DNAnexus

DNAnexus supports WDL workflows through their dx-toolkit and dxCompiler tools. This guide demonstrates running the 02_download_collection_files.wdl workflow, which typically takes 5-10 minutes to complete.

Prerequisites

Before beginning, ensure you have the following:

• A DNAnexus platform account (including free tier)

• Java 8 or higher

• Python 3.5 or higher

• Optional: cURL, git

Getting Started

The following software and workflows are required and will be installed and used as part of this tutorial:

• 02_download_collection_files.wdl

• dx-toolkit

• dxCompiler

Getting the Example Workflow

Clone with Git:

git clone https://github.com/DNAstack/dnastack-client-library-worked-examples.git

Or Download and Unzip

It is assumed that all commands will be run from the root directory of this repository on your local machine. From the directory where you’ve downloaded the examples repository:

git clone https://github.com/DNAstack/dnastack-client-library-worked-examples.git

Installing Required Tools

Download dxCompiler:

Download the latest version of dxCompiler by one of the following methods. This allows direct conversion and uploading of WDL workflows to DNAnexus.

Using cURL

curl -o dxCompiler.jar -L https://github.com/dnanexus/dxCompiler/releases/download/2.4.6/dxCompiler-2.4.6.jar

Or download from the releases page to the current directory and rename the file to dxCompiler.jar.

Install and initialize dx-toolkit

Download and initialize dx-toolkit. You will be prompted to log into your DNAnexus account.

pip3 install dxpy
dxlogin

Running a Workflow

• Create a project on DNAnexus where the workflow and associated files will be stored.

• Once your project has been setup, import the WDL workflow 02_download_collection_files.wdl to the DNAnexus platform using dxCompiler.

java -jar ./dxCompiler.jar compile ./examples/wdl/02_download_collection_files.wdl n -project dnastack-client-library-worked-examples n -folder /download_collection_files

To run the newly created workflow on the DNAnexus platform, select the project folder and Workflow item, and click "Run" as Analysis.

• To view the progress of the workflow at any time, select the "Monitor" tab.

• Inputs or parameters of the workflow can be modified. For example, to download from a different collection.

• The output files can be found in and downloaded from the folder specified in the Run dialog. In this case, the root of the DNAnexus project.