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
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
|
package TAP::Parser::SourceHandler::Perl;
use strict;
use warnings;
use Config;
use constant IS_WIN32 => ( $^O =~ /^(MS)?Win32$/ );
use constant IS_VMS => ( $^O eq 'VMS' );
use TAP::Parser::IteratorFactory ();
use TAP::Parser::Iterator::Process ();
use Text::ParseWords qw(shellwords);
use base 'TAP::Parser::SourceHandler::Executable';
TAP::Parser::IteratorFactory->register_handler(__PACKAGE__);
=head1 NAME
TAP::Parser::SourceHandler::Perl - Stream TAP from a Perl executable
=head1 VERSION
Version 3.36
=cut
our $VERSION = '3.36';
=head1 SYNOPSIS
use TAP::Parser::Source;
use TAP::Parser::SourceHandler::Perl;
my $source = TAP::Parser::Source->new->raw( \'script.pl' );
$source->assemble_meta;
my $class = 'TAP::Parser::SourceHandler::Perl';
my $vote = $class->can_handle( $source );
my $iter = $class->make_iterator( $source );
=head1 DESCRIPTION
This is a I<Perl> L<TAP::Parser::SourceHandler> - it has 2 jobs:
1. Figure out if the L<TAP::Parser::Source> it's given is actually a Perl
script (L</can_handle>).
2. Creates an iterator for Perl sources (L</make_iterator>).
Unless you're writing a plugin or subclassing L<TAP::Parser>, you probably
won't need to use this module directly.
=head1 METHODS
=head2 Class Methods
=head3 C<can_handle>
my $vote = $class->can_handle( $source );
Only votes if $source looks like a file. Casts the following votes:
0.9 if it has a shebang ala "#!...perl"
0.75 if it has any shebang
0.8 if it's a .t file
0.9 if it's a .pl file
0.75 if it's in a 't' directory
0.25 by default (backwards compat)
=cut
sub can_handle {
my ( $class, $source ) = @_;
my $meta = $source->meta;
return 0 unless $meta->{is_file};
my $file = $meta->{file};
if ( my $shebang = $file->{shebang} ) {
return 0.9 if $shebang =~ /^#!.*\bperl/;
# We favour Perl as the interpreter for any shebang to preserve
# previous semantics: we used to execute everything via Perl and
# relied on it to pass the shebang off to the appropriate
# interpreter.
return 0.3;
}
return 0.8 if $file->{lc_ext} eq '.t'; # vote higher than Executable
return 0.9 if $file->{lc_ext} eq '.pl';
return 0.75 if $file->{dir} =~ /^t\b/; # vote higher than Executable
# backwards compat, always vote:
return 0.25;
}
=head3 C<make_iterator>
my $iterator = $class->make_iterator( $source );
Constructs & returns a new L<TAP::Parser::Iterator::Process> for the source.
Assumes C<$source-E<gt>raw> contains a reference to the perl script. C<croak>s
if the file could not be found.
The command to run is built as follows:
$perl @switches $perl_script @test_args
The perl command to use is determined by L</get_perl>. The command generated
is guaranteed to preserve:
PERL5LIB
PERL5OPT
Taint Mode, if set in the script's shebang
I<Note:> the command generated will I<not> respect any shebang line defined in
your Perl script. This is only a problem if you have compiled a custom version
of Perl or if you want to use a specific version of Perl for one test and a
different version for another, for example:
#!/path/to/a/custom_perl --some --args
#!/usr/local/perl-5.6/bin/perl -w
Currently you need to write a plugin to get around this.
=cut
sub _autoflush_stdhandles {
my ($class) = @_;
$class->_autoflush( \*STDOUT );
$class->_autoflush( \*STDERR );
}
sub make_iterator {
my ( $class, $source ) = @_;
my $meta = $source->meta;
my $perl_script = ${ $source->raw };
$class->_croak("Cannot find ($perl_script)") unless $meta->{is_file};
# TODO: does this really need to be done here?
$class->_autoflush_stdhandles;
my ( $libs, $switches )
= $class->_mangle_switches(
$class->_filter_libs( $class->_switches($source) ) );
$class->_run( $source, $libs, $switches );
}
sub _has_taint_switch {
my( $class, $switches ) = @_;
my $has_taint = grep { $_ eq "-T" || $_ eq "-t" } @{$switches};
return $has_taint ? 1 : 0;
}
sub _mangle_switches {
my ( $class, $libs, $switches ) = @_;
# Taint mode ignores environment variables so we must retranslate
# PERL5LIB as -I switches and place PERL5OPT on the command line
# in order that it be seen.
if ( $class->_has_taint_switch($switches) ) {
my @perl5lib = defined $ENV{PERL5LIB} ? split /$Config{path_sep}/, $ENV{PERL5LIB} : ();
return (
$libs,
[ @{$switches},
$class->_libs2switches([@$libs, @perl5lib]),
defined $ENV{PERL5OPT} ? shellwords( $ENV{PERL5OPT} ) : ()
],
);
}
return ( $libs, $switches );
}
sub _filter_libs {
my ( $class, @switches ) = @_;
my $path_sep = $Config{path_sep};
my $path_re = qr{$path_sep};
# Filter out any -I switches to be handled as libs later.
#
# Nasty kludge. It might be nicer if we got the libs separately
# although at least this way we find any -I switches that were
# supplied other then as explicit libs.
#
# We filter out any names containing colons because they will break
# PERL5LIB
my @libs;
my @filtered_switches;
for (@switches) {
if ( !/$path_re/ && m/ ^ ['"]? -I ['"]? (.*?) ['"]? $ /x ) {
push @libs, $1;
}
else {
push @filtered_switches, $_;
}
}
return \@libs, \@filtered_switches;
}
sub _iterator_hooks {
my ( $class, $source, $libs, $switches ) = @_;
my $setup = sub {
if ( @{$libs} and !$class->_has_taint_switch($switches) ) {
$ENV{PERL5LIB} = join(
$Config{path_sep}, grep {defined} @{$libs},
$ENV{PERL5LIB}
);
}
};
# VMS environment variables aren't guaranteed to reset at the end of
# the process, so we need to put PERL5LIB back.
my $previous = $ENV{PERL5LIB};
my $teardown = sub {
if ( defined $previous ) {
$ENV{PERL5LIB} = $previous;
}
else {
delete $ENV{PERL5LIB};
}
};
return ( $setup, $teardown );
}
sub _run {
my ( $class, $source, $libs, $switches ) = @_;
my @command = $class->_get_command_for_switches( $source, $switches )
or $class->_croak("No command found!");
my ( $setup, $teardown ) = $class->_iterator_hooks( $source, $libs, $switches );
return $class->_create_iterator( $source, \@command, $setup, $teardown );
}
sub _create_iterator {
my ( $class, $source, $command, $setup, $teardown ) = @_;
return TAP::Parser::Iterator::Process->new(
{ command => $command,
merge => $source->merge,
setup => $setup,
teardown => $teardown,
}
);
}
sub _get_command_for_switches {
my ( $class, $source, $switches ) = @_;
my $file = ${ $source->raw };
my @args = @{ $source->test_args || [] };
my $command = $class->get_perl;
# XXX don't need to quote if we treat the parts as atoms (except maybe vms)
#$file = qq["$file"] if ( $file =~ /\s/ ) && ( $file !~ /^".*"$/ );
my @command = ( $command, @{$switches}, $file, @args );
return @command;
}
sub _libs2switches {
my $class = shift;
return map {"-I$_"} grep {$_} @{ $_[0] };
}
=head3 C<get_taint>
Decode any taint switches from a Perl shebang line.
# $taint will be 't'
my $taint = TAP::Parser::SourceHandler::Perl->get_taint( '#!/usr/bin/perl -t' );
# $untaint will be undefined
my $untaint = TAP::Parser::SourceHandler::Perl->get_taint( '#!/usr/bin/perl' );
=cut
sub get_taint {
my ( $class, $shebang ) = @_;
return
unless defined $shebang
&& $shebang =~ /^#!.*\bperl.*\s-\w*([Tt]+)/;
return $1;
}
sub _switches {
my ( $class, $source ) = @_;
my $file = ${ $source->raw };
my @switches = @{ $source->switches || [] };
my $shebang = $source->meta->{file}->{shebang};
return unless defined $shebang;
my $taint = $class->get_taint($shebang);
push @switches, "-$taint" if defined $taint;
# Quote the argument if we're VMS, since VMS will downcase anything
# not quoted.
if (IS_VMS) {
for (@switches) {
$_ = qq["$_"];
}
}
return @switches;
}
=head3 C<get_perl>
Gets the version of Perl currently running the test suite.
=cut
sub get_perl {
my $class = shift;
return $ENV{HARNESS_PERL} if defined $ENV{HARNESS_PERL};
return qq["$^X"] if IS_WIN32 && ( $^X =~ /[^\w\.\/\\]/ );
return $^X;
}
1;
__END__
=head1 SUBCLASSING
Please see L<TAP::Parser/SUBCLASSING> for a subclassing overview.
=head2 Example
package MyPerlSourceHandler;
use strict;
use TAP::Parser::SourceHandler::Perl;
use base 'TAP::Parser::SourceHandler::Perl';
# use the version of perl from the shebang line in the test file
sub get_perl {
my $self = shift;
if (my $shebang = $self->shebang( $self->{file} )) {
$shebang =~ /^#!(.*\bperl.*?)(?:(?:\s)|(?:$))/;
return $1 if $1;
}
return $self->SUPER::get_perl(@_);
}
=head1 SEE ALSO
L<TAP::Object>,
L<TAP::Parser>,
L<TAP::Parser::IteratorFactory>,
L<TAP::Parser::SourceHandler>,
L<TAP::Parser::SourceHandler::Executable>,
L<TAP::Parser::SourceHandler::File>,
L<TAP::Parser::SourceHandler::Handle>,
L<TAP::Parser::SourceHandler::RawTAP>
=cut
|