Add type GUIDs to partitions resolver

lib/facter/resolvers/partitions.rb

@@ -69,13 +69,14 @@ def populate_partitions(partition_name, block_path, blkid_and_lsblk, backing_fil
                         size: Facter::Util::Facts::UnitConverter.bytes_to_human_readable(size_bytes),
                         backing_file: backing_file }
           info_hash.merge!(populate_from_syscalls(partition_name, blkid_and_lsblk))
-          @fact_list[:partitions][partition_name] = info_hash.reject { |_key, value| value.nil? }
+          @fact_list[:partitions][partition_name] = info_hash.compact
         end
 
         def populate_from_syscalls(partition_name, blkid_and_lsblk)
-          part_info = populate_from_blkid(partition_name, blkid_and_lsblk)
+          # Prefer lsblk over blkid since lsblk does not require root, returns more information, and is recommended by blkid
+          part_info = populate_from_lsblk(partition_name, blkid_and_lsblk)
 
-          return populate_from_lsblk(partition_name, blkid_and_lsblk) if part_info.empty?
+          return populate_from_blkid(partition_name, blkid_and_lsblk) if part_info.empty?
 
           part_info
         end
@@ -121,26 +122,46 @@ def execute_and_extract_blkid_info
         def populate_from_lsblk(partition_name, blkid_and_lsblk)
           return {} unless available?('lsblk', blkid_and_lsblk)
 
-          blkid_and_lsblk[:lsblk] ||= Facter::Core::Execution.execute('lsblk -fp', logger: log)
+          lsblk_version_raw = Facter::Core::Execution.execute('lsblk --version 2>&1', logger: log)
+          lsblk_version = lsblk_version_raw.match(/ \d\.\d+/)[0].to_f
 
-          part_info = blkid_and_lsblk[:lsblk].match(/#{partition_name}.*/).to_s.split(' ')
-          return {} if part_info.empty?
+          # The -p/--paths option was added in lsblk 2.23, return early and fall back to blkid with earlier versions
+          return {} if lsblk_version < 2.23
 
-          parse_part_info(part_info)
-        end
+          blkid_and_lsblk[:lsblk] ||= execute_and_extract_lsblk_info(lsblk_version)
 
-        def parse_part_info(part_info)
-          result = { filesystem: part_info[1] }
+          partition_data = blkid_and_lsblk[:lsblk][partition_name]
+          return {} unless partition_data
 
-          if part_info.count.eql?(5)
-            result[:label] = part_info[2]
-            result[:uuid] = part_info[3]
-          else
-            result[:uuid] = part_info[2]
-          end
+          filesys = partition_data['FSTYPE']
+          uuid = partition_data['UUID']
+          label = partition_data['LABEL']
+          part_uuid = partition_data['PARTUUID']
+          part_label = partition_data['PARTLABEL']
+          part_type = partition_data['PARTTYPE']
+
+          result = { filesystem: filesys, uuid: uuid, label: label, partuuid: part_uuid, partlabel: part_label }
+          result[:parttype] = part_type if part_type
 
           result
         end
+
+        def execute_and_extract_lsblk_info(lsblk_version)
+          # lsblk 2.25 added support for GPT partition type GUIDs
+          stdout = if lsblk_version >= 2.25
+                     Facter::Core::Execution.execute('lsblk -p -P -o NAME,FSTYPE,UUID,LABEL,PARTUUID,PARTLABEL,PARTTYPE', logger: log)
+                   else
+                     Facter::Core::Execution.execute('lsblk -p -P -o NAME,FSTYPE,LABEL,UUID,PARTUUID,PARTLABEL', logger: log)
+                   end
+
+          output_hash = Hash[*stdout.split(/^(NAME=\S+)/)[1..-1]]
+          output_hash.transform_keys! { |key| key.delete('NAME=')[1..-2] }
+          output_hash.each do |key, value|
+            output_hash[key] = Hash[*value.chomp.rstrip.split(/ ([^= ]+)=/)[1..-1].each { |x| x.delete!('"') }]
+          end
+          output_hash.each_value { |value_hash| value_hash.delete_if { |_k, v| v.empty? } }
+          output_hash.delete_if { |_k, v| v.empty? }
+        end
       end
     end
   end

lib/schema/facter.yaml

@@ -1335,6 +1335,9 @@ partitions:
                 backing_file:
                     type: string
                     description: The path to the file backing the partition.
+                parttype:
+                    type: string
+                    description: The partition type GUID.
 
 path:
     type: string

spec/facter/resolvers/partitions_spec.rb

@@ -42,7 +42,9 @@
       allow(Facter::Core::Execution).to receive(:which)
         .with('lsblk').and_return('/usr/bin/lsblk')
       allow(Facter::Core::Execution).to receive(:execute)
-        .with('lsblk -fp', logger: an_instance_of(Facter::Log)).and_return(load_fixture('lsblk_output').read)
+        .with('lsblk --version 2>&1', logger: an_instance_of(Facter::Log)).and_return('lsblk from util-linux 2.24')
+      allow(Facter::Core::Execution).to receive(:execute)
+        .with('lsblk -p -P -o NAME,FSTYPE,LABEL,UUID,PARTUUID,PARTLABEL', logger: an_instance_of(Facter::Log)).and_return(load_fixture('lsblk_output_old').read)
     end
 
     context 'when block has a device subdir' do
@@ -68,12 +70,12 @@
       context 'when there is more than one partition' do
         it 'checks for blkid only once' do
           resolver.resolve(:partitions)
-          expect(Facter::Core::Execution).to have_received(:which).with('blkid').once
+          expect(Facter::Core::Execution).to have_received(:which).with('blkid').at_most(:once)
         end
 
         it 'checks for lsblk only once' do
           resolver.resolve(:partitions)
-          expect(Facter::Core::Execution).to have_received(:which).with('lsblk').once
+          expect(Facter::Core::Execution).to have_received(:which).with('lsblk').at_most(:once)
         end
       end
 
@@ -189,5 +191,43 @@
         end
       end
     end
+
+    context 'when lsblk can read partition types' do
+      let(:partitions) do
+        { '/dev/sda1' => { filesystem: 'ext3', label: '/boot', parttype: '21686148-6449-6E6F-744E-656564454649', size: '117.00 KiB',
+                           size_bytes: 119_808, uuid: '88077904-4fd4-476f-9af2-0f7a806ca25e',
+                           partuuid: '00061fe0-01' },
+          '/dev/sda2' => { filesystem: 'LVM2_member', parttype: '0fc63daf-8483-4772-8e79-3d69d8477de4', size: '98.25 MiB',
+                           size_bytes: 103_021_056, uuid: 'edi7s0-2WVa-ZBan' } }
+      end
+
+      let(:sda_subdirs) do
+        ['/sys/block/sda/queue',
+         '/sys/block/sda/sda2',
+         '/sys/block/sda/sda2/stat',
+         '/sys/block/sda/sda2/dev',
+         '/sys/block/sda/sda2/uevent',
+         '/sys/block/sda/sda1']
+      end
+
+      before do
+        allow(File).to receive(:directory?).with("#{sys_block_path}/sda/device").and_return(true)
+        allow(Dir).to receive(:[]).with("#{sys_block_path}/sda/**/*").and_return(sda_subdirs)
+        sda_subdirs.each { |subdir| allow(File).to receive(:directory?).with(subdir).and_return(true) }
+        allow(Facter::Util::FileHelper).to receive(:safe_read)
+          .with("#{sys_block_path}/sda/sda2/size", '0').and_return('201213')
+        allow(Facter::Util::FileHelper).to receive(:safe_read)
+          .with("#{sys_block_path}/sda/sda1/size", '0').and_return('234')
+      end
+
+      it 'return partitions fact with part_type' do
+        allow(Facter::Core::Execution).to receive(:execute)
+          .with('lsblk --version 2>&1', logger: an_instance_of(Facter::Log)).and_return('lsblk from util-linux 2.25')
+        allow(Facter::Core::Execution).to receive(:execute)
+          .with('lsblk -p -P -o NAME,FSTYPE,UUID,LABEL,PARTUUID,PARTLABEL,PARTTYPE', logger: an_instance_of(Facter::Log)).and_return(load_fixture('lsblk_output_new').read)
+
+        expect(resolver.resolve(:partitions)).to eq(partitions)
+      end
+    end
   end
 end

spec/fixtures/lsblk_output_new

@@ -0,0 +1,3 @@
+NAME="/dev/sda" FSTYPE="" UUID="" LABEL="" PARTUUID="" PARTLABEL="" PARTTYPE=""
+NAME="/dev/sda1" FSTYPE="ext3" UUID="88077904-4fd4-476f-9af2-0f7a806ca25e" LABEL="/boot" PARTUUID="00061fe0-01" PARTLABEL="" PARTTYPE="21686148-6449-6E6F-744E-656564454649"
+NAME="/dev/sda2" FSTYPE="LVM2_member" UUID="edi7s0-2WVa-ZBan" LABEL="" PARTUUID="" PARTLABEL="" PARTTYPE="0fc63daf-8483-4772-8e79-3d69d8477de4"

spec/fixtures/lsblk_output_old

@@ -0,0 +1,3 @@
+NAME="/dev/sda" FSTYPE="" UUID="" LABEL="" PARTUUID="" PARTLABEL="" PARTTYPE=""
+NAME="/dev/sda1" FSTYPE="ext3" UUID="88077904-4fd4-476f-9af2-0f7a806ca25e" LABEL="/boot" PARTUUID="00061fe0-01" PARTLABEL=""
+NAME="/dev/sda2" FSTYPE="LVM2_member" UUID="edi7s0-2WVa-ZBan" LABEL="" PARTUUID="" PARTLABEL=""