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package TAP::Harness::Env;
use strict;
use warnings;
use constant IS_VMS => ( $^O eq 'VMS' );
use TAP::Object;
use Text::ParseWords qw/shellwords/;
our $VERSION = '3.42';
# Get the parts of @INC which are changed from the stock list AND
# preserve reordering of stock directories.
sub _filtered_inc_vms {
my @inc = grep { !ref } @INC; #28567
# VMS has a 255-byte limit on the length of %ENV entries, so
# toss the ones that involve perl_root, the install location
@inc = grep { !/perl_root/i } @inc;
my @default_inc = _default_inc();
my @new_inc;
my %seen;
for my $dir (@inc) {
next if $seen{$dir}++;
if ( $dir eq ( $default_inc[0] || '' ) ) {
shift @default_inc;
}
else {
push @new_inc, $dir;
}
shift @default_inc while @default_inc and $seen{ $default_inc[0] };
}
return @new_inc;
}
# Cache this to avoid repeatedly shelling out to Perl.
my @inc;
sub _default_inc {
return @inc if @inc;
local $ENV{PERL5LIB};
local $ENV{PERLLIB};
my $perl = $ENV{HARNESS_PERL} || $^X;
# Avoid using -l for the benefit of Perl 6
chomp( @inc = `"$perl" -e "print join qq[\\n], \@INC, q[]"` );
return @inc;
}
sub create {
my $package = shift;
my %input = %{ shift || {} };
my @libs = @{ delete $input{libs} || [] };
my @raw_switches = @{ delete $input{switches} || [] };
my @opt
= ( @raw_switches, shellwords( $ENV{HARNESS_PERL_SWITCHES} || '' ) );
my @switches;
while ( my $opt = shift @opt ) {
if ( $opt =~ /^ -I (.*) $ /x ) {
push @libs, length($1) ? $1 : shift @opt;
}
else {
push @switches, $opt;
}
}
# Do things the old way on VMS...
push @libs, _filtered_inc_vms() if IS_VMS;
# If $Verbose isn't numeric default to 1. This helps core.
my $verbose
= $ENV{HARNESS_VERBOSE}
? $ENV{HARNESS_VERBOSE} !~ /\d/
? 1
: $ENV{HARNESS_VERBOSE}
: 0;
my %args = (
lib => \@libs,
timer => $ENV{HARNESS_TIMER} || 0,
switches => \@switches,
color => $ENV{HARNESS_COLOR} || 0,
verbosity => $verbose,
ignore_exit => $ENV{HARNESS_IGNORE_EXIT} || 0,
);
my $class = delete $input{harness_class} || $ENV{HARNESS_SUBCLASS} || 'TAP::Harness';
if ( defined( my $env_opt = $ENV{HARNESS_OPTIONS} ) ) {
for my $opt ( split /:/, $env_opt ) {
if ( $opt =~ /^j(\d*)$/ ) {
$args{jobs} = $1 || 9;
}
elsif ( $opt eq 'c' ) {
$args{color} = 1;
}
elsif ( $opt =~ m/^f(.*)$/ ) {
my $fmt = $1;
$fmt =~ s/-/::/g;
$args{formatter_class} = $fmt;
}
elsif ( $opt =~ m/^a(.*)$/ ) {
my $archive = $1;
$class = 'TAP::Harness::Archive';
$args{archive} = $archive;
}
else {
die "Unknown HARNESS_OPTIONS item: $opt\n";
}
}
}
return TAP::Object->_construct($class, { %args, %input });
}
1;
=head1 NAME
TAP::Harness::Env - Parsing harness related environmental variables where appropriate
=head1 VERSION
Version 3.42
=head1 SYNOPSIS
my $harness = TAP::Harness::Env->create(\%extra_args)
=head1 DESCRIPTION
This module implements the environmental variables that L<Test::Harness> uses with TAP::Harness, and instantiates the appropriate class with the appropriate arguments.
=head1 METHODS
=over 4
=item * create( \%args )
This function reads the environment and generates an appropriate argument hash from it. If given any arguments in C<%extra_args>, these will override the environmental defaults. In accepts C<harness_class> (which defaults to C<TAP::Harness>), and any argument the harness class accepts.
=back
=head1 ENVIRONMENTAL VARIABLES
=over 4
=item C<HARNESS_PERL_SWITCHES>
Setting this adds perl command line switches to each test file run.
For example, C<HARNESS_PERL_SWITCHES=-T> will turn on taint mode.
C<HARNESS_PERL_SWITCHES=-MDevel::Cover> will run C<Devel::Cover> for
each test.
=item C<HARNESS_VERBOSE>
If true, C<TAP::Harness> will output the verbose results of running
its tests.
=item C<HARNESS_SUBCLASS>
Specifies a TAP::Harness subclass to be used in place of TAP::Harness.
=item C<HARNESS_OPTIONS>
Provide additional options to the harness. Currently supported options are:
=over
=item C<< j<n> >>
Run <n> (default 9) parallel jobs.
=item C<< c >>
Try to color output. See L<TAP::Formatter::Base/"new">.
=item C<< a<file.tgz> >>
Will use L<TAP::Harness::Archive> as the harness class, and save the TAP to
C<file.tgz>
=item C<< fPackage-With-Dashes >>
Set the formatter_class of the harness being run. Since the C<HARNESS_OPTIONS>
is seperated by C<:>, we use C<-> instead.
=back
Multiple options may be separated by colons:
HARNESS_OPTIONS=j9:c make test
=item C<HARNESS_TIMER>
Setting this to true will make the harness display the number of
milliseconds each test took. You can also use F<prove>'s C<--timer>
switch.
=item C<HARNESS_COLOR>
Attempt to produce color output.
=item C<HARNESS_IGNORE_EXIT>
If set to a true value instruct C<TAP::Parser> to ignore exit and wait
status from test scripts.
=back