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l8íºð3Ø:³¤¬KX¯UÿÙ#!/usr/bin/perl

=head1 NAME

dh_installchangelogs - install changelogs into package build directories

=cut

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

our $VERSION = DH_BUILTIN_VERSION;

=head1 SYNOPSIS

B<dh_installchangelogs> [S<I<debhelper options>>] [B<-k>] [B<-X>I<item>] [I<upstream>]

=head1 DESCRIPTION

B<dh_installchangelogs> is a debhelper program that is responsible for
installing changelogs into package build directories.

An upstream F<changelog> file may be specified as an option.

If there is an upstream F<changelog> file, it will be installed as
F<usr/share/doc/package/changelog> in the package build directory.

If the specified upstream changelog is an F<html> file (determined by file
extension), it will be installed as F<usr/share/doc/package/changelog.html>
instead. If the html changelog is converted to plain text, that variant
can be specified as a second upstream changelog file. When no plain
text variant is specified, a short F<usr/share/doc/package/changelog>
is generated, pointing readers at the html changelog file.

=head1 FILES

=over 4

=item F<debian/changelog>

=item F<debian/NEWS>

=item debian/I<package>.changelog

=item debian/I<package>.NEWS

Automatically installed into usr/share/doc/I<package>/
in the package build directory.

Use the package specific name if I<package> needs a different
F<NEWS> or F<changelog> file.

The F<changelog> file is installed with a name of changelog
for native packages, and F<changelog.Debian> for non-native packages.
The F<NEWS> file is always installed with a name of F<NEWS.Debian>.

=back

=head1 OPTIONS

=over 4

=item B<-k>, B<--keep>

Keep the original name of the upstream changelog. This will be accomplished
by installing the upstream changelog as F<changelog>, and making a symlink from
that to the original name of the F<changelog> file. This can be useful if the
upstream changelog has an unusual name, or if other documentation in the
package refers to the F<changelog> file.

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

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

Note that directory name of the changelog is also part of the match.

=item I<upstream>

Install this file as the upstream changelog.

=back

=cut

# For binNMUs the first changelog entry is written into an extra file to
# keep the packages coinstallable.
sub install_binNMU_changelog {
	my ($package, $input_fn, $changelog_name)=@_;

	open (my $input, "<", $input_fn);
	my $line=<$input>;
	if (defined $line && $line =~ /\A\S.*;.*\bbinary-only=yes/) {
		my $mask=umask 0022;

		my @stat=stat $input_fn or error("could not stat $input_fn: $!");
		my $tmp=tmpdir($package);
		my $output_fn="$tmp/usr/share/doc/$package/$changelog_name";
		open my $output, ">", $output_fn
			or error("could not open $output_fn for writing: $!");
		my $arch=package_binary_arch($package);
		my $output_fn_binary="$output_fn.$arch";
		open my $output_binary, ">", $output_fn_binary
			or error("could not open $output_fn_binary for writing: $!");

		do {
			print {$output_binary} $line
				or error("Could not write to $output_fn_binary: $!");
		} while(defined($line=<$input>) && $line !~ /\A\S/);
		close $output_binary or error("Couldn't close $output_fn_binary: $!");
		utime $stat[8], $stat[9], $output_fn_binary;

		do {
			print {$output} $line
				or error("Could not write to $output_fn: $!");
		} while(defined($line=<$input>));

		close $input or error("Couldn't close $input_fn: $!");
		close $output or error("Couldn't close $output_fn: $!");
		utime $stat[8], $stat[9], $output_fn;

		if (should_use_root()) {
			chown(0, 0, $output_fn, $output_fn_binary) or error("chown: $!");
		}

		umask $mask;

		return 1;
	}
	else {
		close $input;
		return 0;
	}
}

init(options => {
	'keep|k'  => \$dh{K_FLAG},
});

my $news_name="NEWS.Debian";
my $changelog_name="changelog.Debian";

my $explicit_changelog = @ARGV ? 1 : 0;
my $default_upstream = $ARGV[0];
my $default_upstream_text=$default_upstream;
my $default_upstream_html;
if (! defined($default_upstream)) {
	if (isnative($dh{MAINPACKAGE})) {
		$changelog_name='changelog';
	}
}
elsif ($default_upstream=~m/\.html?$/i) {
	$default_upstream_html=$default_upstream;
	$default_upstream_text=$ARGV[1];
}

sub find_changelog {
	my ($dir) = @_;
	my @files=sort glob("$dir/*");
	foreach my $suffix ('', qw(.txt .md .rst)) {
		foreach my $name (qw{changelog changes history}) {
			my @matches=grep {
				lc basename($_) eq "$name$suffix" && -f $_ && -s _ && ! excludefile($_)
			} @files;
			if (@matches) {
				return shift(@matches);
			}
		}
	}
	return;
}

on_pkgs_in_parallel {
	foreach my $package (@_) {
		next if is_udeb($package);
	
		my $tmp=tmpdir($package);
		my $changelog=pkgfile($package,"changelog");
		my $news=pkgfile($package,"NEWS");
		my $upstream_changelog;
		my ($upstream_changelog_text, $upstream_changelog_html);
		my $changelog_from_tmp_dir = 0;

		if ($explicit_changelog) {
			$upstream_changelog = $default_upstream;
			$upstream_changelog_text = $default_upstream_text;
			$upstream_changelog_html = $default_upstream_html;
		}

		if (!$changelog) {
			$changelog="debian/changelog";
		}
		if (!$news) {
			$news="debian/NEWS";
		}

		if (! -e $changelog) {
			error("could not find changelog $changelog");
		}

		# If it is a symlink to a documentation directory from the same
		# source package, then don't do anything. Think multi-binary
		# packages that depend on each other and want to link doc dirs.
		if (-l "$tmp/usr/share/doc/$package") {
			my $linkval=readlink("$tmp/usr/share/doc/$package");
			my %allpackages=map { $_ => 1 } getpackages();
			if ($allpackages{basename($linkval)}) {
				next;
			}
			# Even if the target doesn't seem to be a doc dir from the
			# same source package, don't do anything if it's a dangling
			# symlink.
			next unless -d "$tmp/usr/share/doc/$package";
		}

		install_dir("$tmp/usr/share/doc/$package");

		if (! $dh{NO_ACT}) {
			if (! install_binNMU_changelog($package, $changelog, $changelog_name)) {
				install_file($changelog,
							 "$tmp/usr/share/doc/$package/$changelog_name");
			}
		}

		if (-e $news) {
			install_file($news, "$tmp/usr/share/doc/$package/$news_name");
		}

		if (defined($upstream_changelog)) {
			my $link_to;
			my $base="$tmp/usr/share/doc/$package";
			if (defined($upstream_changelog_text)) {
				if ($changelog_from_tmp_dir and not $dh{K_FLAG}) {
					# mv (unless if it is the same file)
					rename_path($upstream_changelog_text, "$base/changelog")
						if basename($upstream_changelog_text) ne 'changelog';
					reset_perm_and_owner(0644, "$base/changelog");
				} else {
					install_file($upstream_changelog_text, "$base/changelog");
				}
				$link_to='changelog';
			}
			if (defined($upstream_changelog_html)) {
				if ($changelog_from_tmp_dir and not $dh{K_FLAG}) {
					# mv (unless if it is the same file)
					rename_path($upstream_changelog_html, "$base/changelog.html")
						if basename($upstream_changelog_text) ne 'changelog.html';
					reset_perm_and_owner(0644, "$base/changelog.html");
				} else {
					install_file($upstream_changelog_html,"$base/changelog.html");
				}
				$link_to='changelog.html';
				if (! defined($upstream_changelog_text)) {
					complex_doit("echo 'See changelog.html.gz' > $base/changelog");
					reset_perm_and_owner(0644,"$base/changelog");
				}
			}
			if ($dh{K_FLAG}) {
				# Install symlink to original name of the upstream changelog file.
				# Use basename in case original file was in a subdirectory or something.
				doit('ln', '-sf', $link_to, "$tmp/usr/share/doc/$package/".basename($upstream_changelog));
			}
		}
	}
};

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut