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building_your_pipeline.md 18.30 KiB

Building your own pipeline

The goal of this guide is to walk you through the Nextflow pipeline building process you will learn:

  1. How to use this git repository (LBMC/nextflow) as a template for your project.
  2. The basis of Nextflow the pipeline manager that we use at the lab.
  3. How to build a simple pipeline for the transcript-level quantification of RNASeq data
  4. How to run the exact same pipeline on a computing center (PSMN)

This guide assumes that you followed the Git basis, training course.

Initialize your own project

You are going to build a pipeline for you or your team. So the first step is to create your own project.

Forking

Instead of reinventing the wheel, you can use the LBMC/nextflow as a template. To easily do so, go to the LBMC/nextflow repository and click on the fork button (you need to log-in).

fork button

In git, the action of forking means that you are going to make your own private copy of a repository. This repository will keep a link with the original LBMC/nextflow project from which you will be able to

Project organization

This project (and yours) follows the guide of good practices for the LBMC

You are now on the main page of your fork of the LBMC/nextflow. You can explore this project, all the codes in it is under the CeCILL licence (in the LICENCE file).

The README.md file contains instructions to run your pipeline and test its installation.

The CONTRIBUTING.md file contains guidelines if you want to contribute to the LBMC/nextflow.

The data folder will be the place where you store the raw data for your analysis. The results folder will be the place where you store the results of your analysis.

The content of data and results folders should never be saved on git.

The doc folder contains the documentation and this guide.

And most interestingly for you, the src contains code to wrap tools. This folder contains one visible subdirectories nf_modules some pipeline examples and other hidden folders and files.