[Storage] Delete the shared directory only if the directory exists and it is empty.

We introduce the condition of existence because otherwise, the empty condition may fail when the directory does not exist.

Signed-off-by: Giacomo Marciani <mgiacomo@amazon.com>

Author: gmarciani

cookbooks/aws-parallelcluster-environment/resources/efs/partial/_mount_umount.rb

@@ -120,7 +120,7 @@
       mode '1777'
       recursive false
       action :delete
-      only_if { Dir.empty?(efs_shared_dir.to_s) }
+      only_if { Dir.exist?(efs_shared_dir.to_s) && Dir.empty?(efs_shared_dir.to_s) }
     end
   end
 end

cookbooks/aws-parallelcluster-environment/resources/lustre/partial/_mount_unmount.rb

@@ -92,7 +92,7 @@
       mode '1777'
       recursive false
       action :delete
-      only_if { Dir.empty?(fsx.shared_dir) }
+      only_if { Dir.exist?(fsx.shared_dir) && Dir.empty?(fsx.shared_dir) }
     end
   end
 end

cookbooks/aws-parallelcluster-environment/resources/volume.rb

@@ -114,7 +114,7 @@
   directory shared_dir do
     recursive false
     action :delete
-    only_if { Dir.empty?(shared_dir) }
+    only_if { Dir.exist?(shared_dir) && Dir.empty?(shared_dir) }
   end
 end
 

cookbooks/aws-parallelcluster-environment/spec/unit/resources/efs_spec.rb

@@ -355,7 +355,9 @@ def mock_already_installed(package, expected_version, installed)
       before do
         stub_command("mount | grep ' /shared_dir_1 '").and_return(false)
         stub_command("mount | grep ' /shared_dir_2 '").and_return(true)
+        allow(Dir).to receive(:exist?).with("/shared_dir_1").and_return(true)
         allow(Dir).to receive(:empty?).with("/shared_dir_1").and_return(true)
+        allow(Dir).to receive(:exist?).with("/shared_dir_2").and_return(true)
         allow(Dir).to receive(:empty?).with("/shared_dir_2").and_return(false)
       end
 
@@ -382,7 +384,7 @@ def mock_already_installed(package, expected_version, installed)
         end
       end
 
-      it "deletes shared dir only if empty" do
+      it "deletes shared dir only if it exists and it is empty" do
         is_expected.to delete_directory('/shared_dir_1')
           .with(recursive: false)
 

cookbooks/aws-parallelcluster-environment/spec/unit/resources/lustre_mount_spec.rb

@@ -362,7 +362,9 @@
         before do
           stub_command("mount | grep ' /shared_dir_1 '").and_return(false)
           stub_command("mount | grep ' /shared_dir_2 '").and_return(true)
+          allow(Dir).to receive(:exist?).with("/shared_dir_1").and_return(true)
           allow(Dir).to receive(:empty?).with("/shared_dir_1").and_return(true)
+          allow(Dir).to receive(:exist?).with("/shared_dir_2").and_return(true)
           allow(Dir).to receive(:empty?).with("/shared_dir_2").and_return(false)
         end
 
@@ -386,7 +388,7 @@
             .with(pattern: "lustre_id_2.fsx.REGION.amazonaws.com@tcp:/mount_name_2 *")
         end
 
-        it 'deletes shared dir only if empty' do
+        it 'deletes shared dir only if it exists and it is empty' do
           is_expected.to delete_directory('/shared_dir_1')
             .with(recursive: false)
           is_expected.not_to delete_directory('/shared_dir_2')
@@ -417,7 +419,9 @@
         before do
           stub_command("mount | grep ' /shared_dir_1 '").and_return(false)
           stub_command("mount | grep ' /shared_dir_2 '").and_return(true)
+          allow(Dir).to receive(:exist?).with("/shared_dir_1").and_return(true)
           allow(Dir).to receive(:empty?).with("/shared_dir_1").and_return(true)
+          allow(Dir).to receive(:exist?).with("/shared_dir_2").and_return(true)
           allow(Dir).to receive(:empty?).with("/shared_dir_2").and_return(false)
         end
 
@@ -441,7 +445,7 @@
             .with(pattern: "ontap_id_2.fsx.REGION.amazonaws.com:/junction_path_2 *")
         end
 
-        it 'deletes shared dir only if empty' do
+        it 'deletes shared dir only if it exists and it is empty' do
           is_expected.to delete_directory('/shared_dir_1')
             .with(recursive: false)
           is_expected.not_to delete_directory('/shared_dir_2')
@@ -472,7 +476,9 @@
         before do
           stub_command("mount | grep ' /filecache_dir_1 '").and_return(false)
           stub_command("mount | grep ' /filecache_dir_2 '").and_return(true)
+          allow(Dir).to receive(:exist?).with("/filecache_dir_1").and_return(true)
           allow(Dir).to receive(:empty?).with("/filecache_dir_1").and_return(true)
+          allow(Dir).to receive(:exist?).with("/filecache_dir_2").and_return(true)
           allow(Dir).to receive(:empty?).with("/filecache_dir_2").and_return(false)
         end
 
@@ -496,7 +502,7 @@
             .with(pattern: "filecache_dns_name_2@tcp:/filecache_mount_name_2 *")
         end
 
-        it 'deletes shared dir only if empty' do
+        it 'deletes shared dir only if it exists and it is empty' do
           is_expected.to delete_directory('/filecache_dir_1')
             .with(recursive: false)
           is_expected.not_to delete_directory('/filecache_dir_2')

cookbooks/aws-parallelcluster-environment/spec/unit/resources/volume_spec.rb

@@ -134,6 +134,7 @@
 
             before do
               stub_command("mount | grep ' /SHARED_DIR '").and_return(false)
+              allow(Dir).to receive(:exist?).with("/SHARED_DIR").and_return(true)
               allow(Dir).to receive(:empty?).with("/SHARED_DIR").and_return(is_dir_empty)
             end
 
@@ -147,7 +148,7 @@
                 .with(pattern: " /SHARED_DIR ")
             end
 
-            it "deletes shared dir only if empty" do
+            it "deletes shared dir only if it exists and it is empty" do
               if is_dir_empty
                 is_expected.to delete_directory('/SHARED_DIR')
                   .with(recursive: false)
@@ -174,6 +175,7 @@
 
             before do
               stub_command("mount | grep ' /SHARED_DIR '").and_return(true)
+              allow(Dir).to receive(:exist?).with("/SHARED_DIR").and_return(true)
               allow(Dir).to receive(:empty?).with("/SHARED_DIR").and_return(is_dir_empty)
             end
 
@@ -189,7 +191,7 @@
                 .with(pattern: " /SHARED_DIR ")
             end
 
-            it "deletes shared dir only if empty" do
+            it "deletes shared dir only if it exists and it is empty" do
               if is_dir_empty
                 is_expected.to delete_directory('/SHARED_DIR')
                   .with(recursive: false)