for loop

inputs

   "{{ project_name }}.docker": "registry-vpc.cn-shanghai.aliyuncs.com/pgx-docker-registry/samtools:v1.3.1",
   "{{ project_name }}.cluster_config": "OnDemand bcs.a2.large img-ubuntu-vpc",
   "{{ project_name }}.bam": "{{ bam }}",
-  "{{ project_name }}.inputRegionsFile": "{{ inputRegionsFile }}",
+  "{{ project_name }}.region": "{{ region }}",
   "{{ project_name }}.sample": "{{ sample }}"
 }

tasks/getBam.wdl

 	File bam
 	File bam_idx
 	String sample
-	String region
+	File region
 	String docker
 	String cluster_config
 	String disk_size

workflow.wdl

 
 
 workflow {{ project_name }} {
-	File inputRegionsFile
+	File region
 	File bam
 	File bam_idx
 	String sample
 		bam=bam,
 		bam_idx=bam_idx,
 		sample=sample,
-		region=inputRegionsFile,
+		region=region,
 		docker=docker,
 		cluster_config=cluster_config,
 		disk_size=disk_size