Can Nextflow pipeline check the process executor type during running?

March 22, 2023

I am running one Nextflow script in different environments (AWS batch, slurm…). I want to check if the process.executor is awsbatch during running. But I cannot call process directly. It raises the error No such variable: process. Are there any ways to check or print out the executor type for Nextflow pipeline job?

>Solution :

Inside a process instance (task), you can obtain this info through the $task.executor implicit variable. Check the example below:

process FOO {
  debug true

  script:
  """
  echo $task.executor
  """
}

workflow {
  FOO()
}

It outputs:

N E X T F L O W  ~  version 23.02.0-edge
Launching `asd.nf` [naughty_yonath] DSL2 - revision: 2995f22831
executor >  local (1)
[99/f57ab8] process > FOO [100%] 1 of 1 ✔
local