Is there a consensus/guidelines on

path index

vs

tuple val(meta2), index)

? The required path channel inputs guidelines links to a old example of bwa mem with

path index

, while the current version uses

tuple val(meta2), path(index)

.

I'd say we're gearing towards a

tuple val(meta2), index

, which I only half like. Hopefully the coming updates to Nextflow will be the proper answer to deal with that properly.