channel-duplication.md

Problem

You need to you use the same channel as input in two or more processes.

Solution

In DSL2, you can just do it! The into operator is no longer needed.

Code

process foo {
  input: path x
  script: 
  """
  echo your_command --input $x
  """
}    

process bar {
  input: path x
  script: 
  """
  echo your_command --input $x
  """
}    

workflow {
  input_ch = Channel.fromPath("$baseDir/data/prots/*_?.fa")

  foo(input_ch)
  bar(input_ch)
}

Run it

Use the the following command to execute the example:

nextflow run nextflow-io/patterns/channel-duplication.nf