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package YATT::Lite::Util::CmdLine; |
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use strict; |
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use warnings qw(FATAL all NONFATAL misc); |
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BEGIN {require Exporter; *import = \&Exporter::import} |
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our @EXPORT = qw(parse_opts parse_params); |
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our @EXPORT_OK = (@EXPORT, qw(run process_result)); |
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# posix style option. |
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sub parse_opts { |
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my ($pack, $list, $result, $alias) = @_; |
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my $wantarray = wantarray; |
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unless (defined $result) { |
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$result = $wantarray ? [] : {}; |
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} |
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while (@$list and my ($n, $v) = $list->[0] |
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=~ m{^--$ | ^(?:--? ([\w:\-\.]+) (?: =(.*))?)$}xs) { |
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shift @$list; |
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last unless defined $n; |
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$n = $alias->{$n} if $alias and $alias->{$n}; |
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$v = 1 unless defined $v; |
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if (ref $result eq 'HASH') { |
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$result->{$n} = $v; |
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} else { |
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push @$result, $n, $v; |
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} |
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} |
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$wantarray && ref $result ne 'HASH' ? @$result : $result; |
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} |
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# 'Make' style parameter. |
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sub parse_params { |
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my ($pack, $list, $hash) = @_; |
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my $explicit; |
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unless (defined $hash) { |
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$hash = {} |
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} else { |
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$explicit++; |
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} |
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for (; @$list and $list->[0] =~ /^([^=]+)=(.*)/s; shift @$list) { |
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$hash->{$1} = $2; |
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} |
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if (not $explicit and wantarray) { |
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# return empty list if hash is empty |
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%$hash ? $hash : (); |
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} else { |
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$hash |
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} |
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} |
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sub run { |
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my ($pack, $list, $alias) = @_; |
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my @opts = parse_opts($pack, $list, $alias); |
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my $app = do { |
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if (ref $pack) { |
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$pack->configure(@opts); |
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$pack; |
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} else { |
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1
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$pack->new(@opts); |
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} |
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}; |
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my $cmd = shift @$list || 'help'; |
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$app->configure(parse_opts($pack, \@_, $alias)); |
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1
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if (my $sub = $app->can("cmd_$cmd")) { |
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$sub->($app, @$list); |
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} elsif ($sub = $app->can($cmd)) { |
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process_result($sub->($app, @$list)); |
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} else { |
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die "$0: Unknown subcommand '$cmd'\n" |
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} |
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if (my $sub = $app->can('DESTROY')) { |
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$sub->($app); |
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} |
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} |
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sub process_result { |
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my (@res) = @_; |
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if (not @res |
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or @res == 1 and not $res[0]) { |
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exit 1; |
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} elsif (@res == 1 and defined $res[0] and $res[0] eq 1) { |
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# nop |
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} else { |
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0
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require YATT::Lite::Util; |
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0
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foreach my $res (@res) { |
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0
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0
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unless (defined $res) { |
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0
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print "(undef)\n"; |
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} elsif (not ref $res) { |
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print $res, "\n"; |
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} elsif (my $sub = $res->can('get_columns')) { |
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my @kv = $sub->($res); |
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my $cnt; |
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while (my ($k, $v) = splice @kv, 0, 2) { |
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print "\t" if $cnt++; |
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print "$k=", YATT::Lite::Util::terse_dump($v); |
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} |
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print "\n"; |
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} else { |
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print YATT::Lite::Util::terse_dump($res), "\n"; |
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} |
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} |
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} |
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} |
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1; |