From 94ccd9e7bec3d9554d7885e6a24ce3202b3134a7 Mon Sep 17 00:00:00 2001
From: Pascal Terjan <pterjan@gmail.com>
Date: Sun, 9 Nov 2014 23:31:40 +0000
Subject: Add support for sharding the build

---
 NEWS |  1 +
 iurt | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/NEWS b/NEWS
index b4fef05..d50d0e7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,5 @@
 - speed up installing packages
+- support sharding the build with --num_shards and --shard_id
 
 0.6.23
 - remove old src.rpm before recreating it (mga#14243)
diff --git a/iurt b/iurt
index eb60726..b69b4f2 100755
--- a/iurt
+++ b/iurt
@@ -176,6 +176,12 @@ $run{todo} = [];
     [ "", "build-all", 0, "",
     "Build all packages of the media, even if they are up to date",
     sub { $run{build_all} = 1 }, "Setting the full build flag" ],
+    [ "", "num_shards", 1, "<n>",
+    "Number of shards for building",
+    sub { ($run{num_shards}) = @_; 1 }, 'Setting number of shards' ],
+    [ "", "shard_id", 1, "<n>",
+    "Shard id (starts at 0)",
+    sub { ($run{shard_id}) = @_; 1 }, 'Setting shard id' ],
     [ "n", "no", 0, "", 
     "Perform all the check but do not compile anything", 
     sub { ($run{no_compile}) = 1 }, "Setting the no compilation flag" ],
@@ -972,6 +978,10 @@ do {
     my %children;
     for ($i; $i < @{$run{todo}}; $i++) {
 	my ($dir, $srpm, $status) = @{$run{todo}[$i]};
+	if ($run{num_shards} && ($i % $run{num_shards}) != $run{shard_id}) {
+	    plog('DEBUG', "Skipping $srpm, not for my shard");
+	    next;
+	}
 	$done{$srpm} and next;
 	$done{$srpm} = 1;
 	check_version(\%run, $srpm, \%srpm_version) or next;
-- 
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