* Moved `nix-populate' here.

svn path=/nixpkgs/trunk/; revision=61

1 files changed, 58 insertions, 0 deletions

diff --git a/build/populate-linkdirs.pl b/build/populate-linkdirs.pl
new file mode 100755
index 00000000000..d375caa7d3d
--- /dev/null
+++ b/build/populate-linkdirs.pl
@@ -0,0 +1,58 @@
+#! /usr/bin/perl -w
+
+use strict;
+use Cwd;
+
+my $selfdir = cwd;
+
+my @dirs = ("bin", "sbin", "lib", "include");
+
+# Create the subdirectories.
+mkdir $selfdir;
+foreach my $dir (@dirs) {
+    mkdir "$selfdir/$dir";
+}
+
+# For each activated package, create symlinks.
+
+sub createLinks {
+    my $srcdir = shift;
+    my $dstdir = shift;
+
+    my @srcfiles = glob("$srcdir/*");
+
+    foreach my $srcfile (@srcfiles) {
+	my $basename = $srcfile;
+	$basename =~ s/^.*\///g; # strip directory
+	my $dstfile = "$dstdir/$basename";
+	if (-d $srcfile) {
+	    # !!! hack for resolving name clashes
+	    if (!-e $dstfile) {
+		mkdir($dstfile) or 
+		    die "error creating directory $dstfile";
+	    }
+	    -d $dstfile or die "$dstfile is not a directory";
+	    createLinks($srcfile, $dstfile);
+	} elsif (-l $dstfile) {
+	    my $target = readlink($dstfile);
+	    die "collission between $srcfile and $target";
+	} else {
+	    print "linking $dstfile to $srcfile\n";
+	    symlink($srcfile, $dstfile) or
+		die "error creating link $dstfile";
+	}
+    }
+}
+
+foreach my $name (keys %ENV) {
+
+    next unless ($name =~ /^act.*$/);
+
+    my $pkgdir = $ENV{$name};
+
+    print "merging $pkgdir\n";
+
+    foreach my $dir (@dirs) {
+	createLinks("$pkgdir/$dir", "$selfdir/$dir");
+    }
+}