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Filename : installpostgres
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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/installpostgres                 Copyright 2021 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

package scripts::installpostgres;

use strict;
use warnings;

use Cpanel::Debug                 ();
use Cpanel::OS                    ();
use Cpanel::SafeRun::Simple       ();
use Cpanel::SysPkgs               ();
use Cpanel::Chkservd::Manage      ();
use Cpanel::PostgresUtils         ();
use Cpanel::PostgresUtils::PgPass ();
use Cpanel::ServerTasks           ();
use Whostmgr::Postgres            ();

exit( run(@ARGV) // 0 ) unless caller();

sub help {
    my $msg = <<EOF;
Usage: installpostgres [--help] [--yes]

    Installs the supported version of PostgreSQL.

Options:

    --help          This message.
    --yes           Bypass confirmation prompt.

EOF

    print $msg;

    return 0;
}

sub prompt {
    my ( $message, @args ) = @_;

    chomp $message;
    print $message;

    if ( !@args || $args[0] !~ /\-\-yes/ ) {
        my $res = <STDIN>;
        if ( $res !~ /^y/i ) {
            print "Exiting...\n";
            exit();
        }
    }

    return;
}

# replace system calls
sub _run_and_log_cmd {    ## no critic(RequireArgUnpacking) # doesn't make sense in this case
    Cpanel::Debug::log_debug( '[EXEC] ' . join( " ", @_ ) );
    my $out = Cpanel::SafeRun::Simple::saferunallerrors(@_);
    chomp($out);
    Cpanel::Debug::log_info($out);
    return $out;
}

# Get more info with CPANEL_DEBUG_LEVEL set
sub _debug_run_and_log_cmd {    ## no critic(RequireArgUnpacking) # doesn't make sense in this case
    Cpanel::Debug::log_debug( '[EXEC] ' . join( " ", @_ ) ) if $Cpanel::Debug::level;
    my $out = Cpanel::SafeRun::Simple::saferunallerrors(@_);
    chomp($out);
    Cpanel::Debug::log_debug($out) if $Cpanel::Debug::level;
    return $out;
}

sub run {
    my @args = @_;

    return help() if grep { $_ eq '--help' } @args;

    die "cPanel does not support PostgreSQL on this system at this time!" unless Cpanel::OS::supports_postgresql();

    my $restart_instruction = Cpanel::OS::is_systemd() ? "\tsystemctl restart postgresql" : "\t/sbin/service postgresql stop\n" . "\t/sbin/service postgresql start\n";
    my $minversion          = Cpanel::OS::postgresql_minimum_supported_version() . '.x';

    if ( my $old_pg_home = Cpanel::PostgresUtils::find_pgsql_home() ) {
        my $notice = <<"EOS";
This script installs PostgreSQL $minversion or later.
If your system runs an older version of PostgreSQL, you must
dump your databases to a file, and then restore them after
installation.
PostgreSQL $minversion is NOT backwards compatible.
If no PostgreSQL databases exist on your system, run the
following command to force the creation of a PostgreSQL $minversion -style
setup:
\tmv $old_pg_home $old_pg_home.old
$restart_instruction
Do not run this command if databases exist that you wish to keep!
Are you certain that you wish to proceed? [y/(n)]:
EOS

        prompt( $notice, @args );
    }
    else {
        my $notice = <<"EOS";
This script installs PostgreSQL $minversion or later.
Are you certain that you wish to proceed? [y/(n)]:
EOS

        prompt( $notice, @args );
    }

    Cpanel::Debug::log_info("Installing Postgres...");

    my $syspkgobj = Cpanel::SysPkgs->new();
    if ( !$syspkgobj ) { die Cpanel::Debug::log_error("The system could not create the SysPkgs object."); }

    $syspkgobj->install( 'pkglist' => Cpanel::OS::postgresql_packages() );

    my $pg_user = Cpanel::PostgresUtils::PgPass::getpostgresuser();
    my $pg_home = Cpanel::PostgresUtils::find_pgsql_home( 'user' => $pg_user );
    my $pg_data = Cpanel::PostgresUtils::find_pgsql_data( 'home' => $pg_home );

    my @cmd;

    foreach my $alias ( @{ Cpanel::OS::postgresql_service_aliases() } ) {
        my $service = 'postgresql';
        if ( !-e "/etc/init.d/$service" && -e "/etc/init.d/$alias" ) {
            symlink( $alias, "/etc/init.d/$service" );
        }
    }

    if ( !-e "$pg_data/global" ) {
        foreach my $cmd ( @{ Cpanel::OS::postgresql_initdb_commands() } ) {
            @cmd = split ' ', $cmd;
            _debug_run_and_log_cmd(@cmd);
        }
    }

    @cmd = qw{/usr/local/cpanel/scripts/setpostgresconfig --force};
    _debug_run_and_log_cmd(@cmd);

    @cmd = qw{/usr/local/cpanel/scripts/cpservice postgresql enable 35};
    _debug_run_and_log_cmd(@cmd);

    my ( $status, $message );
    Cpanel::Debug::log_info("Updating postgresql configuration now...");
    ( $status, $message ) = Whostmgr::Postgres::update_config();
    print $message. "\n" if $message;

    Cpanel::Debug::log_info("Attempting to restart postgresql...");
    @cmd = qw{/usr/local/cpanel/scripts/restartsrv postgresql};
    _debug_run_and_log_cmd(@cmd);
    my $install_ok = $? == 0 ? 1 : 0;

    if ($install_ok) {

        Cpanel::Debug::log_info("Creating dbowners for existing cpusers...");
        ( $status, $message ) = Whostmgr::Postgres::create_dbowners_for_cpusers();
        print $message. "\n";

        $install_ok &&= $status;

        if ($install_ok) {

            print q{

The PostgreSQL packages successfully installed. To configure PostgreSQL,
set your password, and enable PostgreSQL for user accounts, navigate to
WHM's Configure PostgreSQL interface (Home >> SQL Services >> Configure PostgreSQL).

};
            print "Setting a random password for the PostgreSQL database user.\n";

            _debug_run_and_log_cmd( '/usr/local/cpanel/bin/postgrescheck', '--check-auth', '--reset-pass-on-fail' );

            _debug_run_and_log_cmd('/usr/local/cpanel/bin/cpsessetup');

            # If PostgreSQL has never been listed under chkservd, enable monitoring for it.
            # (This might happen if the service was uninstalled manually but reinstalled with this script.)
            # Doing this prevents /scripts/check_unmonitored_enabled_services from complaining to the admin
            # who is installing PostgreSQL for the first time on this system.
            my %MONITORED = Cpanel::Chkservd::Manage::getmonitored();
            Cpanel::Chkservd::Manage::enable('postgresql') unless exists $MONITORED{'postgresql'};
        }
    }

    # install_ok value can change in the previous block
    if ( !$install_ok ) {
        print STDERR qq{The PostgreSQL installation failed!\n};
    }

    # reset haspostgres if great success
    Cpanel::ServerTasks::schedule_task( ['CpDBTasks'], 5, 'build_global_cache' ) if $install_ok;

    return $install_ok ? 0 : 1;
}

1;