5 use List::Util qw( min max sum );
6 use open qw( :std :utf8 );
7 use experimental qw( lexical_subs );
11 use Getopt::Long '2.33', qw( :config gnu_getopt );
14 Pod::Usage::pod2usage(-exitval => 0, -perldocopt => '-oman', @_);
19 'C' => sub { $opt{color} = 0 },
23 $opt{anchor} = /^[0-9]+$/ ? qr/(?:\S*\h+){$_}\K/ : qr/$_/;
24 } or die $@ =~ s/(?: at .+)?$/ for option $_[0]/r;
28 'trim|length|l=s' => sub {
29 my ($optname, $optval) = @_;
30 $optval =~ s/%$// and $opt{trimpct}++;
31 $optval =~ m/^-?[0-9]+$/ or die(
32 "Value \"$optval\" invalid for option $optname",
33 " (number or percentage expected)\n"
41 my ($optname, $optval) = @_;
43 ($opt{hidemin}, $opt{hidemax}) =
44 $optval =~ m/\A (?: ([0-9]+)? - )? ([0-9]+)? \z/x or die(
45 "Value \"$optval\" invalid for option limit",
53 'usage|h' => sub { podexit() },
54 'help' => sub { podexit(-verbose => 2) },
55 ) or exit 64; # EX_USAGE
57 $opt{width} ||= $ENV{COLUMNS} || 80;
58 $opt{color} //= -t *STDOUT; # enable on tty
59 $opt{trim} *= $opt{width} / 100 if $opt{trimpct};
60 $opt{units} = [split //, ' kMGTPEZYyzafpnμm'] if $opt{'human-readable'};
61 $opt{anchor} //= qr/\A/;
62 $opt{'value-length'} = 6 if $opt{units};
64 my (@lines, @values, @order);
66 if (defined $opt{interval}) {
75 require Tie::Array::Sorted;
76 tie @order, 'Tie::Array::Sorted', sub { $_[1] <=> $_[0] };
77 } or warn $@, "Expect slowdown with large datasets!\n";
80 $SIG{INT} = 'IGNORE'; # continue after assumed eof
82 my $valmatch = qr/$opt{anchor} ( \h* -? [0-9]* \.? [0-9]+ (?: e[+-]?[0-9]+ )? |)/x;
85 s/^\h*// unless $opt{unmodified};
86 push @values, s/$valmatch/\n/ && $1;
87 push @order, $1 if length $1;
88 if (defined $opt{trim}) {
89 my $trimpos = abs $opt{trim};
93 elsif (length > $trimpos) {
94 substr($_, $trimpos - 1) = '…';
100 $SIG{INT} = 'DEFAULT';
104 state $nr = $opt{hidemin} ? $opt{hidemin} - 1 : 0;
105 @lines and @lines > $nr or return;
107 @lines > $nr or return unless $opt{hidemin};
109 @order = sort { $b <=> $a } @order unless tied @order;
110 my $maxval = ($opt{hidemax} ? max grep { length } @values[0 .. $opt{hidemax} - 1] : $order[0]) // 0;
111 my $minval = min $order[-1] // (), 0;
112 my $lenval = $opt{'value-length'} // max map { length } @order;
113 my $len = defined $opt{trim} && $opt{trim} <= 0 ? -$opt{trim} + 1 :
114 max map { length $values[$_] && length $lines[$_] }
115 0 .. min $#lines, $opt{hidemax} || (); # left padding
116 my $size = ($maxval - $minval) &&
117 ($opt{width} - $lenval - $len) / ($maxval - $minval); # bar multiplication
120 if ($opt{markers} // 1 and $size > 0) {
121 my sub orderpos { (($order[$_[0]] + $order[$_[0] + .5]) / 2 - $minval) * $size }
122 $barmark[ (sum(@order) / @order - $minval) * $size ] = '='; # average
123 $barmark[ orderpos($#order * .31731) ] = '>';
124 $barmark[ orderpos($#order * .68269) ] = '<';
125 $barmark[ orderpos($#order / 2) ] = '+'; # mean
126 $barmark[ -$minval * $size ] = '|' if $minval < 0; # zero
127 defined and $opt{color} and $_ = "\e[36m$_\e[0m" for @barmark;
129 state $lastmax = $maxval;
130 if ($maxval > $lastmax) {
131 print ' ' x ($lenval + $len);
132 printf "\e[90m" if $opt{color};
134 ($lastmax - $minval) * $size + .5,
135 '-' x (($values[$nr - 1] - $minval) * $size);
136 print "\e[92m" if $opt{color};
137 say '+' x (($maxval - $lastmax - $minval) * $size + .5);
138 print "\e[0m" if $opt{color};
143 @lines > $nr or return if $opt{hidemin};
146 my $unit = int(log($_[0]) / log(1000) - ($_[0] < 1));
147 my $float = $_[0] !~ /^ (?: 0*\.)? [0-9]{1,3} $/x;
149 $float ? 5 : 3, $float, # length and tenths
150 $_[0] / 1000 ** $unit, # number
151 $float ? 0 : 3, # unit size
152 $#{$opt{units}} >> 1 < abs $unit ? "e$unit" : $opt{units}->[$unit]
156 while ($nr <= $#lines) {
157 $nr >= $opt{hidemax} and last if defined $opt{hidemax};
158 my $val = $values[$nr];
160 my $color = !$opt{color} ? 0 :
161 $val == $order[0] ? 32 : # max
162 $val == $order[-1] ? 31 : # min
164 $val = $opt{units} ? sival($val) : sprintf "%*s", $lenval, $val;
165 $val = "\e[${color}m$val\e[0m" if $color;
167 my $line = $lines[$nr] =~ s/\n/$val/r;
168 printf '%-*s', $len + length($val), $line;
169 print $barmark[$_] // '-' for 1 .. $size && (($values[$nr] || 0) - $minval) * $size + .5;
179 if ($opt{hidemin} or $opt{hidemax}) {
181 $opt{hidemax} ||= @lines;
182 printf '%s of ', sum(@values[$opt{hidemin} - 1 .. $opt{hidemax} - 1]) // 0;
185 my $total = sum @order;
186 printf '%s total', $total;
187 printf ' in %d values', scalar @values;
188 printf ' (%s min, %*.*f avg, %s max)',
189 $order[-1], 0, 2, $total / @order, $order[0];
198 barcat - graph to visualize input values
202 B<barcat> [<options>] [<input>]
206 Visualizes relative sizes of values read from input (file(s) or STDIN).
207 Contents are concatenated similar to I<cat>,
208 but numbers are reformatted and a bar graph is appended to each line.
214 =item -c, --[no-]color
216 Force colored output of values and bar markers.
217 Defaults on if output is a tty,
218 disabled otherwise such as when piped or redirected.
220 =item -f, --field=(<number>|<regexp>)
222 Compare values after a given number of whitespace separators,
223 or matching a regular expression.
225 Unspecified or I<-f0> means values are at the start of each line.
226 With I<-f1> the second word is taken instead.
227 A string can indicate the starting position of a value
228 (such as I<-f:> if preceded by colons),
229 or capture the numbers itself,
230 for example I<-f'(\d+)'> for the first digits anywhere.
232 =item -H, --human-readable
234 Format values using SI unit prefixes,
235 turning long numbers like I<12356789> into I<12.4M>.
236 Also changes an exponent I<1.602176634e-19> to I<160.2z>.
237 Short integers are aligned but kept without decimal point.
239 =item -t, --interval[=<seconds>]
241 Interval time to output partial progress.
243 =item -l, --length=[-]<size>[%]
245 Trim line contents (between number and bars)
246 to a maximum number of characters.
247 The exceeding part is replaced by an abbreviation sign,
248 unless C<--length=0>.
250 Prepend a dash (i.e. make negative) to enforce padding
251 regardless of encountered contents.
253 =item -L, --limit=(<count>|<start>-[<end>])
255 Stop output after a number of lines.
256 All input is still counted and analyzed for statistics,
257 but disregarded for padding and bar size.
261 Statistical positions to indicate on bars.
262 Cannot be customized yet,
263 only disabled by providing an empty argument.
265 Any value enables all marker characters:
272 the sum of all values divided by the number of counted lines.
277 the middle value or average between middle values.
281 Standard deviation left of the mean.
282 Only 16% of all values are lower.
286 Standard deviation right of the mean.
287 The part between B<< <--> >> encompass all I<normal> results,
288 or 68% of all entries.
294 Total statistics after all data.
296 =item -u, --unmodified
298 Do not strip leading whitespace.
299 Keep original value alignment, which may be significant in some programs.
301 =item --value-length=<size>
303 Reserved space for numbers.
305 =item -w, --width=<columns>
307 Override the maximum number of columns to use.
308 Appended graphics will extend to fill up the entire screen.
314 Commonly used after counting, such as users on the current server:
316 users | sed 's/ /\n/g' | sort | uniq -c | barcat
318 Letter frequencies in text files:
320 cat /usr/share/games/fortunes/*.u8 |
321 perl -CO -nE 'say for grep length, split /\PL*/, uc' |
322 sort | uniq -c | barcat
324 Memory usage of user processes:
326 ps xo %mem,pid,cmd | barcat -l40
328 Sizes (in megabytes) of all root files and directories:
332 Number of HTTP requests per day:
334 cat log/access.log | cut -d\ -f4 | cut -d: -f1 | uniq -c | barcat
336 Any kind of database query with leading counts:
338 echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
341 Exchange rate USD/EUR history from CSV download provided by ECB:
343 curl https://sdw.ecb.europa.eu/export.do \
344 -Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' |
345 grep '^[12]' | barcat -f',\K' --value-length=7
347 Total population history from the World Bank dataset (XML):
349 curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
350 xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - |
351 sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | barcat -f1 -H
353 Movies per year from prepared JSON data:
355 curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json |
356 jq '.[].year' | uniq -c | barcat
358 Pokémon height comparison:
360 curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json |
361 jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat
363 Git statistics, such commit count by year:
365 git log --pretty=%ci | cut -b-4 | uniq -c | barcat
367 Or the top 3 most frequent authors with statistics over all:
369 git shortlog -sn | barcat -L3 -s
373 ping google.com | barcat -f'time=\K' -t
377 Mischa POSLAWSKY <perl@shiar.org>