#!/usr/bin/perl

=head1 NAME

dh_installexamples - install example files into package build directories

=cut

use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;

=head1 SYNOPSIS

B<dh_installexamples> [S<I<debhelper options>>] [B<-A>] [B<-X>I<item>] [S<I<file> ...>]

=head1 DESCRIPTION

B<dh_installexamples> is a debhelper program that is responsible for
installing examples into F<usr/share/doc/package/examples> in package
build directories.

=head1 FILES

=over 4

=item debian/I<package>.examples

Lists example files or directories to be installed.

=back

=head1 OPTIONS

=over 4

=item B<-A>, B<--all>

Install any files specified by command line parameters in ALL packages
acted on.

=item B<-X>I<item>, B<--exclude=>I<item>

Exclude files that contain I<item> anywhere in their filename from
being installed.

=item I<file> ...

Install these files (or directories) as examples into the first package
acted on. (Or into all packages if B<-A> is specified.)

=back

=head1 NOTES

Note that B<dh_installexamples> will happily copy entire directory hierarchies
if you ask it to (similar to B<cp -a>). If it is asked to install a
directory, it will install the complete contents of the directory.

=cut

init();

# PROMISE: DH NOOP WITHOUT examples

my $pwd;

foreach my $package (@{$dh{DOPACKAGES}}) {
	next if is_udeb($package);

	my $tmp=tmpdir($package);
	my $file=pkgfile($package,"examples");
	
	my @examples;
	
	if ($file) {
		@examples=filearray($file, ".");
	}	

	if (($package eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
		push @examples, @ARGV;
	}
	
	if (@examples) {
		if (! -d "$tmp/usr/share/doc/$package/examples") {
			install_dir("$tmp/usr/share/doc/$package/examples");
		}
		
		my $exclude = '';
		if ($dh{EXCLUDE_FIND}) {
			$exclude .= ' -and ! \( '.$dh{EXCLUDE_FIND}.' \)';
		}
		
		foreach my $example (@examples) {
			next if excludefile($example);
			if (-d $example && $exclude) {
				my $basename = basename($example);
				my $dir = ($basename eq '.') ? $example : "$example/..";
				chomp($pwd=`pwd`) if not defined($pwd);
				complex_doit("cd '$dir' && " .
							 "find '$basename' -type f$exclude -print0 | LC_ALL=C sort -z | " .
							 "xargs -0 -I {} cp --reflink=auto --parents -dp {} $pwd/$tmp/usr/share/doc/$package/examples");
			}
			else {
				doit("cp", '--reflink=auto', "-a", $example,
					 "$tmp/usr/share/doc/$package/examples");
			}
		}
	}
}

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut

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