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EC2 subnet/route-table: Simplify tag updating.

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This commit is contained in:
Robert Estelle 2014-11-13 19:57:15 -05:00 committed by whiter
parent d8b4bd3c34
commit fa7848a6c8
1 changed files with 3 additions and 22 deletions
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25
cloud/amazon/ec2_vpc_subnet.py
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@ -164,36 +164,17 @@ def get_resource_tags(vpc_conn, resource_id):
vpc_conn.get_all_tags(filters={'resource-id': resource_id})}
def dict_diff(old, new):
x = {}
old_keys = set(old.keys())
new_keys = set(new.keys())
for k in old_keys.difference(new_keys):
x[k] = {'old': old[k]}
for k in new_keys.difference(old_keys):
x[k] = {'new': new[k]}
for k in new_keys.intersection(old_keys):
if new[k] != old[k]:
x[k] = {'new': new[k], 'old': old[k]}
return x
def ensure_tags(vpc_conn, resource_id, tags, add_only, dry_run):
try:
cur_tags = get_resource_tags(vpc_conn, resource_id)
diff = dict_diff(cur_tags, tags)
if not diff:
if cur_tags == tags:
return {'changed': False, 'tags': cur_tags}
to_delete = {k: diff[k]['old'] for k in diff if 'new' not in diff[k]}
to_delete = {k: cur_tags[k] for k in cur_tags if k not in tags}
if to_delete and not add_only:
vpc_conn.delete_tags(resource_id, to_delete, dry_run=dry_run)
to_add = {k: diff[k]['new'] for k in diff if 'old' not in diff[k]}
to_add = {k: tags[k] for k in tags if k not in cur_tags}
if to_add:
vpc_conn.create_tags(resource_id, to_add, dry_run=dry_run)