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(*third* try at posting this PR, #9104, like #9084, got polluted with unrelated commits. I'm never going to pull from the github feature branch again!) # Description <!-- Thank you for improving Nushell. Please, check our [contributing guide](../CONTRIBUTING.md) and talk to the core team before making major changes. Description of your pull request goes here. **Provide examples and/or screenshots** if your changes affect the user experience. --> Show parameter defaults in scope command signature, where they're available for display by help. per https://github.com/nushell/nushell/issues/8928. I found unexpected ramifications in one completer (NuHelpCompleter) and plugins, which both use the flag-formatting routine from builtin help. For the moment I made the minimum necessary changes to get the mainline scenario to pass tests and run. But we should circle back on what to do with plugins and help completer.. # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> 1. New `parameter_default` column to `signatures` table in `$nu.scope.commands` It is populated with whatever parameters can be defaulted: currently positional args and named flags. 2. Built in help (both `help <command>` and `<command> --help` will display the defaults 3. Help completer will display defaults for flags, but not for positionals. Example: A custom command with some default parameters: ``` 〉cat ~/work/dflts.nu # sample function to show defaults in help export def main [ arg1: string # mandatory positional arg2:string=abc # optional positional --switch # no default here --named:int # named flag, no default --other:string=def # flag --hard:record<foo:int bar:string, bas:bool> # default can be compound type = {foo:22, bar:"other worlds", bas:false} ] { {arg1: $arg1, arg2: $arg2, switch: $switch, named: $named, other: $other, hard: $hard, } } 〉use ~/work/dflts.nu 〉$nu.scope.commands | where name == 'dflts' | get signatures.0.any | reject short_flag description custom_completion ╭───┬────────────────┬────────────────┬──────────────────────────────────────────┬─────────────┬───────────────────────────╮ │ # │ parameter_name │ parameter_type │ syntax_shape │ is_optional │ parameter_default │ ├───┼────────────────┼────────────────┼──────────────────────────────────────────┼─────────────┼───────────────────────────┤ │ 0 │ │ input │ any │ false │ │ │ 1 │ arg1 │ positional │ string │ false │ │ │ 2 │ arg2 │ positional │ string │ true │ abc │ │ 3 │ switch │ switch │ │ true │ │ │ 4 │ named │ named │ int │ true │ │ │ 5 │ other │ named │ string │ true │ def │ │ 6 │ hard │ named │ record<foo: int, bar: string, bas: bool> │ true │ ╭───────┬───────────────╮ │ │ │ │ │ │ │ │ foo │ 22 │ │ │ │ │ │ │ │ │ bar │ other worlds │ │ │ │ │ │ │ │ │ bas │ false │ │ │ │ │ │ │ │ ╰───────┴───────────────╯ │ │ 7 │ │ output │ any │ false │ │ ╰───┴────────────────┴────────────────┴──────────────────────────────────────────┴─────────────┴───────────────────────────╯ 〉help dflts sample function to show defaults in help Usage: > dflts {flags} <arg1> (arg2) Flags: --switch - switch -- no default here --named <Int> - named flag, typed, but no default --other <String> - flag with default (default: 'def') --hard <Record([("foo", Int), ("bar", String), ("bas", Boolean)])> - default can be compound type (default: {foo: 22, bar: 'other worlds', bas: false}) -h, --help - Display the help message for this command Parameters: arg1 <string>: mandatory positional arg2 <string>: optional positional (optional, default: 'abc') ``` Compared to (relevant bits of) help output previously: ``` Flags: -h, --help - Display the help message for this command -, --switch - no default here -, --named <int> - named flag, no default -, --other <string> - flag -, --hard <record<foo: int, bar: string, bas: bool>> - default can be compound type Signatures: <any> | dflts <string> <string> -> <any> Parameters: arg1 <string>: mandatory positional (optional) arg2 <string>: optional positional ``` # Tests + Formatting <!-- Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect -A clippy::result_large_err` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass - `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the standard library > **Note** > from `nushell` you can also use the `toolkit` as follows > ```bash > use toolkit.nu # or use an `env_change` hook to activate it automatically > [x] toolkit check pr > ``` --> # After Submitting <!-- If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. --> |
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nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.