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On this page
  • Workflow Directory Structure
  • Workflow Metadata
  • Readme File
  • Building a Workflow
  • Getting a Workflow

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  1. Developer
  2. Workflows

Workflow Build Process

Last updated 2 years ago

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You can create workflows using the or using the CLI using tools provided by the . This page focuses on creating a workflow in a terminal. It will walk you through important features of the DNAnexus workflow build infrastructure that will help you build your workflows programmatically.

The , dx-toolkit, is required to build workflows from JSON definitions.

For information on building Nextflow workflows, see .

Workflow Directory Structure

DNAnexus workflows can be built using the command, which takes the workflow JSON representation from your local workstation and uploads it to a on the Platform. The DNAnexus SDK expects the workflow definition to reside in a directory with the following structure:

MyWorkflow
├── dxworkflow.json
└── Readme.md

Workflow Metadata

The file dxworkflow.json is a DNAnexus workflow metadata file. If it is detected in the directory provided to dx build, the dx-toolkit will attempt to build a workflow on the Platform by passing the workflow specification in dxworkflow.json to .

Readme File

The Readme.md file, if present, is inlined into the description field of the workflow.

Building a Workflow

Having placed the workflow metadata in MyWorkflow, you can load your workflow on the DNAnexus Platform:

$ dx build MyWorkflow
$ dx build MyWorkflow --keep-open

Getting a Workflow

$ dx get MyWorkflow

This will create a directory MyWorkflow (after the workflow's name) containing the workflow representation in the working directory. It can be used again to create a new workflow with dx build.

The built workflow will be in a , immutable state. Adding --keep-open option will keep the workflow open allowing you to edit the workflow from the DNAnexus UI.

Similarly to apps and applets, developers can use the command to download the workflow description from the Platform, for example:

closed
web interface
DNAnexus SDK
DNAnexus SDK
here
workflow object
/workflow-xxxx/new
dx build
dx get