#! /usr/bin/env perl

use strict;
use warnings;
use Getopt::Long;

# used as a small file to download and install sysinfo client

# perl install_sysinfo_client.pl \
#      --dryRun \
#      --repo=http://svn.dailydata.net/svn/camp_sysinfo_client_3/tags/stable \
#      --target ~/test \
#      --seed=http://example.com/private/sysinfo-client.seed.yaml

# define the version number
# see https://metacpan.org/pod/release/JPEACOCK/version-0.97/lib/version.pod
use version;
our $VERSION = version->declare("v1.001.002");

my %operatingSystems = (
   'linux' => '/opt/camp/sysinfo-client',
   'freebsd' => '/usr/local/opt/camp/sysinfo-client'
   );
   
   
# location of the installer library so we can set stuff up correctly
my $libraryFile = 'installer/installer_config.pl';

my $configurationTool = 'installer/install --quiet';

Getopt::Long::Configure ("bundling"); # allow -vd --os='debian'
my $repository = 'http://svn.dailydata.net/svn/camp_sysinfo_client_3/tags/stable';
my $svn = '';
my $dryRun = 0;
my $os;
my $help = 0;
my $version = 0;
my $targetDir;
my $seedFileURL;


# simple display if --help is passed
sub help {
   my $oses = join( ', ', keys %operatingSystems );
   use File::Basename;
   print basename($0) . " $VERSION\n";
   print <<END
$0 [options]
Options:
   --os      - osname, one of [$oses]
   --dryrun  - do not actually do anything, just tell you what I'd do
   --version - display version and exit
   --svn     - path to svn command
   --repo    - full URL of subversion repository
   --target  - Target directory for installation
   --seed    - URL to download a seed file for new installs
END
}


################################################################
#               Main Code                                      #
################################################################

# handle any command line parameters that may have been passed in

GetOptions (
            "os|o=s"      => \$os,      # pass in the operating system
            "dryrun|n"    => \$dryRun,  # do NOT actually do anything
            'help|h'      => \$help,
            'version|v'   => \$version,
            'svn|s=s'     => \$svn,
            'repo|r=s'    => \$repository,
            'target|t=s'  => \$targetDir,
            'seed=s'      => \$seedFileURL
            ) or die "Error parsing command line\n";
                  
if ( $help ) { &help() ; exit; }
if ( $version ) { use File::Basename; print basename($0) . " $VERSION\n"; exit; }
unless ( $svn ) {
   $svn = `which svn`;
   chomp $svn;
   }
die "Could not locate svn command\n" unless $svn;
die "This installer requires subversion, and it is not found on this system\n" unless `$svn --version --quiet`;

$os = $^O unless $os;

$targetDir = $operatingSystems{$os} unless $targetDir;
die "Can not determine targetDirectory for operating system $os, aborting\n" unless $targetDir;

# the directory exists and is not an svn repo, so move it
if ( -e $targetDir && system( "svn info $targetDir >/dev/null 2>&1" ) ) { 
   print "$targetDir exists and is not an svn URL; moving to $targetDir.backup\n";
   `mv $targetDir $targetDir.backup` unless $dryRun;
}
if ( -d $targetDir ) { # target is a directory, and an svn repo
   print "Performing an update on $targetDir\n";
   `svn update $targetDir` unless $dryRun;
} else { # doesn't exist, so create and do a checkout
   print "Creating target directory $targetDir\n";
   `mkdir -p $targetDir` unless -d $targetDir || $dryRun; # verify the target directory exists
   print "Installing into $targetDir using $svn checkout $repository to $targetDir\n";
   `$svn checkout $repository $targetDir` unless $dryRun;
}

if ( $seedFileURL && ! $dryRun ) {
   my $seedFileName = $targetDir . '/installer/sysinfo-client.seed.yaml';
   print "Downloading seed file from $seedFileURL to $seedFileName\n";
   `wget --quiet --output-document=$seedFileName $seedFileURL`;
   die "Error downloading $seedFileURL into $seedFileName\n" if $?;
   $configurationTool .= " --seed $seedFileName";
}

$libraryFile = "$targetDir/$libraryFile";

if ( -f $libraryFile ) {
   # load the definitions from installer_config.pl
   do $libraryFile;
   print "Success loading library file\n";
} else {
   die "Could not load library file from $libraryFile\nAborting installation\n";
}

print "Now running $targetDir/$configurationTool\n";
exec( "$targetDir/$configurationTool" ) unless $dryRun;
#https://metacpan.org/pod/Hash%3a%3aMerge

1;