add nextflow d30e48d

nextflow/tests/collect-tuple.nf

@@ -0,0 +1,51 @@
+#!/usr/bin/env nextflow
+
+/*
+ * fake alignment step producing a BAM and BAI files
+ */
+process algn {
+  debug true
+
+  input:
+  each barcode
+  each seq_id
+
+  output:
+  tuple val(barcode), val(seq_id), path('bam'), path('bai')
+
+  script:
+  """
+  echo BAM $seq_id - $barcode > bam
+  echo BAI $seq_id - $barcode > bai
+  """
+}
+
+
+/*
+ * Finally merge the BAMs and BAIs with the same 'barcode'
+ */
+
+process merge {
+  debug true
+
+  input:
+  tuple val(barcode), val(seq_id), path(bam, stageAs:'bam?'), path(bai, stageAs:'bai?')
+
+  script:
+  """
+  echo barcode: $barcode
+  echo seq_ids: $seq_id
+  echo bam    : $bam
+  echo bai    : $bai
+  """
+}
+
+/*
+ * main flow
+ */
+
+workflow {
+    algn( ['alpha', 'gamma'], ['one', 'two', 'three'] ) \
+      | groupTuple \
+      | merge
+}