#!/usr/bin/env perl
-use 5.014;
+use 5.018;
use warnings;
-use List::Util qw( max );
+use utf8;
+use List::Util qw( min max sum );
+use open qw( :std :utf8 );
+use experimental qw( lexical_subs );
-my $width = $ENV{COLUMNS} || 80;
+our $VERSION = '1.02';
-my @lines = readline;
-chomp for @lines;
-my @values = map { s/^\h*([0-9]*)// and $1 } @lines;
-my @order = sort { $b <=> $a } @values;
-my $lenval = 1 + int log($order[0]) / log 10; # max string length
-my $len = 1 + max map { length } @lines; # left padding
-my $size = ($width - $lenval - $len) / $order[0]; # bar multiplication
+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!',
+ '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} //= -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 $opt{interval};
+}
+
+$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 = $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 - $minval); # bar multiplication
-sub orderpos { ($order[$_[0]] + $order[$_[0] + .5]) / 2 * $size }
my @barmark;
-$barmark[ orderpos($#order / 2) ] = '+'; # mean
+if ($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;
-for my $nr (0 .. $#lines) {
+ 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 = $maxval;
+ }
+}
+
+while ($nr <= $#lines) {
my $val = $values[$nr];
- my $color =
- $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;
- printf '%-*s', $len, $lines[$nr];
- print $barmark[$_] // '-' for 1 .. $val * $size;
+ if (length $val) {
+ my $color = !$opt{color} ? 0 :
+ $val == $order[0] ? 32 : # max
+ $val == $order[-1] ? 31 : # min
+ 90;
+ $val = sprintf "%*s", $lenval, $val;
+ $val = "\e[${color}m$val\e[0m" if $color;
+ }
+ 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
+
+graph - append bar chart to input numbers
+
+=head1 SYNOPSIS
+
+B<graph> [<options>] [<input>]
+
+=head1 DESCRIPTION
+
+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 -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>]
+
+Interval time to output partial progress.
+
+=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,
+unless C<--length=0>.
+
+Prepend a dash (i.e. make negative) to enforce padding
+regardless of encountered contents.
+
+=item -m, --markers=
+
+Statistical positions to indicate on bars.
+Cannot be customized yet,
+only disabled by providing an empty argument.
+
+Any value enables all marker characters:
+
+=over 2
+
+=item B<=>
+
+Average:
+the sum of all values divided by the number of counted lines.
+
+=item B<+>
+
+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.
+Appended graphics will extend to fill up the entire screen.
+
+=back
+
+=head1 EXAMPLES
+
+Commonly used after counting, such as users on the current server:
+
+ users | sed 's/ /\n/g' | sort | uniq -c | graph
+
+Letter frequencies in text files:
+
+ cat /usr/share/games/fortunes/*.u8 |
+ perl -CO -nE 'say for grep length, split /\PL*/, uc' |
+ sort | uniq -c | graph
+
+Memory usage of user processes:
+
+ ps xo %mem,pid,cmd | graph -l40
+
+Sizes (in megabytes) of all root files and directories:
+
+ du -d0 -m * | graph
+
+Number of HTTP requests per day:
+
+ cat log/access.log | cut -d\ -f4 | cut -d: -f1 | uniq -c | graph
+
+Any kind of database query with leading counts:
+
+ echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
+ 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 log --pretty=%ci | cut -b-4 | uniq -c | graph
+
+Or the most frequent authors:
+
+ git shortlog -sn | graph | head -3
+
+Latency history:
+
+ ping google.com | graph -f'time=\K' -t
+
+=head1 AUTHOR
+
+Mischa POSLAWSKY <perl@shiar.org>
+
+=head1 LICENSE
+
+GPL3+.
git.shiar.nl / barcat.git / blobdiff