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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#! @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;
my %priorities;
# For each activated package, create symlinks.
sub createLinks {
my $srcDir = shift;
my $dstDir = shift;
my $priority = shift;
my @srcFiles = glob("$srcDir/*");
foreach my $srcFile (@srcFiles) {
my $baseName = $srcFile;
$baseName =~ s/^.*\///g; # strip directory
my $dstFile = "$dstDir/$baseName";
# The files below are special-cased so that they don't show up
# in user profiles, either because they are useless, or
# because they would cause pointless collisions (e.g., each
# Python package brings its own
# `$out/lib/pythonX.Y/site-packages/easy-install.pth'.)
# Urgh, hacky...
if ($srcFile =~ /\/propagated-build-inputs$/ ||
$srcFile =~ /\/nix-support$/ ||
$srcFile =~ /\/perllocal.pod$/ ||
$srcFile =~ /\/easy-install.pth$/ ||
$srcFile =~ /\/info\/dir$/ ||
$srcFile =~ /\/log$/)
{
# Do nothing.
}
elsif (-d $srcFile) {
lstat $dstFile;
if (-d _) {
createLinks($srcFile, $dstFile, $priority);
}
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, $priorities{$dstFile});
createLinks($srcFile, $dstFile, $priority);
}
else {
symlink($srcFile, $dstFile) ||
die "error creating link `$dstFile': $!";
$priorities{$dstFile} = $priority;
$symlinks++;
}
}
else {
if (-l $dstFile) {
my $target = readlink $dstFile;
my $prevPriority = $priorities{$dstFile};
die ( "Collission between `$srcFile' and `$target'. "
. "Suggested solution: use `nix-env --set-flag "
. "priority NUMBER PKGNAME' to change the priority of "
. "one of the conflicting packages.\n" )
if $prevPriority == $priority;
next if $prevPriority < $priority;
unlink $dstFile or die;
}
symlink($srcFile, $dstFile) ||
die "error creating link `$dstFile': $!";
$priorities{$dstFile} = $priority;
$symlinks++;
}
}
}
my %done;
my %postponed;
sub addPkg;
sub addPkg {
my $pkgDir = shift;
my $priority = shift;
return if (defined $done{$pkgDir});
$done{$pkgDir} = 1;
# print "symlinking $pkgDir\n";
createLinks("$pkgDir", "$out", $priority);
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};
}
}
}
# Convert the stuff we get from the environment back into a coherent
# data type.
my @paths = split ' ', $ENV{"paths"};
my @active = split ' ', $ENV{"active"};
my @priority = split ' ', $ENV{"priority"};
die if scalar @paths != scalar @active;
die if scalar @paths != scalar @priority;
my %pkgs;
for (my $n = 0; $n < scalar @paths; $n++) {
$pkgs{$paths[$n]} =
{ active => $active[$n]
, priority => $priority[$n] };
}
# Symlink to the packages that have been installed explicitly by the
# user.
foreach my $pkg (sort (keys %pkgs)) {
#print $pkg, " ", $pkgs{$pkg}->{priority}, "\n";
addPkg($pkg, $pkgs{$pkg}->{priority}) if $pkgs{$pkg}->{active} ne "false";
}
# 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.
my $priorityCounter = 1000; # don't care about collisions
while (scalar(keys %postponed) > 0) {
my @pkgDirs = keys %postponed;
%postponed = ();
foreach my $pkgDir (sort @pkgDirs) {
addPkg($pkgDir, $priorityCounter++);
}
}
print STDERR "created $symlinks symlinks in user environment\n";
symlink($ENV{"manifest"}, "$out/manifest") or die "cannot create manifest";
|
