about summary refs log tree commit diff
path: root/corepkgs/buildenv/builder.pl.in
blob: 1597ffa291786e53731ae330f814eac9bc30d062 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
#! @perl@ -w

use strict;
use Cwd;
use IO::Handle;

STDOUT->autoflush(1);

my $out = $ENV{"out"};
mkdir "$out", 0755 || die "error creating $out";


# 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 ($srcFile =~ /\/propagated-build-inputs$/ ||
            $srcFile =~ /\/nix-support$/ ||
            $srcFile =~ /\/perllocal.pod$/ ||
            $srcFile =~ /\/info\/dir$/ ||
            $srcFile =~ /\/log$/)
        {
            # Do nothing.
	}

        elsif (-d $srcFile) {

            lstat $dstFile;
            
            if (-d _) {
                createLinks($srcFile, $dstFile);
            }

            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': $!";
                mkdir $dstFile, 0755 || 
                    die "error creating directory `$dstFile': $!";
                createLinks($target, $dstFile);
                createLinks($srcFile, $dstFile);
            }

            else {
                symlink($srcFile, $dstFile) ||
                    die "error creating link `$dstFile': $!";
            }
        }

        elsif (-l $dstFile) {
            my $target = readlink $dstFile;
            die "collission between `$srcFile' and `$target'";
        }

        else {
#            print "linking $dstFile to $srcFile\n";
            symlink($srcFile, $dstFile) ||
                die "error creating link `$dstFile': $!";
        }
    }
}


my %done;

sub addPkg;
sub addPkg {
    my $pkgDir = shift;

    return if (defined $done{$pkgDir});
    $done{$pkgDir} = 1;

    print "adding $pkgDir\n";
    createLinks("$pkgDir", "$out");

    my $propagatedFN = "$pkgDir/nix-support/propagated-build-inputs";
    if (-e $propagatedFN) {
        open PROP, "<$propagatedFN" or die;
        my $propagated = <PROP>;
        close PROP;
        my @propagated = split ' ', $propagated;
        foreach my $p (@propagated) {
            addPkg $p;
        }
    }
        
}


my @args = split ' ', $ENV{"derivations"};

while (scalar @args > 0) {
    my $drvPath = shift @args;
    addPkg($drvPath);
}


symlink($ENV{"manifest"}, "$out/manifest") or die "cannot create manifest";