A community effort to collect a curated set of analysis pipelines built using Nextflow.

nf-core

How can I have the default value of a string parameter be just a single space? There seems to be some internal stripping going on causing the parameter value to appear empty which in turn causes it to fail `nf-core pipelines lint` (Default parameters are invalid: '' should be non-empty)

I'm not sure, the issue could either be in nf-schema, Nextflow or nf-core tooling. I'll need more information to give a better answer :grin:

I'm tempted to say the problem is with `lint` but I don't know for sure. 

I'm currently on a holiday but it should be simple to set up an mvp to check which stage this is occurring. 

A simple workflow that does `println "${<http://params.space|params.space>}"`

Then run it with:
• just set the default value in config as `" "`
• a default set in schema and using nf-schema 
If these both print a space as intended then the issue would appear to lie in the tooling 

I am fairly confident this is a tooling issue

```if isinstance(param["default"], str) and param["default"].strip() == "":
            param["default"] = ""
            return param```
This is the code that `tools` uses when it sanitises the defaults

Thanks for the investigation Arthur! This looks like a <#CE5LG7WMB|> issue indeed