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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/modify_packages                 Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

use strict;
use warnings;

use Cpanel::Config::Constants ('DEFAULT_CPANEL_THEME');
use Cpanel::Logger        ();
use Cpanel::SafeFile      ();
use Cpanel::Themes::Utils ();

use Whostmgr::ACLS            ();
use Whostmgr::Packages::Fetch ();
use Whostmgr::Packages::Load  ();

use Getopt::Long ();

my $logger = Cpanel::Logger->new();

$| = 1;

if ( $> != 0 ) {
    $logger->die("Sorry, only root can use this script.");
}

my ( $theme, $packages, $help, $all_packages );

Getopt::Long::GetOptions(
    'help'         => \$help,
    'theme=s'      => \$theme,
    'all-packages' => \$all_packages,
    'packages=s'   => \$packages
  )
  || do {
    usage();
    exit 1;
  };

if ($help) {
    usage();
    exit;
}

unless ( $theme && ( $all_packages || $packages ) ) {
    usage();
    exit 1;
}

my $theme_docroot = Cpanel::Themes::Utils::get_theme_root($theme);
$logger->die( "The specified theme [" . $theme . "] does not exist." ) unless -d $theme_docroot;

if ( !$ENV{'REMOTE_USER'} ) { $ENV{'REMOTE_USER'} = 'root'; }

Whostmgr::ACLS::init_acls();

my @list_pkgs = ();

my %pkgs = %{ Whostmgr::Packages::Fetch::fetch_package_list( 'want' => 'editable' ) };

my %valid_pkgs = ();

if ($all_packages) {
    @list_pkgs  = keys %pkgs;
    %valid_pkgs = map { ( $_ => $pkgs{$_} ) } @list_pkgs;
}
else {
    @list_pkgs  = split( /\s*\,\s*/, $packages );
    %valid_pkgs = map { exists( $pkgs{"$_"} ) ? ( $_ => $pkgs{$_} ) : () } @list_pkgs;
}

unless ( scalar( keys %valid_pkgs ) ) {
    $logger->die("No valid packages are specified.");
}

my %updated_pkgs = ();
my $package_dir  = Whostmgr::Packages::Load::package_dir();
foreach my $name ( keys %valid_pkgs ) {

    # Should not happen but just in case
    next unless -e $package_dir . $name;

    my $pkglock = Cpanel::SafeFile::safeopen( \*PKG, '+<', $package_dir . $name );
    if ( !$pkglock ) {
        $logger->warn("Could not edit ${package_dir}$name");
        next;
    }

    $updated_pkgs{$name} = 1;
    my %PKG_CONFIG = %{ $valid_pkgs{$name} };
    seek( PKG, 0, 0 );
    foreach my $pkgitem ( sort keys %PKG_CONFIG ) {
        next if !$pkgitem;
        next if ( $pkgitem eq '_PACKAGE_EXTENSIONS' );
        my $line = qq{$pkgitem=$PKG_CONFIG{$pkgitem}};
        $line =~ s/[\r\n]//g;
        if ( $pkgitem eq 'CPMOD' ) {
            $line = qq{$pkgitem=$theme};
        }
        print PKG $line . "\n";
    }
    print PKG qq{_PACKAGE_EXTENSIONS=$PKG_CONFIG{_PACKAGE_EXTENSIONS}\n} if $PKG_CONFIG{_PACKAGE_EXTENSIONS};    # _PACKAGE_EXTENSIONS last in file.
    truncate( PKG, tell(PKG) );
    Cpanel::SafeFile::safeclose( \*PKG, $pkglock );
}

# The default package may or may not have a file.
my @failed_pkgs = grep { !$updated_pkgs{$_} && $_ ne 'default' } @list_pkgs;
if ( scalar @failed_pkgs ) {
    $logger->warn( "Could not update these package(s): " . join( ', ', @failed_pkgs ) );
    exit 1;
}
else {
    $logger->info("Packages are successfully updated.");
    exit 0;
}

sub usage {
    print <<"EOM";

$0: Modify existing packages to use a theme

Usage:
    $0 --theme=$Cpanel::Config::Constants::DEFAULT_CPANEL_THEME [--packages=my_pkg,another_pkg|--all-packages]

  Options:
    --help: print usage and exit
    --theme: the theme to be adopted
    --packages: a list of packages to be modified, comma separated
    --all-packages: update all packages on the system

EOM
    return;
}