rotate sparkless indicators default

[barcat.git] / barcat

diff --git a/barcat b/barcat
index b65271e303c9f826470605ecba636708564fb420..2339bc7e2b8ed8dc8b604ec06e10ed557f9ebcfe 100755 (executable)
--- a/barcat
+++ b/barcat
@@ -58,18 +58,23 @@ GetOptions(\%opt,
        'palette=s' => sub {
                $opt{palette} = {
                        fire   => [qw( 90 31 91 33 93 97 96 )],
-                       fire88 => [map {"38;5;$_"} qw(
-                               80  32 48 64  68 72 76  77 78 79  47
-                       )],
                        fire256=> [map {"38;5;$_"} qw(
                                235  52 88 124 160 196
                                202 208 214 220 226  227 228 229 230 231  159
                        )],
-                       ramp88 => [map {"38;5;$_"} qw(
-                               64 65 66 67 51 35 39 23 22 26 25 28
-                       )],
                        whites => [qw( 1;30 0;37 1;37 )],
-                       greys  => [map {"38;5;$_"} 52, 235..255, 47],
+                       greys  => [map {"38;5;$_"} 0, 232..255, 15],
+                       random => [map {"38;5;$_"} List::Util::shuffle(17..231)],
+                       rainbow=> [map {"38;5;$_"}
+                               196, # r
+                               (map { 196 + $_*6   } 0..4), # +g
+                               (map { 226 - $_*6*6 } 0..4), # -r
+                               (map {  46 + $_     } 0..4), # +b
+                               (map {  51 - $_*6   } 0..4), # -g
+                               (map {  21 + $_*6*6 } 0..4), # +r
+                               (map { 201 - $_     } 0..4), # -b
+                               196,
+                       ],
                }->{$_[1]} // [ split /[^0-9;]/, $_[1] ];
        },
        'stat|s!',
@@ -106,8 +111,8 @@ $opt{'value-length'} = 1 if $opt{unmodified};
 $opt{'signal-stat'} //= exists $SIG{INFO} ? 'INFO' : 'QUIT';
 $opt{markers} //= '=avg >31.73v <68.27v +50v |0';
 $opt{palette} //= $opt{color} && [31, 90, 32];
-$opt{indicators} = [split //,
-       $opt{indicators} || ($opt{ascii} ? ' .oO' : ' ▁▂▃▄▅▆▇█')
+$opt{indicators} = [split //, $opt{indicators} ||
+       ($opt{ascii} ? ' .oO' : $opt{spark} ? ' ▁▂▃▄▅▆▇█' : ' ▏▎▍▌▋▊▉█')
 ] if defined $opt{indicators} or $opt{spark};
 $opt{hidemin} = ($opt{hidemin} || 1) - 1;
 $opt{input} = (@ARGV && $ARGV[0] =~ m/\A[-0-9]/) ? \@ARGV : undef
@@ -194,7 +199,7 @@ sub color {
 sub show_lines {
 
 state $nr =
-       $opt{hidemin} < 0 ? @lines + $opt{hidemin} + 1 :
+       $opt{hidemin} < 0 ? max(0, @lines + $opt{hidemin} + 1) :
        $opt{hidemin};
 @lines > $nr or return;
 
@@ -203,7 +208,7 @@ if (defined $opt{hidemax}) {
        if ($opt{hidemin} and $opt{hidemin} < 0) {
                $limit -= $opt{hidemax} - 1;
        }
-       else {
+       elsif ($opt{hidemax} <= $limit) {
                $limit = $opt{hidemax} - 1;
        }
 }
@@ -589,7 +594,7 @@ Compare file sizes (with human-readable numbers):
 
 Memory usage of user processes with long names truncated:
 
-    ps xo %mem,pid,cmd | barcat -l40
+    ps xo rss,pid,cmd | barcat -l40
 
 Monitor network latency from prefixed results:
 
@@ -607,7 +612,7 @@ Letter frequencies in text files:
 
 Number of HTTP requests per day:
 
-    cat log/access.log | cut -d\  -f4 | cut -d: -f1 | uniq -c | barcat
+    cat httpd/access.log | cut -d\  -f4 | cut -d: -f1 | uniq -c | barcat
 
 Any kind of database query with counts, preserving returned alignment:
 
@@ -616,7 +621,7 @@ Any kind of database query with counts, preserving returned alignment:
 
 In PostgreSQL from within the client:
 
-       postgres=> SELECT sin(generate_series(0, 3, .1)) \g |barcat
+    > SELECT sin(generate_series(0, 3, .1)) \g |barcat
 
 Earthquakes worldwide magnitude 1+ in the last 24 hours:
 
@@ -626,10 +631,7 @@ Earthquakes worldwide magnitude 1+ in the last 24 hours:
 External datasets, like movies per year:
 
     curl https://github.com/prust/wikipedia-movie-data/raw/master/movies.json -L |
-    perl -054 -nlE 'say if s/^"year"://' | uniq -c | barcat
-
-But please get I<jq> to process JSON
-and replace the manual selection by C<< jq '.[].year' >>.
+    jq .[].year | uniq -c | barcat
 
 Pokémon height comparison:
 
@@ -640,13 +642,13 @@ 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
+    barcat -f',\K' --value-length=7
 
 Total population history in XML from the World Bank:
 
-    curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL -L |
-    xmllint --xpath '//*[local-name()="date" or local-name()="value"]' - |
-    sed -r 's,</wb:value>,\n,g; s,(<[^>]+>)+, ,g' | barcat -f1 -H
+    curl http://api.worldbank.org/v2/country/1W/indicator/SP.POP.TOTL |
+    xmlstarlet sel -t -m '*/*' -v wb:date -o ' ' -v wb:value -n |
+    barcat -f1 -H
 
 And of course various Git statistics, such commit count by year:
 
@@ -666,6 +668,10 @@ Sparkline graphics of simple input given as inline parameters:
 
     barcat -_ 3 1 4 1 5 0 9 2 4
 
+Misusing the spark functionality to draw a lolcat line:
+
+    seq $(tput cols) | barcat --spark --indicator=- --palette=rainbow
+
 =head1 AUTHOR
 
 Mischa POSLAWSKY <perl@shiar.org>