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Scalable Nextflow Modules: Building a Template with Copier, CI/CD, and nf-test

· 19 min read
Thanh-Giang Tan Nguyen
Founder at G Labs

Creating and maintaining a library of reusable Nextflow modules is a significant challenge for bioinformatics teams. Without a consistent structure, code quality standards, and automated testing, modules quickly become difficult to share, validate, and integrate into pipelines. The nf-modules-template solves this by providing a production-ready template that uses Copier to scaffold new module repositories, GitHub Actions for automated CI/CD workflows, pre-commit hooks for code quality, and nf-test with intelligent sharding for scalable module testing. This post explores how these technologies work together to enable reproducible, maintainable Nextflow module libraries.