Add automated tests

.travis.yml

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+---
+language: perl
+install:
+  - sudo apt-get install devscripts python ruby php5-cli gawk
+  #
+  # Modules used by test script
+  - cpanm --notest Test::More File::Find Capture::Tiny
+  #
+  # Modules used by plugins
+  - cpanm --notest Asterisk::AMI Cache::Memcached BerkeleyDB DBD::Pg Data::Dump Device::SerialPort FCGI::Client File::ReadBackwards File::Tail::Multi Graphics::ColorNames IPC::Run3 IPC::ShareLite Modern::Perl MooseX::POE Net::Telnet Net::Telnet::Cisco POE Proc::ProcessTable Redis Sys::Virt WWW::Mechanize::TreeBuilder nvidia::ml
+  # Modules used by plugins, but missing on cpan
+  # - Sun::Solaris::Kstat
+  # - VMware::VIRuntime
+  # - MythTV
+script: "prove"

t/test.t

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+# -*- perl -*-
+
+use strict;
+use warnings;
+
+use Test::More;
+use File::Find ();
+use Capture::Tiny ':all';
+
+use vars qw/*name *dir *prune/;
+*name  = *File::Find::name;
+*dir   = *File::Find::dir;
+*prune = *File::Find::prune;
+my $num_plugins = 0;
+
+sub wanted {
+    my ( $dev, $ino, $mode, $nlink, $uid, $gid, $interpreter );
+
+    ( ( $dev, $ino, $mode, $nlink, $uid, $gid ) = lstat($_) )
+        && -f _
+        && ( $interpreter = hashbang("$_") )
+        && ++$num_plugins
+        && process_file( $_, $name, $interpreter );
+}
+
+File::Find::find( { wanted => \&wanted }, 'plugins' );
+
+sub hashbang {
+    my ($filename) = @_;
+    open my $file, '<', $filename;
+    my $firstline = <$file>;
+    close $file;
+
+    $firstline =~ m{ ^\#!                 # hashbang
+                     \s*                  # optional space
+                     (?:/usr/bin/env\s+)? # optional /usr/bin/env
+                     (?<interpreter>\S+)  # interpreter
+               }xm;
+
+    return $+{interpreter};
+}
+
+sub process_file {
+    my ( $file, $filename, $interpreter ) = @_;
+    use v5.10.1;
+
+    if ( $interpreter =~ m{/bin/sh} ) {
+        subtest $filename => sub {
+            plan tests => 2;
+            ok( check_file_with( [ 'sh', '-n', $file ] ), "sh syntax check" );
+            ok( check_file_with( [ 'checkbashisms', $file ] ),
+                "checkbashisms" );
+        };
+    }
+    elsif ( $interpreter =~ m{/bin/bash} ) {
+        ok( check_file_with( [ 'bash', '-n', $file ] ),
+            $filename . " bash syntax check" );
+    }
+    elsif ( $interpreter =~ m{perl} ) {
+        ok( check_file_with( [ 'perl', '-cw', $file ] ),
+            $filename . " perl syntax check" );
+    }
+    elsif ( $interpreter =~ m{python} ) {
+        ok( check_file_with(
+                [ 'pylint', '--errors-only', '--report=no', $file ]
+            ),
+            $filename . " python syntax check"
+        );
+    }
+    elsif ( $interpreter =~ m{php} ) {
+        ok( check_file_with( [ 'php', '-l', $file ] ),
+            $filename . " php syntax check" );
+    }
+    elsif ( $interpreter =~ m{j?ruby} ) {
+        ok( check_file_with( [ 'ruby', '-cw', $file ] ),
+            $filename . " ruby syntax check" );
+    }
+    elsif ( $interpreter =~ m{gawk} ) {
+        ok( check_file_with(
+                [   'gawk', '--source', "'BEGIN { exit(0) } END { exit(0) }'",
+                    '--file', $file
+                ]
+            ),
+            $filename . " gawk syntax check"
+        );
+    }
+    else {
+        fail( $filename . " unknown interpreter " . $interpreter );
+    }
+}
+
+sub check_file_with {
+    my ($check_command) = @_;
+    my ( $stdout, $stderr, $exit ) = capture {
+        system( @{$check_command} );
+    };
+    if ( $exit == 0 ) {
+        return 1;
+    }
+    else {
+        diag($stdout);
+        diag($stderr);
+        return;
+    }
+}
+
+done_testing($num_plugins);