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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
#! @perl@ -w
use strict;
use Cwd;
use IO::Handle;
STDOUT->autoflush(1);
my $out = $ENV{"out"};
mkdir "$out", 0755 || die "error creating $out";
my $symlinks = 0;
# For each activated package, create symlinks.
sub createLinks {
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/$baseName";
# Urgh, hacky...
if ($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, $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': $!";
mkdir $dstFile, 0755 ||
die "error creating directory `$dstFile': $!";
createLinks($target, $dstFile, $ignoreCollisions);
createLinks($srcFile, $dstFile, $ignoreCollisions);
}
else {
symlink($srcFile, $dstFile) ||
die "error creating link `$dstFile': $!";
$symlinks++;
}
}
elsif (-l $dstFile) {
if (!$ignoreCollisions) {
my $target = readlink $dstFile;
die "collission between `$srcFile' and `$target'";
}
}
else {
symlink($srcFile, $dstFile) ||
die "error creating link `$dstFile': $!";
$symlinks++;
}
}
}
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-build-inputs";
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{"derivations"};
foreach my $pkgDir (sort @args) {
addPkg($pkgDir, 0);
}
# 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 $symlinks symlinks in user environment\n";
symlink($ENV{"manifest"}, "$out/manifest") or die "cannot create manifest";
|
