added process for writing results to file

nextflow/backmap.nf

@@ -630,6 +630,16 @@ if (coverageHistogram) {
             return result
         }.set { chResults }
 
-        chResults.view()
+        process results2File {
+            cpus 1
+            input:
+                val results from chResults.collect()
+            output:
+                file "${prefix}.results.txt" into chResultFile
+            script:
+                """
+                echo '${results.join('\n')}' > ${prefix}.results.txt
+                """
+        }
     } //fi: genomeSizeEstimation
 } //fi: coverageHistogram