parsing capability of the resource/params tag.

[c-mertes]

The resource and params tag of the snakemake field can be a dict. And also they can be quoted by the '`sm' tag.

To enable all fields to be parsed with python code we need to loop over all fields and convert the dictionaries into strings to write them out later into the rule.

Hope this helps to go into the right direction.

I guess the exception to catch if the 'output' of the knitr part is wrong indented has to go somewhere else, but I do not know where.

[c-mertes]

This would be an example header. The same goes for resources

#'---
#' title: Example
#' author: Christian Mertes
#' wb:
#'  params: 
#'    a: '`sm config["MY_VALUE"]`'
#'    b: "ABC"
#'    c: "HELLO"
#'  input: 
#'  output:
#'---

[stefanches7]

You're right about the possibility of dicts under tags generally. However, the ensureString() is only calles on "input" and "output" tags:

Therefore, it's same to assume that we catch exactly the bug with high probability.

[kTakumo]

Now implemented.