forked from extern/nushell
21b3eeed99
5 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
JT
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4af24363c2
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remove let-env, focus on mutating $env (#9574)
# Description For years, Nushell has used `let-env` to set a single environment variable. As our work on scoping continued, we refined what it meant for a variable to be in scope using `let` but never updated how `let-env` would work. Instead, `let-env` confusingly created mutations to the command's copy of `$env`. So, to help fix the mental model and point people to the right way of thinking about what changing the environment means, this PR removes `let-env` to encourage people to think of it as updating the command's environment variable via mutation. Before: ``` let-env FOO = "BAR" ``` Now: ``` $env.FOO = "BAR" ``` It's also a good reminder that the environment owned by the command is in the `$env` variable rather than global like it is in other shells. # User-Facing Changes BREAKING CHANGE BREAKING CHANGE This completely removes `let-env FOO = "BAR"` so that we can focus on `$env.FOO = "BAR"`. # 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 > toolkit check pr > ``` --> # After / Before Submitting integration scripts to update: - ✔️ [starship](https://github.com/starship/starship/blob/master/src/init/starship.nu) - ✔️ [virtualenv](https://github.com/pypa/virtualenv/blob/main/src/virtualenv/activation/nushell/activate.nu) - ✔️ [atuin](https://github.com/ellie/atuin/blob/main/atuin/src/shell/atuin.nu) (PR: https://github.com/ellie/atuin/pull/1080) - ❌ [zoxide](https://github.com/ajeetdsouza/zoxide/blob/main/templates/nushell.txt) (PR: https://github.com/ajeetdsouza/zoxide/pull/587) - ✔️ [oh-my-posh](https://github.com/JanDeDobbeleer/oh-my-posh/blob/main/src/shell/scripts/omp.nu) (pr: https://github.com/JanDeDobbeleer/oh-my-posh/pull/4011) |
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Jakub Žádník
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a3f817d71b
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Re-implement aliases (#8123)
# Description This PR adds an alternative alias implementation. Old aliases still work but you need to use `old-alias` instead of `alias`. Instead of replacing spans in the original code and re-parsing, which proved to be extremely error-prone and a constant source of panics, the new implementation creates a new command that references the old command. Consider the new alias defined as `alias ll = ls -l`. The parser creates a new command called `ll` and remembers that it is actually a `ls` command called with the `-l` flag. Then, when the parser sees the `ll` command, it will translate it to `ls -l` and passes to it any parameters that were passed to the call to `ll`. It works quite similar to how known externals defined with `extern` are implemented. The new alias implementation should work the same way as the old aliases, including exporting from modules, referencing both known and unknown externals. It seems to preserve custom completions and pipeline metadata. It is quite robust in most cases but there are some rough edges (see later). Fixes https://github.com/nushell/nushell/issues/7648, https://github.com/nushell/nushell/issues/8026, https://github.com/nushell/nushell/issues/7512, https://github.com/nushell/nushell/issues/5780, https://github.com/nushell/nushell/issues/7754 No effect: https://github.com/nushell/nushell/issues/8122 (we might revisit the completions code after this PR) Should use custom command instead: https://github.com/nushell/nushell/issues/6048 # User-Facing Changes Since aliases are now basically commands, it has some new implications: 1. `alias spam = "spam"` (requires command call) * **workaround**: use `alias spam = echo "spam"` 2. `def foo [] { 'foo' }; alias foo = ls -l` (foo defined more than once) * **workaround**: use different name (commands also have this limitation) 4. `alias ls = (ls | sort-by type name -i)` * **workaround**: Use custom command. _The common issue with this is that it is currently not easy to pass flags through custom commands and command referencing itself will lead to stack overflow. Both of these issues are meant to be addressed._ 5. TODO: Help messages, `which` command, `$nu.scope.aliases`, etc. * Should we treat the aliases as commands or should they be separated from regular commands? 6. Needs better error message and syntax highlight for recursed alias (`alias f = f`) 7. Can't create alias with the same name as existing command (`alias ls = ls -a`) * Might be possible to add support for it (not 100% sure) 8. Standalone `alias` doesn't list aliases anymore 9. Can't alias parser keywords (e.g., stuff like `alias ou = overlay use` won't work) * TODO: Needs a better error message when attempting to do so # 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` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # 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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Kangaxx-0
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0bb2e47c98
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Incorrect parsing of unbalanced braces based on issue 6914 (#7621) | ||
WindSoilder
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b47bd22b37
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Removes export env command (#6468)
* remove export_env command * remove several export env usage in test code * adjust hiding relative test case * fix clippy * adjust tests * update tests * unignore these tests to expose ut failed * using `use` instead of `overlay use` in some tests * Revert "using `use` instead of `overlay use` in some tests" This reverts commit |
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Jakub Žádník
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9b99b2f6ac
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Overlays (#5375)
* WIP: Start laying overlays * Rename Overlay->Module; Start adding overlay * Revamp adding overlay * Add overlay add tests; Disable debug print * Fix overlay add; Add overlay remove * Add overlay remove tests * Add missing overlay remove file * Add overlay list command * (WIP?) Enable overlays for env vars * Move OverlayFrames to ScopeFrames * (WIP) Move everything to overlays only ScopeFrame contains nothing but overlays now * Fix predecls * Fix wrong overlay id translation and aliases * Fix broken env lookup logic * Remove TODOs * Add overlay add + remove for environment * Add a few overlay tests; Fix overlay add name * Some cleanup; Fix overlay add/remove names * Clippy * Fmt * Remove walls of comments * List overlays from stack; Add debugging flag Currently, the engine state ordering is somehow broken. * Fix (?) overlay list test * Fix tests on Windows * Fix activated overlay ordering * Check for active overlays equality in overlay list This removes the -p flag: Either both parser and engine will have the same overlays, or the command will fail. * Add merging on overlay remove * Change help message and comment * Add some remove-merge/discard tests * (WIP) Track removed overlays properly * Clippy; Fmt * Fix getting last overlay; Fix predecls in overlays * Remove merging; Fix re-add overwriting stuff Also some error message tweaks. * Fix overlay error in the engine * Update variable_completions.rs * Adds flags and optional arguments to view-source (#5446) * added flags and optional arguments to view-source * removed redundant code * removed redundant code * fmt * fix bug in shell_integration (#5450) * fix bug in shell_integration * add some comments * enable cd to work with directory abbreviations (#5452) * enable cd to work with abbreviations * add abbreviation example * fix tests * make it configurable * make cd recornize symblic link (#5454) * implement seq char command to generate single character sequence (#5453) * add tmp code * add seq char command * Add split number flag in `split row` (#5434) Signed-off-by: Yuheng Su <gipsyh.icu@gmail.com> * Add two more overlay tests * Add ModuleId to OverlayFrame * Fix env conversion accidentally activating overlay It activated overlay from permanent state prematurely which would cause `overlay add` to misbehave. * Remove unused parameter; Add overlay list test * Remove added traces * Add overlay commands examples * Modify TODO * Fix $nu.scope iteration * Disallow removing default overlay * Refactor some parser errors * Remove last overlay if no argument * Diversify overlay examples * Make it possible to update overlay's module In case the origin module updates, the overlay add loads the new module, makes it overlay's origin and applies the changes. Before, it was impossible to update the overlay if the module changed. Co-authored-by: JT <547158+jntrnr@users.noreply.github.com> Co-authored-by: pwygab <88221256+merelymyself@users.noreply.github.com> Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com> Co-authored-by: WindSoilder <WindSoilder@outlook.com> Co-authored-by: Yuheng Su <gipsyh.icu@gmail.com> |