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lix/scripts/nix-generate-patches.in
2014-08-13 23:12:57 +02:00

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#! @perl@ -w @perlFlags@
use strict;
use Nix::Manifest;
use Nix::GeneratePatches;
use Nix::Utils;
if (scalar @ARGV != 5) {
print STDERR <<EOF;
Usage: nix-generate-patches NAR-DIR PATCH-DIR PATCH-URI OLD-MANIFEST NEW-MANIFEST
This command generates binary patches between NAR files listed in
OLD-MANIFEST and NEW-MANIFEST. The patches are written to the
directory PATCH-DIR, and the prefix PATCH-URI is used to generate URIs
for the patches. The patches are added to NEW-MANIFEST. All NARs are
required to exist in NAR-DIR. Patches are generated between
succeeding versions of packages with the same name.
EOF
exit 1;
}
my $narPath = $ARGV[0];
my $patchesPath = $ARGV[1];
my $patchesURL = $ARGV[2];
my $srcManifest = $ARGV[3];
my $dstManifest = $ARGV[4];
my (%srcNarFiles, %srcLocalPaths, %srcPatches);
readManifest $srcManifest, \%srcNarFiles, \%srcPatches;
my (%dstNarFiles, %dstLocalPaths, %dstPatches);
readManifest $dstManifest, \%dstNarFiles, \%dstPatches;
my $tmpDir = mkTempDir("nix-generate-patches");
generatePatches \%srcNarFiles, \%dstNarFiles, \%srcPatches, \%dstPatches,
$narPath, $patchesPath, $patchesURL, $tmpDir;
propagatePatches \%srcPatches, \%dstNarFiles, \%dstPatches;
# Optionally add all new patches to the manifest in $NIX_ALL_PATCHES.
my $allPatchesFile = $ENV{"NIX_ALL_PATCHES"};
if (defined $allPatchesFile) {
my (%dummy, %allPatches);
readManifest("$patchesPath/all-patches", \%dummy, \%allPatches)
if -f $allPatchesFile;
copyPatches \%dstPatches, \%allPatches;
writeManifest($allPatchesFile, {}, \%allPatches, 0);
}
writeManifest $dstManifest, \%dstNarFiles, \%dstPatches;