File Coverage

lib/Rex/Hook/File/Diff.pm

Criterion	Covered	Total	%
statement	39	42	92.8
branch	9	12	75.0
condition	1	3	33.3
subroutine	9	9	100.0
pod	0	2	0.0
total	58	68	85.2

package Rex::Hook::File::Diff;

# ABSTRACT: show diff of changes for files managed by Rex

use 5.012;
use warnings;

use File::Basename;
use Rex 1.013004 -base;
use Rex::Helper::Run;
use Rex::Hook;
use Text::Diff 1.44;

our $VERSION = 'v0.3.0.4'; # TRIAL

register_function_hooks { before_change => { file => \&show_diff, }, };

sub show_diff {
    my ( $original_file, @opts ) = @_;

    my $diff;
    my $diff_command = can_run('diff');
    state $managing_windows = is_windows();

    if ( !$managing_windows && $diff_command ) {
        my $command = join q( ), $diff_command, '-u', involved_files($original_file);

        if ( $diff = i_run $command, fail_ok => TRUE ) {
            $diff .= "\n";
        }
    }
    elsif ( Rex::is_local() ) {
        $diff = diff( involved_files($original_file) );
    }
    else {
        Rex::Logger::debug(
            'Skipping File::Diff hook due to remote operation without the diff utility');
        return;
    }

    if ( length $diff > 0 ) {
        Rex::Commands::say("Diff for: $original_file\n$diff");
    }

    return;
}

sub involved_files {
    my $file = shift;

    my $temp_file = Rex::Commands::File::get_tmp_file_name($file);
    my $null      = File::Spec->devnull();

    if ( !is_file($file) )      { $file      = $null } # creating file
    if ( !is_file($temp_file) ) { $temp_file = $null } # removing file

    return ( $file, $temp_file );
}

1;

__END__