1a16afabba
git-svn-id: https://nixos.org/repos/nix/release/trunk/channels@19658 70bd8c7a-acb8-0310-9f0d-9cc1c95dcdbb
88 lines
2.7 KiB
Perl
88 lines
2.7 KiB
Perl
use strict;
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use readmanifest;
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use File::Basename;
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use File::stat;
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use File::Temp qw/tempfile/;
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use Fcntl ':flock';
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if (scalar @ARGV != 3 && scalar @ARGV != 4) {
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print STDERR "Syntax: perl mirror-channel.pl <src-channel-url> <dst-channel-url> <dst-channel-dir> [<nix-exprs-url>]\n";
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exit 1;
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}
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my $curl = "curl --location --silent --show-error --fail";
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my $srcChannelURL = $ARGV[0];
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my $dstChannelURL = $ARGV[1];
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my $dstChannelPath = $ARGV[2];
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my $nixexprsURL = $ARGV[3] || "$srcChannelURL/nixexprs.tar.bz2";
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die "$dstChannelPath doesn't exist\n" unless -d $dstChannelPath;
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open LOCK, ">$dstChannelPath/.lock" or die;
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flock LOCK, LOCK_EX;
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my ($fh, $tmpManifest) = tempfile(UNLINK => 1);
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system("$curl '$srcChannelURL/MANIFEST' > $tmpManifest") == 0 or die;
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# Read the manifest.
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my %narFiles;
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my %localPaths;
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my %patches;
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my $version = readManifest($tmpManifest, \%narFiles, \%localPaths, \%patches);
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%localPaths = ();
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%patches = (); # not supported yet
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my $size = scalar (keys %narFiles);
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print "$size store paths in manifest\n";
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# Download every file that we don't already have, and update every URL
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# to point to the mirror. Also fill in the size and hash fields in
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# the manifest in order to be compatible with Nix < 0.13.
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while (my ($storePath, $files) = each %narFiles) {
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foreach my $file (@{$files}) {
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my $narHash = $file->{narHash};
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my $srcURL = $file->{url};
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my $dstName = $narHash;
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$dstName =~ s/:/_/; # `:' in filenames might cause problems
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my $dstFile = "$dstChannelPath/$dstName";
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my $dstURL = "$dstChannelURL/$dstName";
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$file->{url} = $dstURL;
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if (! -e $dstFile) {
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print "downloading $srcURL\n";
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my $dstFileTmp = "$dstChannelPath/.tmp.$$.nar.$dstName";
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system("$curl '$srcURL' > $dstFileTmp") == 0 or die;
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rename($dstFileTmp, $dstFile) or die "cannot rename $dstFileTmp";
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}
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$file->{size} = stat($dstFile)->size or die;
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my $hashFile = "$dstChannelPath/.hash.$dstName";
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my $hash;
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if (-e $hashFile) {
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open HASH, "<$hashFile" or die;
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$hash = <HASH>;
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close HASH;
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} else {
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$hash = `nix-hash --flat --type sha256 --base32 '$dstFile'` or die;
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chomp $hash;
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open HASH, ">$hashFile" or die;
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print HASH $hash;
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close HASH;
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}
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$file->{hash} = "sha256:$hash";
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}
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}
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# Write the new manifest.
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writeManifest("$dstChannelPath/MANIFEST", \%narFiles, \%patches);
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# Mirror nixexprs.tar.bz2.
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my $tmpFile = "$dstChannelPath/.tmp.$$.nixexprs.tar.bz2";
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system("$curl '$nixexprsURL' > $tmpFile") == 0 or die;
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rename($tmpFile, "$dstChannelPath/nixexprs.tar.bz2") or die "cannot rename $tmpFile";
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