该问题与以下问题有关：如何在Windows上从Perl脚本为输出文本着色？
但是更具体一些。在某种程度上，我已经可以进行跨平台的着色了：
use Term::ANSIColor;
use Win32::Console;
if (!(-f STDOUT)) {
if ($^O =~ /win/) {
our $FG_BLUE;
our $FG_YELLOW;
our $FG_RED;
our $BG_GREEN;
my $CONSOLE = Win32::Console->new(STD_OUTPUT_HANDLE);
my $attr = $CONSOLE->Attr(); # Get current console colors
$blue = sub {$CONSOLE->Attr($FG_BLUE);return};
$reset = sub {$CONSOLE->Attr($attr);return};
$yellow = sub {$CONSOLE->Attr($FG_YELLOW);return};
$red = sub {$CONSOLE->Attr($FG_RED);return};
} else {
$blue = sub {return color('bold blue')};
$reset = sub {return color('reset')};
$yellow = sub {return color('yellow')};
$red = sub {return color('red')};
}
}
但是从字符串内部调用函数时，终端颜色不会立即更改，因此：
print "${\$blue->()} this is blue\n";
print "${\$blue->()}This is... not blue${\$reset->()}\n";
print "this is Blue ${\$blue->()}\n";
print "this is reset${\$reset->()}\n";
我想知道是否可以做这样的事情：
my $print_help = <<PRINT_HELP;
Usage: $toolname [-Options] [-fields name1,[name2],...]
${\$red->()} toolname version VERSION ${\$reset->()}
${\$blue->()} options: ${\$reset->()}
PRINT_HELP
print $print_help;
打印没有颜色。我尝试设置$ | = 1，没有运气。
我没有选择在有问题的系统上安装Win32 :: Console :: ANSI，因此我无法使使用该模块的任何解决方案正常工作。
你在呼唤red，reset，blue和reset你甚至开始打印前。您可以使用模板。这是一个可靠的实现：
use FindBin qw( $RealBin );
use lib "$RealBin/lib";
use My::Console qw( );
my $console = My::Console->new;
my $print_help = <<'__END_OF_HELP__';
Usage: $toolname [-Options] [-fields name1,[name2],...]
{{red}}toolname version VERSION{{reset}}
{{blue}}options:{{reset}}
__END_OF_HELP__
$console->print_with_color($print_help);
lib/My/Console.pm：
package My::Console;
use strict;
use warnings;
my $console;
BEGIN {
if (!-t STDOUT) {
require My::Console::Dumb;
$console = My::Console::Dumb::;
}
elsif ($^O eq 'Win32') {
require My::Console::Win32;
$console = My::Console::Win32::;
}
else {
require My::Console::ANSI;
$console = My::Console::ANSI::;
}
}
sub new { $console }
1;
lib/My/Console/Base.pm：
package My::Console::Base;
use strict;
use warnings;
use Carp qw( croak );
my %allowed_cmds = map { $_ => 1 } qw( red blue reset );
sub red { }
sub blue { }
sub reset { }
sub print { print(STDOUT @_); }
sub print_with_color {
my $self = shift;
for (@_) {
/\G ( (?: [^{] | \{(?!\{) )+ ) /xgc
and $self->print($1);
/\G \z /xgc
and next;
/\G \{\{ /xgc;
/\G ( (?: [^}] | \}(?!\}) )* ) \}\} /xgc
or croak("Bad template");
my $cmd = $1;
if ($cmd eq "") {
# An escape mechanism. Use "{{}}" to output "{{".
$self->print("{{");
redo;
}
$allowed_cmds{$cmd}
or croak("Unrecognized command \"$cmd\"");
$self->$cmd();
redo;
}
}
1;
lib/My/Console/Win32.pm：
package My::Console::Win32;
use strict;
use warnings;
use My::Console::Base qw( );
use Win32::Console;
our @ISA = My::Console::Base::;
my $CONSOLE = Win32::Console->new(STD_OUTPUT_HANDLE);
my $initial_console_attr = $CONSOLE->Attr();
sub red { STDOUT->flush; $CONSOLE->Attr($FG_RED); }
sub blue { STDOUT->flush; $CONSOLE->Attr($FG_BLUE); }
sub reset { STDOUT->flush; $CONSOLE->Attr($initial_console_attr); }
1;
lib/My/Console/ANSI.pm：
package My::Console::ANSI;
use strict;
use warnings;
use My::Console::Base qw( );
use Term::ANSIColor qw( );
our @ISA = My::Console::Base::;
sub red { print(Term::ANSIColor::red()); }
sub blue { print(Term::ANSIColor::blue()); }
sub reset { print(Term::ANSIColor::reset()); }
1;
lib/My/Console/Dumb.pm：
package My::Console::Dumb;
use strict;
use warnings;
use My::Console::Base qw( );
our @ISA = My::Console::Base::;
1;
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我来说两句