X-Git-Url: http://git.shiar.nl/barcat.git/blobdiff_plain/3f164ff5099ca9b9cb28b800cb7b228242e79b7a..2635f0b521e899b3f1b81dcd72ebfb33cf1b930b:/graph diff --git a/graph b/graph index 2de4b90..cdcb80c 100755 --- a/graph +++ b/graph @@ -1,30 +1,238 @@ #!/usr/bin/env perl use 5.014; use warnings; -use List::Util qw( max ); +use utf8; +use List::Util qw( min max sum ); +use open qw( :std :utf8 ); -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 -my $mean = ($order[$#order / 2] + $order[$#order / 2 + .5]) / 2; +use Getopt::Long '2.33', qw( :config gnu_getopt ); +sub podexit { require Pod::Usage; Pod::Usage::pod2usage(-exitval => 0, @_) } +GetOptions(\my %opt, + 'color|c!', + 'follow|f:i', + 'trim|length|l=i', + 'markers|m=s', + 'width|w=i', + 'usage|h' => sub { podexit() }, + 'help' => sub { podexit(-verbose => 2) }, +) or exit 64; # EX_USAGE -for my $nr (0 .. $#lines) { +$opt{width} ||= $ENV{COLUMNS} || 80; +$opt{color} //= -t *STDOUT; # enable on tty + +if (defined $opt{follow}) { + $opt{follow} ||= 1; + $SIG{ALRM} = sub { + show_lines(); + alarm $opt{follow}; + }; + alarm $opt{follow}; +} + +$SIG{INT} = 'IGNORE'; # continue after assumed eof + +my (@lines, @values); +while (readline) { + chomp; + push @values, s/^\h* ( -? [0-9]* (?:\.[0-9]+)? )//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, $_; +} +@lines or exit; + +$SIG{INT} = 'DEFAULT'; + +sub show_lines { + +state $nr = 0; + +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 +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]; - 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; + if (length $val) { + my $color = !$opt{color} ? 0 : + $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]; - my $bar = '-' x ($val * $size); - substr $bar, int($mean * $size) - 1, 1, "\e[36m+\e[0m" if $val >= $mean; - say $bar; + print $barmark[$_] // '-' for 1 .. $size && (($val || 0) - $minval) * $size; + say ''; + $nr++; } + +} +show_lines(); + +__END__ + +=head1 NAME + +graph - append bar chart to input numbers + +=head1 SYNOPSIS + +B [] [] + +=head1 DESCRIPTION + +Each line starting with a number is given a bar to visualise relative sizes. + +=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, --follow[=] + +Interval to output partial progress. + +=item -l, --length=[-] + +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 results, +or 68% of all entries. + +=back + +=item -w, --width= + +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 + +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 | + perl -pe '$|=1; print s/ time=(.*)// ? "$1 for " : "> "' | graph -f + +=head1 AUTHOR + +Mischa POSLAWSKY + +=head1 LICENSE + +GPL3+.