add loop-rebuild script

1 files changed, 25 insertions, 0 deletions

diff --git a/loop-rebuild b/loop-rebuild
new file mode 100755
index 0000000000..c2b94a1dcc
--- /dev/null
+++ b/loop-rebuild
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+ssleep () {
+	seconds=$1
+	now=$(date "+%s")
+	sleep $(( ((now + seconds + seconds / 4) / seconds) * seconds - now))
+}
+
+stamp () {
+	Meta/V 2>/dev/null | sha1sum
+}
+
+P=previous
+O=observed
+while :
+do
+	while O=$(stamp) && test "$P" = "$O"
+	do
+		ssleep 300
+	done
+	ssleep 30
+	time nice -20 Meta/Dothem -j16 --scratch --dash; uptime; date
+	P=$(stamp)
+	Meta/V
+done