forked from mirrors/nixpkgs
72 lines
1.6 KiB
Perl
Executable file
72 lines
1.6 KiB
Perl
Executable file
#! /usr/bin/perl -w
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use strict;
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use Cwd;
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my $selfdir = $ENV{"out"};
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mkdir "$selfdir", 0755 || die "error creating $selfdir";
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# For each activated package, create symlinks.
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sub createLinks {
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my $srcdir = shift;
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my $dstdir = shift;
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my @srcfiles = glob("$srcdir/*");
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foreach my $srcfile (@srcfiles) {
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my $basename = $srcfile;
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$basename =~ s/^.*\///g; # strip directory
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my $dstfile = "$dstdir/$basename";
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if ($srcfile =~ /\/envpkgs$/) {
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} elsif (-d $srcfile) {
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# !!! hack for resolving name clashes
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if (!-e $dstfile) {
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mkdir $dstfile, 0755 ||
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die "error creating directory $dstfile";
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}
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-d $dstfile or die "$dstfile is not a directory";
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createLinks($srcfile, $dstfile);
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} elsif (-l $dstfile) {
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my $target = readlink($dstfile);
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die "collission between $srcfile and $target";
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} else {
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# print "linking $dstfile to $srcfile\n";
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symlink($srcfile, $dstfile) ||
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die "error creating link $dstfile";
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}
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}
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}
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my %done;
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sub addPkg {
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my $pkgdir = shift;
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return if (defined $done{$pkgdir});
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$done{$pkgdir} = 1;
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print "merging $pkgdir\n";
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createLinks("$pkgdir", "$selfdir");
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if (-f "$pkgdir/envpkgs") {
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my $envpkgs = `cat $pkgdir/envpkgs`;
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chomp $envpkgs;
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my @envpkgs = split / +/, $envpkgs;
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foreach my $envpkg (@envpkgs) {
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addPkg($envpkg);
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}
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}
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}
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foreach my $name (keys %ENV) {
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next unless ($name =~ /^act.*$/);
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my $pkgdir = $ENV{$name};
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addPkg($pkgdir);
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}
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