useful little utility for converting between cache backends without having to do a regen.

1 files changed, 44 insertions, 0 deletions

diff --git a/rewrite-misc/utilities/clone_cache.py b/rewrite-misc/utilities/clone_cache.py
new file mode 100755
index 0000000..da09e46
--- /dev/null
+++ b/rewrite-misc/utilities/clone_cache.py
@@ -0,0 +1,44 @@
+#!/usr/bin/python
+import portage.config, sys, time
+
+if __name__ == "__main__":
+	verbose = 0
+	if len(sys.argv) not in (3,4):
+		print "I need 2 args, cache label to read from, cache label to write to, with -v optional for verbose"
+	elif len(sys.argv) == 4:
+		verbose = 1
+	c=portage.config.load_config()
+	try:	cache1 = c.cache[sys.argv[1]]
+	except KeyError:
+		print "read cache label '%s' isn't defined." % sys.argv[1]
+		sys.exit(1)
+	try:	cache2 = c.cache[sys.argv[2]]
+	except KeyError:
+		print "write cache label '%s' isn't defined." % sys.argv[2]
+		sys.exit(1)
+
+	if cache2.readonly:
+		print "can't update cache label '%s', it's marked readonly." % sys.argv[2]
+		sys.exit(2)
+	if not cache2.autocommits:
+		cache2.sync_rate = 1000
+	if verbose:	print "grabbing cache2's existing keys"
+	valid = {}
+	start = time.time()
+	if verbose:
+		for k,v in cache1.iteritems():
+			print "updating %s" % k
+			cache2[k] = v
+			valid[k] = True
+	else:
+		for k,v in cache1.iteritems():
+			cache2[k] = v
+			valid[k] = True
+
+	for x in cache2.iterkeys():
+		if not x in valid:
+			if verbose:	print "deleting %s" % x
+			del cache2[x]
+	
+	if verbose:
+		print "took %i seconds" % int(time.time() - start)