add workflow to copy a file and generate an md5sum

.dockstore.yml

@@ -50,3 +50,6 @@ workflows:
      primaryDescriptorPath: /validate_data_model.wdl
      testParameterFiles:
          - /validate_data_model.json
+   - name: copy_create_md5
+     subclass: WDL
+     primaryDescriptorPath: /copy_create_md5.wdl

copy_create_md5.wdl

@@ -0,0 +1,33 @@
+version 1.0
+
+workflow copy_create_md5 {
+    input {
+        String old_bucket_path
+        String new_bucket_path
+        String? project_id
+    }
+
+    call daisy_chain_copy {
+        input:
+            old_bucket_path = old_bucket_path,
+            new_bucket_path = new_bucket_path,
+            project_id = project_id
+    }
+}
+
+
+task daisy_chain_copy {
+    input {
+        String old_bucket_path
+        String new_bucket_path
+        String? project_id
+    }
+
+    command <<<
+        gsutil ~{"-u " + project_id} cp -D ~{old_bucket_path} ~{new_bucket_path}
+    >>>
+
+    runtime {
+        docker: "google/cloud-sdk:slim"
+    }
+}