Use a derive macro with annotations on your Command Line Interface settings struct to manage the settings of your application:
- create an instance with default values (provided by annotations)
- read each possible configuration file, if it exists:
- update the fields that are defined in the configuration file
- parse the command line arguments, and update the relevant fields with the provided argument
By using annotations, each field can be configurable via the configuration file(s) and/or the command line.
cli-settings-derive can be seen as a top layer above
See doc.rs documentation for detailed documentation and an example.
See the crate repository for a complete working example, with:
- clap settings to tune the generated help message (-h)
- field with custom type and user provided function to parse the value from string