cli: add devel make-mime subcommand (#518)

* cli: add devel make-mime subcommand

Cloud-init documents an in-source-tree tool, make-mime.py used to
help users create multi-part mime user-data.  This tool is not shipped
in the cloud-init install and unavailable at runtime.  This patch
takes tools/make-mime.py and makes the functionality available via
the devel subcommand.

The primary interface of --attach file:content-type is still present.
The cli now adds:

 -l, --list-types  Print out a list of supported content-types
 -f, --force       Ignore errors for unsupported content-types

The tool will now raise a RunTime error if the supplied content-type
is not supported (or more likely a typo:
  x-shell-script vs.  x-shellscript)

* make-mime: write to stderr and exit 1 instead of raising RuntimeError

* Update example to match docs

* Update docs for make-mime subcommand

* Remove tools/make-mime.py; replaced by cloud-init devel make-mime

Co-authored-by: Rick Harding <rharding@mitechie.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/cloudinit/cmd/devel/parser.py b/cloudinit/cmd/devel/parser.py
index 99a234ce..1a3c46a4 100644
--- a/cloudinit/cmd/devel/parser.py
+++ b/cloudinit/cmd/devel/parser.py
@@ -9,6 +9,7 @@ from cloudinit.config import schema
 
 from . import net_convert
 from . import render
+from . import make_mime
 
 
 def get_parser(parser=None):
@@ -25,7 +26,9 @@ def get_parser(parser=None):
         (net_convert.NAME, net_convert.__doc__,
          net_convert.get_parser, net_convert.handle_args),
         (render.NAME, render.__doc__,
-         render.get_parser, render.handle_args)
+         render.get_parser, render.handle_args),
+        (make_mime.NAME, make_mime.__doc__,
+         make_mime.get_parser, make_mime.handle_args),
     ]
     for (subcmd, helpmsg, get_parser, handler) in subcmds:
         parser = subparsers.add_parser(subcmd, help=helpmsg)