X-Git-Url: http://git.refcnt.org/?p=distdns.git;a=blobdiff_plain;f=client.pl;h=2a73f4e6de5f0f9218a98c69758224f40aed0841;hp=729663f51a3c9a0b37148fddb617b9aa26960326;hb=HEAD;hpb=eb97e893a835f728f4bff344d937d0b1813f711e

diff --git a/client.pl b/client.pl
index 729663f..2a73f4e 100755
--- a/client.pl
+++ b/client.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl
 #
-# Copyright (c) 2013 Michel Ketterle, Steven Schubiger
+# Copyright (c) 2013, 2015 Michel Ketterle, Steven Schubiger
 #
 # This file is part of distdns.
 #
@@ -21,19 +21,41 @@ use strict;
 use warnings;
 use constant false => 0;
 
-use Config::Tiny;
-use Digest::MD5 qw(md5_hex);
-use Fcntl ':flock';
-use File::Spec::Functions qw(catfile rel2abs);
-use FindBin qw($Bin);
-use Getopt::Long qw(:config no_auto_abbrev no_ignore_case);
-use JSON qw(decode_json);
-use LWP::UserAgent;
-use POSIX qw(strftime);
-use Sys::Hostname qw(hostname);
-use Tie::File;
+BEGIN
+{
+    my @modules = (
+        [ 'Config::Tiny',          [                                           ] ],
+        [ 'Digest::MD5',           [ qw(md5_hex)                               ] ],
+        [ 'Fcntl',                 [ qw(:flock)                                ] ],
+        [ 'File::Spec::Functions', [ qw(catfile rel2abs)                       ] ],
+        [ 'FindBin',               [ qw($Bin)                                  ] ],
+        [ 'Getopt::Long',          [ qw(:config no_auto_abbrev no_ignore_case) ] ],
+        [ 'JSON',                  [ qw(decode_json)                           ] ],
+        [ 'LWP::UserAgent',        [                                           ] ],
+        [ 'POSIX',                 [ qw(strftime)                              ] ],
+        [ 'Sys::Hostname',         [ qw(hostname)                              ] ],
+        [ 'Tie::File',             [                                           ] ],
+    );
+    my (@missing, @import);
+    foreach my $module (@modules) {
+        unless (eval "require $module->[0]; 1") {
+            push @missing, $module->[0];
+            next;
+        }
+        unless (eval { $module->[0]->import(@{$module->[1]}); 1 }) {
+            push @import, $module->[0];
+        }
+    }
+    if (@missing || @import) {
+        warn <<"EOT";
+Modules missing: @missing
+Import failures: @import
+EOT
+        exit 1;
+    }
+}
 
-my $VERSION = '0.06';
+my $VERSION = '0.07';
 
 my $conf_file = catfile($Bin, 'client.conf');
 
@@ -94,8 +116,7 @@ my $save_session = sub
 my $get_session = sub
 {
     open(my $fh, '<', $session_file) or _die "Cannot open $session_file for reading: $!\nPerhaps try running --init\n";
-    my $session = do { local $/; <$fh> };
-    chomp $session;
+    chomp(my $session = <$fh>);
     close($fh);
 
     return $session;