Pretty up the debug module

Previously the usage of the yaml_dumps module was causing
any python unicode key and value to show up as:

'item': !!python/unicode "some string"

This was not very pretty...

Fix this by using safe_dumps (which is also a good thing to
use and allow_unicode=True). Also create a tiny helper function
in the cc_debug module that does not include the yaml start and
end footers (since this module has its own footers and headers).

Also includes a basic sanity test for this module.

1 files changed, 8 insertions, 8 deletions

diff --git a/cloudinit/util.py b/cloudinit/util.py
index b71057fb..ee5e5c0a 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -1274,14 +1274,14 @@ def read_write_cmdline_url(target_fn):
             logexc(LOG, "Failed writing url content to %s", target_fn)
 
 
-def yaml_dumps(obj):
-    formatted = yaml.dump(obj,
-                    line_break="\n",
-                    indent=4,
-                    explicit_start=True,
-                    explicit_end=True,
-                    default_flow_style=False)
-    return formatted
+def yaml_dumps(obj, explicit_start=True, explicit_end=True):
+    return yaml.safe_dump(obj,
+                          line_break="\n",
+                          indent=4,
+                          explicit_start=explicit_start,
+                          explicit_end=explicit_end,
+                          default_flow_style=False,
+                          allow_unicode=True)
 
 
 def ensure_dir(path, mode=None):