class Chef::Provider::Package::Yum::PythonHelper
Constants
- YUM_HELPER
Attributes
Public Instance Methods
# File lib/chef/provider/package/yum/python_helper.rb, line 80 def check start if stdin.nil? end
# File lib/chef/provider/package/yum/python_helper.rb, line 84 def close_rpmdb query("close_rpmdb", {}) end
In the default case for the yum provider we now do terrible things with ruby to concatenate all the properties together to form a single string to feed to the python which favors using returnPackages/searchProvides over the searchNevra API. That means that these two different ways of constructing the resource are now perfectly identical:
yum_package “zabbix-agent-4.0.15-1.fc31.x86_64”
yum_package “zabbix-agent” do
version "4.0.15-1.fc31" arch "x86_64"
end
This function handles turning the second form into the first form.
In the case where the epoch is given in the version and we do not have any glob patterns that is handled by going the other way and calling deconstruct_args
due to the yum libraries not supporting that calling pattern other than by searchNevra.
NOTE: This is an ugly hack and should NOT be considered an endorsement of this approach towards any kind of features or bugfixes in the DNF provider. I’m doing this because YUM is sunsetting at this point and its very difficult to fight with the libraries on the python side of things.
@api private
# File lib/chef/provider/package/yum/python_helper.rb, line 180 def combine_args(provides, version, arch) provides = provides.to_s.strip version = if !version.nil? && !version.empty? version.to_s.strip end arch = if !arch.nil? && !arch.empty? arch.to_s.strip end if version =~ /^[><=]/ if arch return { "provides" => "#{provides}.#{arch} #{version}" } else return { "provides" => "#{provides} #{version}" } end end maybe_arch = provides.rpartition(".").last if is_arch?(maybe_arch) arch = maybe_arch provides.delete_suffix!(".#{arch}") end provides = "#{provides}-#{version}" if version provides = "#{provides}.#{arch}" if arch # yum (on rhel7) can't handle an epoch in provides, but # deconstructing the args can't handle dealing with globs if provides =~ /-\d+:/ && provides !~ /[\*\?]/ deconstruct_args(provides) else { "provides" => provides } end end
# File lib/chef/provider/package/yum/python_helper.rb, line 88 def compare_versions(version1, version2) query("versioncompare", { "versions" => [version1, version2] }).to_i end
We have a provides line with an epoch in it and yum cannot parse that, so we need to deconstruct the args. This doesn’t support splats which is why we only do it for this particularly narrow use case.
name-epoch:version name-epoch:version.arch name-epoch:version-release name-epoch:version-release.arch
@api private
# File lib/chef/provider/package/yum/python_helper.rb, line 134 def deconstruct_args(provides) raise "provides must have an epoch in the version to deconstruct" unless provides =~ /^(\S+)-(\d+):(\S+)/ name = $1 epoch = $2 other = $3 ret = { "provides" => name, "epoch" => epoch } maybe_arch = other.rpartition(".").last arch = if is_arch?(maybe_arch) other.delete_suffix!(".#{maybe_arch}") maybe_arch end ret.merge!({ "arch" => arch }) if arch (version, _, release) = other.rpartition("-") if version.empty? ret.merge!({ "version" => release }) # yeah, rpartition is just weird else ret.merge!({ "version" => version, "release" => release }) end end
# File lib/chef/provider/package/yum/python_helper.rb, line 92 def install_only_packages(name) query_output = query("installonlypkgs", { "package" => name }) if query_output == "False" false elsif query_output == "True" true end end
# File lib/chef/provider/package/yum/python_helper.rb, line 118 def is_arch?(arch) # cspell:disable-next arches = %w{aarch64 alpha alphaev4 alphaev45 alphaev5 alphaev56 alphaev6 alphaev67 alphaev68 alphaev7 alphapca56 armv5tejl armv5tel armv5tl armv6l armv7l armv8l armv6hl armv7hl armv7hnl armv8hl i386 athlon geode i386 i486 i586 i686 ia64 mips mipsel mips64 mips64el noarch ppc ppc64 ppc64iseries ppc64p7 ppc64pseries ppc64le riscv32 riscv64 riscv128 s390 s390x sh3 sh4 sh4a sparc sparc64 sparc64v sparcv8 sparcv9 sparcv9v x86_64 amd64 ia32e} arches.include?(arch) end
# File lib/chef/provider/package/yum/python_helper.rb, line 101 def options_params(options) options.each_with_object({}) do |opt, h| if opt =~ /--enablerepo=(.+)/ $1.split(",").each do |repo| h["repos"] ||= [] h["repos"].push( { "enable" => repo } ) end end if opt =~ /--disablerepo=(.+)/ $1.split(",").each do |repo| h["repos"] ||= [] h["repos"].push( { "disable" => repo } ) end end end end
@return Array<Version> NB: “options” here is the yum_package options hash and is deliberately not **opts
# File lib/chef/provider/package/yum/python_helper.rb, line 213 def package_query(action, provides, version: nil, arch: nil, options: {}) parameters = combine_args(provides, version, arch) repo_opts = options_params(options || {}) parameters.merge!(repo_opts) # XXX: for now we close the rpmdb before and after every query with an enablerepo/disablerepo to clean the helpers internal state close_rpmdb unless repo_opts.empty? query_output = query(action, parameters) version = parse_response(query_output.lines.last) Chef::Log.trace "parsed #{version} from python helper" close_rpmdb unless repo_opts.empty? version end
# File lib/chef/provider/package/yum/python_helper.rb, line 61 def reap unless wait_thr.nil? Process.kill("INT", wait_thr.pid) rescue nil begin Timeout.timeout(3) do wait_thr.value # this calls waitpid() end rescue Timeout::Error Process.kill("KILL", wait_thr.pid) rescue nil end stdin.close unless stdin.nil? stdout.close unless stdout.nil? stderr.close unless stderr.nil? inpipe.close unless inpipe.nil? outpipe.close unless outpipe.nil? @stdin = @stdout = @stderr = @inpipe = @outpipe = @wait_thr = nil end end
# File lib/chef/provider/package/yum/python_helper.rb, line 226 def restart reap start end
# File lib/chef/provider/package/yum/python_helper.rb, line 53 def start @inpipe, inpipe_write = IO.pipe outpipe_read, @outpipe = IO.pipe @stdin, @stdout, @stderr, @wait_thr = Open3.popen3("#{yum_command} #{outpipe_read.fileno} #{inpipe_write.fileno}", outpipe_read.fileno => outpipe_read, inpipe_write.fileno => inpipe_write, close_others: false) outpipe_read.close inpipe_write.close end
# File lib/chef/provider/package/yum/python_helper.rb, line 42 def yum_command @yum_command ||= begin cmd = which("platform-python", "python", "python2", "python2.7", extra_path: "/usr/libexec") do |f| shell_out("#{f} -c 'import yum'").exitstatus == 0 end raise Chef::Exceptions::Package, "cannot find yum libraries, you may need to use dnf_package" unless cmd "#{cmd} #{YUM_HELPER}" end end
Private Instance Methods
# File lib/chef/provider/package/yum/python_helper.rb, line 245 def build_query(action, parameters) hash = { "action" => action } parameters.each do |param_name, param_value| hash[param_name] = param_value unless param_value.nil? end FFI_Yajl::Encoder.encode(hash) end
# File lib/chef/provider/package/yum/python_helper.rb, line 259 def drain_fds output = "" fds, = IO.select([stderr, stdout, inpipe], nil, nil, 0) unless fds.nil? fds.each do |fd| output += fd.sysread(4096) rescue "" end end output rescue => e output end
# File lib/chef/provider/package/yum/python_helper.rb, line 254 def parse_response(output) array = output.split.map { |x| x == "nil" ? nil : x } array.each_slice(3).map { |x| Version.new(*x) }.first end
# File lib/chef/provider/package/yum/python_helper.rb, line 233 def query(action, parameters) with_helper do json = build_query(action, parameters) Chef::Log.trace "sending '#{json}' to python helper" outpipe.puts json outpipe.flush output = inpipe.readline.chomp Chef::Log.trace "got '#{output}' from python helper" output end end
# File lib/chef/provider/package/yum/python_helper.rb, line 272 def with_helper max_retries ||= 5 ret = nil Timeout.timeout(600) do check ret = yield end output = drain_fds unless output.empty? Chef::Log.trace "discarding output on stderr/stdout from python helper: #{output}" end ret rescue => e output = drain_fds restart if ( max_retries -= 1 ) > 0 && !ENV["YUM_HELPER_NO_RETRIES"] unless output.empty? Chef::Log.trace "discarding output on stderr/stdout from python helper: #{output}" end retry else raise e if output.empty? raise "yum-helper.py had stderr/stdout output:\n\n#{output}" end end