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clap/examples/tutorial_derive/04_04_custom.md
Ed Page e1aafce431 test(tutorial): Ensure we actually test code 
Biggest problem identified is that we are incorrectly setting the help
usage in `04_04_custom`
2022-08-08 14:05:08 -05:00

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$ 04_04_custom_derive --help
clap [..]
A simple to use, efficient, and full-featured Command Line Argument Parser

USAGE:
    04_04_custom_derive[EXE] [OPTIONS] [INPUT_FILE]

ARGS:
    <INPUT_FILE>    some regular input

OPTIONS:
        --set-ver <VER>        set version manually
        --major                auto inc major
        --minor                auto inc minor
        --patch                auto inc patch
        --spec-in <SPEC_IN>    some special input argument
    -c <CONFIG>                
    -h, --help                 Print help information
    -V, --version              Print version information

$ 04_04_custom_derive
? failed
error: Can only modify one version field

USAGE:
    clap [OPTIONS] [INPUT_FILE]

For more information try --help

$ 04_04_custom_derive --major
Version: 2.2.3

$ 04_04_custom_derive --major --minor
? failed
error: Can only modify one version field

USAGE:
    clap [OPTIONS] [INPUT_FILE]

For more information try --help

$ 04_04_custom_derive --major -c config.toml
? failed
Version: 2.2.3
error: INPUT_FILE or --spec-in is required when using --config

USAGE:
    clap [OPTIONS] [INPUT_FILE]

For more information try --help

$ 04_04_custom_derive --major -c config.toml --spec-in input.txt
Version: 2.2.3
Doing work using input input.txt and config config.toml