258 lines
6.8 KiB
Text
258 lines
6.8 KiB
Text
#! @perl@ -w -I@libexecdir@/nix
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use strict;
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use POSIX qw(tmpnam);
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use readmanifest;
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my $hashAlgo = "sha256";
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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 $nixfile = "$tmpdir/create-nars.nix";
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my $manifest = "$tmpdir/MANIFEST";
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END { unlink $manifest; unlink $nixfile; rmdir $tmpdir; }
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my $curl = "@curl@ --fail --silent";
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my $extraCurlFlags = ${ENV{'CURL_FLAGS'}};
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$curl = "$curl $extraCurlFlags" if defined $extraCurlFlags;
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my $binDir = $ENV{"NIX_BIN_DIR"};
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$binDir = "@bindir@" unless defined $binDir;
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my $dataDir = $ENV{"NIX_DATA_DIR"};
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$dataDir = "@datadir@" unless defined $dataDir;
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# Parse the command line.
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my $localCopy;
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my $localArchivesDir;
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my $localManifestFile;
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my $archivesPutURL;
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my $archivesGetURL;
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my $manifestPutURL;
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if ($ARGV[0] eq "--copy") {
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die "syntax: nix-push --copy ARCHIVES_DIR MANIFEST_FILE PATHS...\n" if scalar @ARGV < 3;
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$localCopy = 1;
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shift @ARGV;
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$localArchivesDir = shift @ARGV;
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$localManifestFile = shift @ARGV;
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}
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else {
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die "syntax: nix-push ARCHIVES_PUT_URL ARCHIVES_GET_URL " .
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"MANIFEST_PUT_URL PATHS...\n" if scalar @ARGV < 3;
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$localCopy = 0;
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$archivesPutURL = shift @ARGV;
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$archivesGetURL = shift @ARGV;
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$manifestPutURL = shift @ARGV;
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}
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# From the given store paths, determine the set of requisite store
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# paths, i.e, the paths required to realise them.
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my %storePaths;
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foreach my $path (@ARGV) {
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die unless $path =~ /^\//;
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# Get all paths referenced by the normalisation of the given
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# Nix expression.
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my $pid = open(READ,
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"$binDir/nix-store --query --requisites --force-realise " .
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"--include-outputs '$path'|") or die;
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while (<READ>) {
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chomp;
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die "bad: $_" unless /^\//;
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$storePaths{$_} = "";
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}
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close READ or die "nix-store failed: $?";
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}
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my @storePaths = keys %storePaths;
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# For each path, create a Nix expression that turns the path into
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# a Nix archive.
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open NIX, ">$nixfile";
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print NIX "[";
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foreach my $storePath (@storePaths) {
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die unless ($storePath =~ /\/[0-9a-z]{32}.*$/);
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# Construct a Nix expression that creates a Nix archive.
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# !!! the string reference to `$storePath' is impure! We could
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# also pass it as a normal input, but that would cause it to be
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# copied, and its name would be expanded (e.g.,
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# /nix/store/HASH1-HASH2-symname). nix-instantiate should be
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# smart enough to add store paths as direct references of the Nix
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# expression.
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my $nixexpr =
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"((import $dataDir/nix/corepkgs/nar/nar.nix) " .
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"{path = \"$storePath\"; system = \"@system@\"; hashAlgo = \"$hashAlgo\";}) ";
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print NIX $nixexpr;
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}
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print NIX "]";
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close NIX;
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# Instantiate store expressions from the Nix expression.
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my @storeExprs;
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print STDERR "instantiating store expressions...\n";
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my $pid = open(READ, "$binDir/nix-instantiate $nixfile|")
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or die "cannot run nix-instantiate";
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while (<READ>) {
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chomp;
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die unless /^\//;
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push @storeExprs, $_;
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}
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close READ or die "nix-instantiate failed: $?";
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# Realise the store expressions.
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print STDERR "creating archives...\n";
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my @narPaths;
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my @tmp = @storeExprs;
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while (scalar @tmp > 0) {
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my $n = scalar @tmp;
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if ($n > 256) { $n = 256 };
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my @tmp2 = @tmp[0..$n - 1];
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@tmp = @tmp[$n..scalar @tmp - 1];
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# Note: we disable build hooks because of the impure path
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# reference (see above). Even if that is fixed, using a hook
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# probably wouldn't make that much sense; pumping lots of data
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# around just to compress them won't gain that much.
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$ENV{"NIX_BUILD_HOOK"} = "";
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my $pid = open(READ, "$binDir/nix-store --realise @tmp2|")
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or die "cannot run nix-store";
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while (<READ>) {
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chomp;
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die unless (/^\//);
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push @narPaths, "$_";
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}
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close READ or die "nix-store failed: $?";
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}
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# Create the manifest.
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print STDERR "creating manifest...\n";
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my %narFiles;
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my %patches;
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my @narArchives;
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for (my $n = 0; $n < scalar @storePaths; $n++) {
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my $storePath = $storePaths[$n];
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my $narDir = $narPaths[$n];
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$storePath =~ /\/([^\/]*)$/;
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my $basename = $1;
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defined $basename or die;
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open HASH, "$narDir/narbz2-hash" or die "cannot open narbz2-hash";
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my $narbz2Hash = <HASH>;
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chomp $narbz2Hash;
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$narbz2Hash =~ /^[0-9a-z]+$/ or die "invalid hash";
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close HASH;
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open HASH, "$narDir/nar-hash" or die "cannot open nar-hash";
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my $narHash = <HASH>;
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chomp $narHash;
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$narHash =~ /^[0-9a-z]+$/ or die "invalid hash";
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close HASH;
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my $narName = "$narbz2Hash.nar.bz2";
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my $narFile = "$narDir/$narName";
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(-f $narFile) or die "narfile for $storePath not found";
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push @narArchives, $narFile;
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my $narbz2Size = (stat $narFile)[7];
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my $references = `$binDir/nix-store --query --references '$storePath'`;
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die "cannot query references for `$storePath'" if $? != 0;
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$references = join(" ", split(" ", $references));
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my $deriver = `$binDir/nix-store --query --deriver '$storePath'`;
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die "cannot query deriver for `$storePath'" if $? != 0;
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chomp $deriver;
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$deriver = "" if $deriver eq "unknown-deriver";
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my $url;
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if ($localCopy) {
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$url = "file://$localArchivesDir/$narName";
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} else {
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$url = "$archivesGetURL/$narName";
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}
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$narFiles{$storePath} = [
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{ url => $url
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, hash => "$hashAlgo:$narbz2Hash"
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, size => $narbz2Size
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, narHash => "$hashAlgo:$narHash"
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, references => $references
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, deriver => $deriver
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}
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];
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}
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writeManifest $manifest, \%narFiles, \%patches;
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sub copyFile {
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my $src = shift;
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my $dst = shift;
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system("cp '$src' '$dst.tmp'") == 0 or die "cannot copy file";
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rename("$dst.tmp", "$dst") or die "cannot rename file";
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}
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# Upload the archives.
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print STDERR "uploading archives...\n";
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sub archiveExists {
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my $name = shift;
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print STDERR " HEAD on $archivesGetURL/$name\n";
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return system("$curl --head $archivesGetURL/$name > /dev/null") == 0;
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}
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foreach my $narArchive (@narArchives) {
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$narArchive =~ /\/([^\/]*)$/;
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my $basename = $1;
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if ($localCopy) {
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if (! -f "$localArchivesDir/$basename") {
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print STDERR " $narArchive\n";
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copyFile $narArchive, "$localArchivesDir/$basename";
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}
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}
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else {
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if (!archiveExists("$basename")) {
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print STDERR " $narArchive\n";
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system("$curl --show-error --upload-file " .
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"'$narArchive' '$archivesPutURL/$basename' > /dev/null") == 0 or
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die "curl failed on $narArchive: $?";
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}
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}
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}
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# Upload the manifest.
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print STDERR "uploading manifest...\n";
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if ($localCopy) {
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copyFile $manifest, $localManifestFile;
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} else {
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system("$curl --show-error --upload-file " .
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"'$manifest' '$manifestPutURL' > /dev/null") == 0 or
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die "curl failed on $manifest: $?";
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}
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