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reformat code for snapshot tree into GuestHelpers

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qm/pct listsnapshot lack feature parity w.r.t. showing snapshots in a
tree ordered by the date. by moving this code into GuestHelpers, it can
be shared.

Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>
This commit is contained in:
Oguz Bektas 2019-10-01 09:32:45 +02:00 committed by Thomas Lamprecht
parent 1daaf2ea3f
commit 725dcadba3
1 changed files with 54 additions and 0 deletions
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54
PVE/GuestHelpers.pm
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@ -6,6 +6,8 @@ use warnings;
use PVE::Tools;
use PVE::Storage;
use POSIX qw(strftime);
# We use a separate lock to block migration while a replication job
# is running.
@ -60,4 +62,56 @@ sub exec_hookscript {
}
}
sub snapshot_tree {
my ($res) = @_;
my $snapshots = { map { $_->{name} => $_ } @$res };
my @roots;
foreach my $e (@$res) {
my $parent;
if (($parent = $e->{parent}) && defined $snapshots->{$parent}) {
push @{$snapshots->{$parent}->{children}}, $e->{name};
} else {
push @roots, $e->{name};
}
}
# sort the elements by snaptime - with "current" (no snaptime) highest
my $snaptimesort = sub {
return +1 if !defined $snapshots->{$a}->{snaptime};
return -1 if !defined $snapshots->{$b}->{snaptime};
return $snapshots->{$a}->{snaptime} <=> $snapshots->{$b}->{snaptime};
};
# recursion function for displaying the tree
my $snapshottree;
$snapshottree = sub {
my ($prefix, $root, $snapshots) = @_;
my $e = $snapshots->{$root};
my $description = $e->{description} || 'no-description';
($description) = $description =~ m/(.*)$/m;
my $timestring = "";
if (defined $e->{snaptime}) {
$timestring = strftime("%F %H:%M:%S", localtime($e->{snaptime}));
}
my $len = 30 - length($prefix); # for aligning the description
printf("%s %-${len}s %-23s %s\n", $prefix, $root, $timestring, $description);
if ($e->{children}) {
$prefix = " $prefix";
foreach my $child (sort $snaptimesort @{$e->{children}}) {
$snapshottree->($prefix, $child, $snapshots);
}
}
};
foreach my $root (sort $snaptimesort @roots) {
$snapshottree->('`->', $root, $snapshots);
}
}
1;