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# frozen_string_literal: true
require 'time'
require 'json'
require_relative '../../../lib/gitlab/popen' unless defined?(Gitlab::Popen)
module Tooling
class Helm3Client
CommandFailedError = Class.new(StandardError)
attr_reader :namespace
RELEASE_JSON_ATTRIBUTES = %w[name revision updated status chart app_version namespace].freeze
PAGINATION_SIZE = 256 # Default helm list pagination size
Release = Struct.new(:name, :revision, :last_update, :status, :chart, :app_version, :namespace) do
def revision
@revision ||= self[:revision].to_i
end
def last_update
@last_update ||= self[:last_update] ? Time.parse(self[:last_update]) : nil
end
end
# A single page of data and the corresponding page number.
Page = Struct.new(:releases, :number)
def initialize(namespace:)
@namespace = namespace
end
def releases(args: [])
each_release(args)
end
def delete(release_name:)
run_command([
'uninstall',
release_name
])
end
private
def run_command(command)
final_command = ['helm', *command].join(' ')
puts "Running command: `#{final_command}`" # rubocop:disable Rails/Output
result = Gitlab::Popen.popen_with_detail([final_command])
if result.status.success?
result.stdout.chomp.freeze
else
raise CommandFailedError, "The `#{final_command}` command failed (status: #{result.status}) with the following error:\n#{result.stderr}"
end
end
def raw_releases(page, args = [])
command = [
'list',
%(--max #{PAGINATION_SIZE}),
%(--offset #{PAGINATION_SIZE * page}),
%(--output json),
*args
]
response = run_command(command)
releases = JSON.parse(response) # rubocop:disable Gitlab/Json
releases.map do |release|
Release.new(*release.values_at(*RELEASE_JSON_ATTRIBUTES))
end
rescue ::JSON::ParserError => ex
puts "Ignoring this JSON parsing error: #{ex}\n\nResponse was:\n#{response}" # rubocop:disable Rails/Output
[]
end
# Fetches data from Helm and yields a Page object for every page
# of data, without loading all of them into memory.
#
# method - The Octokit method to use for getting the data.
# args - Arguments to pass to the `helm list` command.
def each_releases_page(args, &block)
return to_enum(__method__, args) unless block
page = 0
final_args = args.dup
begin
collection = raw_releases(page, final_args)
yield Page.new(collection, page += 1)
end while collection.any?
end
# Iterates over all of the releases.
#
# args - Any arguments to pass to the `helm list` command.
def each_release(args, &block)
return to_enum(__method__, args) unless block
each_releases_page(args) do |page|
page.releases.each do |release|
yield release
end
end
end
end
end
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