We invite anybody to contribute to the Snakemake Wrapper Repository. If you want to contribute we suggest the following procedure:
Fork the repository: https://github.com/snakemake/snakemake-wrappers
Clone your fork locally.
Locally, create a new branch:
git checkout -b my-new-snakemake-wrapper
Commit your contributions to that branch and push them to your fork:
git push -u origin my-new-snakemake-wrapper
Create a pull request.
The pull request will be reviewed and included as fast as possible.
If your pull request does not get a review quickly, you can @mention <https://github.blog/2011-03-23-mention-somebody-they-re-notified/> previous contributors to a particular wrapper (
git blame) or regular contributors that you think might be able to give a review.
Contributions should follow the coding style of the already present examples, i.e.:
meta.yamlthat describes the wrapper (see the meta.yaml documentation below)
environment.yamlwhich lists all required software packages and follows the respective best practices. The packages should be available for installation via the default anaconda channels or via the conda channels bioconda or conda-forge. Other sustainable community maintained channels are possible as well.
wrapper.Rfile that can deal with arbitrary
provide a minimal test case in a subfolder called
test, with an example
Snakefilethat shows how to use the wrapper (rule names should be descriptive and written in snake_case), some minimal testing data (also check existing wrappers for suitable data) and add an invocation of the test in
The following fields are available to use in the wrapper
meta.yaml file. All, except
those marked optional, should be provided.
name: The name of the wrapper.
description: a description of what the wrapper does.
url: URL to the wrapper tool webpage.
authors: A sequence of names of the people who have contributed to the wrapper.
params (optional): A mapping of parameters that can be used in the wrapper’s
paramsdirective. If no parameters are used for the wrapper, this field can be omitted.
notes (optional): Anything of note that does not fit into the scope of the other fields.
You can add a newline to the rendered text in these fields with the addition of
name: seqtk mergepe description: Interleave two paired-end FASTA/Q files url: https://github.com/lh3/seqtk authors: - Michael Hall input: - paired fastq files - can be compressed. output: - > a single, interleaved FASTA/Q file. By default, the output will be compressed, use the param ``compress_lvl`` to change this. params: compress_lvl: > Regulate the speed of compression using the specified digit, where 1 indicates the fastest compression method (less compression) and 9 indicates the slowest compression method (best compression). 0 is no compression. 11 gives a few percent better compression at a severe cost in execution time, using the zopfli algorithm. The default is 6. notes: Multiple threads can be used during compression of the output file with ``pigz``.
Please lint your test
snakemake -s <path/to/wrapper/test/Snakefile> --lint
If you want to debug your contribution locally (before creating a pull request), you
can install all dependencies with
conda). Install miniconda with the
channels as described for bioconda and
set up an environment with the necessary dependencies and activate it:
mamba create -n test-snakemake-wrappers snakemake pytest conda snakefmt black conda activate test-snakemake-wrappers
Afterwards, from the main directory of the repo, you can run the test(s) for your
contribution by specifying an expression
that matches the name(s) of your test(s) via the
-k option of
pytest test.py -v -k your_test
If you also want to test the docs generation locally, create another environment and activate it:
mamba create -n test-snakemake-wrapper-docs sphinx sphinx_rtd_theme pyyaml sphinx-copybutton conda activate test-snakemake-wrapper-docs
Then, enter the respective directory and build the docs:
cd docs make html
If it runs through, you can open the main page at
in a web browser. If you want to start fresh, you can clean up the build