#!/usr/bin/perl -w
-#
-# Generate symlinks in debian packages, reading debian/links. The
-# file contains pairs of files and symlinks.
+=head1 NAME
+
+dh_link - create symlinks in package build directories
+
+=cut
+
+use strict;
+use File::Find;
use Debian::Debhelper::Dh_Lib;
+
+=head1 SYNOPSIS
+
+B<dh_link> [S<I<debhelper options>>] [B<-A>] [S<I<source destination ...>>]
+
+=head1 DESCRIPTION
+
+dh_link is a debhelper program that creates symlinks in package build
+directories.
+
+dh_link accepts a list of pairs of source and destination files. The source
+files are the already existing files that will be symlinked from. The
+destination files are the symlinks that will be created. There B<must> be
+an equal number of source and destination files specified.
+
+The list can be specified in two ways. A file named debian/package.links
+can list pairs of files. If you use this file, you should put each pair
+of files on its own line, and separate the files within the pair with
+whitespace. Also, pairs of files can be specified as parameters - these
+pairs will only be created in the package build directory of the first
+package dh_link is told to act on. By default, this is the first binary
+package in debian/control, but if you use -p, -i, or -a flags, it will be
+the first package specified by those flags.
+
+Be sure you B<do> specify the full filename to both the source and
+destination files (unlike you would do if you were using something like
+L<ln(1)>).
+
+dh_link will generate symlinks that comply with debian policy - absolute
+when policy says they should be absolute, and relative links with as short
+a path as possible. It will also create any subdirectories it needs to to put
+the symlinks in.
+
+dh_link also scans the package build tree for existing symlinks which do not
+conform to debian policy, and corrects them (v4 only).
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<-A>, B<--all>
+
+Create any links specified by command line parameters in ALL packages
+acted on, not just the first.
+
+=item I<source destination ...>
+
+Create a file named "destination" as a link to a file named "source". Do
+this in the package build directory of the first package acted on.
+(Or in all packages if -A is specified.)
+
+=back
+
+=head1 EXAMPLES
+
+ dh_link usr/share/man/man1/foo.1 usr/share/man/man1/bar.1
+
+Make bar.1 be a symlink to foo.1
+
+ dh_link var/lib/foo usr/lib/foo \
+ usr/X11R6/man/man1/foo.1x usr/share/man/man1/bar.1
+
+Make /usr/lib/foo/ be a link to /var/lib/foo/, and bar.1 be a symlink to
+the X man page foo.1x
+
+=cut
+
init();
-foreach $PACKAGE (@{$dh{DOPACKAGES}}) {
- $TMP=tmpdir($PACKAGE);
- $file=pkgfile($PACKAGE,"links");
+foreach my $package (@{$dh{DOPACKAGES}}) {
+ my $tmp=tmpdir($package);
+ my $file=pkgfile($package,"links");
- undef @links;
+ my @links;
if ($file) {
@links=filearray($file);
}
error("$file lists a link without a destination.");
}
- if (($PACKAGE eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
+ if (($package eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
push @links, @ARGV;
}
error("parameters list a link without a destination.");
}
+ # v4 only and only if there is a temp dir already
+ if (! compat(3) && -e $tmp) {
+ # Scan for existing links and add them to @links, so they
+ # are recreated policy conformant.
+ find(
+ sub {
+ return unless -l;
+ my $dir=$File::Find::dir;
+ $dir=~s/^\Q$tmp\E//;
+ my $target = readlink($_);
+ if ($target=~/^\//) {
+ push @links, $target;
+ }
+ else {
+ push @links, "$dir/$target";
+ }
+ push @links, "$dir/$_";
+ doit("rm","-f",$_);
+
+ },
+ $tmp);
+ }
+
while (@links) {
- $dest=pop @links;
- $src=pop @links;
+ my $dest=pop @links;
+ my $src=pop @links;
- # Relivatize src and dest.
+ # Relavatize src and dest.
$src=~s:^/::;
$dest=~s:^/::;
# Make sure the directory the link will be in exists.
- $basedir=Debian::Debhelper::Dh_Lib::dirname("$TMP/$dest");
+ my $basedir=dirname("$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);
+ my @src_dirs=split(m:/+:,$src);
+ my @dest_dirs=split(m:/+:,$dest);
if ($src_dirs[0] eq $dest_dirs[0]) {
# Figure out how much of a path $src and $dest
# share in common.
+ my $x;
for ($x=0; $x<$#src_dirs && $src_dirs[$x] eq $dest_dirs[$x]; $x++) {}
# Build up the new src.
$src="";
$src="/$src";
}
- doit("ln","-sf",$src,"$TMP/$dest");
+ doit("ln","-sf",$src,"$tmp/$dest");
}
}
+
+=head1 SEE ALSO
+
+L<debhelper(7)>
+
+This program is a part of debhelper.
+
+=head1 AUTHOR
+
+Joey Hess <joeyh@debian.org>
+
+=cut
projects / debhelper.git / blobdiff