Color die and warn messages

[Anonymous Monk]

This scratched an itch for me, no guarantees.

use warnings::colored;
warn "warning";  # yellow
system "non-existant-command";  # red
say "test";  # none
eval { die "caught" };  # none
say $@;  # none
die "died";  # red

And the implementation:

package warnings::colored;
use strict;
use warnings;

use Term::ANSIColor;

# Color die and warn messages.

# NOTE: Doesn' play well with Carp::Always because it replaces our die
+ and
# warn sighandlers.

$ENV{NO_COLOR} = 1
    if ! exists $ENV{NO_COLOR} and (! -t STDIN or ! -t STDERR);

BEGIN {
    my $died;
    *CORE::GLOBAL::die = sub {
        $died = 1, print STDERR color('bold red') if @_ and ! $^S;
        END { $died && print STDERR color('reset') }
        $] >= 5.016  && goto &CORE::die;
        CORE::die @_;
    };
    *CORE::GLOBAL::warn = sub {
        unshift @_, color('bold yellow');
        # $SIG{__WARN__} will print the reset sequence.
        $] >= 5.016  && goto &CORE::warn;
        CORE::warn @_;
    };
}

# Unintentional warning messages should display with high severity.
# E.g.`system 'nonexistent-command'`.
$SIG{__WARN__} = sub {
    my $msg = shift;
    if ($] < 5.016 and __FILE__ eq (caller)[1]) {
        my ($file, $line) = (caller(1))[1, 2];
        $msg =~ s/( at .*? line \d+\.$)/ at $file line $line/m;
    }
    CORE::warn color('bold red'), $msg;
    print STDERR color('reset');
};
$SIG{__DIE__} = sub {
    my $msg = shift;
    if (__FILE__ eq (caller)[1]) {
        my ($file, $line) = (caller(1))[1, 2];
        $msg =~ s/( at .*? line \d+\.$)/ at $file line $line/m;
        die $msg;
    }
} if $] < 5.016 ;

1;

[dbuckhal]

Hey, just silly thought I had regarding your "NOTE"

# NOTE: Doesn' play well with Carp::Always because it replaces our die

Since you are colorizing, instead of "die", use "dye" to prevent clobbering.

Otherwise, cool concept!

... I really hope Anonymous Monk gets this response ...