* Move the patch generator into a module.

This commit is contained in:
Eelco Dolstra 2010-11-29 15:26:28 +00:00
parent 9737a7eba0
commit d3bba0c2d8
4 changed files with 345 additions and 437 deletions

335
scripts/GeneratePatches.pm.in Executable file
View file

@ -0,0 +1,335 @@
#! @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 = 160 * 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;
my $timeLimit = $ENV{"NIX_BSDIFF_TIME_LIMIT"};
$timeLimit = 180 if !defined $timeLimit;
my $hashAlgo = "sha256";
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;
}
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 $narPath = shift;
my $narFiles = shift;
my $storePath = shift;
my $narFileList = $$narFiles{$storePath};
die "missing path $storePath" unless defined $narFileList;
my $narFile = @{$narFileList}[0];
die unless defined $narFile;
$narFile->{url} =~ /\/([^\/]+)$/;
die unless defined $1;
return "$narPath/$1";
}
sub containsPatch {
my $patches = shift;
my $storePath = shift;
my $basePath = shift;
my $patchList = $$patches{$storePath};
return 0 if !defined $patchList;
my $found = 0;
foreach my $patch (@{$patchList}) {
# !!! baseHash might differ
return 1 if $patch->{basePath} eq $basePath;
}
return 0;
}
sub generatePatches {
my ($srcNarFiles, $dstNarFiles, $srcPatches, $dstPatches, $narPath, $patchesPath, $patchesURL, $tmpDir) = @_;
my %srcOutPaths = findOutputPaths $srcNarFiles;
my %dstOutPaths = findOutputPaths $dstNarFiles;
# For each output path in the destination, see if we need to / can
# create a patch.
print STDERR "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) {
my $srcSystem = @{$$dstNarFiles{$p}}[0]->{system};
my $dstSystem = @{$$srcNarFiles{$q}}[0]->{system};
if (defined $srcSystem && defined $dstSystem && $srcSystem ne $dstSystem) {
print " SKIPPING $q due to different systems ($srcSystem vs. $dstSystem)\n";
next;
}
# 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 vs. $dstSize)\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 STDERR " $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;
}
my $srcNarBz2 = getNarBz2 $narPath, $srcNarFiles, $closest;
my $dstNarBz2 = getNarBz2 $narPath, $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;
}
my $time1 = time();
my $res = system("ulimit -t $timeLimit; @libexecdir@/bsdiff $tmpDir/A $tmpDir/B $tmpDir/DIFF");
my $time2 = time();
if ($res) {
warn "binary diff computation aborted after ", $time2 - $time1, " seconds\n";
next;
}
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; ", $time2 - $time1, " seconds\n";
if ($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 "$patchesPath/$finalName") {
print " not copying, already exists\n";
}
else {
system("cp '$tmpDir/DIFF' '$patchesPath/$finalName.tmp'") == 0
or die "cannot copy diff";
rename("$patchesPath/$finalName.tmp", "$patchesPath/$finalName")
or die "cannot rename $patchesPath/$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"
};
}
}
}
# Propagate useful patches from $srcPatches to $dstPatches. A patch
# is useful if it produces either paths in the $dstNarFiles or paths
# that can be used as the base for other useful patches.
sub propagatePatches {
my ($srcPatches, $dstNarFiles, $dstPatches) = @_;
print STDERR "propagating patches...\n";
my $changed;
do {
# !!! we repeat this to reach the transitive closure; inefficient
$changed = 0;
print STDERR "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 $$dstNarFiles{$p};
# Is path $p a path that serves as a base for paths in the
# destination? If so, include patches that produce it.
# !!! check baseHash
$include = 1 if defined $dstBasePaths{$p};
if ($include) {
foreach my $patch (@{$patchList}) {
$changed = 1 if addPatch $dstPatches, $p, $patch;
}
}
}
} while $changed;
}
# Add all new patches in $srcPatches to $dstPatches.
sub copyPatches {
my ($srcPatches, $dstPatches) = @_;
foreach my $p (keys %{$srcPatches}) {
addPatch $dstPatches, $p, $_ foreach @{$$srcPatches{$p}};
}
}
return 1;

View file

@ -3,7 +3,7 @@ bin_SCRIPTS = nix-collect-garbage \
nix-install-package nix-channel nix-build \ nix-install-package nix-channel nix-build \
nix-copy-closure nix-copy-closure
noinst_SCRIPTS = nix-profile.sh generate-patches.pl \ noinst_SCRIPTS = nix-profile.sh GeneratePatches.pm \
find-runtime-roots.pl build-remote.pl nix-reduce-build \ find-runtime-roots.pl build-remote.pl nix-reduce-build \
copy-from-other-stores.pl nix-http-export.cgi copy-from-other-stores.pl nix-http-export.cgi
@ -17,7 +17,7 @@ install-exec-local: readmanifest.pm download-using-manifests.pl copy-from-other-
$(INSTALL_DATA) readconfig.pm $(DESTDIR)$(libexecdir)/nix $(INSTALL_DATA) readconfig.pm $(DESTDIR)$(libexecdir)/nix
$(INSTALL_DATA) ssh.pm $(DESTDIR)$(libexecdir)/nix $(INSTALL_DATA) ssh.pm $(DESTDIR)$(libexecdir)/nix
$(INSTALL_PROGRAM) find-runtime-roots.pl $(DESTDIR)$(libexecdir)/nix $(INSTALL_PROGRAM) find-runtime-roots.pl $(DESTDIR)$(libexecdir)/nix
$(INSTALL_PROGRAM) generate-patches.pl $(DESTDIR)$(libexecdir)/nix $(INSTALL_PROGRAM) GeneratePatches.pm $(DESTDIR)$(libexecdir)/nix
$(INSTALL_PROGRAM) build-remote.pl $(DESTDIR)$(libexecdir)/nix $(INSTALL_PROGRAM) build-remote.pl $(DESTDIR)$(libexecdir)/nix
$(INSTALL) -d $(DESTDIR)$(libexecdir)/nix/substituters $(INSTALL) -d $(DESTDIR)$(libexecdir)/nix/substituters
$(INSTALL_PROGRAM) download-using-manifests.pl $(DESTDIR)$(libexecdir)/nix/substituters $(INSTALL_PROGRAM) download-using-manifests.pl $(DESTDIR)$(libexecdir)/nix/substituters
@ -36,7 +36,7 @@ EXTRA_DIST = nix-collect-garbage.in \
nix-build.in \ nix-build.in \
download-using-manifests.pl.in \ download-using-manifests.pl.in \
copy-from-other-stores.pl.in \ copy-from-other-stores.pl.in \
generate-patches.pl.in \ GeneratePatches.pm.in \
nix-copy-closure.in \ nix-copy-closure.in \
find-runtime-roots.pl.in \ find-runtime-roots.pl.in \
build-remote.pl.in \ build-remote.pl.in \

View file

@ -1,429 +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;
my $timeLimit = $ENV{"NIX_BSDIFF_TIME_LIMIT"};
$timeLimit = 180 if !defined $timeLimit;
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";
#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) {
my $srcSystem = @{$dstNarFiles{$p}}[0]->{system};
my $dstSystem = @{$srcNarFiles{$q}}[0]->{system};
if (defined $srcSystem && defined $dstSystem && $srcSystem ne $dstSystem) {
print " SKIPPING $q due to different systems ($srcSystem vs. $dstSystem)\n";
next;
}
# 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 vs. $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;
}
my $time1 = time();
my $res = system("ulimit -t $timeLimit; @libexecdir@/bsdiff $tmpDir/A $tmpDir/B $tmpDir/DIFF");
my $time2 = time();
if ($res) {
warn "binary diff computation aborted after ", $time2 - $time1, " seconds\n";
next;
}
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; ", $time2 - $time1, " seconds\n";
if ($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;

View file

@ -146,7 +146,7 @@ sub readManifest {
sub writeManifest { sub writeManifest {
my ($manifest, $narFiles, $patches) = @_; my ($manifest, $narFiles, $patches, $noCompress) = @_;
open MANIFEST, ">$manifest.tmp"; # !!! check exclusive open MANIFEST, ">$manifest.tmp"; # !!! check exclusive
@ -198,11 +198,13 @@ sub writeManifest {
# Create a bzipped manifest. # Create a bzipped manifest.
unless (defined $noCompress) {
system("@bzip2@ < $manifest > $manifest.bz2.tmp") == 0 system("@bzip2@ < $manifest > $manifest.bz2.tmp") == 0
or die "cannot compress manifest"; or die "cannot compress manifest";
rename("$manifest.bz2.tmp", "$manifest.bz2") rename("$manifest.bz2.tmp", "$manifest.bz2")
or die "cannot rename $manifest.bz2.tmp: $!"; or die "cannot rename $manifest.bz2.tmp: $!";
}
} }