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# Copyright © 2012 Guillem Jover <guillem@debian.org>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
package Dpkg::BuildEnv;
use strict;
use warnings;
our $VERSION = '0.01';
my %env_modified = ();
my %env_accessed = ();
=encoding utf8
=head1 NAME
Dpkg::BuildEnv - track build environment
=head1 DESCRIPTION
The Dpkg::BuildEnv module is used by dpkg-buildflags to track the build
environment variables being used and modified.
=head1 FUNCTIONS
=over 4
=item set($varname, $value)
Update the build environment variable $varname with value $value. Record
it as being accessed and modified.
=cut
sub set {
my ($varname, $value) = @_;
$env_modified{$varname} = 1;
$env_accessed{$varname} = 1;
$ENV{$varname} = $value;
}
=item get($varname)
Get the build environment variable $varname value. Record it as being
accessed.
=cut
sub get {
my $varname = shift;
$env_accessed{$varname} = 1;
return $ENV{$varname};
}
=item has($varname)
Return a boolean indicating whether the environment variable exists.
Record it as being accessed.
=cut
sub has {
my $varname = shift;
$env_accessed{$varname} = 1;
return exists $ENV{$varname};
}
=item @list = list_accessed()
Returns a list of all environment variables that have been accessed.
=cut
sub list_accessed {
my @list = sort keys %env_accessed;
return @list;
}
=item @list = list_modified()
Returns a list of all environment variables that have been modified.
=cut
sub list_modified {
my @list = sort keys %env_modified;
return @list;
}
=back
=head1 CHANGES
=head2 Version 0.xx
This is a private module.
=cut
1;
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