clappconfig - CLI app config boilerplate

```none Clap App

Config

clappconfig ```

This crate provides a simple CLI app boilerplate that takes care of the most repetitive init tasks:

• Load JSON5 config from a custom or default path (or use Default::default())
• Set up logging, with CLI and config-based overrides
• Optionally print the loaded or default config
• Show help / version on demand, courtesy of clap
• Optional start-up banner print

Supports custom clap arguments as well.

-> The repository is open to improvement PRs.

Logging

• uses env_logger by default
• level can be set in the config file
• log level can be overridden by the --log CLI flag
• log level can be increased by repeated use of -v or --verbose

Re-exports

The crates re-exports crates used in public API: clap, anyhow, log.

Example

See the examples directory.

The example called "rotn" implements rot13 as a command-line tool.

```none $ cargo run --example rotn -- -h

Rot-N 0.1.0 by Ondřej Hruška ondra@ondrovo.com

USAGE: rotn [FLAGS] [OPTIONS] --input

FLAGS: --default-config Print the default config JSON for reference (or to be piped to a file) --dump-config Print the loaded config struct -h, --help Prints help information -V, --version Prints version information -v, --verbose Increase logging verbosity (repeat to increase)

OPTIONS: -c, --config Sets a custom config file (JSON5) -i, --input Input file --log Set logging verbosity (error,warning,info,debug,trace) -n, --shift Positive or negative shift, default 13 ```

To get rot13 of this README, run cargo run --example rotn -- -iREADME.md.