/usr/bin/dh_installchangelogs

#!/usr/bin/perl

=head1 NAME

dh_installchangelogs - install changelogs into package build directories

=cut

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

=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 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.

=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 $arch=package_arch($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;

		chown 0, 0, $output_fn, $output_fn_binary
			or error "chown: $!";

		umask $mask;

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

init();

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

my $upstream=shift;
my $upstream_text=$upstream;
my $upstream_html;
if (! defined $upstream) {
	if (isnative($dh{MAINPACKAGE})) {
		$changelog_name='changelog';
	}
}
elsif ($upstream=~m/\.html?$/i) {
	$upstream_html=$upstream;
	$upstream_text=shift;
}

foreach my $package (@{$dh{DOPACKAGES}}) {
	next if is_udeb($package);
	
	my $tmp=tmpdir($package);
	my $changelog=pkgfile($package,"changelog");
	my $news=pkgfile($package,"NEWS");

	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";
	}

	if (! -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) {
		my $link_to;
		my $base="$tmp/usr/share/doc/$package";
		if (defined $upstream_text) {
			install_file($upstream_text, "$base/changelog");
			$link_to='changelog';
		}
		if (defined $upstream_html) {
			install_file($upstream_html,"$base/changelog.html");
			$link_to='changelog.html';
			if (! defined $upstream_text) {
				complex_doit("echo 'See changelog.html.gz' > $base/changelog");
				doit("chmod","644","$base/changelog");
				doit("chown","0:0","$base/changelog");
			}
		}
		if ($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));
		}
	}
}

=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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debhelper 9.20160115ubuntu3 / usr / bin / dh_installchangelogs
