Exceptions on malformed yaml

[jayvdb]

I forgot to add a template after a target

targets:
  - .gitignore:

And got

  File "/home/jayvdb/.local/lib/python3.6/site-packages/jinja2/loaders.py", line 27, in split_template_path
    for piece in template.split('/'):
AttributeError: 'NoneType' object has no attribute 'split'

I suspect there are a few other similar cases of exceptions when given malformed yaml. moban should explain which line is broken and why.

[chfw]

Yes it will be user friendly

[seeeturtle]

@jayvdb @chfw
To report the exact position where it's wrong, yaml parser that supports line number is required.
However, pyyaml doesn't supports the feature. I can do some hacky things to make it support,
but there is already better library ruamel.yaml that supports it.
Is it ok to use ruamel.yaml instead of pyyaml?
Or should I do the hacky job?

[chfw]

looking from ruamel.yaml's change log and overview, it looks better. My instance is: if our unit tests above passes, I would give ruame.yaml a go.

[seeeturtle]

yup, it passes the test.
I'll work with the ruamek.yaml