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mk-loadavg
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#!/usr/bin/env perl
# This is mk-loadavg, a program to measure the load on a MySQL server and take
# action when it exceeds boundaries.
#
# This program is copyright 2008-2011 Baron Schwartz.
# Feedback and improvements are welcome.
#
# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
# systems, you can issue `man perlgpl' or `man perlartistic' to read these
# licenses.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA.
use strict;
use warnings FATAL => 'all';
our $VERSION = '0.9.7';
our $DISTRIB = '7540';
our $SVN_REV = sprintf("%d", (q$Revision: 7460 $ =~ m/(\d+)/g, 0));
# ###########################################################################
# OptionParser package 7102
# This package is a copy without comments from the original. The original
# with comments and its test file can be found in the SVN repository at,
# trunk/common/OptionParser.pm
# trunk/common/t/OptionParser.t
# See http://code.google.com/p/maatkit/wiki/Developers for more information.
# ###########################################################################
package OptionParser;
use strict;
use warnings FATAL => 'all';
use List::Util qw(max);
use English qw(-no_match_vars);
use constant MKDEBUG => $ENV{MKDEBUG} || 0;
use Getopt::Long;
my $POD_link_re = '[LC]<"?([^">]+)"?>';
sub new {
my ( $class, %args ) = @_;
my @required_args = qw();
foreach my $arg ( @required_args ) {
die "I need a $arg argument" unless $args{$arg};
}
my ($program_name) = $PROGRAM_NAME =~ m/([.A-Za-z-]+)$/;
$program_name ||= $PROGRAM_NAME;
my $home = $ENV{HOME} || $ENV{HOMEPATH} || $ENV{USERPROFILE} || '.';
my %attributes = (
'type' => 1,
'short form' => 1,
'group' => 1,
'default' => 1,
'cumulative' => 1,
'negatable' => 1,
);
my $self = {
head1 => 'OPTIONS', # These args are used internally
skip_rules => 0, # to instantiate another Option-
item => '--(.*)', # Parser obj that parses the
attributes => \%attributes, # DSN OPTIONS section. Tools
parse_attributes => \&_parse_attribs, # don't tinker with these args.
%args,
strict => 1, # disabled by a special rule
program_name => $program_name,
opts => {},
got_opts => 0,
short_opts => {},
defaults => {},
groups => {},
allowed_groups => {},
errors => [],
rules => [], # desc of rules for --help
mutex => [], # rule: opts are mutually exclusive
atleast1 => [], # rule: at least one opt is required
disables => {}, # rule: opt disables other opts
defaults_to => {}, # rule: opt defaults to value of other opt
DSNParser => undef,
default_files => [
"/etc/maatkit/maatkit.conf",
"/etc/maatkit/$program_name.conf",
"$home/.maatkit.conf",
"$home/.$program_name.conf",
],
types => {
string => 's', # standard Getopt type
int => 'i', # standard Getopt type
float => 'f', # standard Getopt type
Hash => 'H', # hash, formed from a comma-separated list
hash => 'h', # hash as above, but only if a value is given
Array => 'A', # array, similar to Hash
array => 'a', # array, similar to hash
DSN => 'd', # DSN
size => 'z', # size with kMG suffix (powers of 2^10)
time => 'm', # time, with an optional suffix of s/h/m/d
},
};
return bless $self, $class;
}
sub get_specs {
my ( $self, $file ) = @_;
$file ||= $self->{file} || __FILE__;
my @specs = $self->_pod_to_specs($file);
$self->_parse_specs(@specs);
open my $fh, "<", $file or die "Cannot open $file: $OS_ERROR";
my $contents = do { local $/ = undef; <$fh> };
close $fh;
if ( $contents =~ m/^=head1 DSN OPTIONS/m ) {
MKDEBUG && _d('Parsing DSN OPTIONS');
my $dsn_attribs = {
dsn => 1,
copy => 1,
};
my $parse_dsn_attribs = sub {
my ( $self, $option, $attribs ) = @_;
map {
my $val = $attribs->{$_};
if ( $val ) {
$val = $val eq 'yes' ? 1
: $val eq 'no' ? 0
: $val;
$attribs->{$_} = $val;
}
} keys %$attribs;
return {
key => $option,
%$attribs,
};
};
my $dsn_o = new OptionParser(
description => 'DSN OPTIONS',
head1 => 'DSN OPTIONS',
dsn => 0, # XXX don't infinitely recurse!
item => '\* (.)', # key opts are a single character
skip_rules => 1, # no rules before opts
attributes => $dsn_attribs,
parse_attributes => $parse_dsn_attribs,
);
my @dsn_opts = map {
my $opts = {
key => $_->{spec}->{key},
dsn => $_->{spec}->{dsn},
copy => $_->{spec}->{copy},
desc => $_->{desc},
};
$opts;
} $dsn_o->_pod_to_specs($file);
$self->{DSNParser} = DSNParser->new(opts => \@dsn_opts);
}
return;
}
sub DSNParser {
my ( $self ) = @_;
return $self->{DSNParser};
};
sub get_defaults_files {
my ( $self ) = @_;
return @{$self->{default_files}};
}
sub _pod_to_specs {
my ( $self, $file ) = @_;
$file ||= $self->{file} || __FILE__;
open my $fh, '<', $file or die "Cannot open $file: $OS_ERROR";
my @specs = ();
my @rules = ();
my $para;
local $INPUT_RECORD_SEPARATOR = '';
while ( $para = <$fh> ) {
next unless $para =~ m/^=head1 $self->{head1}/;
last;
}
while ( $para = <$fh> ) {
last if $para =~ m/^=over/;
next if $self->{skip_rules};
chomp $para;
$para =~ s/\s+/ /g;
$para =~ s/$POD_link_re/$1/go;
MKDEBUG && _d('Option rule:', $para);
push @rules, $para;
}
die "POD has no $self->{head1} section" unless $para;
do {
if ( my ($option) = $para =~ m/^=item $self->{item}/ ) {
chomp $para;
MKDEBUG && _d($para);
my %attribs;
$para = <$fh>; # read next paragraph, possibly attributes
if ( $para =~ m/: / ) { # attributes
$para =~ s/\s+\Z//g;
%attribs = map {
my ( $attrib, $val) = split(/: /, $_);
die "Unrecognized attribute for --$option: $attrib"
unless $self->{attributes}->{$attrib};
($attrib, $val);
} split(/; /, $para);
if ( $attribs{'short form'} ) {
$attribs{'short form'} =~ s/-//;
}
$para = <$fh>; # read next paragraph, probably short help desc
}
else {
MKDEBUG && _d('Option has no attributes');
}
$para =~ s/\s+\Z//g;
$para =~ s/\s+/ /g;
$para =~ s/$POD_link_re/$1/go;
$para =~ s/\.(?:\n.*| [A-Z].*|\Z)//s;
MKDEBUG && _d('Short help:', $para);
die "No description after option spec $option" if $para =~ m/^=item/;
if ( my ($base_option) = $option =~ m/^\[no\](.*)/ ) {
$option = $base_option;
$attribs{'negatable'} = 1;
}
push @specs, {
spec => $self->{parse_attributes}->($self, $option, \%attribs),
desc => $para
. (defined $attribs{default} ? " (default $attribs{default})" : ''),
group => ($attribs{'group'} ? $attribs{'group'} : 'default'),
};
}
while ( $para = <$fh> ) {
last unless $para;
if ( $para =~ m/^=head1/ ) {
$para = undef; # Can't 'last' out of a do {} block.
last;
}
last if $para =~ m/^=item /;
}
} while ( $para );
die "No valid specs in $self->{head1}" unless @specs;
close $fh;
return @specs, @rules;
}
sub _parse_specs {
my ( $self, @specs ) = @_;
my %disables; # special rule that requires deferred checking
foreach my $opt ( @specs ) {
if ( ref $opt ) { # It's an option spec, not a rule.
MKDEBUG && _d('Parsing opt spec:',
map { ($_, '=>', $opt->{$_}) } keys %$opt);
my ( $long, $short ) = $opt->{spec} =~ m/^([\w-]+)(?:\|([^!+=]*))?/;
if ( !$long ) {
die "Cannot parse long option from spec $opt->{spec}";
}
$opt->{long} = $long;
die "Duplicate long option --$long" if exists $self->{opts}->{$long};
$self->{opts}->{$long} = $opt;
if ( length $long == 1 ) {
MKDEBUG && _d('Long opt', $long, 'looks like short opt');
$self->{short_opts}->{$long} = $long;
}
if ( $short ) {
die "Duplicate short option -$short"
if exists $self->{short_opts}->{$short};
$self->{short_opts}->{$short} = $long;
$opt->{short} = $short;
}
else {
$opt->{short} = undef;
}
$opt->{is_negatable} = $opt->{spec} =~ m/!/ ? 1 : 0;
$opt->{is_cumulative} = $opt->{spec} =~ m/\+/ ? 1 : 0;
$opt->{is_required} = $opt->{desc} =~ m/required/ ? 1 : 0;
$opt->{group} ||= 'default';
$self->{groups}->{ $opt->{group} }->{$long} = 1;
$opt->{value} = undef;
$opt->{got} = 0;
my ( $type ) = $opt->{spec} =~ m/=(.)/;
$opt->{type} = $type;
MKDEBUG && _d($long, 'type:', $type);
$opt->{spec} =~ s/=./=s/ if ( $type && $type =~ m/[HhAadzm]/ );
if ( (my ($def) = $opt->{desc} =~ m/default\b(?: ([^)]+))?/) ) {
$self->{defaults}->{$long} = defined $def ? $def : 1;
MKDEBUG && _d($long, 'default:', $def);
}
if ( $long eq 'config' ) {
$self->{defaults}->{$long} = join(',', $self->get_defaults_files());
}
if ( (my ($dis) = $opt->{desc} =~ m/(disables .*)/) ) {
$disables{$long} = $dis;
MKDEBUG && _d('Deferring check of disables rule for', $opt, $dis);
}
$self->{opts}->{$long} = $opt;
}
else { # It's an option rule, not a spec.
MKDEBUG && _d('Parsing rule:', $opt);
push @{$self->{rules}}, $opt;
my @participants = $self->_get_participants($opt);
my $rule_ok = 0;
if ( $opt =~ m/mutually exclusive|one and only one/ ) {
$rule_ok = 1;
push @{$self->{mutex}}, \@participants;
MKDEBUG && _d(@participants, 'are mutually exclusive');
}
if ( $opt =~ m/at least one|one and only one/ ) {
$rule_ok = 1;
push @{$self->{atleast1}}, \@participants;
MKDEBUG && _d(@participants, 'require at least one');
}
if ( $opt =~ m/default to/ ) {
$rule_ok = 1;
$self->{defaults_to}->{$participants[0]} = $participants[1];
MKDEBUG && _d($participants[0], 'defaults to', $participants[1]);
}
if ( $opt =~ m/restricted to option groups/ ) {
$rule_ok = 1;
my ($groups) = $opt =~ m/groups ([\w\s\,]+)/;
my @groups = split(',', $groups);
%{$self->{allowed_groups}->{$participants[0]}} = map {
s/\s+//;
$_ => 1;
} @groups;
}
if( $opt =~ m/accepts additional command-line arguments/ ) {
$rule_ok = 1;
$self->{strict} = 0;
MKDEBUG && _d("Strict mode disabled by rule");
}
die "Unrecognized option rule: $opt" unless $rule_ok;
}
}
foreach my $long ( keys %disables ) {
my @participants = $self->_get_participants($disables{$long});
$self->{disables}->{$long} = \@participants;
MKDEBUG && _d('Option', $long, 'disables', @participants);
}
return;
}
sub _get_participants {
my ( $self, $str ) = @_;
my @participants;
foreach my $long ( $str =~ m/--(?:\[no\])?([\w-]+)/g ) {
die "Option --$long does not exist while processing rule $str"
unless exists $self->{opts}->{$long};
push @participants, $long;
}
MKDEBUG && _d('Participants for', $str, ':', @participants);
return @participants;
}
sub opts {
my ( $self ) = @_;
my %opts = %{$self->{opts}};
return %opts;
}
sub short_opts {
my ( $self ) = @_;
my %short_opts = %{$self->{short_opts}};
return %short_opts;
}
sub set_defaults {
my ( $self, %defaults ) = @_;
$self->{defaults} = {};
foreach my $long ( keys %defaults ) {
die "Cannot set default for nonexistent option $long"
unless exists $self->{opts}->{$long};
$self->{defaults}->{$long} = $defaults{$long};
MKDEBUG && _d('Default val for', $long, ':', $defaults{$long});
}
return;
}
sub get_defaults {
my ( $self ) = @_;
return $self->{defaults};
}
sub get_groups {
my ( $self ) = @_;
return $self->{groups};
}
sub _set_option {
my ( $self, $opt, $val ) = @_;
my $long = exists $self->{opts}->{$opt} ? $opt
: exists $self->{short_opts}->{$opt} ? $self->{short_opts}->{$opt}
: die "Getopt::Long gave a nonexistent option: $opt";
$opt = $self->{opts}->{$long};
if ( $opt->{is_cumulative} ) {
$opt->{value}++;
}
else {
$opt->{value} = $val;
}
$opt->{got} = 1;
MKDEBUG && _d('Got option', $long, '=', $val);
}
sub get_opts {
my ( $self ) = @_;
foreach my $long ( keys %{$self->{opts}} ) {
$self->{opts}->{$long}->{got} = 0;
$self->{opts}->{$long}->{value}
= exists $self->{defaults}->{$long} ? $self->{defaults}->{$long}
: $self->{opts}->{$long}->{is_cumulative} ? 0
: undef;
}
$self->{got_opts} = 0;
$self->{errors} = [];
if ( @ARGV && $ARGV[0] eq "--config" ) {
shift @ARGV;
$self->_set_option('config', shift @ARGV);
}
if ( $self->has('config') ) {
my @extra_args;
foreach my $filename ( split(',', $self->get('config')) ) {
eval {
push @extra_args, $self->_read_config_file($filename);
};
if ( $EVAL_ERROR ) {
if ( $self->got('config') ) {
die $EVAL_ERROR;
}
elsif ( MKDEBUG ) {
_d($EVAL_ERROR);
}
}
}
unshift @ARGV, @extra_args;
}
Getopt::Long::Configure('no_ignore_case', 'bundling');
GetOptions(
map { $_->{spec} => sub { $self->_set_option(@_); } }
grep { $_->{long} ne 'config' } # --config is handled specially above.
values %{$self->{opts}}
) or $self->save_error('Error parsing options');
if ( exists $self->{opts}->{version} && $self->{opts}->{version}->{got} ) {
printf("%s Ver %s Distrib %s Changeset %s\n",
$self->{program_name}, $main::VERSION, $main::DISTRIB, $main::SVN_REV)
or die "Cannot print: $OS_ERROR";
exit 0;
}
if ( @ARGV && $self->{strict} ) {
$self->save_error("Unrecognized command-line options @ARGV");
}
foreach my $mutex ( @{$self->{mutex}} ) {
my @set = grep { $self->{opts}->{$_}->{got} } @$mutex;
if ( @set > 1 ) {
my $err = join(', ', map { "--$self->{opts}->{$_}->{long}" }
@{$mutex}[ 0 .. scalar(@$mutex) - 2] )
. ' and --'.$self->{opts}->{$mutex->[-1]}->{long}
. ' are mutually exclusive.';
$self->save_error($err);
}
}
foreach my $required ( @{$self->{atleast1}} ) {
my @set = grep { $self->{opts}->{$_}->{got} } @$required;
if ( @set == 0 ) {
my $err = join(', ', map { "--$self->{opts}->{$_}->{long}" }
@{$required}[ 0 .. scalar(@$required) - 2] )
.' or --'.$self->{opts}->{$required->[-1]}->{long};
$self->save_error("Specify at least one of $err");
}
}
$self->_check_opts( keys %{$self->{opts}} );
$self->{got_opts} = 1;
return;
}
sub _check_opts {
my ( $self, @long ) = @_;
my $long_last = scalar @long;
while ( @long ) {
foreach my $i ( 0..$#long ) {
my $long = $long[$i];
next unless $long;
my $opt = $self->{opts}->{$long};
if ( $opt->{got} ) {
if ( exists $self->{disables}->{$long} ) {
my @disable_opts = @{$self->{disables}->{$long}};
map { $self->{opts}->{$_}->{value} = undef; } @disable_opts;
MKDEBUG && _d('Unset options', @disable_opts,
'because', $long,'disables them');
}
if ( exists $self->{allowed_groups}->{$long} ) {
my @restricted_groups = grep {
!exists $self->{allowed_groups}->{$long}->{$_}
} keys %{$self->{groups}};
my @restricted_opts;
foreach my $restricted_group ( @restricted_groups ) {
RESTRICTED_OPT:
foreach my $restricted_opt (
keys %{$self->{groups}->{$restricted_group}} )
{
next RESTRICTED_OPT if $restricted_opt eq $long;
push @restricted_opts, $restricted_opt
if $self->{opts}->{$restricted_opt}->{got};
}
}
if ( @restricted_opts ) {
my $err;
if ( @restricted_opts == 1 ) {
$err = "--$restricted_opts[0]";
}
else {
$err = join(', ',
map { "--$self->{opts}->{$_}->{long}" }
grep { $_ }
@restricted_opts[0..scalar(@restricted_opts) - 2]
)
. ' or --'.$self->{opts}->{$restricted_opts[-1]}->{long};
}
$self->save_error("--$long is not allowed with $err");
}
}
}
elsif ( $opt->{is_required} ) {
$self->save_error("Required option --$long must be specified");
}
$self->_validate_type($opt);
if ( $opt->{parsed} ) {
delete $long[$i];
}
else {
MKDEBUG && _d('Temporarily failed to parse', $long);
}
}
die "Failed to parse options, possibly due to circular dependencies"
if @long == $long_last;
$long_last = @long;
}
return;
}
sub _validate_type {
my ( $self, $opt ) = @_;
return unless $opt;
if ( !$opt->{type} ) {
$opt->{parsed} = 1;
return;
}
my $val = $opt->{value};
if ( $val && $opt->{type} eq 'm' ) { # type time
MKDEBUG && _d('Parsing option', $opt->{long}, 'as a time value');
my ( $prefix, $num, $suffix ) = $val =~ m/([+-]?)(\d+)([a-z])?$/;
if ( !$suffix ) {
my ( $s ) = $opt->{desc} =~ m/\(suffix (.)\)/;
$suffix = $s || 's';
MKDEBUG && _d('No suffix given; using', $suffix, 'for',
$opt->{long}, '(value:', $val, ')');
}
if ( $suffix =~ m/[smhd]/ ) {
$val = $suffix eq 's' ? $num # Seconds
: $suffix eq 'm' ? $num * 60 # Minutes
: $suffix eq 'h' ? $num * 3600 # Hours
: $num * 86400; # Days
$opt->{value} = ($prefix || '') . $val;
MKDEBUG && _d('Setting option', $opt->{long}, 'to', $val);
}
else {
$self->save_error("Invalid time suffix for --$opt->{long}");
}
}
elsif ( $val && $opt->{type} eq 'd' ) { # type DSN
MKDEBUG && _d('Parsing option', $opt->{long}, 'as a DSN');
my $prev = {};
my $from_key = $self->{defaults_to}->{ $opt->{long} };
if ( $from_key ) {
MKDEBUG && _d($opt->{long}, 'DSN copies from', $from_key, 'DSN');
if ( $self->{opts}->{$from_key}->{parsed} ) {
$prev = $self->{opts}->{$from_key}->{value};
}
else {
MKDEBUG && _d('Cannot parse', $opt->{long}, 'until',
$from_key, 'parsed');
return;
}
}
my $defaults = $self->{DSNParser}->parse_options($self);
$opt->{value} = $self->{DSNParser}->parse($val, $prev, $defaults);
}
elsif ( $val && $opt->{type} eq 'z' ) { # type size
MKDEBUG && _d('Parsing option', $opt->{long}, 'as a size value');
$self->_parse_size($opt, $val);
}
elsif ( $opt->{type} eq 'H' || (defined $val && $opt->{type} eq 'h') ) {
$opt->{value} = { map { $_ => 1 } split(/(?<!\\),\s*/, ($val || '')) };
}
elsif ( $opt->{type} eq 'A' || (defined $val && $opt->{type} eq 'a') ) {
$opt->{value} = [ split(/(?<!\\),\s*/, ($val || '')) ];
}
else {
MKDEBUG && _d('Nothing to validate for option',
$opt->{long}, 'type', $opt->{type}, 'value', $val);
}
$opt->{parsed} = 1;
return;
}
sub get {
my ( $self, $opt ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
die "Option $opt does not exist"
unless $long && exists $self->{opts}->{$long};
return $self->{opts}->{$long}->{value};
}
sub got {
my ( $self, $opt ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
die "Option $opt does not exist"
unless $long && exists $self->{opts}->{$long};
return $self->{opts}->{$long}->{got};
}
sub has {
my ( $self, $opt ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
return defined $long ? exists $self->{opts}->{$long} : 0;
}
sub set {
my ( $self, $opt, $val ) = @_;
my $long = (length $opt == 1 ? $self->{short_opts}->{$opt} : $opt);
die "Option $opt does not exist"
unless $long && exists $self->{opts}->{$long};
$self->{opts}->{$long}->{value} = $val;
return;
}
sub save_error {
my ( $self, $error ) = @_;
push @{$self->{errors}}, $error;
return;
}
sub errors {
my ( $self ) = @_;
return $self->{errors};
}
sub usage {
my ( $self ) = @_;
warn "No usage string is set" unless $self->{usage}; # XXX
return "Usage: " . ($self->{usage} || '') . "\n";
}
sub descr {
my ( $self ) = @_;
warn "No description string is set" unless $self->{description}; # XXX
my $descr = ($self->{description} || $self->{program_name} || '')
. " For more details, please use the --help option, "
. "or try 'perldoc $PROGRAM_NAME' "
. "for complete documentation.";
$descr = join("\n", $descr =~ m/(.{0,80})(?:\s+|$)/g)
unless $ENV{DONT_BREAK_LINES};
$descr =~ s/ +$//mg;
return $descr;
}
sub usage_or_errors {
my ( $self, $file, $return ) = @_;
$file ||= $self->{file} || __FILE__;
if ( !$self->{description} || !$self->{usage} ) {
MKDEBUG && _d("Getting description and usage from SYNOPSIS in", $file);
my %synop = $self->_parse_synopsis($file);
$self->{description} ||= $synop{description};
$self->{usage} ||= $synop{usage};
MKDEBUG && _d("Description:", $self->{description},
"\nUsage:", $self->{usage});
}
if ( $self->{opts}->{help}->{got} ) {
print $self->print_usage() or die "Cannot print usage: $OS_ERROR";
exit 0 unless $return;
}
elsif ( scalar @{$self->{errors}} ) {
print $self->print_errors() or die "Cannot print errors: $OS_ERROR";
exit 0 unless $return;
}
return;
}
sub print_errors {
my ( $self ) = @_;
my $usage = $self->usage() . "\n";
if ( (my @errors = @{$self->{errors}}) ) {
$usage .= join("\n * ", 'Errors in command-line arguments:', @errors)
. "\n";
}
return $usage . "\n" . $self->descr();
}
sub print_usage {
my ( $self ) = @_;
die "Run get_opts() before print_usage()" unless $self->{got_opts};
my @opts = values %{$self->{opts}};
my $maxl = max(
map {
length($_->{long}) # option long name
+ ($_->{is_negatable} ? 4 : 0) # "[no]" if opt is negatable
+ ($_->{type} ? 2 : 0) # "=x" where x is the opt type
}
@opts);
my $maxs = max(0,
map {
length($_)
+ ($self->{opts}->{$_}->{is_negatable} ? 4 : 0)
+ ($self->{opts}->{$_}->{type} ? 2 : 0)
}
values %{$self->{short_opts}});
my $lcol = max($maxl, ($maxs + 3));
my $rcol = 80 - $lcol - 6;
my $rpad = ' ' x ( 80 - $rcol );
$maxs = max($lcol - 3, $maxs);
my $usage = $self->descr() . "\n" . $self->usage();
my @groups = reverse sort grep { $_ ne 'default'; } keys %{$self->{groups}};
push @groups, 'default';
foreach my $group ( reverse @groups ) {
$usage .= "\n".($group eq 'default' ? 'Options' : $group).":\n\n";
foreach my $opt (
sort { $a->{long} cmp $b->{long} }
grep { $_->{group} eq $group }
@opts )
{
my $long = $opt->{is_negatable} ? "[no]$opt->{long}" : $opt->{long};
my $short = $opt->{short};
my $desc = $opt->{desc};
$long .= $opt->{type} ? "=$opt->{type}" : "";
if ( $opt->{type} && $opt->{type} eq 'm' ) {
my ($s) = $desc =~ m/\(suffix (.)\)/;
$s ||= 's';
$desc =~ s/\s+\(suffix .\)//;
$desc .= ". Optional suffix s=seconds, m=minutes, h=hours, "
. "d=days; if no suffix, $s is used.";
}
$desc = join("\n$rpad", grep { $_ } $desc =~ m/(.{0,$rcol})(?:\s+|$)/g);
$desc =~ s/ +$//mg;
if ( $short ) {
$usage .= sprintf(" --%-${maxs}s -%s %s\n", $long, $short, $desc);
}
else {
$usage .= sprintf(" --%-${lcol}s %s\n", $long, $desc);
}
}
}
$usage .= "\nOption types: s=string, i=integer, f=float, h/H/a/A=comma-separated list, d=DSN, z=size, m=time\n";
if ( (my @rules = @{$self->{rules}}) ) {
$usage .= "\nRules:\n\n";
$usage .= join("\n", map { " $_" } @rules) . "\n";
}
if ( $self->{DSNParser} ) {
$usage .= "\n" . $self->{DSNParser}->usage();
}
$usage .= "\nOptions and values after processing arguments:\n\n";
foreach my $opt ( sort { $a->{long} cmp $b->{long} } @opts ) {
my $val = $opt->{value};
my $type = $opt->{type} || '';
my $bool = $opt->{spec} =~ m/^[\w-]+(?:\|[\w-])?!?$/;
$val = $bool ? ( $val ? 'TRUE' : 'FALSE' )
: !defined $val ? '(No value)'
: $type eq 'd' ? $self->{DSNParser}->as_string($val)
: $type =~ m/H|h/ ? join(',', sort keys %$val)
: $type =~ m/A|a/ ? join(',', @$val)
: $val;
$usage .= sprintf(" --%-${lcol}s %s\n", $opt->{long}, $val);
}
return $usage;
}
sub prompt_noecho {
shift @_ if ref $_[0] eq __PACKAGE__;
my ( $prompt ) = @_;
local $OUTPUT_AUTOFLUSH = 1;
print $prompt
or die "Cannot print: $OS_ERROR";
my $response;
eval {
require Term::ReadKey;
Term::ReadKey::ReadMode('noecho');
chomp($response = <STDIN>);
Term::ReadKey::ReadMode('normal');
print "\n"
or die "Cannot print: $OS_ERROR";
};
if ( $EVAL_ERROR ) {
die "Cannot read response; is Term::ReadKey installed? $EVAL_ERROR";
}
return $response;
}
if ( MKDEBUG ) {
print '# ', $^X, ' ', $], "\n";
my $uname = `uname -a`;
if ( $uname ) {
$uname =~ s/\s+/ /g;
print "# $uname\n";
}
printf("# %s Ver %s Distrib %s Changeset %s line %d\n",
$PROGRAM_NAME, ($main::VERSION || ''), ($main::DISTRIB || ''),
($main::SVN_REV || ''), __LINE__);
print('# Arguments: ',
join(' ', map { my $a = "_[$_]_"; $a =~ s/\n/\n# /g; $a; } @ARGV), "\n");
}
sub _read_config_file {
my ( $self, $filename ) = @_;
open my $fh, "<", $filename or die "Cannot open $filename: $OS_ERROR\n";
my @args;
my $prefix = '--';
my $parse = 1;
LINE:
while ( my $line = <$fh> ) {
chomp $line;
next LINE if $line =~ m/^\s*(?:\#|\;|$)/;
$line =~ s/\s+#.*$//g;
$line =~ s/^\s+|\s+$//g;
if ( $line eq '--' ) {
$prefix = '';
$parse = 0;
next LINE;
}
if ( $parse
&& (my($opt, $arg) = $line =~ m/^\s*([^=\s]+?)(?:\s*=\s*(.*?)\s*)?$/)
) {
push @args, grep { defined $_ } ("$prefix$opt", $arg);
}
elsif ( $line =~ m/./ ) {
push @args, $line;
}
else {
die "Syntax error in file $filename at line $INPUT_LINE_NUMBER";
}
}
close $fh;
return @args;
}
sub read_para_after {
my ( $self, $file, $regex ) = @_;
open my $fh, "<", $file or die "Can't open $file: $OS_ERROR";
local $INPUT_RECORD_SEPARATOR = '';
my $para;
while ( $para = <$fh> ) {
next unless $para =~ m/^=pod$/m;
last;
}
while ( $para = <$fh> ) {
next unless $para =~ m/$regex/;
last;
}
$para = <$fh>;
chomp($para);
close $fh or die "Can't close $file: $OS_ERROR";
return $para;
}
sub clone {
my ( $self ) = @_;
my %clone = map {
my $hashref = $self->{$_};
my $val_copy = {};
foreach my $key ( keys %$hashref ) {
my $ref = ref $hashref->{$key};
$val_copy->{$key} = !$ref ? $hashref->{$key}
: $ref eq 'HASH' ? { %{$hashref->{$key}} }
: $ref eq 'ARRAY' ? [ @{$hashref->{$key}} ]
: $hashref->{$key};
}
$_ => $val_copy;
} qw(opts short_opts defaults);
foreach my $scalar ( qw(got_opts) ) {
$clone{$scalar} = $self->{$scalar};
}
return bless \%clone;
}
sub _parse_size {
my ( $self, $opt, $val ) = @_;
if ( lc($val || '') eq 'null' ) {
MKDEBUG && _d('NULL size for', $opt->{long});
$opt->{value} = 'null';
return;
}
my %factor_for = (k => 1_024, M => 1_048_576, G => 1_073_741_824);
my ($pre, $num, $factor) = $val =~ m/^([+-])?(\d+)([kMG])?$/;
if ( defined $num ) {
if ( $factor ) {
$num *= $factor_for{$factor};
MKDEBUG && _d('Setting option', $opt->{y},
'to num', $num, '* factor', $factor);
}
$opt->{value} = ($pre || '') . $num;
}
else {
$self->save_error("Invalid size for --$opt->{long}");
}
return;
}
sub _parse_attribs {
my ( $self, $option, $attribs ) = @_;
my $types = $self->{types};
return $option
. ($attribs->{'short form'} ? '|' . $attribs->{'short form'} : '' )
. ($attribs->{'negatable'} ? '!' : '' )
. ($attribs->{'cumulative'} ? '+' : '' )
. ($attribs->{'type'} ? '=' . $types->{$attribs->{type}} : '' );
}