# Description
Following #11851, this PR adds one final conversion function for
`Value`. `Value::coerce_str` takes a `&Value` and converts it to a
`Cow<str>`, creating an owned `String` for types that needed converting.
Otherwise, it returns a borrowed `str` for `String` and `Binary`
`Value`s which avoids a clone/allocation. Where possible, `coerce_str`
and `coerce_into_string` should be used instead of `coerce_string`,
since `coerce_string` always allocates a new `String`.
# Description
This PR renames the conversion functions on `Value` to be more consistent.
It follows the Rust [API guidelines](https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv) for ad-hoc conversions.
The conversion functions on `Value` now come in a few forms:
- `coerce_{type}` takes a `&Value` and attempts to convert the value to
`type` (e.g., `i64` are converted to `f64`). This is the old behavior of
some of the `as_{type}` functions -- these functions have simply been
renamed to better reflect what they do.
- The new `as_{type}` functions take a `&Value` and returns an `Ok`
result only if the value is of `type` (no conversion is attempted). The
returned value will be borrowed if `type` is non-`Copy`, otherwise an
owned value is returned.
- `into_{type}` exists for non-`Copy` types, but otherwise does not
attempt conversion just like `as_type`. It takes an owned `Value` and
always returns an owned result.
- `coerce_into_{type}` has the same relationship with `coerce_{type}` as
`into_{type}` does with `as_{type}`.
- `to_{kind}_string`: conversion to different string formats (debug,
abbreviated, etc.). Only two of the old string conversion functions were
removed, the rest have been renamed only.
- `to_{type}`: other conversion functions. Currently, only `to_path`
exists. (And `to_string` through `Display`.)
This table summaries the above:
| Form | Cost | Input Ownership | Output Ownership | Converts `Value`
case/`type` |
| ---------------------------- | ----- | --------------- |
---------------- | -------- |
| `as_{type}` | Cheap | Borrowed | Borrowed/Owned | No |
| `into_{type}` | Cheap | Owned | Owned | No |
| `coerce_{type}` | Cheap | Borrowed | Borrowed/Owned | Yes |
| `coerce_into_{type}` | Cheap | Owned | Owned | Yes |
| `to_{kind}_string` | Expensive | Borrowed | Owned | Yes |
| `to_{type}` | Expensive | Borrowed | Owned | Yes |
# User-Facing Changes
Breaking API change for `Value` in `nu-protocol` which is exposed as
part of the plugin API.
# Description
Bump nushell version to the dev version of 0.90.2
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
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Merge after https://github.com/nushell/nushell/pull/11786
# Description
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# Description
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## Problem
I tried converting one of my Rust web scrapers to Nushell just to see
how it would be done, but quickly ran into an issue that proved annoying
to fix without diving into the source.
For instance, let's say we have the following HTML
```html
<p>Hello there, <span style="color: red;">World</span></p>
```
and we want to extract only the text within the `p` element, but not the
`span`. With the current version of nu_plugin_query, if we run this code
```nushell
echo `<p>Hello there, <span style="color: red;">World</span></p>` | query web -q "p" | get 0
# returns "Hello there, World"
# but we want only "Hello there, "
```
we will get back a `list<string>` that contains 1 string `Hello there,
World`.
To avoid scraping the span, we would have to do something like this
```nushell
const html = `<p>Hello there, <span style="color: red;">World</span></p>`
$html
| query web -q "p"
| get 0
| str replace ($html | query web -q "p > span" | get 0) ""
# returns "Hello there, "
```
In other words, we would have to make a sub scrape of the text we
*don't* want in order to subtract it from the text we *do* want.
## Solution
I didn't like this behavior, so I decided to change it. I modified the
`execute_selector_query` function to collect all text nodes in the HTML
element matching the query. Now `query web --query` will return a
`list<list<string>>`
```nushell
echo `<p>Hello there, <span style="color: red;">World</span></p>` | query web -q "p" | get 0 | to json --raw
# returns ["Hello there, ","World"]
```
This also brings `query web --query`'s behavior more in line with
[scraper's
ElementRef::text()](https://docs.rs/scraper/latest/scraper/element_ref/struct.ElementRef.html#method.text)
which "Returns an iterator over descendent text nodes", allowing you to
choose how much of an element's text you want to scrape without
resorting to string substitutions.
## Consequences
As this is a user-facing change, the usage examples will produce
different results than before. For example
```nushell
http get https://phoronix.com | query web --query 'header'
```
will return a list of lists of 1 string each, whereas before it was just
a list of strings.
I only modified the 3rd example
```nushell
# old
http get https://www.nushell.sh | query web --query 'h2, h2 + p' | group 2 | each {rotate --ccw tagline description} | flatten
# new
http get https://www.nushell.sh | query web --query 'h2, h2 + p' | each {str join} | group 2 | each {rotate --ccw tagline description} | flatten
```
to make it behave like before because I thought this one ought to show
the same results as before.
However, the second reason I changed the 3rd example is because it
otherwise panics! If we run the original 3rd example with my
modifications, we get a panic
```
thread 'main' panicked at crates/nu-protocol/src/value/record.rs:34:9:
assertion `left == right` failed
left: 2
right: 17
```
This happens because `rotate` receives a list of lists where the inner
lists have a different number of elements.
However this panic is unrelated to the changes I've made, because it can
be triggered easily without using the plugin. For instance
```nushell
# this is fine
[[[one] [two]] [[three] [four]]] | each {rotate --ccw tagline description}
# this panics!
[[[one] [two]] [[three] [four five]]] | each {rotate --ccw tagline description}
```
Though beyond the scope of this PR, I thought I'd mention this bug since
I found it while testing the usage examples. However, I intend to make a
proper issue about it tomorrow.
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
`query web --query "css selector"` now returns a `list<list<string>>`
instead of a `list<string>` to make it more in line with [scraper's
ElementRef::text()](https://docs.rs/scraper/latest/scraper/element_ref/struct.ElementRef.html#method.text).
# Tests + Formatting
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Make sure you've run and fixed any issues with these commands:
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> **Note**
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automatically
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> ```
-->
I ran `cargo fmt --all -- --check`, `cargo clippy --workspace -- -D
warnings -D clippy::unwrap_used` and the tests in the plugin.
# After Submitting
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documentation](https://github.com/nushell/nushell.github.io) after the
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-->
PR that updates the documentation to match the new 3rd example:
https://github.com/nushell/nushell.github.io/pull/1235
# Description
This PR tries to make `query web` more resilient and easier to debug
with the `--inspect` parameter when trying to scrape tables. Previously
it would just fail, now at least it tries to give you a hint.
This is some example output now of when something went wrong.
```
❯ http get https://en.wikipedia.org/wiki/List_of_cities_in_India_by_population | query web --as-table [Rank City 'Population(2011)[3]' 'Population(2001)[3][a]' 'State or union territory'] --inspect
Passed in Column Headers = ["Rank", "City", "Population(2011)[3]", "Population(2001)[3][a]", "State or union territory"]
First 2048 HTML chars = <!DOCTYPE html>
<html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-0 vector-feature-client-preferences-disabled vector-feature-client-prefs-pinned-disabled vector-toc-available" lang="en" dir="ltr">
<head>
<meta charset="UTF-8">
<title>List of cities in India by population - Wikipedia</title>
<script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-0 vector-feature-client-preferences-disabled vector-feature-client-prefs-pinned-disabled vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy","wgMonthNames":["",
"January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"9ecdad8f-2dbd-4245-b54d-9c57aea5ca45","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"List_of_cities_in_India_by_population","wgTitle":"List of cities in India by population","wgCurRevisionId":1192093210,"wgRev
Potential HTML Headers = ["City", "Population(2011)[3]", "Population(2001)[3][a]", "State or unionterritory", "Ref"]
Potential HTML Headers = ["City", "Population(2011)[5]", "Population(2001)", "State or unionterritory"]
Potential HTML Headers = [".mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:\"[ \"}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:\" ]\"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}vtePopulation of cities in India"]
Potential HTML Headers = ["vteGeography of India"]
╭──────────────────────────┬─────────────────────────────────────────────────────╮
│ Rank │ error: no data found (column name may be incorrect) │
│ City │ error: no data found (column name may be incorrect) │
│ Population(2011)[3] │ error: no data found (column name may be incorrect) │
│ Population(2001)[3][a] │ error: no data found (column name may be incorrect) │
│ State or union territory │ error: no data found (column name may be incorrect) │
╰──────────────────────────┴─────────────────────────────────────────────────────╯
```
The key here is to look at the `Passed in Column Headers` and compare
them to the `Potential HTML Headers` and couple that with the error
table at the bottom should give you a hint that, in this situation,
wikipedia has changed the column names, yet again. So we need to update
our query web statement's tables to get closer to what we want.
```
❯ http get https://en.wikipedia.org/wiki/List_of_cities_in_India_by_population | query web --as-table [City 'Population(2011)[3]' 'Population(2001)[3][a]' 'State or unionterritory' 'Ref']
╭─#──┬───────City───────┬─Population(2011)[3]─┬─Population(2001)[3][a]─┬─State or unionterritory─┬──Ref───╮
│ 0 │ Mumbai │ 12,442,373 │ 11,978,450 │ Maharashtra │ [3] │
│ 1 │ Delhi │ 11,034,555 │ 9,879,172 │ Delhi │ [3] │
│ 2 │ Bangalore │ 8,443,675 │ 5,682,293 │ Karnataka │ [3] │
│ 3 │ Hyderabad │ 6,993,262 │ 5,496,960 │ Telangana │ [3] │
│ 4 │ Ahmedabad │ 5,577,940 │ 4,470,006 │ Gujarat │ [3] │
│ 5 │ Chennai │ 4,646,732 │ 4,343,645 │ Tamil Nadu │ [3] │
│ 6 │ Kolkata │ 4,496,694 │ 4,580,546 │ West Bengal │ [3] │
│ 7 │ Surat │ 4,467,797 │ 2,788,126 │ Gujarat │ [3] │
│ 8 │ Pune │ 3,124,458 │ 2,538,473 │ Maharashtra │ [3] │
│ 9 │ Jaipur │ 3,046,163 │ 2,322,575 │ Rajasthan │ [3] │
│ 10 │ Lucknow │ 2,817,105 │ 2,185,927 │ Uttar Pradesh │ [3] │
│ 11 │ Kanpur │ 2,765,348 │ 2,551,337 │ Uttar Pradesh │ [3] │
│ 12 │ Nagpur │ 2,405,665 │ 2,052,066 │ Maharashtra │ [3] │
```
# User-Facing Changes
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helps us keep track of breaking changes. -->
# Tests + Formatting
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Make sure you've run and fixed any issues with these commands:
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> **Note**
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automatically
> toolkit check pr
> ```
-->
# After Submitting
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# Description
#11492 fixed flags for builtin commands but I missed that plugins don't
use the same `has_flag` that builtins do. This PR addresses this.
Unfortunately this means that return value of `has_flag` needs to change
from `bool` to `Result<bool, ShellError>` to produce an error when
explicit value is not a boolean (just like in case of `has_flag` for
builtin commands. It is not possible to check this in
`EvaluatedCall::try_from_call` because
# User-Facing Changes
Passing explicit values to flags of plugin commands (like `--flag=true`
`--flag=false`) should work now.
BREAKING: changed return value of `EvaluatedCall::has_flag` method from
`bool` to `Result<bool, ShellError>`
# Tests + Formatting
Added tests and updated documentation and examples
# Description
When nushell calls a plugin it now sends a configuration `Value` from
the nushell config under `$env.config.plugins.PLUGIN_SHORT_NAME`. This
allows plugin authors to read configuration provided by plugin users.
The `PLUGIN_SHORT_NAME` must match the registered filename after
`nu_plugin_`. If you register `target/debug/nu_plugin_config` the
`PLUGIN_NAME` will be `config` and the nushell config will loook like:
$env.config = {
# ...
plugins: {
config: [
some
values
]
}
}
Configuration may also use a closure which allows passing values from
`$env` to a plugin:
$env.config = {
# ...
plugins: {
config: {||
$env.some_value
}
}
}
This is a breaking change for the plugin API as the `Plugin::run()`
function now accepts a new configuration argument which is an
`&Option<Value>`. If no configuration was supplied the value is `None`.
Plugins compiled after this change should work with older nushell, and
will behave as if the configuration was not set.
Initially discussed in #10867
# User-Facing Changes
* Plugins can read configuration data stored in `$env.config.plugins`
* The plugin `CallInfo` now includes a `config` entry, existing plugins
will require updates
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
- [ ] Update [Creating a plugin (in
Rust)](https://www.nushell.sh/contributor-book/plugins.html#creating-a-plugin-in-rust)
[source](https://github.com/nushell/nushell.github.io/blob/main/contributor-book/plugins.md)
- [ ] Add "Configuration" section to [Plugins
documentation](https://www.nushell.sh/contributor-book/plugins.html)
# Description
This is a small change that updates the `--as-table`/`-t` parameter to
`SyntaxShape::List` instead of `SyntaxShape::Table`. It was always
supposed to be a list of headers. Not sure where Table came from.
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
# Tests + Formatting
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Make sure you've run and fixed any issues with these commands:
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> **Note**
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> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```
-->
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# Description
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# User-Facing Changes
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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
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- [x] reedline
- [x] released
- [x] pinned
- [ ] git dependency check
- [ ] release notes
# Description
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# Description
Further work towards the goal that we can make `Record`'s field private
and experiment with different internal representations
## Details
- Use inplace record iter in `nu-command/math/utils`
- Guarantee that existing allocation can be reused
- Use proper record iterators in `path join`
- Remove unnecesary hashmap in `path join`
- Should minimally reduce the overhead
- Unzip records in `nu-command`
- Refactor `query web` plugin to use record APIs
- Use `Record::into_values` for `values` command
- Use `Record::columns()` in `join` instead.
- Potential minor pessimisation
- Not the hot value path
- Use sane `Record` iters in example `Debug` impl
- Avoid layout assumption in `nu-cmd-extra/roll/mod`
- Potential minor pessimisation
- relegated to `extra`, changing the representation may otherwise break
this op.
- Use record api in `rotate`
- Minor risk that this surfaces some existing invalid behavior as panics
as we now validate column/value lengths
- `extra` so things are unstable
- Remove unnecessary references in `rotate`
- Bonus cleanup
# User-Facing Changes
None functional, minor potential differences in runtime. You win some,
you lose some.
# Tests + Formatting
Relying on existing tests
# Description
Use `record!` macro instead of defining two separate `vec!` for `cols`
and `vals` when appropriate.
This visually aligns the key with the value.
Further more you don't have to deal with the construction of `Record {
cols, vals }` so we can hide the implementation details in the future.
## State
Not covering all possible commands yet, also some tests/examples are
better expressed by creating cols and vals separately.
# User/Developer-Facing Changes
The examples and tests should read more natural. No relevant functional
change
# Bycatch
Where I noticed it I replaced usage of `Value` constructors with
`Span::test_data()` or `Span::unknown()` to the `Value::test_...`
constructors. This should make things more readable and also simplify
changes to the `Span` system in the future.
# Description
The issue #10318 is resolved by introducing helper methods within the
existing `get_documentation` function in the nu-engine crate. Initially,
I considered using nu-color-config crate to convert HEX config color to
ANSI color and employing the following method
[https://github.com/nushell/nushell/blob/main/crates/nu-color-config/src/color_config.rs#L9C1-L20C2](https://github.com/nushell/nushell/blob/main/crates/nu-color-config/src/color_config.rs#L9C1-L20C2).
However, this approach was deemed impractical due to circular
dependencies. Consequently, in a manner akin to how we invoke the
`table` command from the nu-command crate in `get_documentation`
function to create a themed-colored table, we invoke the `ansi` command
from nu-command to obtain the ANSI theme color code.
# User-Facing Changes
Visual Changes Only: the help command now uses configured theme, else it
falls back on default hard coded values.
# Tests + Formatting
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# Description
As part of the refactor to split spans off of Value, this moves to using
helper functions to create values, and using `.span()` instead of
matching span out of Value directly.
Hoping to get a few more helping hands to finish this, as there are a
lot of commands to update :)
# User-Facing Changes
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---------
Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>
Co-authored-by: WindSoilder <windsoilder@outlook.com>
# Description
This PR updates one of the query web examples because the wikipedia page
changed. This works again.
# User-Facing Changes
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helps us keep track of breaking changes. -->
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crates/nu-std"` to run the tests for the standard library
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# Description
This doesn't really do much that the user could see, but it helps get us
ready to do the steps of the refactor to split the span off of Value, so
that values can be spanless. This allows us to have top-level values
that can hold both a Value and a Span, without requiring that all values
have them.
We expect to see significant memory reduction by removing so many
unnecessary spans from values. For example, a table of 100,000 rows and
5 columns would have a savings of ~8megs in just spans that are almost
always duplicated.
# User-Facing Changes
Nothing yet
# Tests + Formatting
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# Description
This PR creates a new `Record` type to reduce duplicate code and
possibly bugs as well. (This is an edited version of #9648.)
- `Record` implements `FromIterator` and `IntoIterator` and so can be
iterated over or collected into. For example, this helps with
conversions to and from (hash)maps. (Also, no more
`cols.iter().zip(vals)`!)
- `Record` has a `push(col, val)` function to help insure that the
number of columns is equal to the number of values. I caught a few
potential bugs thanks to this (e.g. in the `ls` command).
- Finally, this PR also adds a `record!` macro that helps simplify
record creation. It is used like so:
```rust
record! {
"key1" => some_value,
"key2" => Value::string("text", span),
"key3" => Value::int(optional_int.unwrap_or(0), span),
"key4" => Value::bool(config.setting, span),
}
```
Since macros hinder formatting, etc., the right hand side values should
be relatively short and sweet like the examples above.
Where possible, prefer `record!` or `.collect()` on an iterator instead
of multiple `Record::push`s, since the first two automatically set the
record capacity and do less work overall.
# User-Facing Changes
Besides the changes in `nu-protocol` the only other breaking changes are
to `nu-table::{ExpandedTable::build_map, JustTable::kv_table}`.
# Description
This PR bumps nushell from release version 0.84.0 to dev version 0.84.1.
# User-Facing Changes
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# Tests + Formatting
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crates/nu-std"` to run the tests for the standard library
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# Description
`Span` is `Copy`, so we probably should not be passing references of
`Span` around. This PR replaces all instances of `&Span` with `Span`,
copying spans where necessary.
# User-Facing Changes
This alters some public functions to take `Span` instead of `&Span` as
input. Namely, `EngineState::get_span_contents`,
`nu_protocol::extract_value`, a bunch of the math commands, and
`Gstat::gstat`.
# Description
This bumps nushell to the dev version of 0.83.1 and updates the default
config files with the proper version.
# User-Facing Changes
# Tests + Formatting
# After Submitting
# Description
Bump 0.83
# User-Facing Changes
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you're using the standard code style
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- `cargo run -- -c "use std testing; testing run-tests --path
crates/nu-std"` to run the tests for the standard library
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# After Submitting
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# Description
This PR ensures functions exist to extract and create each and every
`Value` case. It also renames `Value::boolean` to `Value::bool` to match
`Value::test_bool`, `Value::as_bool`, and `Value::Bool`. Similarly,
`Value::as_integer` was renamed to `Value::as_int` to be consistent with
`Value::int`, `Value::test_int`, and `Value::Int`. These two renames can
be undone if necessary.
# User-Facing Changes
No user facing changes, but two public functions were renamed which may
affect downstream dependents.
# Description
follow up to #8529 and #8914
this works very similarly to record annotations, only difference being
that
```sh
table<name: string>
^^^^ ^^^^^^
| |
| represents the type of the items in that column
|
represents the column name
```
more info on the syntax can be found
[here](https://github.com/nushell/nushell/pull/8914#issue-1672113520)
# User-Facing Changes
**[BREAKING CHANGE]**
this change adds a field to `SyntaxShape::Table` so any plugins that
used it will have to update and include the field. though if you are
unsure of the type the table expects, `SyntaxShape::Table(vec![])` will
suffice
# Checklist
- `nu-ansi-term` remains the same
- [x] `reedline` is released and updated
- [x] release scripts are updated for `nu-cmd-base`
- [x] info blog post is online
- [ ] release notes are ready
This PR reverts https://github.com/nushell/nushell/pull/9391
We try not to revert PRs like this, though after discussion with the
Nushell team, we decided to revert this one.
The main reason is that Nushell, as a codebase, isn't ready for these
kinds of optimisations. It's in the part of the development cycle where
our main focus should be on improving the algorithms inside of Nushell
itself. Once we have matured our algorithms, then we can look for
opportunities to switch out technologies we're using for alternate
forms.
Much of Nushell still has lots of opportunities for tuning the codebase,
paying down technical debt, and making the codebase generally cleaner
and more robust. This should be the focus. Performance improvements
should flow out of that work.
Said another, optimisation that isn't part of tuning the codebase is
premature at this stage. We need to focus on doing the hard work of
making the engine, parser, etc better.
# User-Facing Changes
Reverts the HashMap -> ahash change.
cc @FilipAndersson245
# Description
see https://github.com/nushell/nushell/issues/9390
using `ahash` instead of the default hasher. this will not affect
compile time as we where already building `ahash`.
# User-Facing Changes
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# Tests + Formatting
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- `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the
standard library
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# Description
This PR updates most dependencies and tries to get in sync with
reedline.
# User-Facing Changes
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# Description
Bump nushell to 0.80.1 development version
# User-Facing Changes
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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
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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
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# After Submitting
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