154 lines
3.9 KiB
Perl
Executable file
154 lines
3.9 KiB
Perl
Executable file
#! @perl@ -w
|
|
|
|
use strict;
|
|
use Cwd 'abs_path';
|
|
use IO::Handle;
|
|
use File::Path;
|
|
use File::Basename;
|
|
|
|
STDOUT->autoflush(1);
|
|
|
|
my $out = $ENV{"out"};
|
|
|
|
my @pathsToLink = split ' ', $ENV{"pathsToLink"};
|
|
|
|
sub isInPathsToLink {
|
|
my $path = shift;
|
|
$path = "/" if $path eq "";
|
|
foreach my $elem (@pathsToLink) {
|
|
return 1 if
|
|
$elem eq "/" ||
|
|
(substr($path, 0, length($elem)) eq $elem
|
|
&& (($path eq $elem) || (substr($path, length($elem), 1) eq "/")));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
# For each activated package, determine what symlinks to create.
|
|
|
|
my %symlinks;
|
|
$symlinks{""} = ""; # create root directory
|
|
|
|
sub findFiles;
|
|
|
|
sub findFilesInDir {
|
|
my ($relName, $target, $ignoreCollisions) = @_;
|
|
|
|
opendir DIR, "$target" or die "cannot open `$target': $!";
|
|
my @names = readdir DIR or die;
|
|
closedir DIR;
|
|
|
|
foreach my $name (@names) {
|
|
next if $name eq "." || $name eq "..";
|
|
findFiles("$relName/$name", "$target/$name", $name, $ignoreCollisions);
|
|
}
|
|
}
|
|
|
|
sub findFiles {
|
|
my ($relName, $target, $baseName, $ignoreCollisions) = @_;
|
|
|
|
# Urgh, hacky...
|
|
return if
|
|
$relName eq "/propagated-build-inputs" ||
|
|
$relName eq "/nix-support" ||
|
|
$relName =~ /info\/dir/ ||
|
|
( $relName =~ /^\/share\/mime\// && !( $relName =~ /^\/share\/mime\/packages/ ) ) ||
|
|
$baseName eq "perllocal.pod" ||
|
|
$baseName eq "log";
|
|
|
|
my $oldTarget = $symlinks{$relName};
|
|
|
|
if (!defined $oldTarget) {
|
|
$symlinks{$relName} = $target;
|
|
return;
|
|
}
|
|
|
|
unless (-d $target && ($oldTarget eq "" || -d $oldTarget)) {
|
|
if ($ignoreCollisions) {
|
|
warn "collision between `$target' and `$oldTarget'" if $ignoreCollisions == 1;
|
|
return;
|
|
} else {
|
|
die "collision between `$target' and `$oldTarget'";
|
|
}
|
|
}
|
|
|
|
findFilesInDir($relName, $oldTarget, $ignoreCollisions) unless $oldTarget eq "";
|
|
findFilesInDir($relName, $target, $ignoreCollisions);
|
|
|
|
$symlinks{$relName} = ""; # denotes directory
|
|
}
|
|
|
|
|
|
my %done;
|
|
my %postponed;
|
|
|
|
sub addPkg;
|
|
sub addPkg($;$) {
|
|
my $pkgDir = shift;
|
|
my $ignoreCollisions = shift;
|
|
|
|
return if (defined $done{$pkgDir});
|
|
$done{$pkgDir} = 1;
|
|
|
|
findFiles("", "$pkgDir", "", $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") if -e $pkgDir;
|
|
}
|
|
|
|
|
|
# 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, 2);
|
|
}
|
|
}
|
|
|
|
|
|
# Create the symlinks.
|
|
my $nrLinks = 0;
|
|
foreach my $relName (sort keys %symlinks) {
|
|
my $target = $symlinks{$relName};
|
|
my $abs = "$out/$relName";
|
|
next unless isInPathsToLink $relName;
|
|
if ($target eq "") {
|
|
#print "creating directory $relName\n";
|
|
mkpath $abs or die "cannot create directory `$abs': $!";
|
|
} else {
|
|
#print "creating symlink $relName to $target\n";
|
|
symlink $target, $abs ||
|
|
die "error creating link `$abs': $!";
|
|
$nrLinks++;
|
|
}
|
|
}
|
|
|
|
|
|
print STDERR "created $nrLinks symlinks in user environment\n";
|
|
|
|
|
|
my $manifest = $ENV{"manifest"};
|
|
if ($manifest) {
|
|
symlink($manifest, "$out/manifest") or die "cannot create manifest";
|
|
}
|