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* Made nix-pull much faster by performing all Fix instantiations at

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the same time.
This commit is contained in:
Eelco Dolstra 2003-08-05 11:14:24 +00:00
parent 17f05dba77
commit fd30f52cfc
1 changed files with 32 additions and 14 deletions
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44
scripts/nix-pull.in
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@ -3,9 +3,15 @@
my $tmpfile = "@localstatedir@/nix/pull.tmp";
my $conffile = "@sysconfdir@/nix/prebuilts.conf";
my @ids;
my @subs;
my @sucs;
my $fixfile = "/tmp/nix-pull-tmp.fix";
open FIX, ">$fixfile";
print FIX "[";
my $first = 1;
open CONFFILE, "<$conffile";
while (<CONFFILE>) {
@ -41,7 +47,7 @@ while (<CONFFILE>) {
$outname = "unnamed";
}
print "registering $id -> $url/$fn\n";
print STDERR "$id ($outname)\n";
# Construct a Fix expression that fetches and unpacks a
# Nix archive from the network.
@ -55,23 +61,14 @@ while (<CONFFILE>) {
", (\"id\", \"$id\")" .
"])";
my $fixfile = "/tmp/nix-pull-tmp.fix";
open FIX, ">$fixfile";
print FIX "," unless ($first);
$first = 0;
print FIX $fixexpr;
close FIX;
# Instantiate a Nix expression from the Fix expression.
my $nid = `fix $fixfile`;
$? and die "instantiating Nix archive expression";
chomp $nid;
die unless $nid =~ /^([0-9a-z]{32})$/;
push @subs, $id;
push @subs, $nid;
push @ids, $id;
# Does the name encode a successor relation?
if (defined $fsid) {
print "NORMAL $fsid -> $id\n";
push @sucs, $fsid;
push @sucs, $id;
}
@ -84,8 +81,29 @@ while (<CONFFILE>) {
}
print FIX "]";
close FIX;
# Instantiate Nix expressions from the Fix expressions we created above.
print STDERR "running fix...\n";
open NIDS, "fix $fixfile |" or die "cannot run fix";
my $i = 0;
while (<NIDS>) {
chomp;
die unless /^([0-9a-z]{32})$/;
$nid = $1;
die unless ($i < scalar @ids);
$id = $ids[$i++];
push @subs, $id;
push @subs, $nid;
}
# Register all substitutes.
print STDERR "registering substitutes...\n";
system "nix --substitute @subs";
if ($?) { die "`nix --substitute' failed"; }
# Register all successors.
print STDERR "registering successors...\n";
system "nix --successor @sucs";
if ($?) { die "`nix --successor' failed"; }