#!/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 = '1.02';
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!',
- 'follow|f:i',
- 'trim|length|l=i',
+ 'C' => sub { $opt{color} = 0 },
+ 'interval|t:i',
+ 'trim|length|l=s' => sub {
+ my ($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;
+ },
'markers|m=s',
+ 'unmodified|u!',
'width|w=i',
'usage|h' => sub { podexit() },
'help' => sub { podexit(-verbose => 2) },
$opt{width} ||= $ENV{COLUMNS} || 80;
$opt{color} //= -t *STDOUT; # enable on tty
+$opt{trim} *= $opt{width} / 100 if $opt{trimpct};
-if (defined $opt{follow}) {
- $opt{follow} ||= 1;
+if (defined $opt{interval}) {
+ $opt{interval} ||= 1;
$SIG{ALRM} = sub {
show_lines();
- alarm $opt{follow};
+ alarm $opt{interval};
};
- alarm $opt{follow};
+ alarm $opt{interval};
}
+$SIG{INT} = 'IGNORE'; # continue after assumed eof
+
my (@lines, @values);
while (readline) {
- chomp;
- push @values, s/^\h* ( -? [0-9]* (?:\.[0-9]+)? )//x && $1;
+ s/\r?\n\z//;
+ s/^\h*// unless $opt{unmodified};
+ push @values, s/^ ( \h* -? [0-9]* \.? [0-9]+ |)//x && $1;
if (defined $opt{trim}) {
my $trimpos = abs $opt{trim};
if ($trimpos <= 1) {
}
push @lines, $_;
}
-@lines or exit;
+
+$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 = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
- 1 + max map { length } @lines; # left padding
+ 1 + max map { length $values[$_] && length $lines[$_] } 0 .. $#lines; # left padding
my $size = ($maxval - $minval) &&
($opt{width} - $lenval - $len) / ($maxval - $minval); # bar multiplication
$barmark[ orderpos($#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;
+ }
}
-state $nr = 0;
while ($nr <= $#lines) {
my $val = $values[$nr];
if (length $val) {
Defaults on if output is a tty,
disabled otherwise such as when piped or redirected.
-=item -f, --follow[=<seconds>]
+=item -t, --interval[=<seconds>]
-Interval to output partial progress.
+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.
=back
+=item -u, --unmodified
+
+Do not strip leading whitespace.
+Keep original value alignment, which may be significant in some programs.
+
=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' |
+ awk -F, '{RS="\r\n"} /^[12]/{print $2,$1}' | graph
+
+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"]' - |
+ awk -F'<[^>]+>' 'BEGIN {RS="</wb:value>"} {print $4,$2}' | graph
+
+Movies per year from prepared JSON data:
+
+ curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json |
+ jq '.[].year' | uniq -c | graph
+
+Pokémon height comparison:
+
+ curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json |
+ jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | graph
Git statistics, such commit count by year:
Latency history:
ping google.com |
- perl -pe '$|=1; print s/ time=(.*)// ? "$1 for " : "> "' | graph -f
+ perl -pe '$|=1; print s/ time=(.*)// ? "$1 for " : "> "' | graph -t
=head1 AUTHOR