-#!/bin/sh -e
-#
-# Installs debian/changelog. If another filename is passed to it, installs
-# that file as the upstream changelog.
-#
-# Looks at debian/control to determine if this is a native debian package,
-# if so, the debian changelog is just installed as "changelog", and it is an
-# error to specify an upstream changelog on the command line.
-
-PATH=debian:$PATH:/usr/lib/debhelper
-source dh_lib
-
-UPSTREAM=$1
-
-if [ "$NATIVE" -a "$UPSTREAM" ]; then
- error "Cannot specify an upstream changelog for a native package."
-fi
-
-if [ "$NATIVE" ]; then
- CHANGELOG_NAME=changelog
-else
- CHANGELOG_NAME=changelog.Debian
-fi
-
-if [ ! -d debian/tmp/usr/doc/$PACKAGE ]; then
- doit "install -d debian/tmp/usr/doc/$PACKAGE"
-fi
-doit "install -p -m644 debian/changelog debian/tmp/usr/doc/$PACKAGE/$CHANGELOG_NAME"
-
-if [ "$UPSTREAM" ]; then
- doit "install -p -m644 $UPSTREAM debian/tmp/usr/doc/$PACKAGE/changelog"
-fi
+#!/usr/bin/perl -w
+
+=head1 NAME
+
+dh_installchangelogs - install changelogs into package build directories
+
+=cut
+
+use strict;
+use Debian::Debhelper::Dh_Lib;
+
+=head1 SYNOPSIS
+
+B<dh_installchangelogs> [S<I<debhelper options>>] [B<-k>] [I<upstream>]
+
+=head1 DESCRIPTION
+
+dh_installchangelogs is a debhelper program that is responsible for
+installing changelogs into package build directories.
+
+dh_installchangelogs determines if the package is a debian native package,
+and if so, it installs debian/changelog into usr/share/doc/package/changelog
+in the package build directory. Otherwise, it installs debian/changelog
+into usr/share/doc/package/changelog.Debian in the package build directory. (If
+files named debian/package.changelog exist, they will be used in preference
+to debian/changelog.)
+
+Parallelling the debian changelog handling, this program also takes care of
+NEWS.Debian files. If there is a debian/NEWS file, it is installed as
+usr/share/doc/package/NEWS.Debian. debian/package.NEWS files can also be
+used.
+
+An upstream changelog file may be specified as an option. If none is
+specified, a few common filenames are tried. (In compatibility level 7 and
+above.)
+
+If there is an upstream changelog file, it will be be installed as
+usr/share/doc/package/changelog in the package build directory. If the
+changelog is a html file (determined by file extension), it will be
+installed as usr/share/doc/package/changelog.html instead, and will be
+converted to plain text with html2text to generate
+usr/share/doc/package/changelog.
+
+=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 "changelog", and making a symlink from
+that to the original name of the changelog file. This can be useful if the
+upstream changelog has an unusual name, or if other documentation in the
+package refers to the changelog file.
+
+=item I<upstream>
+
+Install this file as the upstream changelog.
+
+=back
+
+=cut
+
+init();
+
+my $upstream=shift;
+my $changelog_name="changelog.Debian";
+if (! defined $upstream) {
+ if (! isnative($dh{MAINPACKAGE}) && !compat(6)) {
+ my @files=sort glob("*");
+ foreach my $name (qw{changelog changes}) {
+ my @matches=grep { lc $_ eq $name && -s $_ } @files;
+ if (@matches) {
+ $upstream=shift @matches;
+ last;
+ }
+ }
+ }
+ if (isnative($dh{MAINPACKAGE})) {
+ $changelog_name='changelog';
+ }
+}
+my $news_name="NEWS.Debian";
+
+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 $changelog");
+ }
+
+ if (! -d "$tmp/usr/share/doc/$package") {
+ # If it is a dangling symlink, then don't do anything.
+ # Think multi-binary packages that depend on each other and
+ # want to link doc dirs.
+ next if -l "$tmp/usr/share/doc/$package";
+
+ doit("install","-d","$tmp/usr/share/doc/$package");
+ }
+ doit("install","-o",0,"-g",0,"-p","-m644",$changelog,
+ "$tmp/usr/share/doc/$package/$changelog_name");
+ if (-e $news) {
+ doit("install","-o",0,"-g",0,"-p","-m644",$news,
+ "$tmp/usr/share/doc/$package/$news_name");
+ }
+
+ if (defined $upstream) {
+ my $link_to;
+ if ($upstream=~m/\.html?$/i) {
+ # HTML changelog
+ doit("install","-o",0,"-g",0,"-p","-m644",
+ $upstream,"$tmp/usr/share/doc/$package/changelog.html");
+ doit("html2text","-nobs","-o","$tmp/usr/share/doc/$package/changelog",$upstream);
+ $link_to='changelog.html';
+ }
+ else {
+ doit("install","-o",0,"-g",0,"-p","-m644",
+ $upstream,"$tmp/usr/share/doc/$package/changelog");
+ $link_to='changelog';
+ }
+ if ($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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