Apt sources configuration improvements

- keyid-only (no source statement)
- key only (no source statement)
- custom source.list template
- support long gpg key fingerprints with spaces
- fix issue with key's that were already in the local gpg keyring
- allowing a new format to specify apt_sources in a dictionary instead of a
  list to allow merging of configurations

LP: #1574113

1 files changed, 10 insertions, 0 deletions

diff --git a/cloudinit/util.py b/cloudinit/util.py
index 8d6cbb4b..d6b80dbe 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -336,6 +336,16 @@ def rand_str(strlen=32, select_from=None):
     return "".join([random.choice(select_from) for _x in range(0, strlen)])
 
 
+def rand_dict_key(dictionary, postfix=None):
+    if not postfix:
+        postfix = ""
+    while True:
+        newkey = rand_str(strlen=8) + "_" + postfix
+        if newkey not in dictionary:
+            break
+    return newkey
+
+
 def read_conf(fname):
     try:
         return load_yaml(load_file(fname), default={})