exit;
},
'usage|h' => sub {
- local $/ = undef; # slurp
- my $pod = readline *DATA;
- $pod =~ s/^=over\K/ 25/; # indent options list
- $pod =~ s{
- ^=item \h \N*\n\n \N*\n \K # first line
- (?: (?: ^=over .*? ^=back\n )? (?!=) \N*\n )*
- }{\n}g; # abbreviate options
- $pod =~ s/[.,](?=\n)//g; # trailing punctuation
- $pod =~ s/^=item\ \K(?=--)/____/g; # align long options
- # abbreviate <variable> indicators
- $pod =~ s/\Q>.../s>/g;
- $pod =~ s/<(?:number|count|seconds)>/N/g;
- $pod =~ s/<character(s?)>/\Uchar$1/g;
- $pod =~ s/\Q | /|/g;
- $pod =~ s/(?<!\w)<([a-z]+)>/\U$1/g; # uppercase
-
- require Pod::Usage;
- my $parser = Pod::Usage->new(USAGE_OPTIONS => {
- -indent => 2, -width => 78,
- });
- $parser->select('SYNOPSIS', 'OPTIONS');
- $parser->output_string(\my $contents);
- $parser->parse_string_document($pod);
-
- $contents =~ s/\n(?=\n\h)//msg; # strip space between items
- $contents =~ s/^\ \ \K____/ /g; # nbsp substitute
- print $contents;
+ /^=/ ? last : print for readline *DATA; # text between __END__ and pod
exit;
},
'help|?' => sub {
show_exit();
__END__
+Usage:
+ barcat [OPTIONS] [FILES|NUMBERS]
+
+Options:
+ -a, --[no-]ascii Restrict user interface to ASCII characters
+ -c, --[no-]color Force colored output of values and bar markers
+ -f, --field=(N|REGEXP) Compare values after a given number of whitespace
+ separators
+ --header Prepend a chart axis with minimum and maximum
+ values labeled
+ -H, --human-readable Format values using SI unit prefixes
+ -t, --interval[=(N|-LINES)]
+ Output partial progress every given number of
+ seconds or input lines
+ -l, --length=[-]SIZE[%] Trim line contents (between number and bars)
+ -L, --limit[=(N|-LAST|START-[END])]
+ Stop output after a number of lines
+ --graph-format=CHAR Glyph to repeat for the graph line
+ -m, --markers=FORMAT Statistical positions to indicate on bars
+ --min=N, --max=N Bars extend from 0 or the minimum value if lower
+ --palette=(PRESET|COLORS)
+ Override colors of parsed numbers
+ --spark[=CHARS] Replace lines by sparklines
+ -s, --stat Total statistics after all data
+ -u, --unmodified Do not reformat values, keeping leading whitespace
+ --value-length=SIZE Reserved space for numbers
+ -w, --width=COLUMNS Override the maximum number of columns to use
+ -h, --usage Overview of available options
+ --help Full documentation
+ --version Version information
+
=encoding utf8
=head1 NAME
--- /dev/null
+#!/usr/bin/env perl
+use 5.014;
+use warnings;
+use open qw( :std :utf8 );
+use re '/msx';
+
+our $VERSION = '1.00';
+
+local $/ = undef; # slurp
+my $source = readline;
+my $pod = $source;
+$pod =~ s/^=over\K/ 25/; # indent options list
+$pod =~ s{
+ ^=item \h \N*\n\n \N*\n \K # first line
+ (?: (?: ^=over .*? ^=back\n )? (?!=) \N*\n )*
+}{\n}g; # abbreviate options
+$pod =~ s/[.,](?=\n)//g; # trailing punctuation
+$pod =~ s/^=item\ \K(?=--)/____/g; # align long options
+# abbreviate <variable> indicators
+$pod =~ s/\Q>.../s>/g;
+$pod =~ s/<(?:number|count|seconds)>/N/g;
+$pod =~ s/<character(s?)>/\Uchar$1/g;
+$pod =~ s/\Q | /|/g;
+$pod =~ s/(?<!\w)<([a-z]+)>/\U$1/g; # uppercase
+
+require Pod::Usage;
+my $parser = Pod::Usage->new(USAGE_OPTIONS => {
+ -indent => 2, -width => 78,
+});
+$parser->select('SYNOPSIS', 'OPTIONS');
+$parser->output_string(\my $usage);
+$parser->parse_string_document($pod);
+
+$usage =~ s/\n(?=\n\h)//msg; # strip space between items
+$usage =~ s/^\ \ \K____/ /g; # nbsp substitute
+
+if ($ARGV eq '-') {
+ # custom formatted minimal usage text from pod document
+ print $usage;
+}
+elsif (open my $rewrite, '>', $ARGV) {
+ # replace perl code between program end and pod start
+ $source =~ s/^__END__\n \K .*? (?=^=)/$usage/;
+ print {$rewrite} $source;
+}