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Filter array of files to one file

One step in my workflow produces File[] and I need to filter to grab just one File for the next step. I am trying to use glob without much success. Any hints?

cwl
• 2,088 views • link
written by eduardo • eduardo

2 answers

Michael R. Crusoe point out a couple of solutions:

At workflow level:

in:
  single_file:
    source: other_step/array_of_files
    valueFrom: $(self[0])
• 0 views • link
written by eduardo • eduardo

So this was something already answered by @Michael in one of the other posts? Generally good to link to the original when you do this.

Also accept your answer (green check mark) to provide closure to this question.

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written by GenoMax GenoMax

valueFrom: $( self.filter(file => !!file.basename.match(/^.*.ids.txt$/)).pop() )

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written by eduardo • eduardo

Add an ExpressionTool step to filter:

cwlVersion: v1.0
class: ExpressionTool

requirements: { InlineJavascriptRequirement: {} }

inputs:
  files:
    type: File[]

expression: |
    ${ return {"ids": inputs.files.filter(file => !!file.basename.match(/^.*\.ids\.txt$/)).pop()}; }

outputs:
  ids:
    type: File
• 0 views • link
written by eduardo • eduardo

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