From: Robert 'phaylon' Sedlacek <r.sedlacek@shadowcat.co.uk>
Date: Fri, 15 Jun 2012 01:37:57 +0000 (+0000)
Subject: find upgradable packages and optionally update apt index
X-Git-Tag: v0.001_001~47
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=025e0d3f36c4b9bc3fc7db95d80625cfa61ee389;p=scpubgit%2FSystem-Introspector.git

find upgradable packages and optionally update apt index
---

diff --git a/lib/System/Introspector/Probe/Packages/Apt.pm b/lib/System/Introspector/Probe/Packages/Apt.pm
index 3dee62b..2b8ccb4 100644
--- a/lib/System/Introspector/Probe/Packages/Apt.pm
+++ b/lib/System/Introspector/Probe/Packages/Apt.pm
@@ -6,20 +6,68 @@ use System::Introspector::Util qw(
     transform_exceptions
 );
 
+has apt_lists_dir => (is => 'ro', builder => 1);
+has apt_update_after => (is => 'ro', default => sub { 86400 });
+has apt_update => (is => 'ro');
+
+sub _build_apt_lists_dir { '/var/lib/apt/lists' }
+
 sub gather {
     my ($self) = @_;
     return {
+        update => {
+            last => $self->_last_apt_update,
+            run => transform_exceptions {
+                return { result => $self->_check_apt_state };
+            },
+        },
         installed => transform_exceptions {
             return { packages => $self->_gather_installed };
         },
+        upgradable => transform_exceptions {
+            return { actions => $self->_gather_upgradable };
+        },
     };
 }
 
+sub _last_apt_update {
+    my ($self) = @_;
+    return scalar( (stat($self->apt_lists_dir))[9] );
+}
+
+sub _check_apt_state {
+    my ($self) = @_;
+    return 'disabled' unless $self->apt_update;
+    my $threshold   = $self->apt_update_after;
+    my $last_change = $self->_last_apt_update;
+    return 'no'if ($last_change + $threshold) > time;
+    handle_from_command 'apt-get update';
+    return 'yes';
+}
+
 sub _open_dpkg_query_pipe {
     my ($self) = @_;
     return handle_from_command 'dpkg-query --show';
 }
 
+sub _open_apt_get_upgrade_simulation_pipe {
+    my ($self) = @_;
+    return handle_from_command 'apt-get -s upgrade';
+}
+
+sub _gather_upgradable {
+    my ($self) = @_;
+    my $pipe = $self->_open_apt_get_upgrade_simulation_pipe;
+    my %action;
+    while (defined( my $line = <$pipe> )) {
+        chomp $line;
+        if ($line =~ m{^(inst|remv)\s+(\S+)\s+(.+)$}i) {
+            $action{ lc($1) }{ $2 } = $3;
+        }
+    }
+    return \%action;
+}
+
 sub _gather_installed {
     my ($self) = @_;
     my $pipe = $self->_open_dpkg_query_pipe;