X-Git-Url: http://git.shiar.nl/barcat.git/blobdiff_plain/3d2d4269158b9bddeb4c24cd4b69d5602b4b9668..a635fe75ffafbd544463f4ab569f77f5d3e49ed0:/barcat

diff --git a/barcat b/barcat
index 978a222..de3f6f8 100755
--- a/barcat
+++ b/barcat
@@ -9,10 +9,6 @@ use experimental qw( lexical_subs );
 our $VERSION = '1.05';
 
 use Getopt::Long '2.33', qw( :config gnu_getopt );
-sub podexit {
-	require Pod::Usage;
-	Pod::Usage::pod2usage(-exitval => 0, -perldocopt => '-oman', @_);
-}
 my %opt;
 GetOptions(\%opt,
 	'color|c!',
@@ -47,18 +43,42 @@ GetOptions(\%opt,
 		);
 	},
 	'markers|m=s',
+	'graph-format=s' => sub {
+		$opt{'graph-format'} = substr $_[1], 0, 1;
+	},
 	'spark:s' => sub {
 		$opt{spark} = [split //, $_[1] || '⎽▁▂▃▄▅▆▇█'];
 	},
 	'stat|s!',
 	'unmodified|u!',
 	'width|w=i',
-	'usage|h' => sub { podexit() },
-	'help'    => sub { podexit(-verbose => 2) },
+	'usage|h' => sub {
+		local $/;
+		my $pod = readline *DATA;
+		$pod =~ s/^=over\K/ 22/m;  # indent options list
+		$pod =~ s/^=item \N*\n\n\N*\n\K(?:(?:^=over.*?^=back\n)?(?!=)\N*\n)*/\n/msg;
+
+		require Pod::Usage;
+		my $parser = Pod::Usage->new;
+		$parser->select('SYNOPSIS', 'OPTIONS');
+		$parser->output_string(\my $contents);
+		$parser->parse_string_document($pod);
+
+		$contents =~ s/\n(?=\n\h)//msg;  # strip space between items
+		print $contents;
+		exit;
+	},
+	'help|?'  => sub {
+		require Pod::Usage;
+		Pod::Usage::pod2usage(
+			-exitval => 0, -perldocopt => '-oman', -verbose => 2,
+		);
+	},
 ) or exit 64;  # EX_USAGE
 
 $opt{width} ||= $ENV{COLUMNS} || 80;
 $opt{color} //= -t *STDOUT;  # enable on tty
+$opt{'graph-format'} //= '-';
 $opt{trim}   *= $opt{width} / 100 if $opt{trimpct};
 $opt{units}   = [split //, ' kMGTPEZYyzafpnμm'] if $opt{'human-readable'};
 $opt{anchor} //= qr/\A/;
@@ -67,13 +87,15 @@ $opt{'value-length'} = 1 if $opt{unmodified};
 
 my (@lines, @values, @order);
 
+$SIG{$_} = \&show_stat for exists $SIG{INFO} ? 'INFO' : 'QUIT';
+$SIG{ALRM} = sub {
+	show_lines();
+	alarm $opt{interval} if defined $opt{interval} and $opt{interval} > 0;
+};
+
 if (defined $opt{interval}) {
 	$opt{interval} ||= 1;
-	$SIG{ALRM} = sub {
-		show_lines();
-		alarm $opt{interval};
-	};
-	alarm $opt{interval};
+	alarm $opt{interval} if $opt{interval} > 0;
 
 	eval {
 		require Tie::Array::Sorted;
@@ -83,6 +105,7 @@ if (defined $opt{interval}) {
 
 $SIG{INT} = sub {
 	$SIG{INT} = 'DEFAULT';  # reset for subsequent attempts
+	exit if !$.;
 	'IGNORE' # continue after assumed eof
 };
 
@@ -96,13 +119,15 @@ while (readline) {
 		my $trimpos = abs $opt{trim};
 		$trimpos -= length $1 if $opt{unmodified};
 		if ($trimpos <= 1) {
-			$_ = substr $_, 0, 1;
+			$_ = substr $_, 0, 2;
 		}
 		elsif (length > $trimpos) {
 			substr($_, $trimpos - 1) = '…';
 		}
 	}
 	push @lines, $_;
+	show_lines() if defined $opt{interval} and $opt{interval} < 0
+		and $. % $opt{interval} == 0;
 }
 
 $SIG{INT} = 'DEFAULT';
@@ -185,7 +210,7 @@ while ($nr <= $#lines) {
 	}
 	my $line = $lines[$nr] =~ s/\n/$val/r;
 	printf '%-*s', $len + length($val), $line;
-	print $barmark[$_] // '-' for 1 .. $size && (($values[$nr] || 0) - $minval) * $size + .5;
+	print $barmark[$_] // $opt{'graph-format'} for 1 .. $size && (($values[$nr] || 0) - $minval) * $size + .5;
 	say '';
 }
 continue {
@@ -196,7 +221,7 @@ say '' if $opt{spark};
 }
 show_lines();
 
-if ($opt{stat}) {
+sub show_stat {
 	if ($opt{hidemin} or $opt{hidemax}) {
 		$opt{hidemin} ||= 1;
 		$opt{hidemax} ||= @lines;
@@ -204,13 +229,17 @@ if ($opt{stat}) {
 	}
 	if (@order) {
 		my $total = sum @order;
-		printf '%s total', $total;
+		printf '%s total', color(1) . $total . color(0);
 		printf ' in %d values', scalar @values;
-		printf ' (%s min, %*.*f avg, %s max)',
-			$order[-1], 0, 2, $total / @order, $order[0];
+		printf(' (%s min, %s avg, %s max)',
+			color(31) . $order[-1] . color(0),
+			color(36) . (sprintf '%*.*f', 0, 2, $total / @order) . color(0),
+			color(32) . $order[0] . color(0),
+		);
 	}
 	say '';
 }
+show_stat() if $opt{stat};
 
 __END__
 =encoding utf8
@@ -229,6 +258,12 @@ Visualizes relative sizes of values read from input (file(s) or STDIN).
 Contents are concatenated similar to I<cat>,
 but numbers are reformatted and a bar graph is appended to each line.
 
+Don't worry, barcat does not drink and divide.
+It can has various options for input and output (re)formatting,
+but remains limited to one-dimensional charts.
+For more complex graphing needs
+you'll need a larger animal like I<gnuplot>.
+
 =head1 OPTIONS
 
 =over
@@ -258,9 +293,10 @@ turning long numbers like I<12356789> into I<12.4M>.
 Also changes an exponent I<1.602176634e-19> to I<160.2z>.
 Short integers are aligned but kept without decimal point.
 
-=item -t, --interval[=<seconds>]
+=item -t, --interval[=(<seconds>|-<lines>)]
 
-Interval time to output partial progress.
+Output partial progress every given number of seconds or input lines.
+An update can also be forced by sending a I<SIGALRM> alarm signal.
 
 =item -l, --length=[-]<size>[%]
 
@@ -278,6 +314,11 @@ Stop output after a number of lines.
 All input is still counted and analyzed for statistics,
 but disregarded for padding and bar size.
 
+=item --graph-format=<character>
+
+Glyph to repeat for the graph line.
+Defaults to a dash C<->.
+
 =item -m, --markers=
 
 Statistical positions to indicate on bars.
@@ -329,6 +370,19 @@ Reserved space for numbers.
 Override the maximum number of columns to use.
 Appended graphics will extend to fill up the entire screen.
 
+=item -h, --usage
+
+Overview of available options.
+
+=item --help
+
+Full documentation
+rendered by perldoc.
+
+=item --version
+
+Version information.
+
 =back
 
 =head1 EXAMPLES