#!/usr/bin/env perl
-use 5.014;
+use 5.018;
use warnings;
use utf8;
use List::Util qw( min max sum );
use open qw( :std :utf8 );
+use experimental qw( lexical_subs );
-our $VERSION = '1.00';
+our $VERSION = '1.02';
use Getopt::Long '2.33', qw( :config gnu_getopt );
-sub podexit { require Pod::Usage; Pod::Usage::pod2usage(-exitval => 0, @_) }
-GetOptions(\my %opt,
+sub podexit {
+ require Pod::Usage;
+ Pod::Usage::pod2usage(-exitval => 0, -perldocopt => '-oman', @_);
+}
+my %opt;
+GetOptions(\%opt,
'color|c!',
- 'trim|length|l=i',
+ 'C' => sub { $opt{color} = 0 },
+ 'field|f=s',
+ 'interval|t:i',
+ 'trim|length|l=s' => sub {
+ my ($optname, $optval) = @_;
+ $optval =~ s/%$// and $opt{trimpct}++;
+ $optval =~ m/^-?[0-9]+$/ or die(
+ "Value \"$optval\" invalid for option $optname",
+ " (number or percentage expected)\n"
+ );
+ $opt{trim} = $optval;
+ },
+ 'value-length=i',
'markers|m=s',
+ 'unmodified|u!',
'width|w=i',
'usage|h' => sub { podexit() },
'help' => sub { podexit(-verbose => 2) },
) or exit 64; # EX_USAGE
+
$opt{width} ||= $ENV{COLUMNS} || 80;
-$opt{color} //= 1;
-$opt{trim} //= 0;
+$opt{color} //= -t *STDOUT; # enable on tty
+$opt{trim} *= $opt{width} / 100 if $opt{trimpct};
+
+if (defined $opt{interval}) {
+ $opt{interval} ||= 1;
+ $SIG{ALRM} = sub {
+ show_lines();
+ alarm $opt{interval};
+ };
+ alarm $opt{interval};
+}
-my @lines = readline or exit;
-chomp for @lines;
-my @values = map { s/^\h* ( -? [0-9]* (?:\.[0-9]+)? )//x and $1 } @lines;
-my @order = sort { $b <=> $a } grep { length } @values;
-length > $opt{trim} + 1 and substr($_, $opt{trim}) = '…' for @lines;
+$SIG{INT} = 'IGNORE'; # continue after assumed eof
+
+my (@lines, @values);
+my $anchor = !defined $opt{field} ? qr/\A/ :
+ $opt{field} =~ /^[0-9]+$/ ? qr/(?:\S*\h+){$opt{field}}\K/ :
+ $opt{field};
+while (readline) {
+ s/\r?\n\z//;
+ s/^\h*// unless $opt{unmodified};
+ push @values, s/$anchor ( \h* -? [0-9]* \.? [0-9]+ |)/\n/x && $1;
+ if (defined $opt{trim}) {
+ my $trimpos = abs $opt{trim};
+ if ($trimpos <= 1) {
+ $_ = substr $_, 0, 1;
+ }
+ elsif (length > $trimpos) {
+ substr($_, $trimpos - 1) = '…';
+ }
+ }
+ push @lines, $_;
+}
+
+$SIG{INT} = 'DEFAULT';
+
+sub show_lines {
+state $nr = 0;
+@lines and @lines > $nr or return;
+
+my @order = sort { $b <=> $a } grep { length } @values;
my $maxval = $order[0];
my $minval = min $order[-1], 0;
-my $lenval = max map { length } @order;
-my $len = $opt{trim} ? $opt{trim} + 2 :
- 1 + max map { length } @lines; # left padding
+my $lenval = $opt{'value-length'} // max map { length } @order;
+my $len = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
+ max map { length $values[$_] && length $lines[$_] } 0 .. $#lines; # left padding
my $size = ($maxval - $minval) &&
($opt{width} - $lenval - $len) / ($maxval - $minval); # bar multiplication
my @barmark;
-if ($opt{markers} // 1) {
- sub orderpos { (($order[$_[0]] + $order[$_[0] + .5]) / 2 - $minval) * $size }
+if ($opt{markers} // 1 and $size > 0) {
+ my sub orderpos { (($order[$_[0]] + $order[$_[0] + .5]) / 2 - $minval) * $size }
$barmark[ (sum(@order) / @order - $minval) * $size ] = '='; # average
+ $barmark[ orderpos($#order * .31731) ] = '>';
+ $barmark[ orderpos($#order * .68269) ] = '<';
$barmark[ orderpos($#order / 2) ] = '+'; # mean
$barmark[ -$minval * $size ] = '|' if $minval < 0; # zero
defined and $opt{color} and $_ = "\e[36m$_\e[0m" for @barmark;
+
+ state $lastmax = $maxval;
+ if ($maxval > $lastmax) {
+ print ' ' x ($lenval + $len);
+ printf "\e[90m" if $opt{color};
+ printf '%-*s',
+ ($lastmax - $minval) * $size + .5,
+ '-' x (($values[$nr - 1] - $minval) * $size);
+ print "\e[92m" if $opt{color};
+ say '+' x (($maxval - $lastmax - $minval) * $size + .5);
+ print "\e[0m" if $opt{color};
+ $lastmax = $maxval;
+ }
}
-for my $nr (0 .. $#lines) {
+while ($nr <= $#lines) {
my $val = $values[$nr];
if (length $val) {
my $color = !$opt{color} ? 0 :
$val == $order[0] ? 32 : # max
$val == $order[-1] ? 31 : # min
90;
- printf "\e[%sm", $color if $color;
- printf "%*s", $lenval, $val;
- print "\e[0m" if $color;
+ $val = sprintf "%*s", $lenval, $val;
+ $val = "\e[${color}m$val\e[0m" if $color;
}
- printf '%-*s', $len, $lines[$nr];
- print $barmark[$_] // '-' for 1 .. (($val || 0) - $minval) * $size;
+ my $line = $lines[$nr] =~ s/\n/$val/r;
+ printf '%-*s', $len + length($val), $line;
+ print $barmark[$_] // '-' for 1 .. $size && (($values[$nr] || 0) - $minval) * $size;
say '';
+ $nr++;
}
+}
+show_lines();
+
__END__
=head1 NAME
=head1 DESCRIPTION
-Each line starting with a number is given a bar to visualise relative sizes.
+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.
=head1 OPTIONS
=over
-=item --no-color
+=item -c, --[no-]color
+
+Force colored output of values and bar markers.
+Defaults on if output is a tty,
+disabled otherwise such as when piped or redirected.
+
+=item -f, --field=(<number>|<regexp>)
+
+Compare values after a given number of whitespace separators,
+or matching a regular expression.
+
+Unspecified or I<-f0> means values are at the start of each line.
+With I<-f1> the second word is taken instead.
+A string can indicate the starting position of a value
+(such as I<-f:> if preceded by colons),
+or capture the numbers itself,
+for example I<-f'(\d+)'> for the first digits anywhere.
+
+=item -t, --interval[=<seconds>]
-Disable colored output of values and bar markers.
+Interval time to output partial progress.
-=item -l, --length=<size>
+=item -l, --length=[-]<size>[%]
Trim line contents (between number and bars)
to a maximum number of characters.
-The exceeding part is replaced by an abbreviation sign.
+The exceeding part is replaced by an abbreviation sign,
+unless C<--length=0>.
+
+Prepend a dash (i.e. make negative) to enforce padding
+regardless of encountered contents.
=item -m, --markers=
=item B<+>
-Median:
+Mean, median:
the middle value or average between middle values.
+=item B<<>
+
+Standard deviation left of the mean.
+Only 16% of all values are lower.
+
+=item B<< > >>
+
+Standard deviation right of the mean.
+The part between B<< <--> >> encompass all I<normal> results,
+or 68% of all entries.
+
=back
+=item -u, --unmodified
+
+Do not strip leading whitespace.
+Keep original value alignment, which may be significant in some programs.
+
+=item --value-length=<size>
+
+Reserved space for numbers.
+
=item -w, --width=<columns>
Override the maximum number of columns to use.
Any kind of database query with leading counts:
echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
- psql -t | graph
+ psql -t | graph -u
+
+Exchange rate USD/EUR history from CSV download provided by ECB:
+
+ curl https://sdw.ecb.europa.eu/export.do \
+ -Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' |
+ grep '^[12]' | graph -f',\K' --value-length=7
+
+Total population history from the World Bank dataset (XML):
+
+ curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
+ xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - |
+ sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | graph -f1
+
+Movies per year from prepared JSON data:
+
+ curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json |
+ jq '.[].year' | uniq -c | graph
+
+Pokémon height comparison:
+
+ curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json |
+ jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | graph
Git statistics, such commit count by year:
git shortlog -sn | graph | head -3
+Latency history:
+
+ ping google.com | graph -f'time=\K' -t
+
=head1 AUTHOR
Mischa POSLAWSKY <perl@shiar.org>
git.shiar.nl / barcat.git / blobdiff