168 lines
4.1 KiB
Perl
Executable file
168 lines
4.1 KiB
Perl
Executable file
#! @perl@ -w
|
|
|
|
use strict;
|
|
use Cwd;
|
|
use IO::Handle;
|
|
use File::Path;
|
|
use File::Basename;
|
|
|
|
STDOUT->autoflush(1);
|
|
|
|
my $out = $ENV{"out"};
|
|
mkdir "$out", 0755 || die "error creating $out";
|
|
|
|
|
|
my $symlinks = 0;
|
|
|
|
|
|
my @pathsToLink = split ' ', $ENV{"pathsToLink"};
|
|
|
|
sub isInPathsToLink {
|
|
my $path = shift;
|
|
$path = "/" if $path eq "";
|
|
foreach my $elem (@pathsToLink) {
|
|
return 1 if substr($path, 0, length($elem)) eq $elem;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
sub symLinkMkdir {
|
|
my $src = shift;
|
|
my $dst = shift;
|
|
my $dir = dirname $dst;
|
|
mkpath $dir;
|
|
symlink($src, $dst) ||
|
|
die "error creating link `$dst': $!";
|
|
$symlinks++;
|
|
}
|
|
|
|
|
|
# For each activated package, create symlinks.
|
|
|
|
sub createLinks {
|
|
my $relName = shift;
|
|
my $srcDir = shift;
|
|
my $dstDir = shift;
|
|
my $ignoreCollisions = shift;
|
|
|
|
my @srcFiles = glob("$srcDir/*");
|
|
|
|
foreach my $srcFile (@srcFiles) {
|
|
my $baseName = $srcFile;
|
|
$baseName =~ s/^.*\///g; # strip directory
|
|
my $dstFile = "$dstDir/$baseName";
|
|
my $relName2 = "$relName/$baseName";
|
|
|
|
# Urgh, hacky...
|
|
if ($srcFile =~ /\/propagated-build-inputs$/ ||
|
|
$srcFile =~ /\/nix-support$/ ||
|
|
$srcFile =~ /\/perllocal.pod$/ ||
|
|
$srcFile =~ /\/info\/dir$/ ||
|
|
$srcFile =~ /\/log$/)
|
|
{
|
|
# Do nothing.
|
|
}
|
|
|
|
elsif (-d $srcFile) {
|
|
|
|
if (!isInPathsToLink($relName2)) {
|
|
# This path is not in the list of paths to link, but
|
|
# some of its children may be.
|
|
createLinks($relName2, $srcFile, $dstFile, $ignoreCollisions);
|
|
next;
|
|
}
|
|
|
|
lstat $dstFile;
|
|
|
|
if (-d _) {
|
|
createLinks($relName2, $srcFile, $dstFile, $ignoreCollisions);
|
|
}
|
|
|
|
elsif (-l _) {
|
|
my $target = readlink $dstFile or die;
|
|
if (!-d $target) {
|
|
die "collission between directory `$srcFile' and non-directory `$target'";
|
|
}
|
|
unlink $dstFile or die "error unlinking `$dstFile': $!";
|
|
mkpath $dstFile;
|
|
createLinks($relName2, $target, $dstFile, $ignoreCollisions);
|
|
createLinks($relName2, $srcFile, $dstFile, $ignoreCollisions);
|
|
}
|
|
|
|
else {
|
|
symLinkMkdir $srcFile, $dstFile;
|
|
}
|
|
}
|
|
|
|
elsif (-l $dstFile) {
|
|
if (!$ignoreCollisions) {
|
|
my $target = readlink $dstFile;
|
|
die "collission between `$srcFile' and `$target'";
|
|
}
|
|
}
|
|
|
|
else {
|
|
next unless isInPathsToLink($relName2);
|
|
symLinkMkdir $srcFile, $dstFile;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
my %done;
|
|
my %postponed;
|
|
|
|
sub addPkg;
|
|
sub addPkg {
|
|
my $pkgDir = shift;
|
|
my $ignoreCollisions = shift;
|
|
|
|
return if (defined $done{$pkgDir});
|
|
$done{$pkgDir} = 1;
|
|
|
|
# print "symlinking $pkgDir\n";
|
|
createLinks("", "$pkgDir", "$out", $ignoreCollisions);
|
|
|
|
my $propagatedFN = "$pkgDir/nix-support/propagated-user-env-packages";
|
|
if (-e $propagatedFN) {
|
|
open PROP, "<$propagatedFN" or die;
|
|
my $propagated = <PROP>;
|
|
close PROP;
|
|
my @propagated = split ' ', $propagated;
|
|
foreach my $p (@propagated) {
|
|
$postponed{$p} = 1 unless defined $done{$p};
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
# Symlink to the packages that have been installed explicitly by the user.
|
|
my @args = split ' ', $ENV{"paths"};
|
|
|
|
foreach my $pkgDir (@args) {
|
|
addPkg($pkgDir, $ENV{"ignoreCollisions"} eq "1");
|
|
}
|
|
|
|
|
|
# Symlink to the packages that have been "propagated" by packages
|
|
# installed by the user (i.e., package X declares that it want Y
|
|
# installed as well). We do these later because they have a lower
|
|
# priority in case of collisions.
|
|
while (scalar(keys %postponed) > 0) {
|
|
my @pkgDirs = keys %postponed;
|
|
%postponed = ();
|
|
foreach my $pkgDir (sort @pkgDirs) {
|
|
addPkg($pkgDir, 1);
|
|
}
|
|
}
|
|
|
|
|
|
print STDERR "created $symlinks symlinks in user environment\n";
|
|
|
|
|
|
my $manifest = $ENV{"manifest"};
|
|
if ($manifest ne "") {
|
|
symlink($manifest, "$out/manifest") or die "cannot create manifest";
|
|
}
|