Do not publish when provided path is empty/null

[VasLem]

I would like to avoid the redundancy of input arguments to a process, but I cannot seem to find a way to do so for that, rather simple use case, where I don't want a process to publish something, due to the fact that the enabled flag is not considered before checking the publishDir value.

The current way to tackle it is to plug in a conditional inside the publishDir path, like this:

process index {
input:
   val inp_dir

publishDir {bam_dir.length() > 0 ? inp_dir: "A_PATH_THAT_WILL_NEVER_BE_USED"}, mode: 'copy', enabled: "${inp_dir.length() > 0}"

script:
'''
echo test > test.txt
'''

output:
path('*.*', includeInputs: false)
}

If I don't use the conditional, I am getting an error of "Path string cannot be empty" . I like this idea, as it makes it straightforward to publish or not, based on the input parameters even, and the processes would be cleaner that way.