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# Description Our config exists both as a `Config` struct for internal consumption and as a `Value`. The latter is exposed through `$env.config` and can be both set and read. Thus we have a complex bug-prone mechanism, that reads a `Value` and then tries to plug anything where the value is unrepresentable in `Config` with the correct state from `Config`. The parsing involves therefore mutation of the `Value` in a nested `Record` structure. Previously this was wholy done manually, with indices. To enable deletion for example, things had to be iterated over from the back. Also things were indexed in a bunch of places. This was hard to read and an invitation for bugs. With #10876 we can now use `Record::retain_mut` to traverse the records, modify anything that needs fixing, and drop invalid fields. # Parts: - Error messages now consistently use the correct spans pointing to the problematic value and the paths displayed in some messages are also aligned with the keys used for lookup. - Reconstruction of values has been fixed for: - `table.padding` - `buffer_editor` - `hooks.command_not_found` - `datetime_format` (partial solution) - Fix validation of `table.padding` input so value is not set (and underflows `usize` causing `table` to run forever with negative values) - New proper types for settings. Fully validated enums instead of strings: - `config.edit_mode` -> `EditMode` - Don't fall back to vi-mode on invalid string - `config.table.mode` -> `TableMode` - there is still a fall back to `rounded` if given an invalid `TableMode` as argument to the `nu` binary - `config.completions.algorithm` -> `CompletionAlgorithm` - `config.error_style` -> `ErrorStyle` - don't implicitly fall back to `fancy` when given an invalid value. - This should also shrink the size of `Config` as instead of 4x24 bytes those fields now need only 4x1 bytes in `Config` - Completely removed macros relying on the scope of `Value::into_config` so we can break it up into smaller parts in the future. - Factored everything into smaller files with the types and helpers for particular topics. - `NuCursorShape` now explicitly expresses the `Inherit` setting. conversion to option only happens at the interface to `reedline` |
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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.