+++ /dev/null
-#!/usr/bin/env perl
-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 = '1.02';
-
-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 - $minval); # bar multiplication
-
-my @barmark;
-if ($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 = $maxval;
- }
-}
-
-while ($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;
- $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 + .5;
- 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