X-Git-Url: http://git.shiar.nl/barcat.git/blobdiff_plain/cdad4c9fc575cb94974ae27e451aed47fc072710..1581d8acae9b0ed74bd4c5a696f6cdc470fe84d9:/barcat diff --git a/barcat b/barcat index 4c3cf8a..c2f41aa 100755 --- a/barcat +++ b/barcat @@ -77,7 +77,10 @@ if (defined $opt{interval}) { } or warn $@, "Expect slowdown with large datasets!\n"; } -$SIG{INT} = 'IGNORE'; # continue after assumed eof +$SIG{INT} = sub { + $SIG{INT} = 'DEFAULT'; # reset for subsequent attempts + 'IGNORE' # continue after assumed eof +}; my $valmatch = qr/$opt{anchor} ( \h* -? [0-9]* \.? [0-9]+ (?: e[+-]?[0-9]+ )? |)/x; while (readline) { @@ -85,7 +88,7 @@ while (readline) { s/^\h*// unless $opt{unmodified}; push @values, s/$valmatch/\n/ && $1; push @order, $1 if length $1; - if (defined $opt{trim}) { + if (defined $opt{trim} and defined $1) { my $trimpos = abs $opt{trim}; if ($trimpos <= 1) { $_ = substr $_, 0, 1; @@ -99,6 +102,12 @@ while (readline) { $SIG{INT} = 'DEFAULT'; +sub color { + $opt{color} and defined $_[0] or return ''; + return "\e[$_[0]m" if defined wantarray; + $_ = color(@_) . $_ . color(0) if defined; +} + sub show_lines { state $nr = $opt{hidemin} ? $opt{hidemin} - 1 : 0; @@ -124,18 +133,18 @@ if ($opt{markers} // 1 and $size > 0) { $barmark[ orderpos($#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; + color(36) for @barmark; state $lastmax = $maxval; if ($maxval > $lastmax) { print ' ' x ($lenval + $len); - printf "\e[90m" if $opt{color}; + printf color(90); printf '%-*s', ($lastmax - $minval) * $size + .5, '-' x (($values[$nr - 1] - $minval) * $size); - print "\e[92m" if $opt{color}; + print color(92); say '+' x (($maxval - $lastmax - $minval) * $size + .5); - print "\e[0m" if $opt{color}; + print color(0); $lastmax = $maxval; } } @@ -143,13 +152,12 @@ if ($opt{markers} // 1 and $size > 0) { @lines > $nr or return if $opt{hidemin}; sub sival { - my $unit = int(log($_[0]) / log(1000) - ($_[0] < 1)); - my $float = $_[0] !~ /^ (?: 0*\.)? [0-9]{1,3} $/x; - sprintf('%*.*f%*s', - $float ? 5 : 3, $float, # length and tenths - $_[0] / 1000 ** $unit, # number - $float ? 0 : 3, # unit size - $#{$opt{units}} >> 1 < abs $unit ? "e$unit" : $opt{units}->[$unit] + my $unit = int(log(abs $_[0] || 1) / log(10) - 3*($_[0] < 1) + 1e-15); + my $float = $_[0] !~ /^0*[-0-9]{1,3}$/; + sprintf('%3.*f%1s', + $float && ($unit % 3) == ($unit < 0), # tenths + $_[0] / 1000 ** int($unit/3), # number + $#{$opt{units}} * 1.5 < abs $unit ? "e$unit" : $opt{units}->[$unit/3] ); } @@ -157,12 +165,12 @@ while ($nr <= $#lines) { $nr >= $opt{hidemax} and last if defined $opt{hidemax}; my $val = $values[$nr]; if (length $val) { - my $color = !$opt{color} ? 0 : + my $color = !$opt{color} ? undef : $val == $order[0] ? 32 : # max $val == $order[-1] ? 31 : # min 90; $val = $opt{units} ? sival($val) : sprintf "%*s", $lenval, $val; - $val = "\e[${color}m$val\e[0m" if $color; + color($color) for $val; } my $line = $lines[$nr] =~ s/\n/$val/r; printf '%-*s', $len + length($val), $line; @@ -181,15 +189,18 @@ if ($opt{stat}) { $opt{hidemax} ||= @lines; printf '%s of ', sum(@values[$opt{hidemin} - 1 .. $opt{hidemax} - 1]) // 0; } - my $total = sum @order; - printf '%s total', $total; - printf ' in %d values', scalar @values; - printf ' (%s min, %*.*f avg, %s max)', - $order[-1], 0, 2, $total / @order, $order[0]; + if (@order) { + my $total = sum @order; + printf '%s total', $total; + printf ' in %d values', scalar @values; + printf ' (%s min, %*.*f avg, %s max)', + $order[-1], 0, 2, $total / @order, $order[0]; + } say ''; } __END__ +=encoding utf8 =head1 NAME @@ -309,56 +320,68 @@ Appended graphics will extend to fill up the entire screen. =head1 EXAMPLES -Commonly used after counting, such as users on the current server: +Draw a sine wave: - users | sed 's/ /\n/g' | sort | uniq -c | barcat + seq 30 | awk '{print sin($1/10)}' | barcat -Letter frequencies in text files: +Compare file sizes (with human-readable numbers): - cat /usr/share/games/fortunes/*.u8 | - perl -CO -nE 'say for grep length, split /\PL*/, uc' | - sort | uniq -c | barcat + du -d0 -b * | barcat -H -Memory usage of user processes: +Memory usage of user processes with long names truncated: ps xo %mem,pid,cmd | barcat -l40 -Sizes (in megabytes) of all root files and directories: +Monitor network latency from prefixed results: - du -d0 -m * | barcat + ping google.com | barcat -f'time=\K' -t + +Commonly used after counting, for example users on the current server: + + users | sed 's/ /\n/g' | sort | uniq -c | barcat + +Letter frequencies in text files: + + cat /usr/share/games/fortunes/*.u8 | + perl -CS -nE 'say for grep length, split /\PL*/, uc' | + sort | uniq -c | barcat Number of HTTP requests per day: cat log/access.log | cut -d\ -f4 | cut -d: -f1 | uniq -c | barcat -Any kind of database query with leading counts: +Any kind of database query with counts, preserving returned alignment: echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' | psql -t | barcat -u -Exchange rate USD/EUR history from CSV download provided by ECB: +External datasets, like movies per year: + + curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json | + perl -054 -nlE 'say if s/^"year"://' | uniq -c | barcat + +But please get I to process JSON +and replace the manual selection by C<< jq '.[].year' >>. + +Pokémon height comparison: + + curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json | + jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat + +USD/EUR exchange rate from CSV provided by the ECB: curl https://sdw.ecb.europa.eu/export.do \ -Gd 'node=SEARCHRESULTS&q=EXR.D.USD.EUR.SP00.A&exportType=csv' | grep '^[12]' | barcat -f',\K' --value-length=7 Total population history from the World Bank dataset (XML): +External datasets, like total population in XML from the World Bank: curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL | xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - | sed -r 's,,\n,g; s,(<[^>]+>)+, ,g' | barcat -f1 -H -Movies per year from prepared JSON data: - - curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json | - jq '.[].year' | uniq -c | barcat - -Pokémon height comparison: - - curl https://github.com/Biuni/PokemonGO-Pokedex/raw/master/pokedex.json | - jq -r '.pokemon[] | [.height,.num,.name] | join(" ")' | barcat - -Git statistics, such commit count by year: +And of course various Git statistics, such commit count by year: git log --pretty=%ci | cut -b-4 | uniq -c | barcat @@ -366,9 +389,11 @@ Or the top 3 most frequent authors with statistics over all: git shortlog -sn | barcat -L3 -s -Latency history: +Activity of the last days: - ping google.com | barcat -f'time=\K' -t + ( git log --pretty=%ci --since=30day | cut -b-10 + seq 0 30 | xargs -i date +%F -d-{}day ) | + sort | uniq -c | awk '$1--' | graph =head1 AUTHOR