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#!/usr/bin/perl -w
#
# Generate symlinks in debian packages, reading debian/links. The
# file contains pairs of files and symlinks.
BEGIN { push @INC, "debian", "/usr/lib/debhelper" }
use Dh_Lib;
init();
foreach $PACKAGE (@{$dh{DOPACKAGES}}) {
$TMP=tmpdir($PACKAGE);
$file=pkgfile($PACKAGE,"links");
undef @links;
if ($file) {
@links=filearray($file);
}
# Make sure it has pairs of symlinks and destinations. If it
# doesn't, $#links will be _odd_ (not even, -- it's zero-based).
if (int($#links/2) eq $#links/2) {
error("$file lists a link without a destination.");
}
if (($PACKAGE eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
push @links, @ARGV;
}
# Same test as above, including arguments this time.
if (int($#links/2) eq $#links/2) {
error("parameters list a link without a destination.");
}
# Now I'd prefer to work with a hash.
%links=@links;
foreach $src (keys %links) {
$dest=$links{$src};
# Make sure the directory the link will be in exists.
$basedir=Dh_Lib::dirname("$TMP/$dest");
if (! -e $basedir) {
doit("install","-d",$basedir);
}
# Policy says that if the link is all within one toplevel
# directory, it should be relative. If it's between
# top level directories, leave it absolute.
@src_dirs=split(m:/+:,$src);
@dest_dirs=split(m:/+:,$dest);
if ($src_dirs[0] eq $dest_dirs[0]) {
# Figure out how much of a path $src and $dest
# share in common.
for ($x=0; $x<$#src_dirs && $src_dirs[$x] eq $dest_dirs[$x]; $x++) {}
# Build up the new src.
$src="";
for (1..$#dest_dirs - $x) {
$src.="../";
}
# The + 1 is here to include the actual filename.
for (1..$#src_dirs - $x + 1) {
$src.=$src_dirs[$_]."/";
}
$src=~s:/$::;
}
doit("ln","-sf",$src,"$TMP/$dest");
}
}
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