Referencing git hash in nextflow

[nkrumm]

Take a look at https://www.nextflow.io/docs/latest/metadata.html

println "Git info: $workflow.repository - $workflow.revision [$workflow.commitId]"

I am not sure if those can be referenced in a config file, but at least they could be printed with workflow execution.

We can also consider having batcman slurp up these values automatically and store/display them, since they should be passed back automatically.

relevant code in dada2-nf:

dada2-nf/nextflow.config

Line 8 in 182991c

// TODO: version number should contain output of `git describe --tags --dirty`