X-Git-Url: http://git.shiar.net/barcat.git/blobdiff_plain/f18127cced202704c0a9c13235ebc46b433012b6..6b28dcb8caa34f50a9f95e64948d6e2f697b34a7:/graph

diff --git a/graph b/graph
index c4ebd20..8bf473d 100755
--- a/graph
+++ b/graph
@@ -1,9 +1,10 @@
 #!/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';
 
@@ -12,10 +13,19 @@ sub podexit {
 	require Pod::Usage;
 	Pod::Usage::pod2usage(-exitval => 0, -perldocopt => '-oman', @_);
 }
-GetOptions(\my %opt,
+my %opt;
+GetOptions(\%opt,
 	'color|c!',
 	'follow|f:i',
-	'trim|length|l=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;
+	},
 	'markers|m=s',
 	'unmodified|u!',
 	'width|w=i',
@@ -25,6 +35,7 @@ GetOptions(\my %opt,
 
 $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;
@@ -142,7 +153,7 @@ disabled otherwise such as when piped or redirected.
 
 Interval 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.
@@ -226,6 +237,28 @@ Any kind of database query with leading counts:
     echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
     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' |
+    awk -F, '{RS="\r\n"} /^[12]/{print $2,$1}' | graph
+
+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"]' - |
+    awk -F'<[^>]+>' 'BEGIN {RS="</wb:value>"} {print $4,$2}' | graph
+
+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:
 
     git log --pretty=%ci | cut -b-4 | uniq -c | graph