forked from lix-project/lix
94 lines
2.2 KiB
Plaintext
94 lines
2.2 KiB
Plaintext
#! @perl@ -w -I@libexecdir@/nix
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use strict;
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use IPC::Open2;
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use POSIX qw(tmpnam);
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use readmanifest;
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my $tmpdir;
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do { $tmpdir = tmpnam(); }
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until mkdir $tmpdir, 0777;
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my $manifest = "$tmpdir/manifest";
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my $confFile = "@sysconfdir@/nix/prebuilts.conf";
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#END { unlink $manifest; rmdir $tmpdir; }
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# Obtain URLs either from the command line or from a configuration file.
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my %storePaths2urls;
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my %urls2hashes;
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my %successors;
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sub doURL {
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my $url = shift;
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processURL $manifest, $url, \%storePaths2urls, \%urls2hashes, \%successors;
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}
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if (scalar @ARGV > 0) {
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while (@ARGV) {
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my $url = shift @ARGV;
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doURL $url;
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}
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} else {
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open CONFFILE, "<$confFile";
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while (<CONFFILE>) {
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chomp;
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if (/^\s*(\S+)\s*(\#.*)?$/) {
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my $url = $1;
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doURL $url;
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}
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}
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close CONFFILE;
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}
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my $size = scalar (keys %storePaths2urls);
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print "$size store paths in manifest\n";
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# Instantiate a store expression that builds the substitute program
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# (the program that fetches URLs and unpacks them into the store).
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my $nixExpr =
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"(import @datadir@/nix/corepkgs/nix-pull) " .
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"{system = \"@system@\";}";
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print STDERR "instantiating store expression...\n";
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my $storeExpr = `echo '$nixExpr' | @bindir@/nix-instantiate -`
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or die "cannot instantiate Nix expression";
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chomp $storeExpr;
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# Register all substitutes.
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print STDERR "registering substitutes...\n";
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my $pid = open2(\*READ, \*WRITE, "@bindir@/nix-store --substitute")
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or die "cannot run nix-store";
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close READ;
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foreach my $storePath (keys %storePaths2urls) {
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print WRITE "$storePath\n";
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print WRITE "$storeExpr\n";
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print WRITE "/fetch\n";
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print WRITE "2\n";
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print WRITE "$storePaths2urls{$storePath}\n";
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print WRITE "$urls2hashes{$storePaths2urls{$storePath}}\n";
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}
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close WRITE;
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waitpid $pid, 0;
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$? == 0 or die "nix-store failed";
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# Register all successors.
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print STDERR "registering successors...\n";
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my @sucs = %successors;
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while (scalar @sucs > 0) {
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my $n = scalar @sucs;
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if ($n > 256) { $n = 256 };
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my @sucs2 = @sucs[0..$n - 1];
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@sucs = @sucs[$n..scalar @sucs - 1];
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system "@bindir@/nix-store --successor @sucs2";
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if ($?) { die "`nix-store --successor' failed"; }
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}
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