* Merged the SQLite branch.

1 files changed, 0 insertions, 416 deletions

diff --git a/scripts/generate-patches.pl.in b/scripts/generate-patches.pl.in
deleted file mode 100755
index dba6473508d3..000000000000
--- a/scripts/generate-patches.pl.in
+++ /dev/null
@@ -1,416 +0,0 @@
-#! @perl@ -w -I@libexecdir@/nix
-
-use strict;
-use File::Temp qw(tempdir);
-use readmanifest;
-
-
-# Some patch generations options.
-
-# Max size of NAR archives to generate patches for.
-my $maxNarSize = $ENV{"NIX_MAX_NAR_SIZE"};
-$maxNarSize = 100 * 1024 * 1024 if !defined $maxNarSize;
-
-# If patch is bigger than this fraction of full archive, reject.
-my $maxPatchFraction = $ENV{"NIX_PATCH_FRACTION"};
-$maxPatchFraction = 0.60 if !defined $maxPatchFraction;
-
-
-die unless scalar @ARGV == 5;
-
-my $hashAlgo = "sha256";
-
-my $narDir = $ARGV[0];
-my $patchesDir = $ARGV[1];
-my $patchesURL = $ARGV[2];
-my $srcManifest = $ARGV[3];
-my $dstManifest = $ARGV[4];
-
-my $tmpDir = tempdir("nix-generate-patches.XXXXXX", CLEANUP => 1, TMPDIR => 1)
-    or die "cannot create a temporary directory";
-
-print "TEMP = $tmpDir\n";
-
-#END { rmdir $tmpDir; }
-
-my %srcNarFiles;
-my %srcLocalPaths;
-my %srcPatches;
-
-my %dstNarFiles;
-my %dstLocalPaths;
-my %dstPatches;
-
-readManifest "$srcManifest",
-    \%srcNarFiles, \%srcLocalPaths, \%srcPatches;
-
-readManifest "$dstManifest",
-    \%dstNarFiles, \%dstLocalPaths, \%dstPatches;
-
-
-sub findOutputPaths {
-    my $narFiles = shift;
-
-    my %outPaths;
-    
-    foreach my $p (keys %{$narFiles}) {
-
-        # Ignore derivations.
-        next if ($p =~ /\.drv$/);
-        
-        # Ignore builders (too much ambiguity -- they're all called
-        # `builder.sh').
-        next if ($p =~ /\.sh$/);
-        next if ($p =~ /\.patch$/);
-        
-        # Don't bother including tar files etc.
-        next if ($p =~ /\.tar$/ || $p =~ /\.tar\.(gz|bz2|Z|lzma|xz)$/ || $p =~ /\.zip$/ || $p =~ /\.bin$/ || $p =~ /\.tgz$/ || $p =~ /\.rpm$/ || $p =~ /cvs-export$/ || $p =~ /fetchhg$/);
-
-        $outPaths{$p} = 1;
-    }
-
-    return %outPaths;
-}
-
-print "finding src output paths...\n";
-my %srcOutPaths = findOutputPaths \%srcNarFiles;
-
-print "finding dst output paths...\n";
-my %dstOutPaths = findOutputPaths \%dstNarFiles;
-
-
-sub getNameVersion {
-    my $p = shift;
-    $p =~ /\/[0-9a-z]+((?:-[a-zA-Z][^\/-]*)+)([^\/]*)$/;
-    my $name = $1;
-    my $version = $2;
-    return undef unless defined $name && defined $version;
-    $name =~ s/^-//;
-    $version =~ s/^-//;
-    return ($name, $version);
-}
-
-
-# A quick hack to get a measure of the `distance' between two
-# versions: it's just the position of the first character that differs
-# (or 999 if they are the same).
-sub versionDiff {
-    my $s = shift;
-    my $t = shift;
-    my $i;
-    return 999 if $s eq $t;
-    for ($i = 0; $i < length $s; $i++) {
-        return $i if $i >= length $t or
-            substr($s, $i, 1) ne substr($t, $i, 1);
-    }
-    return $i;
-}
-
-
-sub getNarBz2 {
-    my $narFiles = shift;
-    my $storePath = shift;
-    
-    my $narFileList = $$narFiles{$storePath};
-    die "missing path $storePath" unless defined $narFileList;
-
-    my $narFile = @{$narFileList}[0];
-    die unless defined $narFile;
-
-    $narFile->{url} =~ /\/([^\/]+)$/;
-    die unless defined $1;
-    return "$narDir/$1";
-}
-
-
-sub containsPatch {
-    my $patches = shift;
-    my $storePath = shift;
-    my $basePath = shift;
-    my $patchList = $$patches{$storePath};
-    return 0 if !defined $patchList;
-    my $found = 0;
-    foreach my $patch (@{$patchList}) {
-        # !!! baseHash might differ
-        return 1 if $patch->{basePath} eq $basePath;
-    }
-    return 0;
-}
-
-
-# Compute the "weighted" number of uses of a path in the build graph.
-sub computeUses {
-    my $narFiles = shift;
-    my $path = shift;
-
-    # Find the deriver of $path.
-    return 1 unless defined $$narFiles{$path};
-    my $deriver = @{$$narFiles{$path}}[0]->{deriver};
-    return 1 unless defined $deriver && $deriver ne "";
-
-#    print "  DERIVER $deriver\n";
-
-    # Optimisation: build the referrers graph from the references
-    # graph.
-    my %referrers;
-    foreach my $q (keys %{$narFiles}) {
-        my @refs = split " ", @{$$narFiles{$q}}[0]->{references};
-        foreach my $r (@refs) {
-            $referrers{$r} = [] unless defined $referrers{$r};
-            push @{$referrers{$r}}, $q;
-        }
-    }
-
-    # Determine the shortest path from $deriver to all other reachable
-    # paths in the `referrers' graph.
-
-    my %dist;
-    $dist{$deriver} = 0;
-
-    my @queue = ($deriver);
-    my $pos = 0;
-    
-    while ($pos < scalar @queue) {
-        my $p = $queue[$pos];
-        $pos++;
-
-        foreach my $q (@{$referrers{$p}}) {
-            if (!defined $dist{$q}) {
-                $dist{$q} = $dist{$p} + 1;
-#                print "    $q $dist{$q}\n";
-                push @queue, $q;
-            }
-        }
-    }
-
-    my $wuse = 1.0;
-    foreach my $user (keys %dist) {
-        next if $user eq $deriver;
-#        print "    $user $dist{$user}\n";
-        $wuse += 1.0 / 2.0**$dist{$user};
-    }
-
-#    print "    XXX $path $wuse\n";
-    
-    return $wuse;
-}
-
-
-# For each output path in the destination, see if we need to / can
-# create a patch.
-
-print "creating patches...\n";
-
-foreach my $p (keys %dstOutPaths) {
-
-    # If exactly the same path already exists in the source, skip it.
-    next if defined $srcOutPaths{$p};
-    
-    print "  $p\n";
-
-    # If not, then we should find the paths in the source that are
-    # `most' likely to be present on a system that wants to install
-    # this path.
-
-    (my $name, my $version) = getNameVersion $p;
-    next unless defined $name && defined $version;
-
-    my @closest = ();
-    my $closestVersion;
-    my $minDist = -1; # actually, larger means closer
-
-    # Find all source paths with the same name.
-
-    foreach my $q (keys %srcOutPaths) {
-        (my $name2, my $version2) = getNameVersion $q;
-	next unless defined $name2 && defined $version2;
-
-        if ($name eq $name2) {
-
-            # If the sizes differ too much, then skip.  This
-            # disambiguates between, e.g., a real component and a
-            # wrapper component (cf. Firefox in Nixpkgs).
-            my $srcSize = @{$srcNarFiles{$q}}[0]->{size};
-            my $dstSize = @{$dstNarFiles{$p}}[0]->{size};
-            my $ratio = $srcSize / $dstSize;
-            $ratio = 1 / $ratio if $ratio < 1;
-#            print "  SIZE $srcSize $dstSize $ratio $q\n";
-
-            if ($ratio >= 3) {
-                print "  SKIPPING $q due to size ratio $ratio ($srcSize $dstSize)\n";
-                next;
-            }
-
-            # If the numbers of weighted uses differ too much, then
-            # skip.  This disambiguates between, e.g., the bootstrap
-            # GCC and the final GCC in Nixpkgs.
-#            my $srcUses = computeUses \%srcNarFiles, $q;
-#            my $dstUses = computeUses \%dstNarFiles, $p;
-#            $ratio = $srcUses / $dstUses;
-#            $ratio = 1 / $ratio if $ratio < 1;
-#            print "  USE $srcUses $dstUses $ratio $q\n";
-            
-#            if ($ratio >= 2) {
-#                print "  SKIPPING $q due to use ratio $ratio ($srcUses $dstUses)\n";
-#                next;
-#            }
-
-            # If there are multiple matching names, include the ones
-            # with the closest version numbers.
-            my $dist = versionDiff $version, $version2;
-            if ($dist > $minDist) {
-                $minDist = $dist;
-                @closest = ($q);
-                $closestVersion = $version2;
-            } elsif ($dist == $minDist) {
-                push @closest, $q;
-            }
-        }
-    }
-
-    if (scalar(@closest) == 0) {
-        print "  NO BASE: $p\n";
-        next;
-    }
-
-    foreach my $closest (@closest) {
-
-        # Generate a patch between $closest and $p.
-        print "  $p <- $closest\n";
-
-        # If the patch already exists, skip it.
-        if (containsPatch(\%srcPatches, $p, $closest) ||
-            containsPatch(\%dstPatches, $p, $closest))
-        {
-            print "    skipping, already exists\n";
-            next;
-        }
-
-#        next;
-        
-        my $srcNarBz2 = getNarBz2 \%srcNarFiles, $closest;
-        my $dstNarBz2 = getNarBz2 \%dstNarFiles, $p;
-
-        if (! -f $srcNarBz2) {
-            warn "patch source archive $srcNarBz2 is missing\n";
-            next;
-        }
-
-        system("@bunzip2@ < $srcNarBz2 > $tmpDir/A") == 0
-            or die "cannot unpack $srcNarBz2";
-
-        if ((stat "$tmpDir/A")[7] >= $maxNarSize) {
-            print "    skipping, source is too large\n";
-            next;
-        }
-        
-        system("@bunzip2@ < $dstNarBz2 > $tmpDir/B") == 0
-            or die "cannot unpack $dstNarBz2";
-
-        if ((stat "$tmpDir/B")[7] >= $maxNarSize) {
-            print "    skipping, destination is too large\n";
-            next;
-        }
-        
-        system("@libexecdir@/bsdiff $tmpDir/A $tmpDir/B $tmpDir/DIFF") == 0
-            or die "cannot compute binary diff";
-
-        my $baseHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/A` or die;
-        chomp $baseHash;
-
-        my $narHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/B` or die;
-        chomp $narHash;
-
-        my $narDiffHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/DIFF` or die;
-        chomp $narDiffHash;
-
-        my $narDiffSize = (stat "$tmpDir/DIFF")[7];
-        my $dstNarBz2Size = (stat $dstNarBz2)[7];
-
-        print "    size $narDiffSize; full size $dstNarBz2Size\n";
-        
-        if ($narDiffSize >= $dstNarBz2Size) {
-            print "    rejecting; patch bigger than full archive\n";
-            next;
-        }
-    
-        if ($narDiffSize / $dstNarBz2Size >= $maxPatchFraction) {
-            print "    rejecting; patch too large relative to full archive\n";
-            next;
-        }
-    
-        my $finalName =
-            "$narDiffHash.nar-bsdiff";
-
-        if (-e "$patchesDir/$finalName") {
-            print "    not copying, already exists\n";
-        }
-
-        else {
-
-            system("cp '$tmpDir/DIFF' '$patchesDir/$finalName.tmp'") == 0
-                or die "cannot copy diff";
-            
-            rename("$patchesDir/$finalName.tmp", "$patchesDir/$finalName")
-                or die "cannot rename $patchesDir/$finalName.tmp";
-            
-        }
-        
-        # Add the patch to the manifest.
-        addPatch \%dstPatches, $p,
-            { url => "$patchesURL/$finalName", hash => "$hashAlgo:$narDiffHash"
-            , size => $narDiffSize, basePath => $closest, baseHash => "$hashAlgo:$baseHash"
-            , narHash => "$hashAlgo:$narHash", patchType => "nar-bsdiff"
-            }, 0;
-    }
-}
-
-
-# Add in any potentially useful patches in the source (namely, those
-# patches that produce either paths in the destination or paths that
-# can be used as the base for other useful patches).
-
-print "propagating patches...\n";
-
-my $changed;
-do {
-    # !!! we repeat this to reach the transitive closure; inefficient
-    $changed = 0;
-
-    print "loop\n";
-
-    my %dstBasePaths;
-    foreach my $q (keys %dstPatches) {
-	foreach my $patch (@{$dstPatches{$q}}) {
-	    $dstBasePaths{$patch->{basePath}} = 1;
-	}
-    }
-
-    foreach my $p (keys %srcPatches) {
-        my $patchList = $srcPatches{$p};
-
-        my $include = 0;
-
-        # Is path $p included in the destination?  If so, include
-        # patches that produce it.
-        $include = 1 if defined $dstNarFiles{$p};
-
-        # Is path $p a path that serves as a base for paths in the
-        # destination?  If so, include patches that produce it.
-	# !!! check baseHash
-        $include = 1 if defined $dstBasePaths{$p};
-
-        if ($include) {
-            foreach my $patch (@{$patchList}) {
-                $changed = 1 if addPatch \%dstPatches, $p, $patch;
-            }
-        }
-        
-    }
-    
-} while $changed;
-
-
-# Rewrite the manifest of the destination (with the new patches).
-writeManifest "${dstManifest}",
-    \%dstNarFiles, \%dstPatches;