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61c9e6265b
For those that want the original behavior, you can usxe
`arg.help_heading(Some("FLAGS"))` on your flags. Limitations:
- This will not give you a special sort order
- This will not get a `[FLAGS]` added to usage
For templates, we removed `{unified}` and `{flags}`. To help people
catch these, a debug_assert was added.
I'm unsure but I think there might be a change in behavior in calcuating
when to show `[OPTION]` in usage. The old code only looked at
`required` while flags looked only at arg groups. We now look at both.
Ideally we'd add these in `_build` and remove special casing for
no-groups except in the sort order of groups. I feel like thats best
left for later.
This also reduced the scope of `App`s public API.
`get_*_with_no_heading` seemed a bit specialized to be in the public
API. #2853 looks at splitting it out into its own PR.
BREAKING CHANGE: Multiple
- `UnifiedHelpMessage` removed
- `{flags}` and `{unified}` are removed and will assert when present.
- `get_*_with_no_heading` removed
Fixes #2807
28 lines
666 B
Rust
28 lines
666 B
Rust
use clap::{app_from_crate, ErrorKind};
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static EVERYTHING: &str = "clap {{version}}
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Kevin K. <kbknapp@gmail.com>:Clap Maintainers
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A simple to use, efficient, and full-featured Command Line Argument Parser
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USAGE:
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clap
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OPTIONS:
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-h, --help Print help information
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-V, --version Print version information
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";
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#[test]
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fn app_from_crate() {
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let res = app_from_crate!().try_get_matches_from(vec!["clap", "--help"]);
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assert!(res.is_err());
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let err = res.unwrap_err();
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assert_eq!(err.kind, ErrorKind::DisplayHelp);
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assert_eq!(
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err.to_string(),
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EVERYTHING.replace("{{version}}", env!("CARGO_PKG_VERSION"))
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);
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}
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