#{key}_env".to_sym]}",
args: args
)
# The format of `catalog_tasks` will be a tuple, where the first element is the key
# (e.g. :to or :from) and the second element is the OctocatalogDiff::Util::Parallel::Task object.
[key, task]
end.compact
end
# Given a result from the 'parallel' run and a corresponding (key,task) tuple, add valid
# catalogs to the 'result' hash and throw errors for invalid catalogs.
# @param result [Hash] Result hash for build_catalog_parallelizer (may be modified)
# @param parallel_catalog_obj [OctocatalogDiff::Util::Parallel::Result] Parallel catalog result
# @param key_task_tuple [Array<key, task>] Key, task tuple
def add_parallel_result(result, parallel_catalog_obj, key_task_tuple)
# Expand the tuple into variables
key, task = key_task_tuple
# For reporting purposes, get the branch name.
branch = task.args[:branch]
# Check the result of the parallel run on this object.
if parallel_catalog_obj.status.nil?
# The compile was killed because another task failed.
@logger.warn "Catalog compile for #{branch} was aborted due to another failure"
elsif parallel_catalog_obj.output.is_a?(OctocatalogDiff::Catalog)
# The result is a catalog, but we do not know if it was successfully compiled
# until we test the validity.
catalog = parallel_catalog_obj.output
if catalog.valid?
# The catalog was successfully compiled.
result[key] = parallel_catalog_obj.output
if task.args[:save_catalog]
File.open(task.args[:save_catalog], 'w') { |f| f.write(catalog.catalog_json) }
@logger.debug "Saved catalog to #{task.args[:save_catalog]}"
end
else
# The catalog failed, but a catalog object was returned so that better error reporting
# can take place. In this error reporting, we will replace 'Error:' with '[Puppet Error]'
# and remove the compilation directory (which is a tmpdir) to reveal only the relative
# path to the files involved.
dir = catalog.compilation_dir || ''
dir_regex = Regexp.new(Regexp.escape(dir) + '/environments/[^/]+/')
error_display = catalog.error_message.split("\n").map do |line|
line.sub(/^Error:/, '[Puppet Error]').gsub(dir_regex, '')
end.join("\n")
message = "Catalog for #{branch} failed to compile due to errors:\n#{error_display}"
raise OctocatalogDiff::Errors::CatalogError, message
end
else
# Something unhandled went wrong, and an exception was thrown. Reveal a generic message.
# :nocov:
msg = parallel_catalog_obj.exception.message
message = "Catalog for '#{key}' (#{branch}) failed to compile with #{parallel_catalog_obj.exception.class}: #{msg}"
message += "\n" + parallel_catalog_obj.exception.backtrace.map { |x| " #{x}" }.join("\n") if @options[:debug]
raise OctocatalogDiff::Errors::CatalogError, message
# :nocov:
end
end
# Performs the steps necessary to build a catalog.
# @param opts [Hash] Options hash
# @return [Hash] { :rc => exit code, :catalog => Catalog as JSON string }
def build_catalog(opts, logger = @logger)
logger.debug("Setting up Puppet catalog build for #{opts[:branch]}")
catalog = opts[:object]
logger.debug("Catalog for #{opts[:branch]} will be built with #{catalog.builder}")
time_start = Time.now
catalog.build(logger)
time_it_took = Time.now - time_start
retries_str = " retries = #{catalog.retries}" if catalog.retries.is_a?(Integer)
time_str = "in #{time_it_took} seconds#{retries_str}"
status_str = catalog.valid? ? 'successfully built' : 'failed'
logger.debug "Catalog for #{opts[:branch]} #{status_str} with #{catalog.builder} #{time_str}"
catalog
end
# The catalog validator method can indicate failure one of two ways:
# - Raise an exception (this is preferred, since it gives a specific error message)
# - Return false (supported but discouraged, since it only surfaces a generic error)
# @param catalog [OctocatalogDiff::Catalog] Catalog object
# @param logger [Logger] Logger object (presently unused)
# @param args [Hash] Additional arguments set specifically for validator
# @return [Boolean] Return true if catalog is valid, false otherwise
def catalog_validator(catalog = nil, _logger = @logger, _args = {})
raise ArgumentError, "Expects a catalog, got #{catalog.class}" unless catalog.is_a?(OctocatalogDiff::Catalog)
raise OctocatalogDiff::Errors::CatalogError, "Catalog failed: #{catalog.error_message}" unless catalog.valid?
true
end
end
end
end
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