From 9022cf9adfd3504e40d52fa2891663bf33fa2f9d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 28 Dec 2004 21:12:00 +0000
Subject: [PATCH] * A small utility to add the Size and NarHash fields to old
 manifests.

---
 scripts/update-manifest.pl | 53 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100755 scripts/update-manifest.pl

diff --git a/scripts/update-manifest.pl b/scripts/update-manifest.pl
new file mode 100755
index 0000000000..bd76f37ad6
--- /dev/null
+++ b/scripts/update-manifest.pl
@@ -0,0 +1,53 @@
+#! /usr/bin/perl -w -I.
+
+use strict;
+use readmanifest;
+
+die unless scalar @ARGV == 2;
+
+my $cache = $ARGV[0];
+my $manifest = $ARGV[1];
+my %narFiles;
+my %patches;
+my %successors;
+
+readManifest $manifest, \%narFiles, \%patches, \%successors;
+
+foreach my $storePath (keys %narFiles) {
+    my $narFileList = $narFiles{$storePath};
+
+    foreach my $narFile (@{$narFileList}) {
+        if (!defined $narFile->{size} or
+            !defined $narFile->{narHash})
+        {
+            $narFile->{url} =~ /\/([^\/]+)$/;
+            die unless defined $1;
+            my $fn = "$cache/$1";
+            
+            my @info = stat $fn or die;
+            $narFile->{size} = $info[7];
+
+            my $narHash;
+            my $hashFile = "$fn.NARHASH";
+            if (-e $hashFile) {
+                open HASH, "<$hashFile" or die;
+                $narHash = <HASH>;
+                close HASH;
+            } else {
+                print "$fn\n";
+                $narHash = `bunzip2 < '$fn' | nix-hash --flat /dev/stdin` or die;
+                open HASH, ">$hashFile" or die;
+                print HASH $narHash;
+                close HASH;
+            }
+            chomp $narHash;
+            $narFile->{narHash} = $narHash;
+        }
+    }
+}
+
+if (! -e "$manifest.backup") {
+    system "mv --reply=no '$manifest' '$manifest.backup'";
+}
+
+writeManifest $manifest, \%narFiles, \%patches, \%successors;