/usr/share/perl5/YAML/Shell.pm is in libyaml-shell-perl 0.60-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 | package YAML::Shell;
use 5.005003;
use strict;
# use warnings;
use Term::ReadLine;
sub Term::ReadLine::Perl::Tie::FIRSTKEY {undef}
use Data::Dumper;
use Config;
$Data::Dumper::Indent = 1;
$YAML::Shell::prompt = 'ysh > ';
$YAML::Shell::VERSION = '0.60';
my $round_trip = 0;
my $force = 0;
my $log = 0;
my $yaml_module = 'YAML::Any';
my $yaml_version;
$| = 1;
my $sh;
sub run {
my $class = shift;
set_version($yaml_module);
my @env_args = split /\s+/, ($ENV{YSH_OPT} || '');
my @args = (@env_args, @_);
my $stream = -t STDIN ? '' : join('', <STDIN>);
while (my $arg = shift @args) {
set_version($1), next if $arg =~ /^-M(.*)/;
handle_help(), exit if $arg eq '-h';
handle_version(), exit if $arg eq '-v';
handle_Version(), exit if $arg eq '-V';
$YAML::Indent = $1, next if $arg =~ /^-i(\d+)$/;
$YAML::UseFold = 1, next if $arg eq '-uf';
$YAML::UseBlock = 1, next if $arg eq '-ub';
$YAML::UseCode = 1, next if $arg eq '-uc';
$YAML::UseHeader = 0, next if $arg eq '-nh';
$YAML::UseVersion = 0, next if $arg eq '-nv';
$round_trip = 1, next if $arg eq '-r';
$round_trip = 2, next if $arg eq '-R';
$log = 1, next if $arg eq '-l';
$log = 2, next if $arg eq '-L';
$force = 1, next if $arg eq '-F';
warn(<<END), exit;
Unknown YAML Shell argument: '$arg'.
For help, try: perldoc ysh
END
}
set_version($yaml_module);
check_install() unless $force;
if ($log) {
if ($log == 2) {
open LOGFILE, "> ./ysh.log" or die $!;
}
else {
open LOGFILE, ">> ./ysh.log" or die $!;
}
no strict 'refs';
my $version = ${"${yaml_module}::VERSION"};
print LOGFILE "\n$yaml_module Version $version\n";
print LOGFILE "Begin logging at ", scalar localtime, "\n\n";
}
if (not length($stream)) {
Print(<<END);
Welcome to the YAML Test Shell. Type ':help' for more information.
END
}
{
{
local @ENV{qw(HOME EDITOR)};
local $^W;
$sh = Term::ReadLine::->new('The YAML Shell');
}
sub my_readline {
print LOGFILE $YAML::Shell::prompt if $log;
my $input = $sh->readline($YAML::Shell::prompt);
if (not defined $input) {
$input = ':exit';
Print("\n");
}
$input .= "\n";
}
}
if (length($stream)) {
my @objects;
no strict 'refs';
eval { @objects = &{"${yaml_module}::Load"}($stream) };
if ($@) {
print STDERR $@;
}
else {
print STDOUT Data::Dumper::Dumper(@objects);
}
exit 0;
}
while ($_ = my_readline()) {
print LOGFILE $_ if $log;
next if /^\s*$/;
exec('ysh', @ARGV) if /^\/$/;
handle_command($_),next if /^:/;
handle_file($1),next if /^<\s*(\S+)\s*$/;
handle_yaml($_),next if /^--\S/;
handle_yaml(''),next if /^===$/;
handle_perl($_,1),next if /^;/;
handle_perl($_,0),next;
Print("Unknown command. Type ':help' for instructions.\n");
}
}
sub set_version {
my $module = shift;
eval "require $module";
die $@ if $@;
$yaml_module = $module;
no strict 'refs';
$yaml_version = ${"${yaml_module}::VERSION"};
}
sub Print {
print @_;
print LOGFILE @_ if $log;
}
local $SIG{__WARN__} = sub { Print @_ };
sub handle_file {
my ($file) = @_;
my @objects;
eval {
no strict 'refs';
@objects = &{"${yaml_module}::LoadFile"}($file)
};
if ($@) {
Print $@;
}
else {
Print Data::Dumper::Dumper(@objects);
}
}
sub handle_perl {
my ($perl, $multi) = @_;
my (@objects, $yaml, $yaml2);
local $YAML::Shell::prompt = 'perl> ';
my $line = '';
if ($multi) {
while ($line !~ /^;$/) {
$line = my_readline();
print LOGFILE $line if $log;
$perl .= $line;
}
}
@objects = eval "no strict;$perl";
Print("Bad Perl expression:\n$@"), return if $@;
{
no strict 'refs';
eval { $yaml = &{"${yaml_module}::Dump"}(@objects) };
}
$@ =~ s/^ at.*\Z//sm if $@;
Print("Dump failed:\n$@"), return if $@;
Print $yaml;
if ($round_trip) {
{
local $SIG{__WARN__} = sub {};
no strict 'refs';
eval { $yaml2 = &{"${yaml_module}::Dump"}(&{"${yaml_module}::Load"}($yaml)) };
}
$@ =~ s/^ at.*\Z//sm if $@;
Print("Load failed:\n$@"), return if $@;
if ($yaml eq $yaml2) {
if ($round_trip > 1) {
Print "\nData roundtripped OK!!!\n";
}
}
else {
Print "================\n";
Print "after roundtrip:\n";
Print "================\n";
# $yaml2 =~ s/ /_/g; #
# $yaml2 =~ s/\n/+/g; #
# Print $yaml2, "\n"; #
Print $yaml2;
Print "=========================\n";
Print "Data did NOT roundtrip...\n";
}
}
}
sub handle_yaml {
my $yaml = shift;
my $line = $yaml;
my (@objects);
local $YAML::Shell::prompt = 'yaml> ';
$line = my_readline();
print LOGFILE $line if $log;
$line = '' unless defined $line;
while ($line !~ /^\.{3}$/) {
$yaml .= $line;
$line = my_readline();
print LOGFILE $line if $log;
last unless defined $line;
}
$yaml =~ s/\^{2,8}/\t/g;
no strict 'refs';
eval { @objects = &{"${yaml_module}::Load"}($yaml) };
$@ =~ s/^ at.*\Z//sm if $@;
$@ =~ s/^/ /gm if $@;
Print("YAML Load Failed:\n$@"), return if $@;
Print Data::Dumper::Dumper(@objects);
}
sub handle_command {
my $line = shift;
chomp $line;
my ($cmd, $args);
if ($line =~ /^:(\w+)\s*(.*)$/) {
$cmd = $1;
$args = $2;
exit if $cmd =~ /^(exit|q(uit)?)$/;
handle_help(),return if $cmd eq 'help';
print `clear`,return if $cmd =~ /^c(lear)?$/;
}
Print "Invalid command\n";
}
sub handle_help {
Print <<END;
Welcome to the YAML Test Shell.
When you to type in Perl, you get back YAML. And vice versa.
By default, every line you type is a one line Perl program, the
return value of which will be displayed as YAML.
To enter multi-line Perl code start the first line with ';' and use
as many lines as needed. Terminate with a line containing just ';'.
To enter YAML text, start with a valid YAML separator/header line
which is typically '---'. Use '===' to indicate that there is no YAML
header. Enter as many lines as needed. Terminate with a line
containing just '...'.
Shell Commands: (Begin with ':')
:exit or :q(uit) - leave the shell
:help - get this help screen
END
}
sub check_install {
if (-f "./YAML.pm" && -f "./pm_to_blib" &&
-M "./YAML.pm" < -M "./pm_to_blib"
) {
die "You need to 'make install'!\n";
}
}
sub handle_version {
print STDERR <<END;
ysh: '$YAML::Shell::VERSION'
${yaml_module}: '$yaml_version'
END
}
sub handle_Version {
my $TRP = get_version('Term::ReadLine::Perl');
my $TRG = get_version('Term::ReadLine::Gnu');
my $POE = get_version('POE');
my $TO = get_version('Time::Object');
print STDERR <<END;
ysh: '$YAML::Shell::VERSION'
${yaml_module}: '$yaml_version'
perl: '$Config::Config{version}'
Data::Dumper: '$Data::Dumper::VERSION'
Term::ReadLine::Perl: '$TRP'
Term::ReadLine::Gnu: '$TRG'
POE: '$POE'
Time::Object: '$TO'
END
}
sub get_version {
my ($module) = @_;
my $version;
eval "no strict; use $module; \$version = \$${module}::VERSION";
#$version = "$@" if $@;
$version = "not installed" if $@;
return $version;
}
1;
=encoding utf8
=head1 NAME
YAML::Shell - The YAML Test Shell
=head1 SYNOPSIS
> ysh [options]
=head1 DESCRIPTION
This module supports the C<ysh> command. It is not to be used in any
general way as a Perl module.
See L<ysh> for detailed information on using the C<ysh> command.
=head1 AUTHOR
Ingy döt Net <ingy@cpan.org>
=head1 COPYRIGHT
Copyright (c) 2008. Ingy döt Net.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See L<http://www.perl.com/perl/misc/Artistic.html>
=cut
|