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download-from-binary-cache: Use the channels of the calling user rather than root

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This should make live easier for single-user (non-daemon)
installations.  Note that when the daemon is used, the "calling user"
is root so we're not using any untrusted caches.
This commit is contained in:
Eelco Dolstra 2012-12-21 15:00:07 +01:00
parent 5ee7d8fbab
commit 68dcbb187e
2 changed files with 9 additions and 5 deletions
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10
doc/manual/conf-file.xml
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@ -341,10 +341,12 @@ build-use-chroot = /dev /proc /bin</programlisting>
<listitem><para>A list of names of files that will be read to
obtain additional binary cache URLs. The default is
<literal>/nix/var/nix/profiles/per-user/root/channels/binary-caches/*</literal>,
which ensures that Nix will use the binary caches corresponding to
the channels installed by root. Do not set this option to read
files created by untrusted users!</para></listitem>
<literal>/nix/var/nix/profiles/per-user/<replaceable>username</replaceable>/channels/binary-caches/*</literal>.
Note that when you’re using the Nix daemon,
<replaceable>username</replaceable> is always equal to
<literal>root</literal>, so Nix will only use the binary caches
provided by the channels installed by root. Do not set this
option to read files created by untrusted users!</para></listitem>
</varlistentry>

4
scripts/download-from-binary-cache.pl.in
View file

@ -36,6 +36,8 @@ my %requests;
my %scheduled;
my $caBundle = $ENV{"CURL_CA_BUNDLE"} // $ENV{"OPENSSL_X509_CERT_FILE"};
my $userName = getpwuid($<) or die "cannot figure out user name";
sub addRequest {
my ($storePath, $url, $head) = @_;
@ -195,7 +197,7 @@ sub getAvailableCaches {
# // ($Nix::Config::storeDir eq "/nix/store" ? "http://nixos.org/binary-cache" : ""));
my $urlsFiles = $Nix::Config::config{"binary-cache-files"}
// "/nix/var/nix/profiles/per-user/root/channels/binary-caches/*";
// "$Nix::Config::stateDir/profiles/per-user/$userName/channels/binary-caches/*";
foreach my $urlFile (glob $urlsFiles) {
next unless -f $urlFile;
open FILE, "<$urlFile" or die "cannot open ‘$urlFile’\n";