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f6853fd636
<!-- if this PR closes one or more issues, you can automatically link the PR with them by using one of the [*linking keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword), e.g. - this PR should close #xxxx - fixes #xxxx you can also mention related issues, PRs or discussions! --> Closes #12103 # 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. --> As described in #12103, this PR makes Nushell use `XDG_CONFIG_HOME` as the config directory if it exists. Otherwise, it uses the old behavior, which was to use `dirs_next::config_dir()`. Edit: We discussed choosing between `XDG_CONFIG_HOME` and the default config directory in Discord and decided against it, at least for now. <s>@kubouch also suggested letting users choose between `XDG_CONFIG_HOME` and the default config directory if config files aren't found on startup and `XDG_CONFIG_HOME` is set to a value different from the default config directory</s> On Windows and MacOS, if the `XDG_CONFIG_HOME` variable is set but `XDG_CONFIG_HOME` is either empty or doesn't exist *and* the old config directory is non-empty, Nushell will issue a warning on startup saying that it won't move files from the old config directory to the new one. To do this, I had to add a `nu_path::config_dir_old()` function. I assume that at some point, we will remove the warning message and the function can be removed too. Alternatively, instead of having that function there, `main.rs` could directly call `dirs_next::config_dir()`. # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> When `$env.XDG_CONFIG_HOME` is set to an absolute path, Nushell will use `$"($env.XDG_CONFIG_HOME)/nushell"` as its config directory (previously, this only worked on Linux). To use `App Data\Roaming` (Windows) or `Library/Application Support` (MacOS) instead (the old behavior), one can either leave `XDG_CONFIG_HOME` unset or set it to an empty string. If `XDG_CONFIG_HOME` is set, but to a non-absolute/invalid path, Nushell will report an error on startup and use the default config directory instead:  On Windows and MacOS, if the `XDG_CONFIG_HOME` variable is set but `XDG_CONFIG_HOME` is either empty or doesn't exist *and* the old config directory is non-empty, Nushell will issue a warning on startup saying that it won't move files from the old config directory to the new one.  # 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` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass (on Windows make sure to [enable developer mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging)) - `cargo run -- -c "use std testing; testing run-tests --path crates/nu-std"` 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 > toolkit check pr > ``` --> The existing config path tests have been modified to use `XDG_CONFIG_HOME` to change the config directory on all OSes, not just Linux. # 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. --> The documentation will have to be updated to note that Nushell uses `XDG_CONFIG_HOME` now. As @fdncred pointed out, it's possible for people to set `XDG_CONFIG_HOME` to, say, `~/.config/nushell` rather than `~/.config`, so the documentation could warn about that mistake. |
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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.