rm double define variable

Author: ggabernet

subworkflows/local/fastq_input_check.nf

@@ -27,7 +27,7 @@ workflow FASTQ_INPUT_CHECK {
         }
         .set { ch_reads }
 
-    ch_versions = SAMPLESHEET_CHECK.out.versions
+    def ch_versions_base = SAMPLESHEET_CHECK.out.versions
 
     // Merge multi-lane sample fastq for protocols except for 10x genomics, trust4 (cellranger handles multi-fastq per sample)
     if (params.library_generation_method == 'sc_10x_genomics' || params.library_generation_method == 'trust4')  {
@@ -44,10 +44,12 @@ workflow FASTQ_INPUT_CHECK {
         .dump (tag: 'fastq_channel_after_merge_samples')
         .set { ch_merged_reads }
 
-        ch_versions = ch_versions.mix( CAT_FASTQ.out.versions )
-
     }
 
+    // final versions channel: base merged with CAT_FASTQ versions only when CAT_FASTQ was used
+    def ch_versions = (params.library_generation_method == 'sc_10x_genomics' || params.library_generation_method == 'trust4') ? 
+        ch_versions_base : ch_versions_base.mix( CAT_FASTQ.out.versions )
+
     emit:
     reads = ch_merged_reads // channel: [ val(meta), [ reads ] ]
     versions = ch_versions // channel: [ versions.yml ]