Add CLI args and env var support #98
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Adds support for configuring the node via CLI arguments and environment variables, allowing runtime overrides of the configuration file. - Added `clap` dependency for argument parsing. - Implemented layered config loading: config file (full set of options) + environment variables + CLI arguments. Env vars and CLI args override values from the config file when present. - Implemented `ConfigBuilder` to handle partial state and merging. - Added comprehensive unit tests for precedence and validation logic. - Updated README with usage instructions and explanation of config precedence. Co-authored-by: moisesPomilio <93723302+moisesPompilio@users.noreply.github.com>
| cargo run --bin ldk-server | ||
| ``` | ||
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| - Using CLI arguments (all optional): |
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this is calling the cli, not running the server with command line args
| } | ||
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| #[derive(Debug)] | ||
| #[derive(Debug, PartialEq)] |
| #[cfg(any(feature = "events-rabbitmq", feature = "experimental-lsps2-support"))] | ||
| return Err(io::Error::new( | ||
| io::ErrorKind::InvalidInput, | ||
| format!( | ||
| "To use the `{}` feature, you must provide a configuration file.", | ||
| if cfg!(feature = "events-rabbitmq") { | ||
| "events-rabbitmq" | ||
| } else { | ||
| "experimental-lsps2-support" | ||
| } | ||
| ), | ||
| )); | ||
| } |
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Why is this the else case? If no config file is specified in the args, we should instead look for one in the default data dir
| Ok(config) => config, | ||
| Err(e) => { | ||
| eprintln!("Invalid configuration file: {}", e); | ||
| eprintln!("Invalid configuration: {}", e); |
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| eprintln!("Invalid configuration: {}", e); | |
| eprintln!("Invalid configuration: {e}"); |
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| let mut ldk_node_config = Config::default(); | ||
| let config_file = match load_config(&config_path) { | ||
| let config_file = match load_config(&args_config) { |
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Config path and the args above is never used now. We should be able to remove that logic as we use clap now, but we still should check for the default config file
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Continues the work started in #69 by @moisesPompilio adding support for configuring the node via CLI arguments and environment variables, allowing runtime overrides of the configuration file.
I introduced
ConfigBuilderto handle partial state and merging of the configuration fields, which significantly cleaned up theload_configlogic.