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ma/nextflow/docs/developer/nextflow.config.md
2026-04-29 23:01:54 +02:00

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# `nextflow.config`
The `nextflow.config` package contains the implementation of the Nextflow configuration.
## Class Diagram
```{mermaid} diagrams/nextflow.config.mmd
```
```{note}
Some classes may be excluded from the above diagram for brevity.
```
## Notes
Any command that parses Nextflow config files (`config`, `run`, etc) uses the `ConfigBuilder` to build a `ConfigMap` from a set of config files. The `ConfigBuilder` itself uses a `ConfigParser` to parse the config files.
The Nextflow configuration language is essentially Groovy with some extensions. These extensions are implemented in `ConfigBase` and `ConfigTransformImpl`.