#!/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 { $opt{color} = 0 },
+ 'field|f=s',
+ 'interval|t:i',
+ 'trim|length|l=s' => sub {
+ my ($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) },
$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);
+my $anchor = !defined $opt{field} ? qr/\A/ :
+ $opt{field} =~ /^[0-9]+$/ ? qr/(?:\S*\h+){$opt{field}}\K/ :
+ $opt{field};
while (readline) {
- chomp;
- push @values, s/^\h* ( -? [0-9]* (?:\.[0-9]+)? )//x && $1;
+ s/\r?\n\z//;
+ s/^\h*// unless $opt{unmodified};
+ push @values, s/$anchor ( \h* -? [0-9]* \.? [0-9]+ |)/\n/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 $lenval = $opt{'value-length'} // max map { length } @order;
my $len = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
- 1 + max map { length } @lines; # left padding
+ max map { length $values[$_] && length $lines[$_] } 0 .. $#lines; # left padding
my $size = ($maxval - $minval) &&
($opt{width} - $lenval - $len) / ($maxval - $minval); # bar multiplication
$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 .. $size && (($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++;
}
=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
Defaults on if output is a tty,
disabled otherwise such as when piped or redirected.
-=item -f, --follow[=<seconds>]
+=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 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 --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:
Latency history:
- ping google.com |
- perl -pe '$|=1; print s/ time=(.*)// ? "$1 for " : "> "' | graph -f
+ ping google.com | graph -f'time=\K' -t
=head1 AUTHOR
git.shiar.nl / barcat.git / blobdiff