fasta_sampler_addprocess

src/fasta_sampler.nf

+Channel
+  .fromPath( "data/tiny_dataset/fasta/*.fasta" )
+  .set { fasta_file }
+
+  process sample_fasta {
+    input:
+  file fasta from fasta_file
+
+    output:
+  file "sample.fasta" into fasta_sample
+
+    script:
+  """
+  head ${fasta} > sample.fasta
+  """
+  }