forked from lix-project/lix
* Adapted nix-pull to use the new substitute mechanism.
This commit is contained in:
Eelco Dolstra
parent
3f3a3ae87b
commit
37ee6cef99
8 changed files with 99 additions and 58 deletions
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@ -152,6 +152,7 @@ AC_CONFIG_FILES([Makefile
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corepkgs/nar/Makefile
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corepkgs/buildenv/Makefile
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corepkgs/channels/Makefile
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corepkgs/nix-pull/Makefile
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doc/Makefile
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doc/manual/Makefile
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misc/Makefile
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@ -1 +1 @@
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SUBDIRS = fetchurl nar buildenv channels
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SUBDIRS = fetchurl nar buildenv channels nix-pull
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11
corepkgs/nix-pull/Makefile.am
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11
corepkgs/nix-pull/Makefile.am
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@ -0,0 +1,11 @@
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all-local: builder.sh
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install-exec-local:
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$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs
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$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs/nix-pull
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$(INSTALL_DATA) default.nix $(DESTDIR)$(datadir)/nix/corepkgs/nix-pull
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$(INSTALL_PROGRAM) builder.sh $(DESTDIR)$(datadir)/nix/corepkgs/nix-pull
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include ../../substitute.mk
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EXTRA_DIST = default.nix builder.sh.in
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34
corepkgs/nix-pull/builder.sh.in
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34
corepkgs/nix-pull/builder.sh.in
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@ -0,0 +1,34 @@
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#! @shell@ -e
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export PATH=/bin:/usr/bin
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mkdir $out
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cat > $out/fetch <<EOF
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#! @shell@ -e
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export PATH=/bin:/usr/bin
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echo "downloading \$2..."
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export PRINT_PATH=1
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result=(\$(@bindir@/nix-prefetch-url \$2))
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hash=\${result[0]}
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path=\${result[1]}
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if test "\$hash" != "\$3"; then
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echo "hash is \$hash, expected \$3"
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exit 1
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fi
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echo "unpacking into \$1..."
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if ! @bunzip2@ < "\$path" | @bindir@/nix-store --restore "\$1"; then
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exit 1
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fi
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exit 0
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EOF
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chmod +x $out/fetch
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7
corepkgs/nix-pull/default.nix
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7
corepkgs/nix-pull/default.nix
Normal file
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@ -0,0 +1,7 @@
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{system}:
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derivation {
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name = "nix-pull";
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builder = ./builder.sh;
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inherit system;
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}
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@ -25,13 +25,17 @@ test -e $tmpPath2 || mv $tmpPath1 $tmpPath2 # !!! race
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storeExpr=$( \
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echo "(import @datadir@/nix/corepkgs/fetchurl) \
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{url = $url; md5 = \"$hash\"; system = \"@system@\";}" \
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| nix-instantiate -)
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| @bindir@/nix-instantiate -)
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# Realise it.
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finalPath=$(nix-store -qnB --force-realise $storeExpr)
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finalPath=$(@bindir@/nix-store -qnB --force-realise $storeExpr)
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echo "path is $finalPath" >&2
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rm -rf $tmpPath2 || true
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echo $hash
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if test -n "$PRINT_PATH"; then
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echo $finalPath
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fi
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@ -10,18 +10,18 @@ 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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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 %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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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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@ -29,7 +29,7 @@ if (scalar @ARGV > 0) {
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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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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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@ -41,60 +41,44 @@ if (scalar @ARGV > 0) {
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}
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# Create a Nix expression for the substitutes.
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my $fullexpr = "[";
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my @storepaths;
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foreach my $storepath (keys %storepaths2urls) {
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# Construct a Nix expression that fetches and unpacks a
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# Nix archive from the network.
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my $url = $storepaths2urls{$storepath};
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my $hash = $urls2hashes{$url};
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my $fetch =
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"(import @datadir@/nix/corepkgs/fetchurl) " .
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"{url = $url; md5 = \"$hash\"; system = \"@system@\";}";
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my $nixexpr =
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"((import @datadir@/nix/corepkgs/nar/unnar.nix) " .
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"{narFile = ($fetch); outPath = \"$storepath\"; system = \"@system@\";}) ";
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$fullexpr .= $nixexpr; # !!! O(n^2)?
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push @storepaths, $storepath;
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}
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$fullexpr .= "]";
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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 store expressions from the Nix expressions we created above.
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print STDERR "instantiating store expressions...\n";
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my $pid = open2(\*READ, \*WRITE, "@bindir@/nix-instantiate -") or die "cannot run nix-instantiate";
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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 WRITE $fullexpr;
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close WRITE;
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my $i = 0;
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my %substitutes;
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while (<READ>) {
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chomp;
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die unless /^\//;
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my $subpath = $_;
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die unless ($i < scalar @storepaths);
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$substitutes{$storepaths[$i++]} = $subpath;
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}
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waitpid $pid, 0;
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$? == 0 or die "nix-instantiate failed";
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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 @subs = %substitutes;
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while (scalar @subs > 0) {
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my $n = scalar @subs;
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if ($n > 256) { $n = 256 };
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my @subs2 = @subs[0..$n - 1];
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@subs = @subs[$n..scalar @subs - 1];
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system "@bindir@/nix-store --substitute @subs2";
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if ($?) { die "`nix-store --substitute' failed"; }
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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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@ -3,7 +3,7 @@ use strict;
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sub processURL {
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my $manifest = shift;
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my $url = shift;
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my $storepaths2urls = shift;
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my $storePaths2urls = shift;
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my $urls2hashes = shift;
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my $successors = shift;
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@ -18,7 +18,7 @@ sub processURL {
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my $inside = 0;
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my $storepath;
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my $storePath;
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my $narurl;
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my $hash;
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my @preds;
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@ -31,7 +31,7 @@ sub processURL {
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if (!$inside) {
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if (/^\{$/) {
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$inside = 1;
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undef $storepath;
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undef $storePath;
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undef $narurl;
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undef $hash;
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@preds = ();
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@ -41,16 +41,16 @@ sub processURL {
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if (/^\}$/) {
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$inside = 0;
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$$storepaths2urls{$storepath} = $narurl;
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$$storePaths2urls{$storePath} = $narurl;
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$$urls2hashes{$narurl} = $hash;
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foreach my $p (@preds) {
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$$successors{$p} = $storepath;
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$$successors{$p} = $storePath;
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}
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}
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elsif (/^\s*StorePath:\s*(\/\S+)\s*$/) {
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$storepath = $1;
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$storePath = $1;
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}
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elsif (/^\s*NarURL:\s*(\S+)\s*$/) {
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$narurl = $1;
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