looper is a command-line job submitting engine. It’s the glue that connects your PEP project to command-line pipelines. It can work with any pipeline that takes command-line arguments. It also provides a flexible template system so that it can work with either local compute power or a cluster (using any resource manager, e.g. SLURM, LFS, SGE, etc.). looper makes it easy to run any kind of command-line tool serially across all the samples in your project. looper is not a pipeline workflow engine, which is used to build pipelines; it assumes you already have pipelines built, and it helps you map samples to those pipelines.

We provide a suite of already-built pipelines for ease-of-use, but you can configure it to work with just about anything. You have complete control.

Code and documentation

Quick start

Install with

pip install https://github.com/pepkit/looper/zipball/master

Once your PEP project and your pipelines are configured, you run your samples through looper with this command:

looper run project_config.yaml

That command will parse your PEP samples, and build jobs for each one. It’s scalable: by default, it runs your jobs sequentially on the local computer, but with a small configuration change, it will create and submit jobs to any cluster resource manager (like SLURM, SGE, or LFS).

To check on your running jobs, you run:

looper check project_config.yaml

To summarize the statistics of all the pipeline runs, you type:

looper summarize project_config.yaml

Looper pipelines

Here is a list of publicly available looper-compatible pipelines

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