Commit Graph

4 Commits

Author SHA1 Message Date
Stefan Holderbach
86cd387439
Refactor and fix Config<->Value mechanism (#10896)
# 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`
2023-11-08 20:31:30 +01:00
Stefan Holderbach
656f707a0b
Clean up tests containing unnecessary cwd: tokens (#9692)
# Description
The working directory doesn't have to be set for those tests (or would
be the default anyways). When appropriate also remove calls to the
`pipeline()` function. In most places kept the diff minimal and only
removed the superfluous part to not pollute the blame view. With simpler
tests also simplified things to make them more readable overall (this
included removal of the raw string literal).

Work for #8670
2023-07-17 18:43:51 +02:00
JT
4af24363c2
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)
2023-07-01 07:57:51 +12:00
Leon
ce78817f41
$env.config now always holds a record with only valid values (#7309)
# Description
Closes #7059. Rather than generate a new Record each time $env.config is
accessed (as described in that issue), instead `$env.config = ` now A)
parses the input record, then B) un-parses it into a clean Record with
only the valid values, and stores that as an env-var. The reasoning for
this is that I believe `config_to_nu_record()` (the method that performs
step B) will be useful in later PRs. (See below)

As a result, this also "fixes" the following "bug":
```
〉$env.config = 'butts'
$env.config is not a record
〉$env.config
butts
```
~~Instead, `$env.config = 'butts'` now turns `$env.config` into the
default (not the default config.nu, but `Config::default()`, which
notably has empty keybindings, color_config, menus and hooks vecs).~~

This doesn't attempt to fix #7110. cc @Kangaxx-0

# Example of new behaviour

OLD:
```
〉$env.config = ($env.config | merge { foo: 1 })
$env.config.foo is an unknown config setting
〉$env.config.foo
1
```
NEW:
```
〉$env.config = ($env.config | merge { foo: 1 })
Error:
  × Config record contains invalid values or unknown settings

Error:
  × Error while applying config changes
   ╭─[entry #1:1:1]
 1 │ $env.config = ($env.config | merge { foo: 1 })
   ·                                           ┬
   ·                                           ╰── $env.config.foo is an unknown config setting
   ╰────
  help: This value has been removed from your $env.config record.

〉$env.config.foo
Error: nu:🐚:column_not_found (link)

  × Cannot find column
   ╭─[entry #1:1:1]
 1 │ $env.config = ($env.config | merge { foo: 1 })
   ·                              ──┬──
   ·                                ╰── value originates here
   ╰────
   ╭─[entry #2:1:1]
 1 │ $env.config.foo
   ·             ─┬─
   ·              ╰── cannot find column 'foo'
   ╰────
```
# Example of new errors

OLD:
```
$env.config.cd.baz is an unknown config setting
$env.config.foo is an unknown config setting
$env.config.bar is an unknown config setting
$env.config.table.qux is an unknown config setting
$env.config.history.qux is an unknown config setting
```
NEW:
```
Error: 
  × Config record contains invalid values or unknown settings

Error:
  × Error while applying config changes
     ╭─[C:\Users\Leon\AppData\Roaming\nushell\config.nu:267:1]
 267 │     abbreviations: true # allows `cd s/o/f` to expand to `cd some/other/folder`
 268 │     baz: 3,
     ·          ┬
     ·          ╰── $env.config.cd.baz is an unknown config setting
 269 │   }
     ╰────
  help: This value has been removed from your $env.config record.

Error:
  × Error while applying config changes
     ╭─[C:\Users\Leon\AppData\Roaming\nushell\config.nu:269:1]
 269 │   }
 270 │   foo: 1,
     ·        ┬
     ·        ╰── $env.config.foo is an unknown config setting
 271 │   bar: 2,
     ╰────
  help: This value has been removed from your $env.config record.

Error:
  × Error while applying config changes
     ╭─[C:\Users\Leon\AppData\Roaming\nushell\config.nu:270:1]
 270 │   foo: 1,
 271 │   bar: 2,
     ·        ┬
     ·        ╰── $env.config.bar is an unknown config setting
     ╰────
  help: This value has been removed from your $env.config record.

Error:
  × Error while applying config changes
     ╭─[C:\Users\Leon\AppData\Roaming\nushell\config.nu:279:1]
 279 │     }
 280 │     qux: 4,
     ·          ┬
     ·          ╰── $env.config.table.qux is an unknown config setting
 281 │   }
     ╰────
  help: This value has been removed from your $env.config record.

Error:
  × Error while applying config changes
     ╭─[C:\Users\Leon\AppData\Roaming\nushell\config.nu:285:1]
 285 │     file_format: "plaintext" # "sqlite" or "plaintext"
 286 │  qux: 2
     ·       ┬
     ·       ╰── $env.config.history.qux is an unknown config setting
 287 │   }
     ╰────
  help: This value has been removed from your $env.config record.


```

# User-Facing Changes

See above.

# 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.
2022-12-10 15:34:46 +02:00