plugin: dir: implement import content type

in DirPlugin and not Plugin (because of cyclic dependency of
Plugin -> OVF -> Storage -> Plugin otherwise)

only ovf is currently supported (though ova will be shown in import
listing), expects the files to not be in a subdir, and adjacent to the
ovf file.

listed will be all ovf/qcow2/raw/vmdk files.
ovf because it can be imported, and the rest because they can be used
in the 'import-from' part of qemu-server.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Reviewed-by: Fiona Ebner <f.ebner@proxmox.com>

src/test/parse_volname_test.pm

@@ -86,6 +86,14 @@ my $tests = [
 	expected    => ['snippets', 'hookscript.pl'],
     },
     #
+    # Import
+    #
+    {
+	description => "Import, ovf",
+	volname     => 'import/import.ovf',
+	expected    => ['import', 'import.ovf', undef, undef, undef ,undef, 'ovf'],
+    },
+    #
     # failed matches
     #
     {
@@ -123,6 +131,11 @@ my $tests = [
 	volname     => "$vmid/base-$vmid-disk-0.qcow2/ssss/vm-$vmid-disk-0.qcow2",
 	expected    => "unable to parse volume filename 'base-$vmid-disk-0.qcow2/ssss/vm-$vmid-disk-0.qcow2'\n",
     },
+    {
+	description => "Failed match: import dir but no ova/ovf/disk image",
+	volname	    => "import/test.foo",
+	expected    => "unable to parse directory volume name 'import/test.foo'\n",
+    },
 ];
 
 # create more test cases for VM disk images matches

src/test/path_to_volume_id_test.pm

@@ -190,6 +190,14 @@ my @tests = (
 	    'local:vztmpl/debian-10.0-standard_10.0-1_amd64.tar.xz',
 	],
     },
+    {
+	description => 'Import, ovf',
+	volname     => "$storage_dir/import/import.ovf",
+	expected    => [
+	    'import',
+	    'local:import/import.ovf',
+	],
+    },
 
     # no matches, path or files with failures
     {
@@ -237,6 +245,11 @@ my @tests = (
 	volname     => "$storage_dir/images/ssss/vm-1234-disk-0.qcow2",
 	expected    => [''],
     },
+    {
+	description => 'Import, non ova/ovf/disk image in import dir',
+	volname     => "$storage_dir/import/test.foo",
+	expected    => [''],
+    },
 );
 
 plan tests => scalar @tests + 1;