From 60092f3a0f0f5ff59804cdde5a77ae72155a978b Mon Sep 17 00:00:00 2001
From: Jan Tomsa <jan@tomsa.xyz>
Date: Thu, 28 May 2020 10:52:31 +0200
Subject: [PATCH] Fix `undefined method '[]' for nil:NilClass` when creating
 filesystem on existing partitions without FS

---
 lib/puppet/provider/filesystem/lvm.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/puppet/provider/filesystem/lvm.rb b/lib/puppet/provider/filesystem/lvm.rb
index a5422f56..c13216d3 100644
--- a/lib/puppet/provider/filesystem/lvm.rb
+++ b/lib/puppet/provider/filesystem/lvm.rb
@@ -18,7 +18,12 @@ def destroy
   end
 
   def fstype
-    %r{\bTYPE=\"(\S+)\"}.match(blkid(@resource[:name]))[1]
+    type_match = %r{\bTYPE=\"(\S+)\"}.match(blkid(@resource[:name]))
+    # when creating FS on a non LVM partition that already exists but does not have FS
+    # blkid output does not contain `TYPE=....` -> type_match is nil
+    if type_match
+      type_match[1]
+    end
   rescue Puppet::ExecutionFailure
     nil
   end