nf-core_modules/README.md
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Co-authored-by: Phil Ewels <phil.ewels@scilifelab.se>

Co-authored-by: Phil Ewels <phil.ewels@scilifelab.se>
2022-03-18 14:27:50 +01:00

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# ![nf-core/modules](docs/images/nfcore-modules_logo.png)
[![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A521.10.3-23aa62.svg?labelColor=000000)](https://www.nextflow.io/)
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> THIS REPOSITORY IS UNDER ACTIVE DEVELOPMENT. SYNTAX, ORGANISATION AND LAYOUT MAY CHANGE WITHOUT NOTICE!
A repository for hosting [Nextflow DSL2](https://www.nextflow.io/docs/latest/dsl2.html) module files containing tool-specific process definitions and their associated documentation.
## Table of contents
- [Using existing modules](#using-existing-modules)
- [Adding new modules](#adding-new-modules)
- [Help](#help)
- [Citation](#citation)
## Using existing modules
The module files hosted in this repository define a set of processes for software tools such as `fastqc`, `bwa`, `samtools` etc. This allows you to share and add common functionality across multiple pipelines in a modular fashion.
We have written a helper command in the `nf-core/tools` package that uses the GitHub API to obtain the relevant information for the module files present in the [`modules/`](modules/) directory of this repository. This includes using `git` commit hashes to track changes for reproducibility purposes, and to download and install all of the relevant module files.
1. Install the latest version of [`nf-core/tools`](https://github.com/nf-core/tools#installation) (`>=2.0`)
2. List the available modules:
```console
$ nf-core modules list remote
,--./,-.
___ __ __ __ ___ /,-._.--~\
|\ | |__ __ / ` / \ |__) |__ } {
| \| | \__, \__/ | \ |___ \`-._,-`-,
`._,._,'
nf-core/tools version 2.0
INFO Modules available from nf-core/modules (master): pipeline_modules.py:164
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Module Name ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ bandage/image │
│ bcftools/consensus │
│ bcftools/filter │
│ bcftools/isec │
..truncated..
```
3. Install the module in your pipeline directory:
```console
$ nf-core modules install fastqc
,--./,-.
___ __ __ __ ___ /,-._.--~\
|\ | |__ __ / ` / \ |__) |__ } {
| \| | \__, \__/ | \ |___ \`-._,-`-,
`._,._,'
nf-core/tools version 2.0
INFO Installing fastqc pipeline_modules.py:213
INFO Downloaded 3 files to ./modules/nf-core/modules/fastqc pipeline_modules.py:236
```
4. Import the module in your Nextflow script:
```nextflow
#!/usr/bin/env nextflow
nextflow.enable.dsl = 2
include { FASTQC } from './modules/nf-core/modules/fastqc/main'
```
5. Remove the module from the pipeline repository if required:
```console
$ nf-core modules remove fastqc
,--./,-.
___ __ __ __ ___ /,-._.--~\
|\ | |__ __ / ` / \ |__) |__ } {
| \| | \__, \__/ | \ |___ \`-._,-`-,
`._,._,'
nf-core/tools version 2.0
INFO Removing fastqc pipeline_modules.py:271
INFO Successfully removed fastqc pipeline_modules.py:285
```
6. Check that a locally installed nf-core module is up-to-date compared to the one hosted in this repo:
```console
$ nf-core modules lint fastqc
,--./,-.
___ __ __ __ ___ /,-._.--~\
|\ | |__ __ / ` / \ |__) |__ } {
| \| | \__, \__/ | \ |___ \`-._,-`-,
`._,._,'
nf-core/tools version 2.0
INFO Linting pipeline: . lint.py:104
INFO Linting module: fastqc lint.py:106
╭─────────────────────────────────────────────────────────────────────────────────╮
│ [!] 1 Test Warning │
╰─────────────────────────────────────────────────────────────────────────────────╯
╭──────────────┬───────────────────────────────┬──────────────────────────────────╮
│ Module name │ Test message │ File path │
├──────────────┼───────────────────────────────┼──────────────────────────────────┤
│ fastqc │ Local copy of module outdated │ modules/nf-core/modules/fastqc/ │
╰──────────────┴────────────────────────────── ┴──────────────────────────────────╯
╭──────────────────────╮
│ LINT RESULTS SUMMARY │
├──────────────────────┤
│ [✔] 15 Tests Passed │
│ [!] 1 Test Warning │
│ [✗] 0 Test Failed │
╰──────────────────────╯
```
## Adding new modules
If you wish to contribute a new module, please see the documentation on the [nf-core website](https://nf-co.re/developers/adding_modules).
> Please be kind to our code reviewers and submit one pull request per module :)
## Help
For further information or help, don't hesitate to get in touch on [Slack `#modules` channel](https://nfcore.slack.com/channels/modules) (you can join with [this invite](https://nf-co.re/join/slack)).
## Citation
If you use the module files in this repository for your analysis please you can cite the `nf-core` publication as follows:
> **The nf-core framework for community-curated bioinformatics pipelines.**
>
> Philip Ewels, Alexander Peltzer, Sven Fillinger, Harshil Patel, Johannes Alneberg, Andreas Wilm, Maxime Ulysse Garcia, Paolo Di Tommaso & Sven Nahnsen.
>
> _Nat Biotechnol._ 2020 Feb 13. doi: [10.1038/s41587-020-0439-x](https://dx.doi.org/10.1038/s41587-020-0439-x).
<!---
### Offline usage
If you want to use an existing module file available in `nf-core/modules`, and you're running on a system that has no internet connection, you'll need to download the repository (e.g. `git clone https://github.com/nf-core/modules.git`) and place it in a location that is visible to the file system on which you are running the pipeline. Then run the pipeline by creating a custom config file called e.g. `custom_module.conf` containing the following information:
```bash
include /path/to/downloaded/modules/directory/
```
Then you can run the pipeline by directly passing the additional config file with the `-c` parameter:
```bash
nextflow run /path/to/pipeline/ -c /path/to/custom_module.conf
```
> Note that the nf-core/tools helper package has a `download` command to download all required pipeline
> files + singularity containers + institutional configs + modules in one go for you, to make this process easier.
# New test data created for the module- sequenzautils/bam2seqz
The new test data is an output from another module- sequenzautils/bcwiggle- (which uses sarscov2 genome fasta file as an input).
-->