Hi,

This was bad news indeed, because I don't really like the idea of redefining (parts of) Log::Log4perl (or Log::Log4perl::Tiny, as per clueless newbie's suggestion). But your reply made me take a closer look at the information available to cspec callbacks, and I was able to snatch good news from the jaws of the bad news: although the callbacks don't get %info, they do get $caller_level, using which I can get at filename and line number on my own (duplicating Log::Log4perl's work a bit). After some experimenting, I came up with a complete solution.

In log4perl.conf, I say:

log4perl.PatternLayout.cspec.S = sub { '    ' x level_for_l4p(); }
log4perl.PatternLayout.cspec.A = sub { msgpfx_for_l4p( @_ ); }
log4perl.appender.std.layout.ConversionPattern  = %-32A%S%m%n

[download]

And in the main program:

my $zerolevel = 8;
sub level_for_l4p {
    my $level = 0;
    1 while caller( $level++ );
    return $level - $zerolevel;
}
sub msgpfx_for_l4p {
    my ( $l, $m, $c, $p, $caller_level ) = @_;
    my ( $unused, $filename, $line, @unused ) =
        caller( $caller_level + 1 );
    return "$filename:$line:";
}
Log::Log4perl::init('log4perl.conf');

[download]

This setup produces the exact output I wished for and described near the end of my initial message, making me happy again.

Thanks and regards,
T.

In reply to Re^2: Log::Log4perl::Layout::PatternLayout: setting combined length for two fields? by toomas
in thread Log::Log4perl::Layout::PatternLayout: setting combined length for two fields? by toomas

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